Larger Future Intensification of Rainfall in the West African Sahel in a Convection-Permitting Model

doi:10.1029/2019GL083544

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DOI	10.1029/2019GL083544
	Larger Future Intensification of Rainfall in the West African Sahel in a Convection-Permitting Model
	Berthou, S.1; Kendon, E. J.1; Rowell, D. P.1; Roberts, M. J.1; Tucker, S.2; Stratton, R. A.2
	2019-11-19
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2019
卷号	46 期号:22 页码:13299-13307
文章类型	Article
语种	英语
国家	England
英文摘要	Monsoon rainfall in West Africa mostly comes from mesoscale convective systems, which are not well represented by standard convection-parameterized regional climate models (RCMs). We use a 4.5 km resolution convection-permitting RCM (CP4A) which has a good representation of these processes in the Sahel. By comparing the climate change signals of CP4A and a standard RCM (R25), we find that changes in mean rainfall and wet-day frequency are linearly related. However, rainfall intensity changes are independent. Intensification of rainfall is larger in CP4A and happens in regions of both increasing and decreasing mean rainfall. Rainfall from extreme events increases by a factor of 5 to 10 in CP4A, compared to 2 to 3 in R25. CP4A also shows larger changes in intraseasonal rainfall variability, dry spells, and short and long duration extreme rainfall than R25, all of which are relevant for hydrology and agriculture.
英文关键词	convection-permitting model rainfall intensification extreme rainfall climate change West Africa
领域	气候变化
收录类别	SCI-E
WOS记录号	WOS:000497049500001
WOS关键词	CLIMATE-CHANGE ; EXTREME PRECIPITATION ; 20-1ST CENTURY ; CORDEX-AFRICA ; PROJECTIONS ; WATER ; SIMULATION ; ENSEMBLE ; CYCLE
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/225050
专题	环境与发展全球科技态势
作者单位	1.Met Off, Hadley Ctr, Exeter, Devon, England; 2.Met Off, Exeter, Devon, England
推荐引用方式 GB/T 7714	Berthou, S.,Kendon, E. J.,Rowell, D. P.,et al. Larger Future Intensification of Rainfall in the West African Sahel in a Convection-Permitting Model[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(22):13299-13307.
APA	Berthou, S.,Kendon, E. J.,Rowell, D. P.,Roberts, M. J.,Tucker, S.,&Stratton, R. A..(2019).Larger Future Intensification of Rainfall in the West African Sahel in a Convection-Permitting Model.GEOPHYSICAL RESEARCH LETTERS,46(22),13299-13307.
MLA	Berthou, S.,et al."Larger Future Intensification of Rainfall in the West African Sahel in a Convection-Permitting Model".GEOPHYSICAL RESEARCH LETTERS 46.22(2019):13299-13307.