Deforestation Carbon Loss & Land-Use Change (LULUCF

Forest Ecology & Climate Science: Land-Use Change Carbon Stocks

Forests act as the Earth's primary terrestrial carbon sink, holding more carbon in living biomass and soil than the entire atmosphere:

• The 3 Terrestrial Carbon Pools (IPCC):

• Aboveground Biomass (AGB): Trunks, branches, foliage, and bark (typically ~50% elemental carbon by dry weight).

• Belowground Biomass (BGB): Live coarse and fine root networks (typically 20% to 25% of aboveground biomass).

• Soil Organic Carbon (SOC): Decayed humus and microbial matter stored in the top 1 meter of soil.

• The 44/12 Stoichiometric Multiplier: When wood burns or decomposes, each atom of elemental carbon (atomic weight 12) bonds with two atoms of atmospheric oxygen (atomic weight 16) to form CO_2 (molecular weight 44); multiplying carbon mass by \ yields the true mass of CO_2 emitted.

• Soil Carbon Mineralization: When forest canopies are cleared for agriculture, exposed soil experiences elevated temperatures and tilling, accelerating microbial decomposition and releasing 25% to 50% of ancient soil carbon within 5 to 10 years.

How to Use This Calculator

Enter your Deforested Land Area (Hectares) (e.g. 250 (1 Hectare = 2.471 Acres)), Forest Biome & Baseline Carbon Stock (IPCC Tier 1) — choose from Tropical Moist Rainforest (265 t C/ha: 150 AGB + 35 BGB + 80 Soil), Temperate Deciduous Forest (210 t C/ha: 95 AGB + 25 BGB + 90 Soil), Boreal Coniferous / Taiga (245 t C/ha: 45 AGB + 20 BGB + 180 Soil), Post-Clearing Land-Use Conversion — choose from Cattle Pasture (95% Biomass Loss + 30% Soil Carbon Loss), Oil Palm / Monoculture (75% Biomass Loss + 25% Soil Loss), Intensive Row Cropland (95% Biomass Loss + 40% Soil Loss), and Social Cost of Carbon / Damage Penalty (/tCO2e) (e.g. 50 (EPA central estimate: 50 to 190/tCO2)). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

IPCC Good Practice Guidance for LULUCF \& Carbon Stock Accounting equations:

Biomass Carbon Loss (t C/ha) = (AGB + BGB) × f_biomass loss

Soil Carbon Loss (t C/ha) = SOC × f_soil loss

Total Elemental Carbon Lost (t C) = Area (ha) × (Biomass Loss + Soil Loss)

Total CO_2e Released (Metric Tonnes) = Total Carbon Lost (t C) × ((44) / (12))

Economic Damage (\) = Total tCO_2e × Social Cost of Carbon (\/t)

Worked Example

For example, clearing 250 hectares of tropical rainforest) for cattle pasture (95\% biomass loss, 30\% soil loss) with a Biomass loss is . Soil loss is . Total carbon lost is \ = 49,937.5 Tonnes C. Converting to CO_2e yields destroying 1,625 tCO2/year in future sequestration and causing \9.155M in social climate damages.

Understanding Your Result

Automotive benchmarks for reference: engine displacement affects power density (target 100+ hp/liter for performance), power-to-weight ratio above 0.1 hp/lb is considered sporty. Tire sizing: the middle number (e.g., 60 in 225/60R17) is the aspect ratio — lower numbers indicate sportier, wider tires with less cushioning. Braking distance from 60 mph: average car 120–140 ft on dry pavement; wet roads add 40–60%. Fuel efficiency varies significantly by driving style — aggressive acceleration and braking can reduce MPG by 15–30%.