Average estimates of forest biomass carbon storage (TgC) utilizing three calculation methods for equation parameters based on data from 2nd–8th National Forest Inventories.

MBM: mean biomass density method; MRM: mean ratio method; CBM: continuous biomass expansion factor method.*: Values derived from regional average approaches were not included. No published studies utilized the MBM method for a regional approach.**: Average of FBC totals for forest groups and forest groups with age class approaches.Capital letters indicate significant differences in column values for published approaches; small letters indicate significant differences in column values for approaches designed in this study.