Component blueprints are reusable templates of equations and inputs that calculate a transfer of CO₂e into or out of the atmosphere. They represent small discrete parts of carbon accounting that can be combined like building blocks to create custom and rigorous accounting for Removals, GHG Statements and entire Projects. This page provides an overview of all component blueprints.

​

Component Types

Component blueprints are labelled with a Type. The type represents a carbon accounting category and flux direction, either CO₂e sequestered or emitted.

Component Type	Description	CO₂e Flux Direction
activity	Fuel and energy usage, manufacturing processes and consumables	Emitted ↑
counterfactual	Baseline calculations to compare actual sequestration against alternative scenarios	Emitted ↑
loss	CO₂e losses and leakage before reaching permanent storage	Emitted ↑
reduction	Activity emissions that have been reduced by other claims, such as Book and Claim Units	Sequestered ↓
sequestration	Calculations of CO₂e sequestered through storage or natural processes	Sequestered ↓
uncertainty_discount	CO₂e discounted as a result of off-platform calculations of input uncertainty	Emitted ↑

​

Inputs, Quantity Kind and Compatible Units

Each component blueprint has inputs: the datapoints you need to provide for its calculation.

Each input is a numerically measurable property, which is called the Quantity Kind. For example: mass, volume, concentration or density. An input can accept different units as long as they are compatible with its quantity kind.

For transparency, data should be reported with the same value and units as shown in your attached sources. Components handle unit transformations automatically.

Some inputs take lists of values, for example a set of soil samples. In this case, each value in a list input must be compatible with the input’s quantity kind.

The output of the component calculation is always a mass of CO₂e (with the Quantity Kind mass_carbon). This is typically in units of either kgCO₂e or tCO₂e.

Quantity Kind	Key	Example Units
Acidity	acidity	dimensionless
Amount Of Substance Concentration	amount_of_substance_concentration	mmol / L
Amount Of Substance Per Mass	amount_of_substance_per_mass	mmol / kg, mol / kg
Area	area	ha
Area Carbon Emission Factor	area_carbon_emission_factor	kgCO2e / ha, kgCO2e / m^2
Buffer Ph	buffer_ph	dimensionless
Bulk Density	bulk_density	kg / m^3
Currency	currency	USD
Currency Carbon Emission Factor	currency_carbon_emission_factor	kgCO2e / USD, tCO2e / USD
Depth	depth	cm
Diameter	diameter	µm, cm
Dimensionless	dimensionless	dimensionless
Dimensionless Ratio	dimensionless_ratio	%
Distance	distance	km, mi
Distance Carbon Emission Factor	distance_carbon_emission_factor	kgCO2e / km, tCO2e / km
Dose Equivalent Rate	dose_equivalent_rate	mSv / year
Electric Current	electric_current	amp
Energy	energy	kWh, MWh, kJ, MJ
Energy Carbon Emission Factor	energy_carbon_emission_factor	kgCO2e / kWh, kgCO2e / MWh
Energy Density	energy_density	kWh / L, MWh / L
Fuel Economy	fuel_economy	km / L
Ionic Strength	ionic_strength	mmol / kg
Mass	mass	kg, tonne
Mass Carbon	mass_carbon	kgCO2e, tCO2e
Mass Carbon Emission Factor	mass_carbon_emission_factor	kgCO2e / kg, kgCO2e / tonne
Mass Cdr Potential	mass_cdr_potential	kgCO2e / tonne
Mass Concentration	mass_concentration	mg / L
Mass Density	mass_density	kg / m^3
Mass Distance	mass_distance	tonne * km
Mass Distance Carbon Emission Factor	mass_distance_carbon_emission_factor	gCO2e / (tonne * km), kgCO2e / (tonne * km), tCO2e / (tonne * km)
Mass Energy Density	mass_energy_density	kWh / kg, kWh / tonne, MWh / tonne
Mass Flow Rate	mass_flow_rate	tonne / hour
Mass Fraction	mass_fraction	mg / kg, %, kg / tonne, ppm
Mass Fraction Dry Basis	mass_fraction_dry_basis	mg / kg, %, kg / tonne, ppm
Mass Fraction Wet Basis	mass_fraction_wet_basis	mg / kg, %, kg / tonne, ppm
Mass Per Area	mass_per_area	kg / m^2, t / ha
Mass Ratio	mass_ratio	kg / tonne, %
Molality Of Solute	molality_of_solute	mmol / kg
Molar Mass	molar_mass	g / mol
Mole Fraction	mole_fraction	molCO2e / mol
Partial Pressure	partial_pressure	bar
Particle Diameter	particle_diameter	µm, cm
Percentage	percentage	%
Power	power	watts
Pressure	pressure	bar
Specific Surface Area	specific_surface_area	m^2 / g
Specific Volume	specific_volume	m^3 / kg, L / kg, L / tonne
Temperature	temperature	degC
Time	time	second
Voltage	voltage	volt
Volume	volume	L, m^3
Volume Carbon Emission Factor	volume_carbon_emission_factor	kgCO2e / L
Volume Distance Carbon Emission Factor	volume_distance_carbon_emission_factor	gCO2e / (teu * km), kgCO2e / (teu * km), gCO2e / (m^3 * km), kgCO2e / (m^3 * km)
Volume Flow Rate	volume_flow_rate	m^3 / hour
Volume Per Area	volume_per_area	L / ha, L / m^2

---

​

Fixed and Monitored inputs

Component inputs can either be fixed or monitored values:

• Fixed inputs: are defined once in an LCA template and reused in each removal. These are typically emission factors, standard ratios or intrinsic measurements of a material with low variability.
• Monitored inputs: are provided as new datapoints with each removal. These are measurements that vary during a projects operation, such as masses of a specific product batch, transport leg distances, volumes of fuel or material characteristics that have higher variability.

Fixed inputs should be entered in the LCA Builder. They will then be automatically applied for removals created either in Certify, or via the API if the removal template is included in the API request.

​

Activity Component Blueprints

​

Aggregated sample transport

key: aggregated_sample_transport

tags: Transportation

Constant aggregated emissions, related to transporting sample material.

Calculations

$\text{result} = aggregated\_sample\_transport$

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
aggregated_sample_transport	Aggregated sample transport	Mass Carbon	kgCO2e

​

Area-based emissions

key: area_based_emissions

tags: Embodied emissions Energy use

Emissions based on multiplying an area by its carbon emission factor. Applicable to quantifying emissions from standardized processes applied to a project area.

Calculations

$\text{result} = area \times emission\_factor$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
emission_factor	Area carbon emission factor	Area Carbon Emission Factor	kgCO2e / ha

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
area	Area	Area	ha

​

Constant emissions

key: constant_activity_emissions

Emissions based on a constant value.

Calculations

$\text{result} = constant\_activity\_emissions$

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
constant_activity_emissions	Constant emissions	Mass Carbon	kgCO2e

​

Currency-based CI emissions

key: currency_based_ci_emissions

tags: Embodied emissions

Emissions based on multiplying a currency by a carbon emission factor. Applicable to quantifying embodied emissions or emissions related to services when data of higher quality cannot be sourced.

