GSTDTAP  > 气候变化
DOI10.1029/2019GL084872
Sahelian Precipitation Change Induced by SST Increase: The Contrasting Roles of Regional and Larger-Scale Drivers
Dixon, Ross D.1,2; Peyrille, Philippe1,2; Guichard, Francoise1,2
2019-10-23
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2019
文章类型Article;Early Access
语种英语
国家France
英文摘要

Representing the West African Monsoon is a major challenge in climate modeling because of complex mechanisms of interaction across scales. We study the monsoon precipitation response to a 4K increase in sea surface temperatures using an idealized meridional-vertical (2D) model, which allows separating regional- and larger-scale influences. The 2D simulations reproduce key features of Atmospheric Model Intercomparison Project simulations and indicate that, in response to sea surface temperature increase, large-scale changes induce a decrease of Sahel precipitation, while regional-scale mechanisms generate a southward shift of the rainband. Large-scale changes moisten and warm the free troposphere, while regional circulation changes increase low-level moisture. Precipitation in the control simulations accounts for much of the variance in precipitation change for both Atmospheric Model Intercomparison Project and 2D simulations. This response is strongly connected to the large-scale drivers of temperature and moisture, with an additional spread associated with the formulation of the convective parameterization.


英文关键词West Africa monsoon climate change Sahel precipitation modeling
领域气候变化
收录类别SCI-E
WOS记录号WOS:000491923500001
WOS关键词WEST-AFRICAN MONSOON ; IDEALIZED 2-DIMENSIONAL FRAMEWORK ; RAINFALL ; VARIABILITY ; CIRCULATION ; PROJECTIONS ; CMIP5 ; MODEL ; KEY
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/187764
专题气候变化
作者单位1.Ctr Natl Rech Meteorol, CNRS, UMR 3589, Toulouse, France;
2.Meteo France, Toulouse, France
推荐引用方式
GB/T 7714
Dixon, Ross D.,Peyrille, Philippe,Guichard, Francoise. Sahelian Precipitation Change Induced by SST Increase: The Contrasting Roles of Regional and Larger-Scale Drivers[J]. GEOPHYSICAL RESEARCH LETTERS,2019.
APA Dixon, Ross D.,Peyrille, Philippe,&Guichard, Francoise.(2019).Sahelian Precipitation Change Induced by SST Increase: The Contrasting Roles of Regional and Larger-Scale Drivers.GEOPHYSICAL RESEARCH LETTERS.
MLA Dixon, Ross D.,et al."Sahelian Precipitation Change Induced by SST Increase: The Contrasting Roles of Regional and Larger-Scale Drivers".GEOPHYSICAL RESEARCH LETTERS (2019).
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