Section 47 - Carbon Credits (Carbon Farming Initiative—Plantation Forestry) Methodology Determination 2022 - Calculating net carbon stock in a CEA at the end of reporting period | Zoe
47Calculating net carbon stock in a CEA at the end of reporting period
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47 Calculating net carbon stock in a CEA at the end of reporting period
Carbon stock in ith CEA at end of reporting period—new plantation CEA
(1) If the ith CEA is a new plantation CEA, its carbon dioxide equivalent carbon stock at the end of the reporting period (CP,i) (in tonnes CO2‑e) is calculated using the following equation:
View image in the official source is the C mass in forest debris (in tonnes C per hectare) for the ith CEA in the last month of the reporting period—from the project scenario simulation.
View image in the official source is the C mass of trees (in tonnes C per hectare) for the ith CEA in the last month of the reporting period—from the project scenario simulation.
Carbon stock in ith CEA at end of reporting period—conversion CEA, permanent planting (environmental) CEA or continuing plantation CEA
(2) If the ith CEA is a conversion CEA, continuing plantation CEA or a permanent planting (environmental) CEA, its carbon dioxide equivalent carbon stock at the end of the reporting period (CP,i) (in tonnes CO2‑e) is calculated using the following equation:
(a) if the ith CEA is a conversion CEA or a continuing plantation CEA—the predicted long-term average project carbon stock for the modelling period for the ith CEA—from equation 8; and
(b) if the ith CEA is a permanent planting (environmental) CEA—the predicted long-term project scenario carbon stock for the modelling period for the ith CEA—from equation 9.
Note: Essentially, the effect of this equation is to credit the proponent with 1/15 of the expected increase in the quantity of sequestered carbon in the CEA in each of the first 15 years of the project. This increase is averaged for conversion and continuing plantation CEAs, and based on carbon stocks at the end of the reporting period for ex-plantation CEAs. In practice, the amounts credited are likely to vary slightly from one reporting period to the next because View image in the official source and View image in the official source are re-calculated for each reporting period, and the scenarios used in the calculations are modified to reflect events that occurred during the reporting period. This recalculation may continue to produce adjustments after the initial period of 15 years. The calculation is done monthly to facilitate reporting more frequently than yearly.
Carbon stock in ith CEA at end of reporting period—remnant plantation CEA or permanent planting (ex-commercial) CEA
(3) If the ith CEA is a remnant plantation CEA or a permanent planting (ex-commercial) CEA, its carbon dioxide equivalent carbon stock at the end of the reporting period (CP,i) (in tonnes CO2‑e) is calculated using the following equation:
(a) for a 25-year permanence period project—0.75; and
(b) for a 100-year permanence period project—1.
Note: Essentially, the effect of this equation is to credit the proponent with 1/15 of the expected increase in the quantity of sequestered carbon in the CEA in each of the first 15 years of the project. This increase is based on carbon stocks at the end of the modelling period for ex-plantation CEAs. In practice, the amounts credited are likely to vary slightly from one reporting period to the next because View image in the official source and View image in the official source are re-calculated for each reporting period, and the scenarios used in the calculations are modified to reflect events that occurred during the reporting period. This recalculation may continue to produce adjustments after the initial period of 15 years. The calculation is done on a monthly basis to facilitate reporting more frequently than yearly.
Emissions from biomass burning for ith CEA at end of reporting period
(4) The emissions from biomass burning for the ith CEA at the end of the reporting period (EP,Fire,i) (in tonnes CO2‑e) is calculated using the following equation:
(b) otherwise—the mass of greenhouse gas View image in the official source per unit area (in tonnes per hectare) emitted due to biomass burning in the ith CEA in the kth month since the modelling start date from the project scenario simulation.
Emissions from fuel used to harvest at end of reporting period
(5) The fuel emissions for the project for the ith CEA for the modelling period (EP,Fuel,i) (in tonnes CO2‑e) are calculated using the following equation:
(b) otherwise—the predicted C mass of forest products from harvest event h in the modelling period in the ith CEA (in tonnes C per hectare)—from equation 19.
(6) For the definition of CHarv,i,h in subsection (5), the equation is:
CFP,i,k is the mass of forest products (in tonnes C per hectare) for the ith CEA and for the kth month—from the project scenario simulation.
CFP,i,k – 1 is:
(a) for the first month since the modelling start date (k = 1)—zero; and
(b) for subsequent months (k 2)—the mass of forest products (in tonnes C per hectare) for the ith CEA and for the (k – 1)th month since the start of the modelling period—from the project scenario simulation.