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CARBON CYCLE IN THE ARCTIC TERRESTRIAL ECOSYSTEMS IN RELATION TO THE CLOBAL WARMING
Author(s): 
Pages: 113-121
Year: Issue:  2
Journal: ACTA SCIENTIAE CIRCUMSTANTIAE

Keyword:  北极陆地生态系统碳循环全球温暖化CO2土壤碳库;
Abstract: 根据最新研究资料,综述并分析了全球温暖化与北极陆地生态系统碳循环的关系,指出近代全球大气CO2和CH4浓度显著增加,并呈现日益加剧的趋势;这些温室气体的浓度上升与全球温暖化密切相关,自本世纪70年代开始,北极地区的夏季温度显著上升.通过分析北极陆地生态系统的碳循环及其基本特征,发现北极陆地生态系统是一个巨大的土壤碳库,占全球土壤碳库总量的23.7%-32.3%;虽然该系统目前起着大气CO2汇的作用,但大气CO2浓度增加导致的气温上升将对北极土壤碳库和CO2的源汇功能产生深刻影响.
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