DEVELOPMENT OF CARBON STORAGE MODEL FOR ABOVEGROUND VEGETATION IN CHINA

Aboveground vegetation is an important component of the terrestrial ecosystem carbon storage, with a significant role in maintaining the global carbon cycle and balance. At present, the estimation method of aboveground vegetation carbon storage was concerned by people. Based on the national data of major trees, forest sample plots and major crops, the carbon storage models of 13 species of tree and 9 types of stands were established through regression analysis, and the carbon storage factors of main crops per unit area was calculated, Moreover, the carbon storage of forest in China was estimated. The results of model fitting showed that the fitting determination coefficients (R-2) were all above 0.9. Evaluation indicators of five regression models were selected to conduct model verification. And the verification results showed that the variation range of total relative error (TRE) of tree regression model is -6.03 similar to 4.76%, and that of forest classification regression model is -3.24 similar to 7.43%. The China forest carbon storage calculated by regression model is 8.999 Pg, considering that forest inventory is carried out based on a certain degree of canopy density, so the error between the results 8.427 Pg of regression model and forest inventory is within the permit range. Therefore, the aboveground vegetation carbon storage models established in this study can be used to estimate the carbon storage of China's main vegetation types.