干旱区生态环境知识资源中心(Arid): Dynamic and thermodynamic factors controlling increasing summer monsoon rainfall over the West African Sahel

Arid

DOI	10.1007/s00382-018-4394-x
	Dynamic and thermodynamic factors controlling increasing summer monsoon rainfall over the West African Sahel
	Akinsanola, A. A.; Zhou, Wen
通讯作者	Zhou, Wen
来源期刊	CLIMATE DYNAMICS
ISSN	0930-7575
EISSN	1432-0894
出版年	2019
卷号	52 期号:7-8 页码:4501-4514
英文摘要	The central-eastern Sahel (CES) subregion of West Africa has experienced a significant increasing trend in summer monsoon rainfall during 1980-2012, but the reasons remain unclear. In this study, we employ a moisture budget analysis to assess the controlling mechanisms and to quantify the contributions of different factors to this increasing trend. Results reveal that the majority of the increasing rainfall over the CES is balanced by increased vertical moisture advection. We further decompose the vertical moisture advection term into dynamic, thermodynamic, and nonlinear components. The dynamic component exhibits the largest contribution to the trend, followed by the thermodynamic component. These components are modulated by strong convergence in the middle and lower troposphere and increased near-surface specific humidity from a remote source. Diagnosing changes in vertical moisture advection against the background of global warming deserves more attention when projecting changes in climate at subregional scales, especially in arid and semiarid regions.
英文关键词	Water vapor transport Moisture budget equation West African Monsoon Precipitation African easterly jet Tropical easterly jet
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000467187600039
WOS关键词	WATER-VAPOR TRANSPORT ; PRECIPITATION CHANGES ; HYDROLOGICAL CYCLE ; MOISTURE BUDGET ; PART I ; CLIMATE ; CHINA ; AEROSOLS ; VARIABILITY ; NCEP/NCAR
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214906
作者单位	City Univ Hong Kong, Sch Energy & Environm, Guy Carpenter Asia Pacific Climate Impact Ctr, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Akinsanola, A. A.,Zhou, Wen. Dynamic and thermodynamic factors controlling increasing summer monsoon rainfall over the West African Sahel[J],2019,52(7-8):4501-4514.
APA	Akinsanola, A. A.,&Zhou, Wen.(2019).Dynamic and thermodynamic factors controlling increasing summer monsoon rainfall over the West African Sahel.CLIMATE DYNAMICS,52(7-8),4501-4514.
MLA	Akinsanola, A. A.,et al."Dynamic and thermodynamic factors controlling increasing summer monsoon rainfall over the West African Sahel".CLIMATE DYNAMICS 52.7-8(2019):4501-4514.