Calculations

$\text{result} = amount\_spent \times carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_intensity	Carbon emission factor of currency	Currency Carbon Emission Factor	kgCO2e / USD

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
amount_spent	Amount spent	Currency	USD

​

Distance-based emissions

key: distance_based_ci_emissions

tags: Transportation

Emissions based on multiplying a distance by a carbon emission factor. Applicable to quantifying transportation emissions when only the distance traveled is known, this is acceptable for transportation by passenger car or airplane.

Calculations

$\text{result} = distance \times carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_intensity	Distance emission factor	Distance Carbon Emission Factor	kgCO2e / km

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
distance	Distance traveled	Distance	km

​

Electricity use emissions with low-carbon procurement

key: grid_electricity_use_with_recs

tags: Electricity Energy use

Emissions related to electric energy use, using market-based accounting for procurement of low-carbon power.

Calculations

$\text{result} = grid\_emissions + procured\_power\_emissions$

Show breakdown

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
grid_carbon_intensity	Residual mix emission factor of grid electricity	Energy Carbon Emission Factor	kgCO2e / kWh
procured_power_carbon_intensity	Carbon emission factor of procured power	Energy Carbon Emission Factor	kgCO2e / kWh

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
grid_electricity_use	Grid electricity usage	Energy	kWh
procured_power_electricity_use	Procured power electricity usage	Energy	kWh

​

Electricity-ratio based emissions

key: electricity_ratio_based_emissions

tags: Electricity Energy use

Calculates emissions based on an amount of electricity used per unit feedstock mass. Applicable to quantifying electricity emissions when electricity consumption is derived from an efficiency, such as the amount of electricity consumed by a piece of equipment per tonne of feedstock processed.

Calculations

$\text{result} = mass\_feedstock \times energy \times carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_intensity	Emission factor of energy	Energy Carbon Emission Factor	kgCO2e / kWh
energy	Energy used per unit mass of feedstock	Mass Energy Density	kWh / kg

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
mass_feedstock	Mass of feedstock	Mass	kg

​

Embodied emissions

key: embodied_emissions

tags: Embodied emissions

Constant embodied emissions. Applicable to embodied emissions reported as a single value, for example in the case where emissions are evidenced by an Environmental Product Declaration.

Calculations

$\text{result} = embodied\_emissions$

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
embodied_emissions	Embodied emissions	Mass Carbon	kgCO2e

​

Energy-based CI emissions

key: energy_based_ci_emissions

tags: Electricity Energy use

Emissions based on multiplying an energy by its carbon emission factor. If more specific information is known regarding the fuel or electricity consumed use other component blueprints that are more accurate.

Calculations

$\text{result} = energy \times carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_intensity	Carbon emission factor of energy	Energy Carbon Emission Factor	kgCO2e / kWh

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
energy	Energy used	Energy	kWh

​

Fuel consumption based transport emissions

key: fuel_consumption_based_transport

tags: Transportation

Emissions related to transporting a load, based on a fuel-consumption method. Applicable to quantifying transportation emissions when the volume of fuel consumed is derived from a vehicle efficiency. If the volume of fuel has been measured, use the component blueprints ‘Fuel usage by mass’ or ‘Fuel usage by volume’.

Calculations

$\text{result} = \frac{distance \times fuel\_carbon\_intensity}{fuel\_economy}$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
fuel_carbon_intensity	Carbon emission factor of the fuel consumed	Volume Carbon Emission Factor	kgCO2e / L
fuel_economy	Distance traveled per unit of fuel	Fuel Economy	km / L

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
distance	Distance traveled	Distance	km

​

Fuel usage by area

key: fuel_usage_by_area

tags: Energy use Fuel

Calculates emissions based on consumption of a volume of fuel per unit area, multiplied by the total area. Applicable, for example, to spreading of a feedstock, carbon-rich product or site preparation.

Calculations

$\text{result} = volume\_fuel\_per\_area \times emission\_factor \times area$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
emission_factor	Volume carbon emission factor	Volume Carbon Emission Factor	kgCO2e / L
volume_fuel_per_area	Volume of fuel consumed per unit area	Volume Per Area	L / ha

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
area	Area	Area	ha

​

Fuel usage by distance emissions, accounting for BCU claims

key: distance_based_transport_bcu

tags: Transportation

Emissions based on a distance traveled for a specific journey, accounting for BCU claims.

Calculations

$\text{result} = fuel\_usage\_accountable\_emissions + bcu\_fuel\_usage\_emissions$

Show breakdown

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
bcu_fuel_combustion_carbon_intensity	Carbon emission factor of BCU combustion	Mass Carbon Emission Factor	kgCO2e / kg
emission_factor_transport	Emission factor of transport	Mass Distance Carbon Emission Factor	gCO2e / (tonne * km)
fuel_combustion_carbon_intensity	Carbon emission factor of combustion of fuel used for journey	Mass Carbon Emission Factor	kgCO2e / kg

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
distance	Distance traveled	Distance	km
energy_density_bcu_fuel	Energy density of low-carbon fuel represented in BCUs used for transportation journey	Mass Energy Density	kWh / kg
energy_density_fuel_used	Energy density of fuel consumed during the transportation journey	Mass Energy Density	kWh / kg
mass	Mass of load	Mass	kg
mass_of_bcu_fuel	The quantity of fuel represented in BCUs used for transportation journey	Mass	kg

​

Fuel usage by mass emissions

key: fuel_usage_by_mass

tags: Energy use Fuel Transportation

Emissions based on multiplying a fuel mass by the carbon emission factor of combustion.

Calculations

$\text{result} = mass\_of\_fuel \times fuel\_combustion\_carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
fuel_combustion_carbon_intensity	Carbon emission factor of combustion	Mass Carbon Emission Factor	kgCO2e / kg

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
mass_of_fuel	Mass of fuel	Mass	kg

​

Fuel usage by mass emissions, accounting for BCU claims

key: fuel_usage_by_mass_bcu

tags: Energy use Fuel Transportation

Emissions based on a mass of fuel used for a journey, accounting for BCU claims.

Calculations

$\text{result} = fuel\_usage\_accountable\_emissions + bcu\_fuel\_usage\_emissions$

Show breakdown

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
bcu_fuel_combustion_carbon_intensity	Carbon emission factor of BCU combustion	Mass Carbon Emission Factor	kgCO2e / kg
fuel_combustion_carbon_intensity	Carbon emission factor of combustion of fuel used for journey	Mass Carbon Emission Factor	kgCO2e / kg

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
energy_density_bcu_fuel	Energy density of low-carbon fuel represented in BCUs used for transportation journey	Mass Energy Density	kWh / kg
energy_density_fuel_used	Energy density of fuel consumed during the transportation journey	Mass Energy Density	kWh / kg
mass_of_bcu_fuel	The quantity of fuel represented in BCUs used for transportation journey	Mass	kg
mass_of_fuel_used	Mass of fuel used for the journey	Mass	kg

​

Fuel usage by volume emissions

key: fuel_usage_by_volume

tags: Energy use Fuel Transportation

Emissions based on multiplying a fuel volume by the carbon emission factor of combustion.

