Distribution and dynamics of carbon storage and carbon density were examined in forest vegetation in Hunan Province of China,based on four forest inventories during 1983—2009( 1983—1987,1990—1995,2003—2004,and2009). Inventory data consisted of biomass expansion factors and carbon concentration of existing forest types in this region.The results showed that the arboreal forests were carbon sinks with a value of 66. 40 × 10~6 t C from 1987 to 2009. The highest carbon sink was in broad-leaved forests( 48.43×10...