DOI: 10.1007/s00382-011-1272-1
Scopus记录号: 2-s2.0-84868686669
论文题名: Boundary layer stability and Arctic climate change: A feedback study using EC-Earth
作者: Bintanja R. ; van der Linden E.C. ; Hazeleger W.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 11 起始页码: 2659
结束页码: 2673
语种: 英语
英文关键词: Arctic amplification
; Arctic warming
; Boundary-layer inversion
; Climate change
; Climate feedback
; Climate sensitivity
英文摘要: Amplified Arctic warming is one of the key features of climate change. It is evident in observations as well as in climate model simulations. Usually referred to as Arctic amplification, it is generally recognized that the surface albedo feedback governs the response. However, a number of feedback mechanisms play a role in AA, of which those related to the prevalent near-surface inversion have received relatively little attention. Here we investigate the role of the near-surface thermal inversion, which is caused by radiative surface cooling in autumn and winter, on Arctic warming. We employ idealized climate change experiments using the climate model EC-Earth together with ERA-Interim reanalysis data to show that boundary-layer mixing governs the efficiency by which the surface warming signal is 'diluted' to higher levels. Reduced vertical mixing, as in the stably stratified inversion layer in Arctic winter, thus amplifies surface warming. Modelling results suggest that both shortwave-through the (seasonal) interaction with the sea ice feedback-and longwave feedbacks are affected by boundary-layer mixing, both in the Arctic and globally, with the effect on the shortwave feedback dominating. The amplifying effect will decrease, however, with climate warming because the surface inversion becomes progressively weaker. We estimate that the reduced Arctic inversion has slowed down global warming by about 5% over the past 2 decades, and we anticipate that it will continue to do so with ongoing Arctic warming. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55419
Appears in Collections: 过去全球变化的重建
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作者单位: Royal Netherlands Meteorological Institute (KNMI), Wilhelminalaan 10, 3732 GK De Bilt, Netherlands
Recommended Citation:
Bintanja R.,van der Linden E.C.,Hazeleger W.. Boundary layer stability and Arctic climate change: A feedback study using EC-Earth[J]. Climate Dynamics,2012-01-01,39(11)