The biogenic carbon footprint calculator implements a dynamic accounting approach that considers biogenic carbon in wood-based products. Compared to static accounting methods, dynamic accounting applies time-dependent characterization factors to biogenic carbon emissions and removals in a given year.
As such, the calculator calculates the biogenic carbon footprint by expanding on the concept of global warming potential of biogenic carbon (GWPbio), which takes into account forest carbon gaps (decreased carbon stocks in forests until regrowth occurs) and the benefits of storing carbon in products. The following carbon pools are accounted for in this calculator's methodology: carbon stored in above-ground biomass (AGB), below-ground biomass (BGB), dead organic matter (DOM), and soil organic carbon (SOC). Outputs are provided in kg CO2 equivalent.
The calculator does not take into account other aspects of forest biomass use (biodiversity, water, socioeconomic factors) other than biogenic emissions.
For more information about the methodology, please refer to the methodological report at worldwildlife.org/GWP-Methodology.