{ "schema_version": "0.2.0", "book_version": 13, "reference": { "value": 19, "unit": "GtCO₂/yr", "label": "Atmospheric increase", "description": "Book reference: 40 human emissions − 21 natural uptake. The 10-Gt ambition is confined to the book’s conclusion." }, "clusters": [ { "id": "land", "name": "LAND" }, { "id": "ocean", "name": "OCEAN" }, { "id": "engineered", "name": "ENGINEERED" } ], "aggregation": { "strategy": "naive_standalone_sum", "warning": "Standalone sum; shared resources are not reconciled.", "coordinated_book_practical_scenario": 7.183244284363208, "shared_resource_rules": [ { "resource": "attribution", "status": "not_enforced_in_v0", "affected_methods": [ "algae", "pump", "alkalinity", "doc" ] }, { "resource": "biomass", "status": "not_enforced_in_v0", "affected_methods": [ "biochar", "beccs" ] }, { "resource": "coastal-area", "status": "not_enforced_in_v0", "affected_methods": [ "coast" ] }, { "resource": "energy", "status": "not_enforced_in_v0", "affected_methods": [ "biochar", "alkalinity", "doc", "beccs", "dac", "weather" ] }, { "resource": "geological-storage", "status": "not_enforced_in_v0", "affected_methods": [ "doc", "beccs", "dac" ] }, { "resource": "land", "status": "not_enforced_in_v0", "affected_methods": [ "forest", "soil", "peat", "grass", "biochar", "beccs", "weather" ] }, { "resource": "minerals", "status": "not_enforced_in_v0", "affected_methods": [ "alkalinity", "weather" ] }, { "resource": "nutrients", "status": "not_enforced_in_v0", "affected_methods": [ "forest", "soil", "algae", "pump" ] }, { "resource": "ocean-area", "status": "not_enforced_in_v0", "affected_methods": [ "algae", "pump", "alkalinity" ] }, { "resource": "oxygen", "status": "not_enforced_in_v0", "affected_methods": [ "pump" ] }, { "resource": "retention", "status": "not_enforced_in_v0", "affected_methods": [ "forest", "soil", "peat", "grass", "coast", "algae" ] }, { "resource": "seawater-flow", "status": "not_enforced_in_v0", "affected_methods": [ "doc" ] }, { "resource": "water", "status": "not_enforced_in_v0", "affected_methods": [ "forest", "peat", "grass" ] } ], "pipeline": [ "evaluate_method", "apply_method_bound", "reconcile_shared_resources", "sum_clusters", "sum_overall" ] }, "approaches": [ { "approach_id": "forest", "approach_name": "Forests and trees", "short_name": "Forests", "cluster": "land", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 4.32, "physical_limit_potential": 21.6, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "suitable_share", "name": "How much land is suitable?", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 50, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Forests and Trees; reference calculation and resource case", "primary": true }, { "constraint_id": "annual_uptake", "name": "How fast do trees take up carbon?", "description": "Annual uptake on the 2.16-billion-hectare teaching wedge.", "unit": "tCO₂/ha/yr", "minimum": 0, "maximum": 10, "step": 0.5, "control_type": "continuous", "default_practical_scenario": 5, "default_physical_limit": 10, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Forests and Trees; reference calculation and resource case", "primary": true }, { "constraint_id": "success_share", "name": "How much is successfully delivered?", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 80, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Forests and Trees; reference calculation and resource case", "primary": true } ], "deferred_constraint_families": [ "land", "water", "nutrients", "retention" ], "calculation_method": "book_factor_product", "equation": "2.16 billion ha × 50% × 5 tCO2/ha/yr × 80%", "constants": { "land_wedge_billion_ha": 2.16 }, "references": [ { "title": "Counting Carbon v13", "location": "Part II · Forests and Trees", "page": 44, "kind": "book_scenario" } ], "book_chapter": "Part II · Forests and Trees", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 4.32, "physical_limit": 21.6 }, "avoided_natural_releases": { "practical_scenario": 2.96, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 33.7, "d": 3, "b": 60, "f": 20, "pulse": 0.1 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "land", "water", "nutrients", "retention" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "coefficient": 2.16, "terms": [ { "id": "suitable_share", "scale": 0.01 }, { "id": "annual_uptake", "scale": 1 }, { "id": "success_share", "scale": 0.01 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 21.6, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "2.16 billion ha × 10 tCO₂/ha/yr" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": true, "ipcc": { "lower": 0.5, "upper": 10, "midpoint": 5.25, "unit": "GtCO₂/yr", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-12/", "location": "Table 12.6", "category": "Afforestation/reforestation", "qualification": "A/R comparator; does not include every forest-management intervention.", "status": "verified_range", "midpoint_definition": "Arithmetic midpoint (lower + upper)/2; not an IPCC mean", "control_mapping": "No unique IPCC parameter settings; assessment-reference mode preserves the book assumptions.", "verified_date": "2026-10-07", "applied_preset_value": 5.25 }, "review_issues": [] }, { "approach_id": "soil", "approach_name": "Soil carbon management", "short_name": "Soils", "cluster": "land", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 1.2800000000000002, "physical_limit_potential": 6.4, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "eligible", "name": "How much cropland can improve?", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 50, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Soil Carbon Management; reference calculation and resource case", "primary": true }, { "constraint_id": "uptake", "name": "Annual soil-carbon gain", "description": "Gain on the fixed 1.6-billion-hectare cropland resource.", "unit": "tCO₂/ha/yr", "minimum": 0, "maximum": 4, "step": 0.2, "control_type": "continuous", "default_practical_scenario": 2, "default_physical_limit": 4, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Soil Carbon Management; reference calculation and resource case", "primary": true }, { "constraint_id": "delivery", "name": "Net benefit after deductions", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 80, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Soil Carbon Management; reference calculation and resource case", "primary": true } ], "deferred_constraint_families": [ "land", "nutrients", "retention" ], "calculation_method": "book_factor_product", "equation": "1.6 billion ha × 50% × 2 tCO2/ha/yr × 80%", "constants": {}, "references": [ { "title": "Counting Carbon v13", "location": "Part II · Soil Carbon Management", "page": 68, "kind": "book_scenario" } ], "book_chapter": "Part II · Soil Carbon Management", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 1.2800000000000002, "physical_limit": 6.4 }, "avoided_natural_releases": { "practical_scenario": 0, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 2, "b": 27.05, "f": 20, "pulse": 0.05 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "land", "nutrients", "retention" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "coefficient": 