Calculations

$\text{result} = volume\_of\_fuel \times fuel\_combustion\_carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
fuel_combustion_carbon_intensity	Fuel emission factor	Volume Carbon Emission Factor	kgCO2e / L

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
volume_of_fuel	Volume of fuel	Volume	L

​

Fuel usage by volume emissions, accounting for BCU claims

key: fuel_usage_by_volume_bcu

tags: Energy use Fuel Transportation

Emissions based on a volume of fuel used for a journey, accounting for BCU claims.

Calculations

$\text{result} = fuel\_usage\_accountable\_emissions + bcu\_fuel\_usage\_emissions$

Show breakdown

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
bcu_fuel_combustion_carbon_intensity	Carbon emission factor of BCU combustion	Volume Carbon Emission Factor	kgCO2e / L
fuel_combustion_carbon_intensity	Carbon emission factor of combustion of fuel used for journey	Volume Carbon Emission Factor	kgCO2e / L

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
energy_density_bcu_fuel	Energy density of low-carbon fuel represented in BCUs used for transportation journey	Energy Density	kWh / L
energy_density_fuel_used	Energy density of fuel consumed during the transportation journey	Energy Density	kWh / L
volume_of_bcu_fuel	The quantity of fuel represented in BCUs used for transportation journey	Volume	L
volume_of_fuel_used	Volume of fuel used for the journey	Volume	L

​

GHG direct emissions

key: ghg_direct_emissions

tags: Direct emissions

Direct emissions from a pyrolysis process where pyrolysis gases are emitted to the atmosphere or combusted.

Calculations

$\text{result} = mass\_flow \times concentration \times global\_warming\_potential$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
global_warming_potential	100-year global warming potential	Dimensionless	dimensionless

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
concentration	Concentration of warming species in emitted gas	Mass Fraction	mg / kg
mass_flow	Total mass flow of gas	Mass	kg

​

GHG leakage emissions

key: ghg_leakage_by_energy

tags: Direct emissions

Emissions due to usage of a greenhouse gas leakage into the atmosphere, based on gas energy used.

Calculations

$\text{result} = \frac{gas\_energy\_used \times global\_warming\_potential \times leakage\_fraction}{gas\_energy\_density}$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
global_warming_potential	100-year global warming potential	Dimensionless	dimensionless

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
gas_energy_density	Carbon density of gas	Mass Energy Density	kWh / kg
gas_energy_used	Energy of gas used	Energy	kWh
leakage_fraction	Fraction of gas leaked into atmosphere	Dimensionless	dimensionless

​

Grid electricity use emissions

key: grid_electricity_use

tags: Electricity Energy use

Emissions related to electric energy use. Applicable to quantifying electricity emissions when the quantity of electricity consumed is reported as a single number. If electricity consumption has been measured from a meter, use the component blueprint ‘Metered electricity use emissions’.

Calculations

$\text{result} = electricity\_use \times grid\_carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
grid_carbon_intensity	Electricity grid emission factor	Energy Carbon Emission Factor	kgCO2e / kWh

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
electricity_use	Total electricity usage	Energy	kWh

​

Mass-based CI emissions

key: mass_based_ci_emissions

tags: Embodied emissions Energy use

Emissions based on multiplying a mass by its carbon emission factor. Applicable to quantifying embodied emissions of materials and consumables when the mass consumed is known. This component is generic to any material, for fuel use see the ‘Fuel usage by mass emissions’ component blueprint .

Calculations

$\text{result} = mass \times carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_intensity	Carbon emission factor	Mass Carbon Emission Factor	kgCO2e / kg

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
mass	Mass	Mass	kg

​

Mass-distance-based CI emissions

key: mass_distance_based_ci_emissions

tags: Transportation

Emissions related to transporting a load, based on a distance-mass method. This component should be used when it’s impossible to disambiguate the mass transported from the distance traveled. For example, where multiple small trips with different masses and distances are aggregated prior to submitting them to Isometric Certify.

Calculations

$\text{result} = mass\_distance \times carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_intensity	Emission factor of transport	Mass Distance Carbon Emission Factor	gCO2e / (tonne * km)

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
mass_distance	Mass multiplied by distance	Mass Distance	tonne * km

​

Mass-ratio based emissions

key: mass_ratio_based_emissions

tags: Embodied emissions Energy use Fuel Transportation

Calculates emissions based on a mass of material used per unit feedstock mass. Applicable to quantifying embodied emissions of materials and consumables when the mass consumed is derived from an efficiency value.

Calculations

$\text{result} = mass\_ratio \times emissions\_factor \times feedstock\_mass$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
emissions_factor	Emission factor	Mass Carbon Emission Factor	kgCO2e / kg
mass_ratio	Mass of material per unit mass of feedstock	Mass Ratio	kg / tonne

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
feedstock_mass	Mass of feedstock	Mass	kg

​

Metered electricity use emissions

key: metered_energy_based_ci_emissions

tags: Electricity Energy use

Emissions based on electricity use between two meter readings multiplied by its carbon emission factor. Applicable to quantifying electricity emissions when the final and initial meter readout is known.

Calculations

$\text{result} = energy\_use \times carbon\_intensity$

Show breakdown

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_intensity	Electricity emission factor	Energy Carbon Emission Factor	kgCO2e / kWh

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
final_readout	Electricity final readout	Energy	kWh
initial_readout	Electricity initial readout	Energy	kWh

​

Proportional and additional mine emissions

key: proportional_and_additional_mine_energy_emissions

tags: Electricity Energy use Fuel

Emissions related to fuel, emulsion and electricity use, based on proportion of rock powder used and overall electricity use amplifications.

Calculations

$\text{result} = electricity\_use\_for\_deployed\_rock\_powder \times electricity\_carbon\_intensity$

Show breakdown

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
electricity_carbon_intensity	Carbon emission factor of electricity	Energy Carbon Emission Factor	kgCO2e / kWh

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
energy_use_amplification	Overall electricity use increase	Percentage	%
rock_powder_deployed	Rock powder deployed	Mass	kg
rock_powder_output	Rock powder output	Mass	kg
total_electricity_use	Overall electricity use	Energy	kWh
total_rock_output	Total rock output	Mass	kg

​

Time-based grid electricity use emissions

key: time_based_grid_electricity_use

tags: Electricity Energy use

Amount of CO₂ emitted, given a time, average power draw and energy carbon emission factor.

Calculations

$\text{result} = time \times average\_power \times grid\_carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
grid_carbon_intensity	CO₂e emitted per unit of electricity consumed	Energy Carbon Emission Factor	kgCO2e / kWh

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
average_power	Average power draw	Power	watts
time	Time the power was been drawn for	Time	second

​

Transport emissions

key: transport

tags: Transportation

Emissions related to transporting a load, based on a distance-mass method. Applicable to quantifying transportation emissions when the mass and distance traveled for an individual journey is known.

Calculations

$\text{result} = mass \times distance \times carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_intensity	Emission factor of transport	Mass Distance Carbon Emission Factor	gCO2e / (tonne * km)

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
distance	Distance traveled	Distance	km
mass	Mass of load	Mass	kg

​

Volume per feedstock-unit mass based emissions

key: specific_volume_based_emissions

tags: Energy use Fuel Transportation

Calculates emissions based on a volume of material used per unit feedstock mass. Applicable to quantifying emissions related to consumables when the volume consumed is derived from an efficiency value.

