The 1958-2009 Greenland ice sheet surface melt and the mid-tropospheric atmospheric circulation

被引：61

作者：

Fettweis, Xavier ^{[1
]}

Mabille, Georges ^{[1
]}

Erpicum, Michel ^{[1
]}

Nicolay, Samuel ^{[2
]}

Van den Broeke, Michiel ^{[3
]}

机构：

[1] Univ Liege, Climatol Lab, B-4000 Liege, Belgium

[2] Univ Liege, Inst Math, B-4000 Liege, Belgium

[3] Univ Utrecht, Inst Marine & Atmospher Res, Utrecht, Netherlands

来源：

CLIMATE DYNAMICS | 2011年 / 36卷 / 1-2期

关键词：

Greenland ice sheet; Surface melt; Circulation type classification; NORTH-ATLANTIC OSCILLATION; REGIONAL CLIMATE MODEL; MASS-BALANCE; RUNOFF; PRECIPITATION; TEMPERATURE; VARIABILITY;

D O I：

10.1007/s00382-010-0772-8

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

In order to assess the impact of the mid-tropospheric circulation over the Greenland ice sheet (GrIS) on surface melt, as simulated by the regional climate model MAR, an automatic Circulation type classification (CTC) based on 500 hPa geopotential height from reanalyses is developed. General circulation correlates significantly with the surface melt anomalies for the summers in the period 1958-2009. The record surface melt events observed during the summers of 2007-2009 are linked to the exceptional persistence of atmospheric circulations favouring warm air advection. The CTC emphasizes that summer 500 hPa circulation patterns have changed since the beginning of the 2000s; this process is partly responsible for the recent warming observed over the GrIS.

引用

页码：139 / 159

页数：21

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