DOI: 10.5194/tc-8-1871-2014
Scopus记录号: 2-s2.0-84908100954
论文题名: Sensitivity of Greenland Ice Sheet surface mass balance to perturbations in sea surface temperature and sea ice cover: A study with the regional climate model MAR
作者: Noël B ; , Fettweis X ; , Van De Berg W ; J ; , Van Den Broeke M ; R ; , Erpicum M
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期: 5 起始页码: 1871
结束页码: 1883
语种: 英语
英文关键词: coastal zone
; environmental conditions
; ice cover
; ice sheet
; katabatic flow
; mass balance
; North Atlantic Oscillation
; regional climate
; sea ice
; sea surface temperature
; Arctic
; Atlantic Ocean
; Atlantic Ocean (North)
; Greenland
英文摘要: During recent summers (2007-2012), several surface melt records were broken over the Greenland Ice Sheet (GrIS). The extreme summer melt resulted in part from a persistent negative phase of the North Atlantic Oscillation (NAO), favoring warmer atmospheric conditions than normal over the GrIS. Simultaneously, large anomalies in sea ice cover (SIC) and sea surface temperature (SST) were observed in the North Atlantic, suggesting a possible connection. To assess the direct impact of 2007-2012 SIC and SST anomalies on GrIS surface mass balance (SMB), a set of sensitivity experiments was carried out with the regional climate model MAR forced by ERA-Interim. These simulations suggest that perturbations in SST and SIC in the seas surrounding Greenland do not considerably impact GrIS SMB, as a result of the katabatic wind blocking effect. These offshore-directed winds prevent oceanic near-surface air, influenced by SIC and SST anomalies, from penetrating far inland. Therefore, the ice sheet SMB response is restricted to coastal regions, where katabatic winds cease. A topic for further investigation is how anomalies in SIC and SST might have indirectly affected the surface melt by changing the general circulation in the North Atlantic region, hence favoring more frequent warm air advection towards the GrIS. © 2014 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74778
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Geography, University of Liège, Liège, Belgium; Institute for Marine and Atmospheric Research Utrecht, University of Utrecht, Utrecht, Netherlands
Recommended Citation:
Noël B,, Fettweis X,, Van De Berg W,et al. Sensitivity of Greenland Ice Sheet surface mass balance to perturbations in sea surface temperature and sea ice cover: A study with the regional climate model MAR[J]. Cryosphere,2014-01-01,8(5)