Calculations

$\text{result} = volume\_material\_per\_mass \times emissions\_factor \times feedstock\_mass$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
emissions_factor	Volume carbon emission factor	Volume Carbon Emission Factor	kgCO2e / L
volume_material_per_mass	Volume of material per unit mass of feedstock	Specific Volume	m^3 / kg

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
feedstock_mass	Mass of feedstock	Mass	kg

​

Volume-based emissions

key: volume_based_ci_emissions

tags: Embodied emissions Energy use

Emissions based on multiplying a volume by its carbon emission factor. Applicable to quantifying emissions related to consumables, for example water. This component is generic to any liquid or gas, for fuel use specifically see the ‘Fuel usage by volume emissions’ component blueprint.

Calculations

$\text{result} = volume \times carbon\_intensity$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_intensity	Volume carbon emission factor	Volume Carbon Emission Factor	kgCO2e / L

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
volume	Volume	Volume	L

​

Volume-based emissions per unit area

key: volume_based_emissions_by_area

tags: Embodied emissions

Calculates emissions based on multiplying a rate of application of a material to a project area. Applicable, for example, to spreading of a feedstock, fertilizer, carbon-rich product or site preparation. For fuel consumption by unit area see the Fuel Usage By Area component.

Calculations

$\text{result} = volume\_material\_per\_area \times emission\_factor \times area$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
emission_factor	Volume carbon emission factor	Volume Carbon Emission Factor	kgCO2e / L
volume_material_per_area	Volume of material used per unit area	Volume Per Area	L / ha

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
area	Area	Area	ha

​

Volume-distance based emissions

key: volume_distance_based_emissions

tags: Embodied emissions Energy use Transportation

Emissions based on multiplying a volume and distance by its carbon emission factor. Applicable to quantifying emissions related to transporting volume-based consumables or goods, for example water, gases, or solids in standardized shipping containers.

Calculations

$\text{result} = volume \times distance \times emission\_factor$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
emission_factor	Volume-distance carbon emission factor	Volume Distance Carbon Emission Factor	gCO2e / (teu * km)

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
distance	Distance traveled	Distance	km
volume	Volume	Volume	L

​

Counterfactual Component Blueprints

​

Biomass counterfactual storage

key: biomass_counterfactual_storage

The CO₂ stored in the biomass feedstock that would have remained durably stored in the biomass in the absence of the project.

Calculations

$\text{result} = feedstock\_co2e\_content - counterfactual\_emissions$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
counterfactual_emissions_15_years	CO₂e counterfactually released from the biomass over 15 years	Mass Carbon	kgCO2e
feedstock_carbon_content	Carbon content of the feedstock	Mass Ratio	kg / tonne
feedstock_mass	Mass of the feedstock	Mass	kg
retained_carbon_fraction_50_years	Fraction of C retained in the biomass after 50 years	Dimensionless	dimensionless

​

Feedstock replacement emissions

key: feedstock_replacement_emissions

Replacement emissions based on multiplying a mass of feedstock by its replacement emissions factor.

Calculations

$\text{result} = mass\_of\_feedstock \times replacement\_emissions\_factor$

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
replacement_emissions_factor	Replacement emissions factor for feedstock	Mass Carbon Emission Factor	kgCO2e / kg

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
mass_of_feedstock	Mass of feedstock	Mass	kg

​

Loss Component Blueprints

​

CO₂e lost to strong acid weathering

key: ew_loss_strong_acid_from_fertilizer_use

CO₂e lost to strong acid from fertilizer use

Calculations

$\text{result} = \frac{fertilizer\_application\_rate \times rock\_spread\_area \times \overset{CO₂\ molar\ mass}{\text{44.01g/mol}} \times nitrogen\_density}{\overset{Nitrogen\ molar\ mass}{\text{28.02g/mol}} \times fertilizer\_density}$

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
fertilizer_application_rate	Fertilizer application rate	Mass Per Area	kg / m^2
fertilizer_density	Fertilizer density	Mass Density	kg / m^3
nitrogen_density	Nitrogen density in fertilizer	Mass Density	kg / m^3
rock_spread_area	Rock spread area	Area	ha

​

Cation exchange capacity loss

key: ew_cec_loss

Enhanced weathering cation exchange capacity loss

Calculations

$\text{result} = all\_\_cation\_concentration\_increase\_over\_control \times soil\_density \times soil\_sampling\_depth \times rock\_spread\_area \times \overset{CO₂\ molar\ mass}{\text{44.01g/mol}}$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
all__control_baseline_concentration	Baseline concentration of cation in soil exchangeable fraction	Amount Of Substance Per Mass List	mmol / kg
all__control_end_of_reporting_period_concentration	End of reporting period concentration of cation in soil exchangeable fraction	Amount Of Substance Per Mass List	mmol / kg
all__deployment_baseline_concentration	Baseline concentration of cation in soil exchangeable fraction	Amount Of Substance Per Mass List	mmol / kg
all__deployment_end_of_reporting_period_concentration	End of reporting period concentration of cation in soil exchangeable fraction	Amount Of Substance Per Mass List	mmol / kg
rock_spread_area	Rock spread area	Area	ha
soil_density	Soil density	Mass Density	kg / m^3
soil_sampling_depth	Soil sampling depth	Distance	km

​

Constant CO₂ loss

key: constant_loss

Amount of CO₂ lost before it reached permanent storage.

Calculations

$\text{result} = constant\_loss$

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
constant_loss	Constant CO₂ loss	Mass Carbon	kgCO2e

​

Reduction Component Blueprints

​

Constant CO₂ reduction

key: constant_reduction

Amount of CO₂ activity emissions that have been reduced by other claims, such as Book and Claim Units.

Calculations

$\text{result} = constant\_reduction$

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
constant_reduction	Constant CO₂ reduction	Mass Carbon	kgCO2e

​

Sequestration Component Blueprints

​

Air-sea CO₂ uptake, DIC inputs

key: air_sea_co2_uptake

CO₂ stored via air-sea gas exchange, determined by the difference in uptake under project intervention and baseline conditions, measured via DIC. The calculation uses quantification outlined in the Air-sea CO₂ uptake protocol module.

Calculations

$\text{result} = co2\_net\_uptake\_t2 - co2\_net\_uptake\_t1$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
dic_baseline_t1	DIC under baseline, start of reporting period	Mass	kg
dic_baseline_t2	DIC under baseline, end of reporting period	Mass	kg
dic_intervention_t1	DIC under intervention, start of reporting period	Mass	kg
dic_intervention_t2	DIC under intervention, end of reporting period	Mass	kg

​

Air-sea CO₂ uptake, flux inputs

key: air_sea_co2_uptake_flux

CO₂ stored via air-sea gas exchange, determined by the difference in cumulative air-sea CO₂ flux under project intervention and baseline conditions. The calculation uses quantification outlined in the Air-sea CO₂ uptake protocol module.

