气候变化领域集成服务门户(CCPortal): Amplification of synoptic to annual variability of West African summer monsoon rainfall under global warming

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DOI	10.1038/s41612-020-0125-1
	Amplification of synoptic to annual variability of West African summer monsoon rainfall under global warming
	Akinsanola A.A.; Zhou W.; Zhou T.; Keenlyside N.
发表日期	2020
ISSN	23973722
卷号	3 期号:1
英文摘要	Increased knowledge of future changes in rainfall variability is needed to reduce vulnerability to potential impacts of global warming, especially in highly vulnerable regions like West Africa. While changes in mean and extreme rainfall have been studied extensively, rainfall variability has received less attention, despite its importance. In this study, future changes in West African summer monsoon (WASM) rainfall variability were investigated using data from two regional climate models that participated in the Coordinated Regional Climate Downscaling Experiment (CORDEX). The daily rainfall data were band-pass filtered to isolate variability at a wide range of timescales. Under global warming, WASM rainfall variability is projected to increase by about 10–28% over the entire region and is remarkably robust over a wide range of timescales. We found that changes in mean rainfall significantly explain the majority of intermodel spread in projected WASM rainfall variability. The role of increased atmospheric moisture is examined by estimating the change due to an idealized local thermodynamic enhancement. Analysis reveals that increased atmospheric moisture with respect to warming following the Clausius–Clapeyron relationship can explain the majority of the projected changes in rainfall variability at all timescales. © 2020, The Author(s).
语种	英语
scopus关键词	atmospheric moisture; climate modeling; global warming; monsoon; rainfall; summer; synoptic meteorology; West Africa
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178045
作者单位	Department of Geography, University of Georgia, Athens, GA, United States; Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Kowloon Tong, Hong Kong; LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, and University of Chinese Academy of Sciences, Beijing, China; Geophysical Institute, University of Bergen, and Bjerknes Centre for Climate Research, Bergen, Norway
推荐引用方式 GB/T 7714	Akinsanola A.A.,Zhou W.,Zhou T.,et al. Amplification of synoptic to annual variability of West African summer monsoon rainfall under global warming[J],2020,3(1).
APA	Akinsanola A.A.,Zhou W.,Zhou T.,&Keenlyside N..(2020).Amplification of synoptic to annual variability of West African summer monsoon rainfall under global warming.npj Climate and Atmospheric Science,3(1).
MLA	Akinsanola A.A.,et al."Amplification of synoptic to annual variability of West African summer monsoon rainfall under global warming".npj Climate and Atmospheric Science 3.1(2020).