DOI: 10.1002/joc.5187
论文题名: Dust induced changes on the West African summer monsoon features
作者: N'Datchoh E.T. ; Diallo I. ; Konaré A. ; Silué S. ; Ogunjobi K.O. ; Diedhiou A. ; Doumbia M.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 1 起始页码: 452
结束页码: 466
语种: 英语
英文关键词: dust
; impacts
; RegCM4
; West African monsoon
Scopus关键词: Atmospheric aerosols
; Atmospheric movements
; Atmospheric thermodynamics
; Climate change
; Dust
; Oceanography
; Optical correlation
; Surface waters
; Aerosol optical depths
; African easterly jet
; impacts
; RegCM4
; Sea surface temperature (SST)
; Temperature structure
; Tropical easterly jets
; West African Monsoon
; Fighter aircraft
; aerosol
; airflow
; climate forcing
; climate modeling
; correlation
; dust
; easterly wave
; jet flow
; monsoon
; optical depth
; regional climate
; sea surface temperature
; Atlantic Ocean
; West Africa
英文摘要: Dust generation and transportation from North Africa are thought to modulate the West African Monsoon (WAM) features. In this study, we investigated the relationship between the Saharan Air Layer located above Atlantic Ocean (OSAL) and WAM features, including Monsoon flow, African Easterly Jet (AEJ) and Tropical Easterly Jet (TEJ) over West Africa using the RegCM4 regional model at 30 km grid resolution. Two sets of experiments with and without dust load were performed between 2007 and 2013 over the simulation domain, encompassing the whole of West Africa and a large part of the adjacent Atlantic Ocean. An intercomparison of the two simulations shows that dust load into the atmosphere greatly influences both the wind and temperature structure at different levels, resulting in the observed changes in the main features of the WAM system during summer. These changes lead to a westward shift with a slight strengthening of AEJ core over tropical Atlantic and weakening of both TEJ and monsoon flux penetration over land. In addition, despite running the RegCM4 with prescribed sea surface temperature, a correlation has been found between Aerosol Optical Depths in OSAL and WAM dynamics suggesting a mechanistic link between dust and WAM well reproduced by RegCM4. © 2017 The Authors. International Journal of Climatology published by John Wiley & Sons Ltd on behalf of the Royal Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117147
Appears in Collections: 气候减缓与适应
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作者单位: Laboratoire de Physique de l'Atmospheŕe, Université Felix Houphouët Boigny, Abidjan, Cote d'Ivoire; WASCAL, Department of Meteorology, Federal University of Technology, Akure, Nigeria; Department of Geography, University of California, Los Angeles, CA, United States; Université Peleforo Gon Coulibaly de Korhogo, Cote d'Ivoire; Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble, France; Institute of Engineering Université Grenoble Alpes, France
Recommended Citation:
N'Datchoh E.T.,Diallo I.,Konaré A.,et al. Dust induced changes on the West African summer monsoon features[J]. International Journal of Climatology,2018-01-01,38(1)