Terrestrial vegetation carbon sinks in China,1981―2000  

作　　者：FANG JingYun GUO ZhaoDi PIAO ShiLong CHEN AnPing 

机构地区：[1]Department of Ecology,College of Environmental Science,and Key Laboratory for Earth Surface Processes of the Ministry of Education,Peking University,Beijing 100871,China

出　　处：《Science China Earth Sciences》2007年第9期1341-1350,共10页中国科学(地球科学英文版)

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.90211016,40638039,40228001,and 40021101);the Key MOE Research Project(Grant No.306019)

摘　　要：Using China's ground observations,e.g.,forest inventory,grassland resource,agricultural statistics,climate,and satellite data,we estimate terrestrial vegetation carbon sinks for China's major biomes between 1981 and 2000.The main results are in the following:(1)Forest area and forest biomass car-bon(C)stock increased from 116.5×10^(6) ha and 4.3 Pg C(1 Pg C=10^(15) g C)in the early 1980s to 142.8×10^(6) ha and 5.9 Pg C in the early 2000s,respectively.Forest biomass carbon density increased form 36.9 Mg C/ha(1 Mg C=10^(6) g C)to 41.0 Mg C/ha,with an annual carbon sequestration rate of 0.075 Pg C/a.Grassland,shrub,and crop biomass sequestrate carbon at annual rates of 0.007 Pg C/a,0.014―0.024 Pg C/a,and 0.0125―0.0143 Pg C/a,respectively.(2)The total terrestrial vegetation C sink in China is in a range of 0.096―0.106 Pg C/a between 1981 and 2000,accounting for 14.6%―16.1%of carbon dioxide(CO_(2))emitted by China's industry in the same period.In addition,soil carbon sink is estimated at 0.04―0.07 Pg C/a.Accordingly,carbon sequestration by China's terrestrial ecosystems(vegetation and soil)offsets 20.8%―26.8%of its industrial CO_(2) emission for the study period.(3)Considerable uncertainties exist in the present study,especially in the estimation of soil carbon sinks,and need further intensive investigation in the future.

关 键 词：carbon sink China CROPS FORESTS grasslands SHRUBS SOILS terrestrial ecosystems 

分 类 号：N[自然科学总论]