The carbon budget of the northern cryosphere region
The carbon budget of the northern cryosphere region
复制标题
北部冰冻圈地区的碳预算
DOI：
10.1016/j.cosust.2010.05.003
复制
发表时间：
2010
影响因子：
7.2
通讯作者：
M. Heimann
中科院分区：
文献类型：
--
作者：
A. McGuire;R. Macdonald;E. Schuur;J. Harden;P. Kuhry;D. Hayes;T. Christensen;M. Heimann
北部冰冻圈正在经历永久冻土的大幅变暖和海冰的消失。为应对这种变化而将储存的碳释放到大气中可能会影响全球气候系统。研究表明，近几十年来，北方冰冻圈不仅是大气二氧化碳的重要汇，而且由于湿地和湖泊的排放，也是甲烷的重要来源。分析表明，该地区21世纪碳循环的敏感性可能很大，但不确定性很高，因为许多响应途径都会受到变暖的影响。进一步的研究应集中于碳循环的敏感要素，例如北部冰冻圈地区火灾干扰增加、永久冻土退化和海冰消失的后果。
The northern cryosphere is undergoing substantial warming of permafrost and loss of sea ice. Release of stored carbon to the atmosphere in response to this change has the potential to affect the global climate system. Studies indicate that the northern cryosphere has been not only a substantial sink for atmospheric CO2in recent decades, but also an important source of CH4because of emissions from wetlands and lakes. Analyses suggest that the sensitivity of the carbon cycle of the region over the 21st Century is potentially large, but highly uncertain because numerous pathways of response will be affected by warming. Further research should focus on sensitive elements of the carbon cycle such as the consequences of increased fire disturbance, permafrost degradation, and sea ice loss in the northern cryosphere region.