globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-15-0391.1
Scopus记录号: 2-s2.0-84966394764
论文题名:
Has arctic sea ice loss contributed to increased surface melting of the Greenland ice sheet?
作者: Liu J.; Chen Z.; Francis J.; Song M.; Mote T.; Hu Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期:9
起始页码: 3373
结束页码: 3386
语种: 英语
Scopus关键词: Feedback ; Glaciers ; Infrared radiation ; Melting ; Sea ice ; Sea level ; Atmospheric model ; Atmospheric model simulations ; Climate variability ; Contributing factor ; Greenland Ice Sheet ; Sea ice conditions ; Thermohaline circulations ; Variability ; Ice ; atmospheric modeling ; climate change ; glacier mass balance ; global warming ; ice sheet ; melting ; sea ice ; Arctic ; Greenland ; Greenland Ice Sheet
英文摘要: In recent decades, the Greenland ice sheet has experienced increased surface melt. However, the underlying cause of this increased surface melting and how it relates to cryospheric changes across the Arctic remain unclear. Here it is shown that an important contributing factor is the decreasing Arctic sea ice. Reduced summer sea ice favors stronger and more frequent occurrences of blocking-high pressure events over Greenland. Blocking highs enhance the transport of warm, moist air over Greenland, which increases downwelling infrared radiation, contributes to increased extreme heat events, and accounts for the majority of the observed warming trends. These findings are supported by analyses of observations and reanalysis data, as well as by independent atmospheric model simulations using a state-of-the-art atmospheric model that is forced by varying only the sea ice conditions. Reduced sea ice conditions in the model favor more extensive Greenland surface melting. The authors find a positive feedback between the variability in the extent of summer Arctic sea ice and melt area of the summer Greenland ice sheet, which affects the Greenland ice sheet mass balance. This linkage may improve the projections of changes in the global sea level and thermohaline circulation. © 2016 American Meteorological Society.
资助项目: NSF, Norsk Sykepleierforbund ; NSF, Norsk Sykepleierforbund
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49948
Appears in Collections:气候变化事实与影响

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作者单位: Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States; State Key Laboratory of Numerical Modeling for Atmospheric Sci. and Geophysical Fluid Dynamics, Beijing, China; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Department of Marine and Coastal Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States; Department of Geography, University of Georgia, Athens, GA, United States; Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China

Recommended Citation:
Liu J.,Chen Z.,Francis J.,et al. Has arctic sea ice loss contributed to increased surface melting of the Greenland ice sheet?[J]. Journal of Climate,2016-01-01,29(9)
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