Calculations

$\text{result} = flux\_delta\_t2 - flux\_delta\_t1$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
flux_baseline_t1	Air-sea CO₂ flux under baseline, start of reporting period	Mass Carbon	kgCO2e
flux_baseline_t2	Air-sea CO₂ flux under baseline, end of reporting period	Mass Carbon	kgCO2e
flux_intervention_t1	Air-sea CO₂ flux under intervention, start of reporting period	Mass Carbon	kgCO2e
flux_intervention_t2	Air-sea CO₂ flux under intervention, end of reporting period	Mass Carbon	kgCO2e

​

Air-sea CO₂ uptake, mass inputs

key: air_sea_co2_uptake_mass

CO₂ stored via air-sea gas exchange, determined by the mass of alkalinity added, alkalinity content and modelled efficiency of CO₂ uptake.

Calculations

$\text{result} = total\_dosed\_alkalinity \times uptake\_efficiency$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
far_field_flux_delta_t1	Cumulative air-sea CO₂ flux delta in far field, start of reporting period	Mass Carbon	kgCO2e
far_field_flux_delta_t2	Cumulative air-sea CO₂ flux delta in far field, end of reporting period	Mass Carbon	kgCO2e
feedstock_alkalinity_mass_fraction	Mass fraction of alkalinity in feedstock, final measured value	Mass Fraction	mg / kg
feedstock_alkalinity_mass_fraction_pre	Mass fraction of alkalinity in feedstock, preliminary value	Mass Fraction	mg / kg
feedstock_mass	Mass of feedstock added during reporting period	Mass	kg
near_field_flux_delta_t1	Cumulative air-sea CO₂ flux delta in near field, start of reporting period	Mass Carbon	kgCO2e
near_field_flux_delta_t2	Cumulative air-sea CO₂ flux delta in near field, end of reporting period	Mass Carbon	kgCO2e

​

Biochar sequestration, 1000 year durability

key: biochar_sequestration_1000_year

Amount of CO₂ stored via biochar sequestration, given biochar mass and samples evidencing random reflectance properties and carbon content. Applicable to the 1000 year durability option from the Biochar Storage in Agricultural Soils module based on assessment of biochar permanence according to Sanei et al. (2024).

Calculations

$\text{result} = product\_mass \times \overline{carbon\_contents} \times durable\_fraction \times \overset{CO₂\ equivalent\ of\ pure\ carbon}{\text{3.667}}$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_contents	Total carbon content of biochar	Mass Fraction Dry Basis List	mg / kg
product_mass	Mass of product	Mass	kg
s_fraction	Fraction of reflectance samples above 2% benchmark in each sample	Dimensionless List	dimensionless

​

Biochar sequestration, 200 year durability

key: biochar_sequestration_200_year

Amount of CO₂ stored via biochar sequestration, given a carbon content, mass and durable fraction measurement. Applicable to the 200 year durability option from the Biochar Storage in Agricultural Soils module. Parameters a, b and c from Woolf et al. (2021).

Calculations

$\text{result} = product\_mass \times \overline{carbon\_contents} \times durable\_fraction \times \overset{CO₂\ equivalent\ of\ pure\ carbon}{\text{3.667}}$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_contents	Carbon content of biochar	Mass Fraction Dry Basis List	mg / kg
h_c_molar_ratios	Hydrogen to organic carbon molar ratio	Dimensionless Ratio List	%
product_mass	Mass of product	Mass	kg
soil_temp	Mean average soil temperature	Temperature	degC

​

Biomass burial with moisture correction

key: biomass_burial_with_moisture_correction

Amount of CO₂ stored, given a carbon concentration, mass and moisture contents. Applicable to quantifying CO₂ stored for the protocol Subsurface Biomass Carbon Removal and Storage.

Calculations

$\text{result} = carbon\_content \times buried\_mass \times co2e\_of\_carbon \times moisture\_correction$

Show breakdown

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
co2e_of_carbon	CO₂ equivalent of pure carbon	Dimensionless	dimensionless

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
average_material_moisture_content	Average moisture content across all material buried	Dimensionless	dimensionless
average_sampled_moisture_content	Average moisture content in samples used to determine carbon content	Dimensionless	dimensionless
buried_mass	Mass of injectant buried	Mass	kg
carbon_content	Carbon content of injectant	Dimensionless	dimensionless

​

Biomass injection from winsorized mean

key: biomass_injection_from_winsorized_mean

Amount of CO₂ stored, given a mass and multiple measured carbon concentration values, from which a mean is calculated. Outliers for the mean are accounted for by winsorizing the measured carbon contents with mean and standard deviation calculated from historical carbon contents from the same feedstock. Applicable to quantifying CO₂ stored for the protocols Biomass Geological Storage and Bio-oil Geological Storage.

Calculations

$\text{result} = injectant\_mass \times mean\_carbon\_content \times co2e\_of\_carbon$

Show breakdown

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
co2e_of_carbon	CO₂ equivalent of pure carbon	Dimensionless	dimensionless

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
historical_carbon_content_measurements	Historical carbon content measurements of injectant	Dimensionless List	dimensionless
injectant_carbon_content_measurements	Carbon content measurements of injectant	Dimensionless List	dimensionless
injectant_mass	Mass of injectant	Mass	kg

​

Blended bio oil injection

key: blended_bio_oil_injection

Amount of CO₂ stored, given a carbon concentration and mass. Applicable to quantifying CO₂ stored for Bio-oil Geological Storage when batches of bio-oil are blended prior to injection.

Calculations

$\text{result} = \overline{unblended\_bio\_oil\_carbon\_contents} \times unblended\_bio\_oil\_mass \times co2e\_of\_carbon$

Show breakdown

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
co2e_of_carbon	CO₂ equivalent of pure carbon	Dimensionless	dimensionless

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
blended_bio_oil_mass	Total mass of injectant after blending	Mass	kg
liquid_caustic_soda_mass	Liquid caustic soda mass	Mass	kg
salt_mass	Mass of salt	Mass	kg
unblended_bio_oil_carbon_contents	Carbon content of unblended bio-oil	Dimensionless List	dimensionless

​

CO₂ removed from weathering using TICAT method

key: enhanced_weathering_sequestration_ticat

CO₂ removed from weathering using the TICAT method described in Reershemius et al 2023.

Calculations

$\text{result} = ca\_co2\_removed + mg\_co2\_removed + na\_co2\_removed$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
ca_baseline_soil_mass_fraction	Baseline calcium mass fraction in soil	Mass Fraction List	mg / kg
ca_end_soil_mass_fraction	Calcium mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
ca_feedstock_mass_fraction	Calcium mass fraction in feedstock	Mass Fraction	mg / kg
feedstock_mass	Mass of feedstock	Mass	kg
mg_baseline_soil_mass_fraction	Baseline magnesium mass fraction in soil	Mass Fraction List	mg / kg
mg_end_soil_mass_fraction	Magnesium mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
mg_feedstock_mass_fraction	Magnesium mass fraction in feedstock	Mass Fraction	mg / kg
na_baseline_soil_mass_fraction	Baseline sodium mass fraction in soil	Mass Fraction List	mg / kg
na_end_soil_mass_fraction	Sodium mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
na_feedstock_mass_fraction	Sodium mass fraction in feedstock	Mass Fraction	mg / kg
tracer_baseline_soil_mass_fraction	Tracer mass fraction in soil before application	Mass Fraction List	mg / kg
tracer_end_soil_mass_fraction	Tracer mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
tracer_feedstock_mass_fraction	Tracer mass fraction in feedstock	Mass Fraction	mg / kg

​

CO₂ removed from weathering using tracer ratio method

key: enhanced_weathering_sequestration_ticat_ratio

CO₂ removed from weathering using the tracer ratio method.

