Figure 3-6: Changes in carbon stock during the
first commitment period for each of the nine simulated cases of human activities
for aboveground (top), dead organic matter including soil (middle), and total
ecosystem (bottom) carbon. "Actual" illustrates simulated carbon stock change
in the landscape. The other bars represent carbon stock change reported for various
definitional scenarios: FAO, Forest Change [includes all scenarios requiring a
forest/non-forest conversion (i.e., IPCC, Land Use, Flexible, and Biome), Land
Cover, and Degradation/Aggradation (Deg/Agg). Missing bars indicate that no ARD
land was created. FAO opt 1 and 2 are the land-based accounting approaches I and
II, respectively, described in the text. The results for an activity-based accounting
approach used for the FAO scenario are similar to the results reported for FAO
opt 2, but reporting only the changes in aboveground biomass.
