摘要
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２３７％—３２３％；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．
The relationship between the global warming and carbon cycle in the Arctic terrestrial ecosystems was discussed by analyzing results presented in the latest literature.The results showed that atmospheric carbon dioxide(CO 2) and methane (CH 4) concentrations increased markedly during the past few centuries.The increase in the concentrations of these greenhouse gases was coupled with the global warming.Summer temperature in the Arctic regions showed a rapid rise.Soil in The Arctic is a huge organic carbon pool,with a mean estimate of 355×10 9tC,being 23 7%—32 3% of the global soil carbon pool.At present the ecosystem is a sink of atmospheric CO 2.The global rise of air temperature resulting from an increase in atmospheric CO 2 would influence markedly the Arctic soil carbon and CO 2 source/sink relation of the ecosystems.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1998年第2期113-121,共9页
Acta Scientiae Circumstantiae
基金
国家杰出青年科学基金
关键词
北极
陆地生态系统
碳循环
全球温暖化
Arctic terrestrial ecosystem, carbon cycle, global warming, soil carbon pool.
