Estimating Carbon Sequestration of Beijing's Forests Based on TM Images and Forest Inventory Data

In local and global contexts of attempting to mitigate climate change,carbon sequestration by the world's forests is a focus of global climate change researches.Diameter-based aboveground biomass equations,biomass conversion and expansion factors and remote sensing models for estimating carbon storage were developed on the basis of data from the program "Beijing plant germplasm resources survey"(2007—2009),2005 Beijing forest inventory data(2004)and TM images acquired in 2009.Then carbon sequestered by Beijing's forests from 2011 to 2015 was estimated based on a pool-difference method used by IPCC(2006).Carbon stored by Beijing's forests in 2004 and 2009 were 5 240 490.8 tonnes carbon and 6 158 970.6 tonnes carbon(including above and belowground carbon storage),respectively,with mean carbon storage densities of 12.03tC/hm2 and 14.14tC/hm2.It was estimated that the carbon sequestration rate of Beijing's forests from 2004 to 2009 was 0.42tC/hm2·year and Beijing's forests in the whole study area will sequester 914 550.0 tonnes carbon from 2011 to 2015,with average carbon sequestered per year of 182 910.0 tonnes carbon.