Changes in the African monsoon region at medium-term time horizon using 12 AR4 coupled models under the A1b emissions scenario

被引：36

作者：

Fontaine, Bernard ^{[1
]}

Roucou, Pascal ^{[1
]}

Monerie, Paul-Arthur ^{[1
]}

机构：

[1] Univ Burgundy, Ctr Rech Climatol, CNRS, UMR5210, Dijon, France

来源：

ATMOSPHERIC SCIENCE LETTERS | 2011年 / 12卷 / 01期

关键词：

African monsoon; climate change; precipitation; West Africa; CLIMATE-CHANGE; SAHEL RAINFALL; 20TH-CENTURY; VARIABILITY; NORTHERN; SST;

D O I：

10.1002/asl.321

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

This study documents simulated precipitation and circulation changes through the 20C3M and A1b scenarios. It portrays a robust pattern, associating rainfall deficits in subtropical regions with rainfall excesses over West Africa, except in Northern Senegal and Mauritania, with a significant enhancement of both the April-June rainy season in 10/12 models and of the July-September rainy season in 8/12 models. Eastward to 5 degrees W a northward shift in the latitude of the moisture flux convergence at 850 hPa is evident in 10/11 models (+0.58 degrees in mean) and a southward shift in 6/11 models in the western region (-0.24 degrees) is observed. Copyright (C) 2011 Royal Meteorological Society

引用

页码：83 / 88

页数：6

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