研究论文
方精云,位梦华.北极陆地生态系统的碳循环与全球温暖化[J].环境科学学报,1998,18(2):113-121
北极陆地生态系统的碳循环与全球温暖化
- CARBON CYCLE IN THE ARCTIC TERRESTRIAL ECOSYSTEMS IN RELATION TO THE CLOBAL WARMING
- 基金项目：国家杰出青年科学基金
- 作者
- 单位
- 方精云
- 中国科学院生态环境研究中心, 北京 100085
- 位梦华
- 国家地震局地质研究所, 北京 100029
- 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浓度显着增加,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着上升。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。
- Abstract：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(CO2) and methane (CH4) 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 355×109tC, being 23.7%—32.3% of the global soil carbon pool.At present the ecosystem is a sink of atmospheric CO2.The global rise of air temperature resulting from an increase in atmospheric CO2 would influence markedly the Arctic soil carbon and CO2 source/sink relation of the ecosystems.
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