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DOI	10.3354/cr01515
	West African Sahel has become wetter during the last 30 years; but dry spells are shorter and more frequent
	Bichet A.; Diedhiou A.
发表日期	2018
ISSN	0936-577X
起始页码	155
结束页码	162
卷号	75 期号:2
英文摘要	Over the twentieth century, Sahel rainfall has undergone extreme variations on a decadal timescale. This study investigated the recent precipitation changes in West African Sahel using a high-resolution Climate Hazards Group InfraRed Precipitation with Station (CHIRPS) product over the period 1981−2014. We found that the recent increase in precipitation results principally from an increase in the number of wet days (+10 d compared to the normal) over the entire West African Sahel band, along with an increase in the precipitation intensity over the central part of the West African Sahel (+3 mm d−1). However, this overall increase in precipitation is associated with dry spells that are becoming more frequent but on average shorter over the entire West African Sahel band (on average by 30%), and with precipitation intensity that is decreasing (around 3 mm d−1 during the study period) in the western part of the West African Sahel (Senegal). Such reorganization (i.e. weaker but more frequent precipitation) is expected to be beneficial for agriculture and society, reducing the likelihood of both flooding and droughts. © The authors 2018.
英文关键词	CHIRPS; Extreme variation; Isolated wet days; Precipitation; Sahel recovery; Senegal; Trends; Variability; Wet spells
语种	英语
scopus关键词	extreme event; precipitation (climatology); precipitation intensity; rainfall; trend analysis; wetting; Sahel [Sub-Saharan Africa]; Senegal
来源期刊	Climate Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146954
作者单位	Univ. Grenoble Alpes, IRD, CNRS, Grenoble INP, IGE, Grenoble, 38000, France
推荐引用方式 GB/T 7714	Bichet A.,Diedhiou A.. West African Sahel has become wetter during the last 30 years; but dry spells are shorter and more frequent[J],2018,75(2).
APA	Bichet A.,&Diedhiou A..(2018).West African Sahel has become wetter during the last 30 years; but dry spells are shorter and more frequent.Climate Research,75(2).
MLA	Bichet A.,et al."West African Sahel has become wetter during the last 30 years; but dry spells are shorter and more frequent".Climate Research 75.2(2018).