Calculations

$\text{result} = \frac{average\_f\_d \times feedstock\_mass \times cation\_feedstock\_concentration \times cation\_charge \times co2\_molar\_mass}{cation\_molar\_mass}$

Show breakdown

Fixed inputs

Input Key	Display Name	Quantity Kind	Example Unit
cation_molar_mass	Molar mass of cation	Molar Mass	g / mol
co2_molar_mass	Molar mass of CO₂	Molar Mass	g / mol

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
cation_baseline_soil_concentration	Cation concentration in baseline soil	Mass Fraction List	mg / kg
cation_charge	Cation charge	Dimensionless	dimensionless
cation_feedstock_concentration	Cation concentration in feedstock	Mass Fraction	mg / kg
cation_post_application_concentration	Cation concentration in soil at end of reporting period	Mass Fraction List	mg / kg
feedstock_mass	Mass of feedstock	Mass	kg
tracer_1_baseline_soil_concentration	Tracer 1 concentration in baseline soil	Mass Fraction List	mg / kg
tracer_1_feedstock_concentration	Tracer 1 concentration in feedstock	Mass Fraction	mg / kg
tracer_1_post_application_concentration	Tracer 1 concentration in soil at end of reporting period	Mass Fraction List	mg / kg
tracer_2_baseline_soil_concentration	Tracer 2 concentration in baseline soil	Mass Fraction List	mg / kg
tracer_2_feedstock_concentration	Tracer 2 concentration in feedstock	Mass Fraction	mg / kg
tracer_2_post_application_concentration	Tracer 2 concentration in soil at end of reporting period	Mass Fraction List	mg / kg

​

CO₂ stored via mineralization

key: dac_mineralized_co2

CO₂ stored via mineralization, determined by the difference in mass of carbonated material at the start and end of the batch process.

Calculations

$\text{result} = co2\_mineralized\_delta \times \left(1 - reversal\_risk\right)$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_content_t1	Carbon content, start of batch process	Mass Ratio	kg / tonne
carbon_content_t2	Carbon content, end of batch process	Mass Ratio	kg / tonne
material_weight_t1	Weight of carbonated material, start of batch process	Mass	kg
material_weight_t2	Weight of carbonated material, end of batch process	Mass	kg
moisture_content_t1	Moisture content, start of batch process	Mass Ratio	kg / tonne
moisture_content_t2	Moisture content, end of batch process	Mass Ratio	kg / tonne
reversal_risk	Risk of reversal	Percentage	%

​

CO₂e sequestered post losses

key: iemt_with_losses_2024_11

CO₂ removed from weathering using the immobile element method described in Reershemius et al 2023.

Calculations

$\text{result} = \left(sequestration\_output\_total - strong\_acid\_loss - plant\_uptake\_loss\right) \times river\_retention\_factor \times ocean\_retention\_factor$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
ca_cation_baseline_soil_concentration	Baseline calcium mass fraction in soil	Mass Fraction List	mg / kg
ca_cation_baseline_soil_concentration_control	Calcium mass fraction in control baseline soil	Mass Fraction List	mg / kg
ca_cation_feedstock_concentration	Calcium mass fraction in feedstock	Mass Fraction	mg / kg
ca_cation_post_application_concentration	Calcium mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
ca_cation_post_application_concentration_control	Calcium mass fraction in control soil at end of reporting period	Mass Fraction List	mg / kg
feedstock_mass	Mass of feedstock	Mass	kg
mg_cation_baseline_soil_concentration	Baseline magnesium mass fraction in soil	Mass Fraction List	mg / kg
mg_cation_baseline_soil_concentration_control	Magnesium mass fraction in control baseline soil	Mass Fraction List	mg / kg
mg_cation_feedstock_concentration	Magnesium mass fraction in feedstock	Mass Fraction	mg / kg
mg_cation_post_application_concentration	Magnesium mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
mg_cation_post_application_concentration_control	Magnesium mass fraction in control soil at end of reporting period	Mass Fraction List	mg / kg
ocean_retention_factor	Percentage of CO₂ retained after losses in ocean storage	Percentage	%
plant_uptake_loss	Plant uptake loss	Mass Carbon	kgCO2e
river_retention_factor	Percentage of CO₂ retained after losses in river runoff	Percentage	%
strong_acid_loss	Strong acid loss	Mass Carbon	kgCO2e
tracer_baseline_soil_concentration	Tracer mass fraction in soil before application	Mass Fraction List	mg / kg
tracer_feedstock_concentration	Tracer mass fraction in feedstock	Mass Fraction	mg / kg
tracer_post_application_concentration	Tracer mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg

​

Carbon rich substance sequestration

key: carbon_rich_substance_sequestration

Amount of CO₂ stored, given a carbon concentration and mass. Applicable to quantifying CO₂ stored for the protocols Biomass Geological Storage, Bio-oil Geological Storage, Subsurface Biomass Carbon Removal and Storage and Biochar Production and Storage.

Calculations

$\text{result} = product\_mass \times carbon\_content \times \overset{CO₂\ equivalent\ of\ pure\ carbon}{\text{3.667}}$

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_content	Carbon content of product	Dimensionless	dimensionless
product_mass	Mass of product	Mass	kg

​

Carbon rich substance sequestration from mean

key: carbon_rich_substance_sequestration_from_mean

Amount of CO₂ stored, given a mass and multiple supplied carbon concentration values, from which a mean is calculated. Applicable to quantifying CO₂ stored for the protocols Biomass Geological Storage, Bio-oil Geological Storage, Subsurface Biomass Carbon Removal and Storage and Biochar Production and Storage.

Calculations

$\text{result} = product\_mass \times \overline{carbon\_contents} \times \overset{CO₂\ equivalent\ of\ pure\ carbon}{\text{3.667}}$

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_contents	Carbon content of product	Dimensionless List	dimensionless
product_mass	Mass of product	Mass	kg

​

Carbon rich substance sequestration with estimate

key: carbon_rich_substance_sequestration_with_estimate

Amount of CO₂ stored. The carbon content is calculated from carbon content samples of the same feedstock from different removals. The carbon concentration is then calculated by winsorizing using a three standard deviation limit, then taking the mean and subtracting one standard error to account for sample variability. Applicable to quantifying CO₂ stored for the protocols Biomass Geological Storage, Bio-oil Geological Storage, Subsurface Biomass Carbon Removal and Storage and Biochar Production and Storage.

Calculations

$\text{result} = product\_mass \times estimated\_discounted\_carbon\_content \times \overset{CO₂\ equivalent\ of\ pure\ carbon}{\text{3.667}}$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
carbon_contents	Estimated carbon content of product	Dimensionless List	dimensionless
product_mass	Mass of product	Mass	kg

​

Dissolved carbon sequestration

key: dissolved_carbon_storage_solid_phase_steady_state

Mass of CO₂ converted to bicarbonate ions in the wastewater stream, determined using direct measurements within the treatment plant and subtracting any potential losses upon effluent discharge. The calculation uses quantification of dissolved feedstock in the solid phase (Option 1 in the WAE protocol), and assumes a steady state of feedstock mass in the control volume.

