An Introduction to Carbon Modelling .ppt

Joanneum Research Woodrising Consulting Inc. An Introduction to Carbon Modelling Developing Forestry and Bioenergy Projects within CDM Quito, EcuadorMarch, 2004 Overview Definitions Reasons for Modelling System Boundaries Introduction to Carbon Flows Generalized Biomass Equations Non-Biomass LULUCF Emissions Energy Emissions Input Parameters Sensitivity Analysis Inverse Modelling Definitions Volume m3 Merchantable or total Biomass t Carbon tC 50% of dry biomass Carbon Dioxide Equivalence tCO2e Carbon x 44/12 Definitions Pool, Stock Stock Change biomass tC Emissions by Sources Removals by Sinks Fluxes Reasons for Modelling Forecast of Sequestration Estimation of Baseline Effects of Management Sensitivity Analysis Selection of Pools to Monitor Estimation between Measurements Calibration to Carbon Measurements Fine tuning of parameters System Boundaries Spatial Boundary The “project boundary” geographically delineates the afforestation or reforestation project activity under the control of the project participants. The project activity may contain more than one discrete area of land. Models, full life-cycle Temporal Boundary CDM 30 years, or 3 times 20 years Models, full life-cycle The Carbon Cycle Above Ground Tree Biomass Volume, V t Growth and yield tables Merchantable volume Expansion, e t 1.2 e 4.2 Measurements Tree components CO2FIX Density, r t Yield Curve Example Root Biomass Total Root Biomass, R t 0.2 ? 0.5 Fine Root Biomass, r t Litter Biomass Litter, L By pool, p Litter Input, LI Portion of biomass, ? Litter Decomposition, LD Proportional to litter biomass Dependant on quality, precipitation, temperature Litter Decomposition Rate Root Litter Biomass Root Litter, RL By pool, p Root Litter Input, RI Portion of root biomass, ? Root Decomposition, RD Proportional to root biomass Exponential decay Soil Biomass Soil, S Soil Input, SI Portion of decomposing litterand root litter Soil Decomposition, SD Exponential decay Wood Products