1.6, "terms": [ { "id": "eligible", "scale": 0.01 }, { "id": "uptake", "scale": 1 }, { "id": "delivery", "scale": 0.01 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 6.4, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "1.6 billion ha × 4 tCO₂/ha/yr" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": true, "ipcc": { "lower": 0.4, "upper": 6.8, "midpoint": 3.6, "unit": "GtCO₂/yr", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-7/", "location": "§7.4.3.1", "category": "Cropland soil carbon management", "qualification": "Technical potential, medium confidence; separate from grassland soil.", "status": "verified_range", "midpoint_definition": "Arithmetic midpoint (lower + upper)/2; not an IPCC mean", "control_mapping": "No unique IPCC parameter settings; assessment-reference mode preserves the book assumptions.", "verified_date": "2026-10-07", "applied_preset_value": 3.6 }, "review_issues": [ "Book Physical Limit is below IPCC upper bound; the resource definitions differ." ] }, { "approach_id": "peat", "approach_name": "Peatlands and organic soils", "short_name": "Peat", "cluster": "land", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 0.030600000000000002, "physical_limit_potential": 0.153, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "recovery", "name": "How much peatland becomes a sink?", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 50, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Peatlands and Organic Soils; reference calculation and resource case", "primary": true }, { "constraint_id": "uptake", "name": "New peat accumulation", "description": "New accumulation on 51 million hectares; avoided oxidation is separate.", "unit": "tCO₂/ha/yr", "minimum": 0, "maximum": 3, "step": 0.1, "control_type": "continuous", "default_practical_scenario": 1.5, "default_physical_limit": 3, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Peatlands and Organic Soils; reference calculation and resource case", "primary": true }, { "constraint_id": "delivery", "name": "Net benefit after deductions", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 80, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Peatlands and Organic Soils; reference calculation and resource case", "primary": true } ], "deferred_constraint_families": [ "land", "water", "retention" ], "calculation_method": "book_factor_product", "equation": "0.051 billion ha × 50% × 1.5 tCO2/ha/yr × 80%", "constants": {}, "references": [ { "title": "Counting Carbon v13", "location": "Part II · Peatlands and Organic Soils", "page": 89, "kind": "book_scenario" } ], "book_chapter": "Part II · Peatlands and Organic Soils", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 0.030600000000000002, "physical_limit": 0.153 }, "avoided_natural_releases": { "practical_scenario": 0.84, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 0, "b": null, "f": 0, "pulse": 0 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "land", "water", "retention" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "coefficient": 0.051, "terms": [ { "id": "recovery", "scale": 0.01 }, { "id": "uptake", "scale": 1 }, { "id": "delivery", "scale": 0.01 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 0.153, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "0.051 billion ha × 3 tCO₂/ha/yr" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": true, "ipcc": { "lower": null, "upper": null, "midpoint": null, "unit": "GtCO₂/yr", "status": "no_applicable_range", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-12/", "location": "Table 12.6 and §12.3.2", "qualification": "Combined peatland/coastal restoration range (0.5–2.1 in §12.3.2) cannot be assigned to new peat alone; includes different benefits.", "control_mapping": null }, "review_issues": [ "Combined peatland/coastal restoration range (0.5–2.1 in §12.3.2) cannot be assigned to new peat alone; includes different benefits." ] }, { "approach_id": "grass", "approach_name": "Grasslands and savannas", "short_name": "Grasslands", "cluster": "land", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 0.5760000000000001, "physical_limit_potential": 3.2, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "eligible", "name": "How much grassland can improve?", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 40, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Grasslands and Savannas; reference calculation and resource case", "primary": true }, { "constraint_id": "uptake", "name": "Annual soil-carbon gain", "description": "Annual gain on the 3.2-billion-hectare grassland resource.", "unit": "tCO₂/ha/yr", "minimum": 0, "maximum": 1, "step": 0.05, "control_type": "continuous", "default_practical_scenario": 0.6, "default_physical_limit": 1, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Grasslands and Savannas; reference calculation and resource case", "primary": true }, { "constraint_id": "delivery", "name": "Net benefit after deductions", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 75, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Grasslands and Savannas; reference calculation and resource case", "primary": true } ], "deferred_constraint_families": [ "land", "water", "retention" ], "calculation_method": "book_factor_product", "equation": "3.2 billion ha × 40% × 0.6 tCO2/ha/yr × 75%", "constants": {}, "references": [ { "title": "Counting Carbon v13", "location": "Part II · Grasslands and Savannas", "page": 112, "kind": "book_scenario" } ], "book_chapter": "Part II · Grasslands and Savannas", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 0.5760000000000001, "physical_limit": 3.2 }, "avoided_natural_releases": { "practical_scenario": 0.2, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 2, "b": 27.05, "f": 20, "pulse": 0.05 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "land", "water", "retention" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "coefficient": 3.2, "terms": [ { "id": "eligible", "scale": 0.01 }, { "id": "uptake", "scale": 1 }, { "id": "delivery", "scale": 0.01 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 3.2, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "3.2 billion ha × 1 tCO₂/ha/yr" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": true, "ipcc": { "lower": 0.2, "upper": 2.6, "midpoint": 1.4000000000000001, "unit": "GtCO₂/yr", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-7/", "location": "§7.4.3.1", "category": "Grassland soil carbon management", "qualification": "Technical potential, medium confidence; separate from cropland soil.", "status": "verified_range", "midpoint_definition": "Arithmetic midpoint (lower + upper)/2; not an IPCC mean", "control_mapping": "No unique IPCC parameter settings; assessment-reference mode preserves the book assumptions.", "verified_date": "2026-10-07", "applied_preset_value": 1.4000000000000001 }, "review_issues": [] }, { "approach_id": "biochar", "approach_name": "Biochar", "short_name": "Biochar", "cluster": "land", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 0.7480000000000001, "physical_limit_potential": 3.1166667, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "biomass", "name": "Biomass available for biochar", "description": "The book