globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016MS000728
Scopus ID: 2-s2.0-85018193135
Examining the West African Monsoon circulation response to atmospheric heating in a GCM dynamical core
Author: Chadwick R; , Martin G; M; , Copsey D; , Bellon G; , Caian M; , Codron F; , Rio C; , Roehrig R
Source Publication: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
Publishing Year: 2017
Volume: 9, Issue:1
pages begin: 149
pages end: 167
Language: 英语
Keyword: Atmospheric aerosols ; Heating ; Diabatic heating ; Dynamical core ; General circulation model ; Monsoon circulations ; On-going model development ; Short wave absorption ; Tropical easterly jets ; West African Monsoon ; Atmospheric thermodynamics ; albedo ; atmospheric circulation ; atmospheric modeling ; diabatic process ; easterly wave ; general circulation model ; heating ; jet ; monsoon ; Sahara ; Sahel [Sub-Saharan Africa]
English Abstract: Diabatic heating plays a crucial role in the formation and maintenance of the West African Monsoon. A dynamical core configuration of a General Circulation Model (GCM) is used to test the influence of diabatic heating from different sources and regions on the strength and northward penetration of the monsoon circulation. The dynamical core is able to capture the main features of the monsoon flow, and when forced with heating tendencies from various different GCMs it recreates many of the differences seen between the full GCM monsoon circulations. Differences in atmospheric short-wave absorption over the Sahara and Sahel regions are a key driver of variation in the models' monsoon circulations, and this is likely to be linked to how aerosols, clouds and surface albedo are represented across the models. The magnitude of short-wave absorption also appears to affect the strength and position of the African easterly jet (AEJ), but not that of the tropical easterly jet (TEJ). The dynamical core is also used here to understand circulation changes that occur during the ongoing model development process that occurs at each modeling centre, providing the potential to trace these changes to specific alterations in model physics. © 2016. The Authors.
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Document Type: 期刊论文
Appears in Collections:影响、适应和脆弱性

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Affiliation: Met Office, Exeter, United Kingdom; Laboratoire de Météorologie Dynamique, Institut Pierre-Simon Laplace, Paris, France; Now at Department of Physics, University of Auckland, New Zealand; Swedish Meteorological and Hydrological Institute, Norrköping, Sweden; Centre National de Recherches Météorologiques, Météo-France, Toulouse, France

Recommended Citation:
Chadwick R,, Martin G,M,et al. Examining the West African Monsoon circulation response to atmospheric heating in a GCM dynamical core[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(1)
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