DOI: 10.1007/s00382-015-2629-7
Scopus记录号: 2-s2.0-84957431167
论文题名: Fast atmospheric response to a sudden thinning of Arctic sea ice
作者: Semmler T. ; Jung T. ; Serrar S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-03-04 起始页码: 1015
结束页码: 1025
语种: 英语
英文关键词: Arctic boundary layer
; Arctic sea ice
; Atmospheric circulation
; Numerical modelling
英文摘要: In order to understand the influence of a thinner Arctic sea ice on the wintertime atmosphere, idealized ensemble experiments with increased sea ice surface temperature have been carried out with the Integrated Forecast System of the European Centre for Medium-Range Weather Forecasts. The focus is on the fast atmospheric response to a sudden “thinning” of Arctic sea ice to disentangle the role of various different processes. We found that boundary layer turbulence is the most important process that distributes anomalous heat vertically. Anomalous longwave radiation plays an important role within the first few days before temperatures in the lower troposphere had time to adjust. The dynamic response tends to balance that due to boundary layer turbulence while cloud processes and convection play only a minor role. Overall the response of the atmospheric large-scale circulation is relatively small with up to 2 hPa in the mean sea level pressure during the first 15 days; the quasi-equilibrium response reached in the second and third month of the integration is about twice as large. During the first few days the response tends to be baroclinic in the whole Arctic. Already after a few days an anti-cyclonic equivalent-barotropic response develops over north-western Siberia and north-eastern Europe. The structure resembles very much that of the atmospheric equilibrium response indicating that fast tropospheric processes such as fewer quasi-barotropic cyclones entering this continental area are key opposed to slower processes such as those involving, for example, stratosphere-troposphere interaction. © 2015, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53817
Appears in Collections: 过去全球变化的重建
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作者单位: Helmholtz Centre for Polar and Marine Research, Alfred Wegener Institute, Am Handelshafen 12, Bremerhaven, Germany; University of Bremen, Bremen, Germany
Recommended Citation:
Semmler T.,Jung T.,Serrar S.. Fast atmospheric response to a sudden thinning of Arctic sea ice[J]. Climate Dynamics,2016-01-01,46(2017-03-04)