globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1915258116
论文题名:
Unraveling driving forces explaining significant reduction in satellite-inferred Arctic surface albedo since the 1980s
作者: Zhang R.; Wang H.; Fu Q.; Rasch P.J.; Wang X.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期:48
起始页码: 23947
结束页码: 23953
语种: 英语
英文关键词: Albedo reduction ; Arctic amplification ; Sea ice ; Snow cover ; Soot
Scopus关键词: air temperature ; albedo ; Arctic ; article ; heating ; ice cover ; precipitation ; sea ice ; snow cover ; soot ; spring ; summer
英文摘要: The Arctic has warmed significantly since the early 1980s and much of this warming can be attributed to the surface albedo feedback. In this study, satellite observations reveal a 1.25 to 1.51% per decade absolute reduction in the Arctic mean surface albedo in spring and summer during 1982 to 2014. Results from a global model and reanalysis data are used to unravel the causes of this albedo reduction. We find that reductions of terrestrial snow cover, snow cover fraction over sea ice, and sea ice extent appear to contribute equally to the Arctic albedo decline. We show that the decrease in snow cover fraction is primarily driven by the increase in surface air temperature, followed by declining snowfall. Although the total precipitation has increased as the Arctic warms, Arctic snowfall is reduced substantially in all analyzed data sets. Light-absorbing soot in snow has been decreasing in past decades over the Arctic, indicating that soot heating has not been the driver of changes in the Arctic snow cover, ice cover, and surface albedo since the 1980s. © 2019 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163514
Appears in Collections:气候变化与战略

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作者单位: Zhang, R., Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Wang, H., Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Fu, Q., Department of Atmospheric Sciences, University of Washington, Seattle, WA 98195, United States; Rasch, P.J., Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Wang, X., Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin-Madison, Madison, WI 53706, United States

Recommended Citation:
Zhang R.,Wang H.,Fu Q.,et al. Unraveling driving forces explaining significant reduction in satellite-inferred Arctic surface albedo since the 1980s[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(48)
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