allocates 1.5 Gt from a shared 2-Gt budget; its standalone upper case uses 4 Gt.", "unit": "Gt dry matter/yr", "minimum": 0, "maximum": 4, "step": 0.1, "control_type": "continuous", "default_practical_scenario": 1.5, "default_physical_limit": 4, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Biochar; reference calculation and resource case", "primary": true }, { "constraint_id": "retention", "name": "Carbon retained in char", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 50, "step": 5, "control_type": "continuous", "default_practical_scenario": 40, "default_physical_limit": 50, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Biochar; reference calculation and resource case", "primary": true }, { "constraint_id": "durability", "name": "Char remaining in durable storage", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 85, "step": 5, "control_type": "continuous", "default_practical_scenario": 80, "default_physical_limit": 85, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Biochar; reference calculation and resource case", "primary": true }, { "constraint_id": "carbon", "name": "Carbon in dry biomass", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 50, "step": 5, "control_type": "continuous", "default_practical_scenario": 50, "default_physical_limit": 50, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Biochar; reference calculation and resource case", "primary": false }, { "constraint_id": "delivery", "name": "Net benefit after lifecycle emissions", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 85, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part II · Biochar; reference calculation and resource case", "primary": false } ], "deferred_constraint_families": [ "biomass", "land", "energy" ], "calculation_method": "book_factor_product", "equation": "1.5 Gt dry matter × 50% carbon × 40% char retention × 80% durability × (44/12) × 85%", "constants": {}, "references": [ { "title": "Counting Carbon v13", "location": "Part II · Biochar", "page": 136, "kind": "book_scenario" } ], "book_chapter": "Part II · Biochar", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 0.7480000000000001, "physical_limit": 3.1166667 }, "avoided_natural_releases": { "practical_scenario": 0, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 0, "b": null, "f": 0, "pulse": 0 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "biomass", "land", "energy" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "coefficient": 3.6666666666666665, "terms": [ { "id": "biomass", "scale": 1 }, { "id": "retention", "scale": 0.01 }, { "id": "durability", "scale": 0.01 }, { "id": "carbon", "scale": 0.01 }, { "id": "delivery", "scale": 0.01 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 3.1166667, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "4 Gt dry biomass × 50% C × 50% char retention × 85% durability × 44/12" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": true, "ipcc": { "lower": 0.2, "upper": 6.6, "midpoint": 3.4, "unit": "GtCO₂e/yr", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-12/", "location": "§12.3.2", "category": "Biochar", "qualification": "Technical potential in 2050, not a common deployment forecast.", "status": "verified_range", "midpoint_definition": "Arithmetic midpoint (lower + upper)/2; not an IPCC mean", "control_mapping": "No unique IPCC parameter settings; assessment-reference mode preserves the book assumptions.", "verified_date": "2026-10-07", "applied_preset_value": 3.1166667 }, "review_issues": [ "Book Physical Limit is below IPCC upper bound; the resource definitions differ.", "IPCC midpoint exceeds book ceiling. Preset result is explicitly capped; the unaltered midpoint remains a reference marker." ] }, { "approach_id": "coast", "approach_name": "Coastal blue carbon", "short_name": "Coasts", "cluster": "ocean", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 0.01745, "physical_limit_potential": 0.26, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "mangrove_share", "name": "Mangrove area that can be restored", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 30, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Coastal Blue Carbon; reference calculation and resource case", "primary": true }, { "constraint_id": "marsh_share", "name": "Salt marsh area that can be restored", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 50, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Coastal Blue Carbon; reference calculation and resource case", "primary": true }, { "constraint_id": "seagrass_share", "name": "Seagrass area that can be restored", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 30, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Coastal Blue Carbon; reference calculation and resource case", "primary": true }, { "constraint_id": "mangrove_rate", "name": "Mangrove annual uptake", "description": "Book habitat-specific growth rates.", "unit": "tCO₂/ha/yr", "minimum": 0, "maximum": 10, "step": 0.5, "control_type": "continuous", "default_practical_scenario": 6, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Coastal Blue Carbon; reference calculation and resource case", "primary": false }, { "constraint_id": "mangrove_success", "name": "Mangrove restoration success", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 80, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Coastal Blue Carbon; reference calculation and resource case", "primary": false }, { "constraint_id": "marsh_rate", "name": "Salt marsh annual uptake", "description": "Book habitat-specific growth rates.", "unit": "tCO₂/ha/yr", "minimum": 0, "maximum": 8, "step": 0.5, "control_type": "continuous", "default_practical_scenario": 5, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Coastal Blue Carbon; reference calculation and resource case", "primary": false }, { "constraint_id": "marsh_success", "name": "Salt marsh restoration success", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 80, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Coastal Blue Carbon; reference calculation and resource case", "primary": false }, { "constraint_id": "seagrass_rate", "name": "Seagrass annual uptake", "description": "Book habitat-specific growth rates.", "unit": "tCO₂/ha/yr", "minimum": 0, "maximum": 4, "step": 0.5, "control_type": "continuous", "default_practical_scenario": 2, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Coastal Blue Carbon; reference calculation and resource case", "primary": false }, { "constraint_id": "seagrass_success", "name": "Seagrass restoration success", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 50, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Coastal Blue Carbon; reference calculation and resource case", "primary": false } ], "deferred_constraint_families": [ "coastal-area", "retention" ], "calculation_method": "coastal_habitat_sum", "equation": "0.009×0.30×6×0.80 + 0.001×0.50×5×0.80 + 0.0083×0.30×2×0.50 (billion ha basis)", "constants": {}, "references": [ { "title": "Counting Carbon v13", "location": "Part III · Coastal Blue Carbon", "page": 187, "kind": "book_scenario" } ], "book_chapter": "Part III · Coastal Blue Carbon", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 