中国森林火灾释放的CO_2、CO和CH_4研究

CO_2,CO AND CH_4 EMISSIONS FROM FOREST FIRES IN CHINA

在对各省火灾统计资料和生物量估计的数据基础上 ,用排放因子法和排放比法 ,得出中国森林火灾释放的CO2 、CO和CH4 年平均分别为 8 96TgC/a、1 1 2TgC/a和 0 1 0 9TgC/a,其中林下植物和地表枯落物的贡献分别为 39%、4 7%和 4 0 %。各省年平均森林火灾释放的CO2 、CO和CH4 量主要是由火灾受害面积决定的 ,森林火灾较多的黑龙江、云南和内蒙古的这 3种气体的排放量占全国的 80 %以上。森林火灾释放的CO2 和CH4 分别为全国所有源排放的 1 2 %和 0 35%。中国年平均森林火灾释放的CO2 、CO和CH4 量分别为全球森林火灾排放量的 0 3 %、0 5%和 0 0 1 %。

Based on the data of forest fire accounting and biomass estimation for every province,and employed emission factor method and emission ratio method,we estimated the amount of CO 2、CO and CH 4 released from forest fires to be 8.96*!Tg C/a、1.12*!Tg C/a and 0.109*!Tg C/a,of which the components of undergrowth and litter contributed 39*!%,47*!% and 40*!%,respectively.For each province,the amounts of CO 2,CO and CH\-4 emission were dominantly determined by fire area.The contribution from Heilongjiang,Yunnan and Neimenggu provinces were more than 80*!% where fire occurred very frequently.CO\-2 and CH\-4 emissions from forest fire accounted for only 1.2*!% and 0.35*!% of total national emissions,respectively.CO\-2,CO and CH\-4 emissions from froest fire in China were 0.3*!%,0.5*!% and 0.01*!% of global emission from forest fires.