Calculations

$\text{result} = co2\_removed\_from\_feedstock\_dissolution - co2\_release\_from\_non\_carbonic\_acid\_weathering$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
dissolved_fs_non_carb	Fraction of feedstock dissolved by non-carbonic acid	Percentage	%
feedstock_molar_mass	Feedstock molar mass	Molar Mass	g / mol
losses	Losses of CO₂ due to riverine and oceanic processes	Mole Fraction	molCO2e / mol
mean_feedstock_concentration_dosing	Mean concentration of feedstock in dosing flow	Mass Concentration	mg / L
mean_tic_effluent	Mean mass fraction of feedstock in effluent	Mass Fraction	mg / kg
mean_tic_was	Mean mass fraction of feedstock in sludge	Mass Fraction	mg / kg
molar_ratio_carbonic_weathering	Molar ratio of CO₂ to feedstock consumption from carbonic acid weathering	Mole Fraction	molCO2e / mol
molar_ratio_non_carbonic_weathering	Molar ratio of CO₂ release/feedstock consumption from non-carbonic acid weathering	Mole Fraction	molCO2e / mol
total_flow_dosing	Total flow volume from dosing	Volume	L
total_flow_effluent	Total flow volume of effluent	Volume	L
total_flow_was	Total flow volume of sludge	Volume	L
tss_effluent	Total suspended solids of feedstock in effluent	Mass Concentration	mg / L
tss_was	Total suspended solids of feedstock in sludge	Mass Concentration	mg / L

​

Dissolved carbon sequestration, manual dosing

key: dissolved_carbon_storage_manual_dosing

Mass of CO₂ converted to bicarbonate ions in the wastewater stream, determined using direct measurements within the treatment plant and subtracting any potential losses upon effluent discharge. Feedstock is dosed manually and measured as a total mass value.

Calculations

$\text{result} = co2\_removed\_from\_feedstock\_dissolution - co2\_release\_from\_non\_carbonic\_acid\_weathering$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
dissolved_fs_non_carb	Fraction of feedstock dissolved by non-carbonic acid	Percentage	%
feedstock_molar_mass	Feedstock molar mass	Molar Mass	g / mol
losses	Losses of CO₂ due to riverine and oceanic processes	Mole Fraction	molCO2e / mol
mass_dosing_rp	Total dosing mass of feedstock	Mass	kg
mean_tic_effluent	Mean mass fraction of feedstock in effluent	Mass Fraction	mg / kg
mean_tic_was	Mean mass fraction of feedstock in sludge	Mass Fraction	mg / kg
molar_ratio_carbonic_weathering	Molar ratio of CO₂ to feedstock consumption from carbonic acid weathering	Mole Fraction	molCO2e / mol
molar_ratio_non_carbonic_weathering	Molar ratio of CO₂ release/feedstock consumption from non-carbonic acid weathering	Mole Fraction	molCO2e / mol
total_flow_effluent	Total flow volume of effluent	Volume	L
total_flow_was	Total flow volume of sludge	Volume	L
tss_effluent	Total suspended solids of feedstock in effluent	Mass Concentration	mg / L
tss_was	Total suspended solids of feedstock in sludge	Mass Concentration	mg / L

​

Dissolved carbon sequestration, mass inputs

key: dissolved_carbon_storage_mass_inputs

Mass of CO₂ converted to bicarbonate ions in the wastewater stream, determined using direct measurements within the treatment plant and subtracting any potential losses upon effluent discharge. Feedstock measurements for dosing and waste streams provided as mass inputs.

Calculations

$\text{result} = co2\_removed\_from\_feedstock\_dissolution - co2\_release\_from\_non\_carbonic\_acid\_weathering$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
dissolved_fs_non_carb	Fraction of feedstock dissolved by non-carbonic acid	Percentage	%
feedstock_molar_mass	Feedstock molar mass	Molar Mass	g / mol
losses	Losses of CO₂ due to riverine and oceanic processes	Mole Fraction	molCO2e / mol
mass_dosing_rp	Total dosing mass of feedstock	Mass	kg
mass_effluent_rp	Total flow mass of feedstock in effluent stream	Mass	kg
mass_was_rp	Total flow mass of feedstock in sludge	Mass	kg
molar_ratio_carbonic_weathering	Molar ratio of CO₂ to feedstock consumption from carbonic acid weathering	Mole Fraction	molCO2e / mol
molar_ratio_non_carbonic_weathering	Molar ratio of CO₂ release/feedstock consumption from non-carbonic acid weathering	Mole Fraction	molCO2e / mol

​

Enhanced weathering - immobile element tracer method

key: iemt_2025_04

CO₂ removed from weathering using the immobile element method described in Reershemius et al 2023, using an immobile tracer. Accounts for losses from strong acids, plant uptake, and river and ocean networks. Can accept multiple feedstock measurements for each element, and the mean will be used.

Calculations

$\text{result} = \text{ExpectedValue}(co2\_sequestered \times strong\_acid\_retention\_factor \times plant\_retention\_factor \times river\_retention\_factor \times ocean\_retention\_factor)$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
ca_baseline_soil_mass_fraction	Baseline calcium mass fraction in soil	Mass Fraction List	mg / kg
ca_baseline_soil_mass_fraction_control	Calcium mass fraction in control baseline soil	Mass Fraction List	mg / kg
ca_end_soil_mass_fraction	Calcium mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
ca_end_soil_mass_fraction_control	Calcium mass fraction in control soil at end of reporting period	Mass Fraction List	mg / kg
ca_feedstock_mass_fraction	Calcium mass fraction in feedstock	Mass Fraction List	mg / kg
feedstock_mass	Mass of feedstock	Mass	kg
mg_baseline_soil_mass_fraction	Baseline magnesium mass fraction in soil	Mass Fraction List	mg / kg
mg_baseline_soil_mass_fraction_control	Magnesium mass fraction in control baseline soil	Mass Fraction List	mg / kg
mg_end_soil_mass_fraction	Magnesium mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
mg_end_soil_mass_fraction_control	Magnesium mass fraction in control soil at end of reporting period	Mass Fraction List	mg / kg
mg_feedstock_mass_fraction	Magnesium mass fraction in feedstock	Mass Fraction List	mg / kg
ocean_retention_factor	Ocean re-equilibration - percentage of CDR retained after losses	Percentage	%
plant_retention_factor	Plant uptake - percentage of CDR retained after losses	Percentage	%
river_retention_factor	River runoff - percentage of CDR retained after losses	Percentage	%
strong_acid_retention_factor	Strong acid weathering - percentage of CDR retained after losses	Percentage	%
tracer_baseline_soil_mass_fraction	Tracer mass fraction in soil before application	Mass Fraction List	mg / kg
tracer_end_soil_mass_fraction	Tracer mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
tracer_feedstock_mass_fraction	Tracer mass fraction in feedstock	Mass Fraction List	mg / kg

​

Enhanced weathering - immobile element tracer method with losses (february 2025)

key: iemt_with_losses_2025_02

CO₂ removed from weathering using the immobile element method described in Reershemius et al 2023, using Titanium as the tracer and assuming that the dissolved fraction of all cations is equal to that of Calcium. Accounts for losses from strong acids, plant uptake, and river and ocean networks. There is no explicit correction for data obtained from control plots.