0.01745, "physical_limit": 0.26 }, "avoided_natural_releases": { "practical_scenario": 0.17, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 0, "b": null, "f": 0, "pulse": 0 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "coastal-area", "retention" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "habitats": [ { "share": "mangrove_share", "area_billion_ha": 0.009, "rate": 6, "success": 0.8 }, { "share": "marsh_share", "area_billion_ha": 0.001, "rate": 5, "success": 0.8 }, { "share": "seagrass_share", "area_billion_ha": 0.0083, "rate": 2, "success": 0.5 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 0.26, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "0.013 billion ha × 10 + 0.0032 billion ha × 8 + 0.0254 billion ha × 4 ≈ 0.26" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": false, "ipcc": { "lower": null, "upper": null, "midpoint": null, "unit": "GtCO₂/yr", "status": "no_applicable_range", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-12/", "location": "Table 12.6 and §12.3.2", "qualification": "Table 12.6 gives only <1, not a two-sided range; the combined wetland category cannot be allocated to coasts alone.", "control_mapping": null }, "review_issues": [ "Table 12.6 gives only <1, not a two-sided range; the combined wetland category cannot be allocated to coasts alone." ] }, { "approach_id": "algae", "approach_name": "Macroalgal carbon", "short_name": "Macroalgae", "cluster": "ocean", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 0.005568749999999999, "physical_limit_potential": 79.2, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "area", "name": "Area of seaweed farms", "description": "Book technical area is 10 million ha; geometric upper resource is 4.8 billion ha.", "unit": "billion ha", "minimum": 0, "maximum": 4.8, "step": 0.01, "control_type": "continuous", "default_practical_scenario": 0.01, "default_physical_limit": 4.8, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Macroalgal Carbon; reference calculation and resource case", "primary": true }, { "constraint_id": "air", "name": "Carbon replaced from the atmosphere", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 27, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Macroalgal Carbon; reference calculation and resource case", "primary": true }, { "constraint_id": "storage", "name": "Carbon reaching durable storage", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 25, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Macroalgal Carbon; reference calculation and resource case", "primary": true }, { "constraint_id": "yield", "name": "Dry seaweed yield", "description": "The book uses 10 dry tonnes per hectare in its technical case and 15 in its physical resource case.", "unit": "t/ha/yr", "minimum": 0, "maximum": 15, "step": 0.5, "control_type": "continuous", "default_practical_scenario": 10, "default_physical_limit": 15, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Macroalgal Carbon; reference calculation and resource case", "primary": false }, { "constraint_id": "carbon", "name": "Carbon in dry seaweed", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 30, "step": 5, "control_type": "continuous", "default_practical_scenario": 30, "default_physical_limit": 30, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Macroalgal Carbon; reference calculation and resource case", "primary": false }, { "constraint_id": "delivery", "name": "Net benefit after lifecycle emissions", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 75, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Macroalgal Carbon; reference calculation and resource case", "primary": false } ], "deferred_constraint_families": [ "ocean-area", "nutrients", "attribution", "retention" ], "calculation_method": "book_factor_product", "equation": "0.010 billion ha × 10 dry t/ha × 30% carbon × (44/12) × 27% air attribution × 25% storage × 75%", "constants": {}, "references": [ { "title": "Counting Carbon v13", "location": "Part III · Macroalgal Carbon", "page": 218, "kind": "book_scenario" } ], "book_chapter": "Part III · Macroalgal Carbon", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 0.005568749999999999, "physical_limit": 79.2 }, "avoided_natural_releases": { "practical_scenario": 0, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 0, "b": null, "f": 0, "pulse": 0 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "ocean-area", "nutrients", "attribution", "retention" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "coefficient": 3.6666666666666665, "terms": [ { "id": "area", "scale": 1 }, { "id": "air", "scale": 0.01 }, { "id": "storage", "scale": 0.01 }, { "id": "yield", "scale": 1 }, { "id": "carbon", "scale": 0.01 }, { "id": "delivery", "scale": 0.01 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 79.2, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "4.8 billion ha × 15 t dry biomass/ha/yr × 30% C × 44/12" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": true, "ipcc": { "lower": null, "upper": null, "midpoint": null, "unit": "GtCO₂/yr", "status": "no_applicable_range", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-12/", "location": "Table 12.6 and §12.3.2", "qualification": "No separate macroalgae range identified in the book’s AR6 WGIII assessment table. National Academies values are not relabelled IPCC.", "control_mapping": null }, "review_issues": [ "No separate macroalgae range identified in the book’s AR6 WGIII assessment table. National Academies values are not relabelled IPCC." ] }, { "approach_id": "pump", "approach_name": "Ocean biological pump", "short_name": "Biological pump", "cluster": "ocean", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 0.0176, "physical_limit_potential": 36.7, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "area", "name": "Area receiving treatment", "description": "Two million square kilometres in the book technical case; no justified area translation for its second-pump upper scenario.", "unit": "million km²", "minimum": 0, "maximum": 2, "step": 0.1, "control_type": "continuous", "default_practical_scenario": 2, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Ocean Biological Pump; reference calculation and resource case", "primary": true }, { "constraint_id": "production", "name": "Extra annual carbon production", "description": "Book increment; no assessed higher intervention range is assumed.", "unit": "gC/m²/yr", "minimum": 0, "maximum": 30, "step": 1, "control_type": "continuous", "default_practical_scenario": 30, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Ocean Biological Pump; reference calculation and resource case", "primary": true }, { "constraint_id": "export", "name": "Production exported from surface water", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 50, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Ocean Biological Pump; reference calculation and resource case", "primary": true }, { "constraint_id": "storage", "name": "Export retained at depth", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 40, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Ocean Biological Pump; reference calculation and resource case", "primary": false }, { "constraint_id": "air", "name": "Carbon