气候变化领域集成服务门户(CCPortal): Climate change and forest fires synergistically drive widespread melt events of the Greenland Ice Sheet

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DOI	10.1073/pnas.1405397111
	Climate change and forest fires synergistically drive widespread melt events of the Greenland Ice Sheet
	Keegan K.M.; Albert M.R.; McConnell J.R.; Baker I.
发表日期	2014
ISSN	0027-8424
起始页码	7964
结束页码	7967
卷号	111 期号:22
英文摘要	In July 2012, over 97% of the Greenland Ice Sheet experienced surface melt, the first widespread melt during the era of satellite remote sensing. Analysis of six Greenland shallow firn cores from the dry snow region confirms that the most recent prior widespread melt occurred in 1889. A firn core from the center of the ice sheet demonstrated that exceptionally warm temperatures combined with black carbon sediments from Northern Hemisphere forest fires reduced albedo below a critical threshold in the dry snow region, and caused the melting events in both 1889 and 2012. We use these data to project the frequency of widespread melt into the year 2100. Since Arctic temperatures and the frequency of forest fires are both expected to rise with climate change, our results suggest that widespread melt events on the Greenland Ice Sheet may begin to occur almost annually by the end of century. These events are likely to alter the surface mass balance of the ice sheet, leaving the surface susceptible to further melting.
语种	英语
scopus关键词	black carbon; fossil fuel; snow; Arctic; article; biomass; climate change; combustion; fire; forest fire; Greenland; high temperature; ice sheet; melting point; Northern Hemisphere; priority journal; remote sensing; sediment; summer; temperature; warm temperature; Arctic Regions; Carbon; Climate Change; Fires; Freezing; Global Warming; Greenland; Ice Cover; Snow; Trees
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158919
作者单位	Keegan, K.M., Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, United States; Albert, M.R., Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, United States; McConnell, J.R., Desert Research Institute, Nevada System of Higher Education, Reno, NV 89512, United States; Baker, I., Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, United States
推荐引用方式 GB/T 7714	Keegan K.M.,Albert M.R.,McConnell J.R.,et al. Climate change and forest fires synergistically drive widespread melt events of the Greenland Ice Sheet[J],2014,111(22).
APA	Keegan K.M.,Albert M.R.,McConnell J.R.,&Baker I..(2014).Climate change and forest fires synergistically drive widespread melt events of the Greenland Ice Sheet.Proceedings of the National Academy of Sciences of the United States of America,111(22).
MLA	Keegan K.M.,et al."Climate change and forest fires synergistically drive widespread melt events of the Greenland Ice Sheet".Proceedings of the National Academy of Sciences of the United States of America 111.22(2014).