DOI: 10.3354/cr01515
Scopus记录号: 2-s2.0-85056214759
论文题名: West African Sahel has become wetter during the last 30 years, but dry spells are shorter and more frequent
作者: Bichet A. ; Diedhiou A.
刊名: Climate Research
ISSN: 0936577X
出版年: 2018
卷: 75, 期: 2 起始页码: 155
结束页码: 162
语种: 英语
英文关键词: CHIRPS
; Extreme variation
; Isolated wet days
; Precipitation
; Sahel recovery
; Senegal
; Trends
; Variability
; Wet spells
Scopus关键词: extreme event
; precipitation (climatology)
; precipitation intensity
; rainfall
; trend analysis
; wetting
; Sahel [Sub-Saharan Africa]
; Senegal
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116253
Appears in Collections: 气候减缓与适应
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Recommended Citation:
Bichet A.,Diedhiou A.. West African Sahel has become wetter during the last 30 years, but dry spells are shorter and more frequent[J]. Climate Research,2018-01-01,75(2)