replaced from the atmosphere", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 50, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Ocean Biological Pump; reference calculation and resource case", "primary": false }, { "constraint_id": "delivery", "name": "Net benefit after deductions", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 80, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Ocean Biological Pump; reference calculation and resource case", "primary": false } ], "deferred_constraint_families": [ "ocean-area", "nutrients", "oxygen", "attribution" ], "calculation_method": "book_factor_product", "equation": "2e12 m2 × 30 gC/m2/yr / 1e15 g/Gt × (44/12) × 50% × 40% × 50% × 80%", "constants": {}, "references": [ { "title": "Counting Carbon v13", "location": "Part III · Ocean Biological Pump", "page": 247, "kind": "book_scenario" } ], "book_chapter": "Part III · Ocean Biological Pump", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 0.0176, "physical_limit": 36.7 }, "avoided_natural_releases": { "practical_scenario": 0, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 0, "b": null, "f": 0, "pulse": 0 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "ocean-area", "nutrients", "oxygen", "attribution" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "coefficient": 0.0036666666666666666, "terms": [ { "id": "area", "scale": 1 }, { "id": "production", "scale": 1 }, { "id": "export", "scale": 0.01 }, { "id": "storage", "scale": 0.01 }, { "id": "air", "scale": 0.01 }, { "id": "delivery", "scale": 0.01 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 36.7, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "10 GtC/yr × 3.67 = 36.7 (book rounded conversion)" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": false, "ipcc": { "lower": 1, "upper": 3, "midpoint": 2.0, "unit": "GtCO₂/yr", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-12/", "location": "Table 12.6", "category": "Ocean fertilisation", "qualification": "Comparator for fertilisation; not every biological-pump intervention.", "status": "verified_range", "midpoint_definition": "Arithmetic midpoint (lower + upper)/2; not an IPCC mean", "control_mapping": "No unique IPCC parameter settings; assessment-reference mode preserves the book assumptions.", "verified_date": "2026-10-07", "applied_preset_value": 2.0 }, "review_issues": [ "Book Practical Scenario is outside the assessed range; compare resource and accounting boundaries." ] }, { "approach_id": "alkalinity", "approach_name": "Ocean alkalinity enhancement", "short_name": "Alkalinity", "cluster": "ocean", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 0.05796226415094341, "physical_limit_potential": 12.075471698113208, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "material", "name": "Annual alkaline material supply", "description": "Same Mg(OH)₂-equivalent chemistry as the book annual resource case.", "unit": "Gt Mg(OH)₂/yr", "minimum": 0, "maximum": 10, "step": 0.05, "control_type": "continuous", "default_practical_scenario": 0.1, "default_physical_limit": 10, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Ocean Dissolved Inorganic Carbon and Alkalinity; reference calculation and resource case", "primary": true }, { "constraint_id": "reaction", "name": "Alkalinity successfully delivered", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 80, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Ocean Dissolved Inorganic Carbon and Alkalinity; reference calculation and resource case", "primary": true }, { "constraint_id": "air", "name": "Atmospheric equilibration achieved", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 80, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Ocean Dissolved Inorganic Carbon and Alkalinity; reference calculation and resource case", "primary": true }, { "constraint_id": "delivery", "name": "Net benefit after lifecycle emissions", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 75, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Ocean Dissolved Inorganic Carbon and Alkalinity; reference calculation and resource case", "primary": false } ], "deferred_constraint_families": [ "minerals", "energy", "ocean-area", "attribution" ], "calculation_method": "book_factor_product", "equation": "0.1 Gt Mg(OH)2 / 0.0583 kg/mol × 2 eq/mol × 0.8 molCO2/eq × 0.044 kg/mol × 80% × 80% × 75%", "constants": {}, "references": [ { "title": "Counting Carbon v13", "location": "Part III · Ocean Dissolved Inorganic Carbon and Alkalinity", "page": 276, "kind": "book_scenario" } ], "book_chapter": "Part III · Ocean Dissolved Inorganic Carbon and Alkalinity", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 0.05796226415094341, "physical_limit": 12.075471698113208 }, "avoided_natural_releases": { "practical_scenario": 0, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 0, "b": null, "f": 0, "pulse": 0 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "minerals", "energy", "ocean-area", "attribution" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "coefficient": 1.207547169811321, "terms": [ { "id": "material", "scale": 1 }, { "id": "reaction", "scale": 0.01 }, { "id": "air", "scale": 0.01 }, { "id": "delivery", "scale": 0.01 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 12.075471698113208, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "10 Gt Mg(OH)₂ / 0.0583 × 2 × 0.8 × 0.044" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": true, "ipcc": { "lower": 1, "upper": 100, "midpoint": 50.5, "unit": "GtCO₂/yr", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-12/", "location": "Table 12.6", "category": "Ocean alkalinity enhancement", "qualification": "Broad potential; not limited to the book 10-Gt mineral-throughput case.", "status": "verified_range", "midpoint_definition": "Arithmetic midpoint (lower + upper)/2; not an IPCC mean", "control_mapping": "No unique IPCC parameter settings; assessment-reference mode preserves the book assumptions.", "verified_date": "2026-10-07", "applied_preset_value": 12.075471698113208 }, "review_issues": [ "Book Practical Scenario is outside the assessed range; compare resource and accounting boundaries.", "Book Physical Limit is below IPCC upper bound; the resource definitions differ.", "IPCC midpoint exceeds book ceiling. Preset result is explicitly capped; the unaltered midpoint remains a reference marker." ] }, { "approach_id": "doc", "approach_name": "Direct ocean carbon removal", "short_name": "Ocean capture", "cluster": "ocean", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 0.007645837499999998, "physical_limit_potential": 16.2, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "water", "name": "Seawater processed each day", "description": "Book technical throughput. The ocean-layer ceiling is a separate resource scenario, not a deployable pump range.", "unit": "billion m³/day", "minimum": 0, "maximum": 1, "step": 0.05, "control_type": "continuous", "default_practical_scenario": 1, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Direct Ocean Carbon Removal; reference calculation and resource case", "primary": true }, { "constraint_id": "refill", "name": "Carbon replaced from the atmosphere", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 70, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Direct Ocean Carbon Removal; reference calculation and resource case", "primary": true }, { "constraint_id": "storage", "name": "Captured carbon safely stored", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 95, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Direct Ocean Carbon Removal; reference calculation and resource case", "primary": true }, { "constraint_id": "delivery", "name": "Net benefit after lifecycle emissions", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 70, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part III · Direct Ocean Carbon Removal; reference calculation and resource case", "primary": false } ], "deferred_constraint_families": [ "energy", "geological-storage", "seawater-flow", "attribution" ], "calculation_method": "book_factor_product", "equation": "365e9 m3/yr × 0.045 kgCO2/m3 / 1e12 kg/Gt × 95% storage × 70% refill × 70%", "constants": {}, "references": [ { "title": "Counting Carbon v13", "location": "Part III · Direct Ocean Carbon Removal", "page": 307, "kind": "book_scenario" } ], "book_chapter": "Part III · Direct Ocean Carbon Removal", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 0.007645837499999998, "physical_limit": 16.2 }, "avoided_natural_releases": { "practical_scenario": 0, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 0, "b": null, "f": 0, "pulse": 0 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "energy", "geological-storage", "seawater-flow", "attribution" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "coefficient": 0.016425000000000002, "terms": [ { "id": "water", "scale": 1 }, { "id": "refill", "scale": 0.01 }, { "id": "storage", "scale": 0.01 }, { "id": "delivery", "scale": 0.01 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 16.2, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "361 trillion m³/yr × 0.045 kgCO₂/m³ / 1e12 ≈ 16.2 (rounded book endpoint)" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": false, "ipcc": { "lower": null, "upper": null, "midpoint": null, "unit": "GtCO₂/yr", "status": "no_applicable_range", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-12/", "location": "Table 12.6 and §12.3.2", "qualification": "No separate extraction-only range identified in the book’s AR6 WGIII table; electrochemical alkalinity is not direct extraction.", "control_mapping": null }, "review_issues": [ "No separate extraction-only range identified in the book’s AR6 WGIII table; electrochemical alkalinity is not direct extraction." ] }, { "approach_id": "beccs", "approach_name": "Bioenergy with carbon capture and storage", "short_name": "BECCS", "cluster": "engineered", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 0.53295, "physical_limit_potential": 206.8, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "biomass", "name": "Biomass available for BECCS", "description": "The book reserves 0.5 Gt from the shared sustainable biomass budget; its biosphere upper scenario has a different boundary.", "unit": "Gt dry matter/yr", "minimum": 0, "maximum": 0.5, "step": 0.025, "control_type": "continuous", "default_practical_scenario": 0.5, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Bioenergy with Carbon Capture and Storage; reference calculation and resource case", "primary": true }, { "constraint_id": "capture", "name": "CO₂ captured at the plant", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 90, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Bioenergy with Carbon Capture and Storage; reference calculation and resource case", "primary": true }, { "constraint_id": "additionality", "name": "Benefit beyond the no-harvest baseline", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 80, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Bioenergy with Carbon Capture and Storage; reference calculation and resource case", "primary": true }, { "constraint_id": "carbon", "name": "Carbon in dry biomass", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 50, "step": 5, "control_type": "continuous", "default_practical_scenario": 50, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Bioenergy with Carbon Capture and Storage; reference calculation and resource case", "primary": false }, { "constraint_id": "storage", "name": "Captured carbon safely stored", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 95, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Bioenergy with Carbon Capture and Storage; reference calculation and resource case", "primary": false }, { "constraint_id": "delivery", "name": "Net benefit after lifecycle emissions", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 85, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Bioenergy with Carbon Capture and Storage; reference calculation and resource case", "primary": false } ], "deferred_constraint_families": [ "biomass", "land", "energy", "geological-storage" ], "calculation_method": "book_factor_product", "equation": "0.5 Gt dry matter × 50% carbon × (44/12) × 90% capture × 95% storage × 80% additionality × 85%", "constants": {}, "references": [ { "title": "Counting Carbon v13", "location": "Part IV · Bioenergy with Carbon Capture and Storage", "page": 360, "kind": "book_scenario" } ], "book_chapter": "Part IV · Bioenergy with Carbon Capture and Storage", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 0.53295, "physical_limit": 206.8 }, "avoided_natural_releases": { "practical_scenario": 0, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 0, "b": null, "f": 0, "pulse": 0 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "biomass", "land", "energy", "geological-storage" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "coefficient": 3.6666666666666665, "terms": [ { "id": "biomass", "scale": 1 }, { "id": "capture", "scale": 0.01 }, { "id": "additionality", "scale": 0.01 }, { "id": "carbon", "scale": 0.01 }, { "id": "storage", "scale": 0.01 }, { "id": "delivery", "scale": 0.01 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 206.8, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "56.4 GtC/yr terrestrial NPP × 44/12 = 206.8" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": false, "ipcc": { "lower": 0.5, "upper": 11, "midpoint": 5.75, "unit": "GtCO₂/yr", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-12/", "location": "Table 12.6", "category": "BECCS", "qualification": "Table range; §12.3.2 gives 0.5–11.3. This rounded table comparator excludes avoided fossil substitution.", "status": "verified_range", "midpoint_definition": "Arithmetic midpoint (lower + upper)/2; not an IPCC mean", "control_mapping": "No unique IPCC parameter settings; assessment-reference mode preserves the book assumptions.", "verified_date": "2026-10-07", "applied_preset_value": 5.75 }, "review_issues": [] }, { "approach_id": "dac", "approach_name": "Direct air capture and storage", "short_name": "DACCS", "cluster": "engineered", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 0.201875, "physical_limit_potential": 230.15873, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "electricity", "name": "Clean electricity for capture", "description": "Technical case: 200 TWh; book thermodynamic