Calculations

$\text{result} = \text{ExpectedValue}(co2\_sequestered \times strong\_acid\_retention\_factor \times plant\_retention\_factor \times river\_retention\_factor \times ocean\_retention\_factor)$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
ca_baseline_soil_mass_fraction	Baseline calcium mass fraction in soil	Mass Fraction	mg / kg
ca_end_soil_mass_fraction	Calcium mass fraction in soil at end of reporting period	Mass Fraction	mg / kg
ca_feedstock_mass_fraction	Calcium mass fraction in feedstock	Mass Fraction	mg / kg
cdr_potential	CDR potential of entire feedstock (Ca, Mg, Na & K cations)	Mass Cdr Potential	kgCO2e / tonne
feedstock_mass	Mass of feedstock	Mass	kg
ocean_retention_factor	Percentage of CDR retained after losses in ocean storage	Percentage	%
plant_retention_factor	Percentage of CDR retained after losses due to plant uptake	Percentage	%
river_retention_factor	Percentage of CDR retained after losses in river runoff	Percentage	%
strong_acid_retention_factor	Percentage of CDR retained after losses due to strong acid reactions	Percentage	%
ti_baseline_soil_mass_fraction	Titanium mass fraction in soil before application	Mass Fraction	mg / kg
ti_end_soil_mass_fraction	Titanium mass fraction in soil at end of reporting period	Mass Fraction	mg / kg
ti_feedstock_mass_fraction	Titanium mass fraction in feedstock	Mass Fraction	mg / kg

​

Off-platform sequestration

key: off_platform_sequestration

Constant sequestration representing a calculation that is done outside of the Isometric system. This blueprint should be used for testing sequestration values before we can represent them with a more detailed blueprint, and not for ‘production’ removal data.

Calculations

$\text{result} = off\_platform\_sequestration$

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
off_platform_sequestration	Off-platform sequestration	Mass Carbon	kgCO2e

​

Total plant uptake loss

key: ew_plant_uptake_from_sample

Calculates the plant uptake from a sample of locations

Calculations

$\text{result} = \left(co\_lost\_per\_unit\_area\_from\_calcium + co\_lost\_per\_unit\_area\_from\_magnesium\right) \times rock\_spread\_area$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
control_ca_concentration	Calcium concentration in control	Mass Fraction List	mg / kg
control_mg_concentration	Magnesium concentration in control	Mass Fraction List	mg / kg
control_sample_area	Control sample area	Area List	ha
control_sample_yield	Control sample yield	Mass List	kg
deployment_ca_concentration	Calcium concentration in deployment	Mass Fraction List	mg / kg
deployment_mg_concentration	Magnesium concentration in deployment	Mass Fraction List	mg / kg
deployment_sample_area	Deployment sample area	Area List	ha
deployment_sample_yield	Deployment sample yield	Mass List	kg
deployment_total_area	Deployment total area	Area List	ha
deployment_total_yield	Deployment total yield	Mass List	kg
rock_spread_area	Rock spread area	Area	ha

​

Two plot, unpaired single immobile tracer element

key: iemt_2025_04_two_plot_ca_mg_non_paired_single_tracer

CO₂ removed from weathering using the immobile element method described in Reershemius et al 2023, using an immobile tracer. Accounts for losses from strong acids, plant uptake, and river and ocean networks. Can accept multiple feedstock measurements for each element, and the mean will be used. Will also accept multiple soil measurements and take the average of the baseline and end of reporting period measurements for each element before performing the TiCAT calculation. This method allows us to use data where soil measurements are not taken at the same location in baseline and end of reporting period.

Calculations

$\text{result} = \text{ExpectedValue}(co2\_sequestered \times strong\_acid\_retention\_factor \times plant\_retention\_factor \times river\_retention\_factor \times ocean\_retention\_factor)$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
ca_baseline_soil_mass_fraction	Baseline calcium mass fraction in soil	Mass Fraction List	mg / kg
ca_baseline_soil_mass_fraction_control	Calcium mass fraction in control baseline soil	Mass Fraction List	mg / kg
ca_end_soil_mass_fraction	Calcium mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
ca_end_soil_mass_fraction_control	Calcium mass fraction in control soil at end of reporting period	Mass Fraction List	mg / kg
ca_feedstock_mass_fraction	Calcium mass fraction in feedstock	Mass Fraction List	mg / kg
feedstock_mass	Mass of feedstock	Mass	kg
mg_baseline_soil_mass_fraction	Baseline magnesium mass fraction in soil	Mass Fraction List	mg / kg
mg_baseline_soil_mass_fraction_control	Magnesium mass fraction in control baseline soil	Mass Fraction List	mg / kg
mg_end_soil_mass_fraction	Magnesium mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
mg_end_soil_mass_fraction_control	Magnesium mass fraction in control soil at end of reporting period	Mass Fraction List	mg / kg
mg_feedstock_mass_fraction	Magnesium mass fraction in feedstock	Mass Fraction List	mg / kg
ocean_retention_factor	Ocean re-equilibration - percentage of CDR retained after losses	Percentage	%
plant_retention_factor	Plant uptake - percentage of CDR retained after losses	Percentage	%
river_retention_factor	River runoff - percentage of CDR retained after losses	Percentage	%
strong_acid_retention_factor	Strong acid weathering - percentage of CDR retained after losses	Percentage	%
tracer_baseline_soil_mass_fraction	Tracer mass fraction in soil before application	Mass Fraction List	mg / kg
tracer_end_soil_mass_fraction	Tracer mass fraction in soil at end of reporting period	Mass Fraction List	mg / kg
tracer_feedstock_mass_fraction	Tracer mass fraction in feedstock	Mass Fraction List	mg / kg

​

Woody biomass sequestration

key: woody_biomass_sequestration

CO₂e stored in a reforestation project in aboveground and belowground woody biomass, determined by the difference in CO₂e stored between the start and end of the reporting period.

Calculations

$\text{result} = co2e\_stored\_t2 - co2e\_stored\_t1$

Show breakdown

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
mass_agb_t1	Total aboveground biomass, start of reporting period	Mass	kg
mass_agb_t2	Total aboveground biomass, end of reporting period	Mass	kg
mean_carbon_fraction	Mean carbon fraction	Dimensionless	dimensionless
root_shoot_ratio	Root to shoot ratio	Dimensionless	dimensionless

​

Uncertainty_Discount Component Blueprints

​

Constant CO₂ uncertainty discount

key: constant_uncertainty_discount

CO₂e discounted as a result of an off-platform calculation of input uncertainty, such as Monte Carlo simulations. This component should only be used if not using the in-built variance propagation method of uncertainty discounting.

Calculations

$\text{result} = constant\_uncertainty\_discount$

Monitored inputs

Input Key	Display Name	Quantity Kind	Example Unit
constant_uncertainty_discount	Constant CO₂ uncertainty discount	Mass Carbon	kgCO2e