upper case appropriates 29,000 TWh.", "unit": "TWh/yr", "minimum": 0, "maximum": 29000, "step": 50, "control_type": "continuous", "default_practical_scenario": 200, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Direct Air Capture and Storage; reference calculation and resource case", "primary": true }, { "constraint_id": "heat", "name": "Useful low-carbon heat", "description": "Technical case heat supply; no higher independent book heat resource is specified.", "unit": "TWh/yr", "minimum": 0, "maximum": 300, "step": 25, "control_type": "continuous", "default_practical_scenario": 300, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Direct Air Capture and Storage; reference calculation and resource case", "primary": true }, { "constraint_id": "storage", "name": "Captured carbon safely stored", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 95, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Direct Air Capture and Storage; reference calculation and resource case", "primary": true }, { "constraint_id": "delivery", "name": "Net benefit after lifecycle emissions", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 85, "default_physical_limit": null, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Direct Air Capture and Storage; reference calculation and resource case", "primary": false } ], "deferred_constraint_families": [ "energy", "geological-storage" ], "calculation_method": "dac_energy_minimum", "equation": "min(200 TWh/0.8 MWh/t, 300 TWh/1.2 MWh/t) / 1000 × 95% × 85%", "constants": { "electricity_MWh_per_t": 0.8, "heat_MWh_per_t": 1.2 }, "references": [ { "title": "Counting Carbon v13", "location": "Part IV · Direct Air Capture and Storage", "page": 387, "kind": "book_scenario" } ], "book_chapter": "Part IV · Direct Air Capture and Storage", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 0.201875, "physical_limit": 230.15873 }, "avoided_natural_releases": { "practical_scenario": 0, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 0, "b": null, "f": 0, "pulse": 0 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "energy", "geological-storage" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "equation": "min(electricity/0.8, heat/1.2)/1000 × storage/100 × delivery/100" }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 230.15873, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "29000 TWh/yr / 0.126 MWh/t / 1000 ≈ 230.15873" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": false, "ipcc": { "lower": 5, "upper": 40, "midpoint": 22.5, "unit": "GtCO₂/yr", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-12/", "location": "Table 12.6", "category": "DACCS", "qualification": "Technical potential with energy and cost limitations; not current capacity.", "status": "verified_range", "midpoint_definition": "Arithmetic midpoint (lower + upper)/2; not an IPCC mean", "control_mapping": "No unique IPCC parameter settings; assessment-reference mode preserves the book assumptions.", "verified_date": "2026-10-07", "applied_preset_value": 22.5 }, "review_issues": [ "Book Practical Scenario is outside the assessed range; compare resource and accounting boundaries." ] }, { "approach_id": "weather", "approach_name": "Enhanced weathering", "short_name": "Weathering", "cluster": "engineered", "description": "Standalone annual chapter scenario; shared resource deductions are not yet applied in this prototype.", "unit": "GtCO₂e/yr", "physical_quantity": "Annual credited additional removal; CO₂e where mixed-gas or net-delivery deductions apply.", "practical_scenario_potential": 0.20807999999999996, "physical_limit_potential": 24, "potential_bound_kind": "book_idealised_resource_case", "constraints": [ { "constraint_id": "area", "name": "Cropland receiving rock", "description": "Technical case: 150 million hectares. Upper case: all 1.6 billion hectares.", "unit": "billion ha", "minimum": 0, "maximum": 1.6, "step": 0.05, "control_type": "continuous", "default_practical_scenario": 0.15, "default_physical_limit": 1.6, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Enhanced Weathering; reference calculation and resource case", "primary": true }, { "constraint_id": "dose", "name": "Rock spread each year", "description": "Annual basalt supply per hectare.", "unit": "t/ha/yr", "minimum": 0, "maximum": 50, "step": 1, "control_type": "continuous", "default_practical_scenario": 20, "default_physical_limit": 50, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Enhanced Weathering; reference calculation and resource case", "primary": true }, { "constraint_id": "weathered", "name": "Rock reacting within the credit period", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 40, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Enhanced Weathering; reference calculation and resource case", "primary": true }, { "constraint_id": "air", "name": "Atmospheric-carbon attribution", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 80, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Enhanced Weathering; reference calculation and resource case", "primary": false }, { "constraint_id": "storage", "name": "Carbon reaching durable storage", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 85, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Enhanced Weathering; reference calculation and resource case", "primary": false }, { "constraint_id": "delivery", "name": "Net benefit after lifecycle emissions", "description": "Share retained at this stage of the book calculation.", "unit": "%", "minimum": 0, "maximum": 100, "step": 5, "control_type": "continuous", "default_practical_scenario": 85, "default_physical_limit": 100, "default_ipcc": null, "calculation_role": "Multiplicative factor in the stated book equation", "confidence": "Book scenario assumption; not a probability interval", "notes": "The control explores values from zero to the stated book resource/performance endpoint. This is an exploration interval, not a literature-assessed confidence range.", "source": "Counting Carbon v13", "uncertainty": "Site performance and feasible global deployment remain uncertain.", "source_page_or_chapter": "Part IV · Enhanced Weathering; reference calculation and resource case", "primary": false } ], "deferred_constraint_families": [ "land", "minerals", "energy" ], "calculation_method": "book_factor_product", "equation": "0.15 billion ha × 20 t rock/ha/yr × 0.30 tCO2/t × 40% × 80% × 85% × 85%", "constants": {}, "references": [ { "title": "Counting Carbon v13", "location": "Part IV · Enhanced Weathering", "page": 417, "kind": "book_scenario" } ], "book_chapter": "Part IV · Enhanced Weathering", "verification_status": "Book-derived equation; endpoint arithmetic checked; deployment feasibility not verified.", "known_reconciliation_issue": "Standalone case overlaps with shared resource allocations; not an independent additive global supply.", "outputs": { "removal": { "practical_scenario": 0.20807999999999996, "physical_limit": 24 }, "avoided_natural_releases": { "practical_scenario": 0, "physical_limit": null, "included_in_v0_total": false }, "capacity": { "status": "deferred_to_next_iteration" }, "timeline": { "book_shape": { "r": 10, "d": 0, "b": null, "f": 0, "pulse": 0 }, "status": "stored_not_evaluated_in_v0" }, "permanence": { "status": "method_specific_not_equated_across_approaches" } }, "resource_dependencies": [ "land", "minerals", "energy" ], "physical_limit_definition": "Book upper physical/resource scenario under explicitly permissive assumptions; not a harmonised universal limit.", "model": { "coefficient": 0.3, "terms": [ { "id": "area", "scale": 1 }, { "id": "dose", "scale": 1 }, { "id": "weathered", "scale": 0.01 }, { "id": "air", "scale": 0.01 }, { "id": "storage", "scale": 0.01 }, { "id": "delivery", "scale": 0.01 } ] }, "physical_limit_calculation": { "method": "book_resource_scenario", "value": 24, "qualification": "Applied as the explicit book endpoint. Where resource boundaries change, it is not reverse-engineered into technical-case sliders.", "equation": "1.6 billion ha × 50 t rock/ha/yr × 0.30 tCO₂/t rock" }, "controls_status": "Principal book factors are adjustable; remaining book quantities and conversion factors are recorded as fixed inputs.", "physical_controls_supported": true, "ipcc": { "lower": 2, "upper": 4, "midpoint": 3.0, "unit": "GtCO₂/yr", "source_report": "IPCC AR6 WGIII (2022)", "source_url": "https://www.ipcc.ch/report/ar6/wg3/chapter/chapter-12/", "location": "Table 12.6", "category": "Enhanced weathering", "qualification": "Author-judgement range; full literature range <1–95 is not used for the midpoint.", "status": "verified_range", "midpoint_definition": "Arithmetic midpoint (lower + upper)/2; not an IPCC mean", "control_mapping": "No unique IPCC parameter settings; assessment-reference mode preserves the book assumptions.", "verified_date": "2026-10-07", "applied_preset_value": 3.0 }, "review_issues": [ "Book Practical Scenario is outside the assessed range; compare resource and accounting boundaries." ] } ], "reconciliation": [ { "method": "land", "book_location": "Land portfolio and standalone chapter comparisons", "value_a": 6.954600000000001, "value_b": 6.3016000000000005, "unit": "GtCO₂e/yr", "likely_reason": "Book portfolio allocates common resources before summing; standalone cases are not independent.", "recommended_value": 6.3016000000000005, "status": "V0 intentionally shows standalone sum; coordinated aggregation requires the portfolio allocation model.", "scenario": "Practical Scenario" }, { "method": "land", "book_location": "Land portfolio and standalone chapter comparisons", "value_a": 34.469666700000005, "value_b": 32, "unit": "GtCO₂/yr", "likely_reason": "Book portfolio allocates common resources before summing; standalone cases are not independent.", "recommended_value": 32, "status": "V0 intentionally shows standalone sum; coordinated aggregation requires the portfolio allocation model.", "scenario": "Physical Limit" }, { "method": "ocean", "book_location": "Ocean portfolio and standalone chapter comparisons", "value_a": 0.10622685165094341, "value_b": 0.08017503436320755, "unit": "GtCO₂e/yr", "likely_reason": "Book portfolio allocates common resources before summing; standalone cases are not independent.", "recommended_value": 0.08017503436320755, "status": "V0 intentionally shows standalone sum; coordinated aggregation requires the portfolio allocation model.", "scenario": "Practical Scenario" }, { "method": "engineered", "book_location": "Engineered portfolio and standalone chapter comparisons", "value_a": 0.942905, "value_b": 0.80146925, "unit": "GtCO₂e/yr", "likely_reason": "Book portfolio allocates common resources before summing; standalone cases are not independent.", "recommended_value": 0.80146925, "status": "V0 intentionally shows standalone sum; coordinated aggregation requires the portfolio allocation model.", "scenario": "Practical Scenario" }, { "method": "combined", "book_location": "Combined portfolio and standalone chapter comparisons", "value_a": 8.003731851650944, "value_b": 7.183244284363208, "unit": "GtCO₂e/yr", "likely_reason": "Book portfolio allocates common resources before summing; standalone cases are not independent.", "recommended_value": 7.183244284363208, "status": "V0 intentionally shows standalone sum; coordinated aggregation requires the portfolio allocation model.", "scenario": "Practical Scenario" }, { "method": "combined", "book_location": "Combined portfolio and standalone chapter comparisons", "value_a": 639.8638683981133, "value_b": 637.3942016981132, "unit": "GtCO₂/yr", "likely_reason": "Book portfolio allocates common resources before summing; standalone cases are not independent.", "recommended_value": 637.3942016981132, "status": "V0 intentionally shows standalone sum; coordinated aggregation requires the portfolio allocation model.", "scenario": "Physical Limit" }, { "method": "global reference", "book_location": "Part I and confirmed author instruction", "value_a": 20, "value_b": 19, "unit": "GtCO₂/yr", "likely_reason": "Approximate brief value versus precise book reference (40 emissions minus 21 natural uptake).", "recommended_value": 19, "status": "Resolved: use 19; do not call this total human emissions." }, { "method": "Physical Limit terminology", "book_location": "All physical-limit resource cases", "value_a": "V0 brief calls this Physical Limit", "value_b": "v13 calls these physical-limit resource cases", "likely_reason": "Different resources and idealisations; not uniform empirical hard physical maxima.", "recommended_value": "Keep requested V0 preset name, label as book idealised resource case; enforce as a model input bound only.", "status": "Definition still needs method-by-method review." }, { "method": "alkalinity", "book_location": "Part III · Ocean Dissolved Inorganic Carbon and Alkalinity", "value_a": 48.224, "value_b": 12.075471698113208, "unit": "A = GtCO₂ stock; B = GtCO₂/yr", "likely_reason": "Whole-ocean one-off stock increment differs from annual 10-Gt mineral-throughput test.", "recommended_value": 12.075471698113208, "status": "Resolved for V0: annual test only." }, { "method": "geological storage", "book_location": "Part IV · Geological storage, p. 448", "value_a": 1, "value_b": 0, "unit": "A = GtCO₂/yr injection service; B = independent removal credit", "likely_reason": "Storage enables capture methods; adding injection as removal double-counts their carbon.", "recommended_value": "Shared limiting resource, not an additional removal orb.", "status": "Represented in architecture; coupling not yet enforced." }, { "method": "units", "book_location": "Part I accounting and method chapter deductions", "value_a": "Requested common GtCO₂/yr metric", "value_b": "Book credited values can be CO₂-equivalent", "likely_reason": "Mixed-gas and lifecycle deductions make credited benefit different from physical CO₂.", "recommended_value": "Show GtCO₂e for potential and GtCO₂ for the 19 reference; do not assert an exact physical balance.", "status": "Visible qualification; gas-resolved outputs deferred." } ], "ipcc_preset_policy": { "missing_range": "Reset to Book Practical Scenario; explicitly labelled as book fallback, never an IPCC value.", "above_ceiling": "Apply book ceiling, retain unaltered IPCC range and midpoint, disclose capped result.", "aggregation": "Mixed comparison, not an IPCC-assessed portfolio. Sum remains unreconciled." } }