A synthetic view of rainfall intensification in the West African Sahel
A synthetic view of rainfall intensification in the West African Sahel
复制标题
西非萨赫勒地区降雨强度的综合看法
DOI：
10.1088/1748-9326/ac4a9c
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发表时间：
2022
影响因子：
6.7
通讯作者：
Chagnaud G
中科院分区：
文献类型：
--
作者：
Chagnaud G
The West African Sahel has been facing for more than 30 years an increase in extreme rainfall with strong socio-economic impacts. This situation challenges decision-makers to define adaptation strategies in a rapidly changing climate. The present study proposes (i) a quantitative characterization of the trends in extreme rainfall at the regional scale,(ii) the translation of the trends into metrics that can be used by hydrological risk managers,(iii) elements for understanding the link between the climatology of extreme and mean rainfall. Based on a regional non-stationary statistical model applied to in-situ daily rainfall data over the period 1983–2015, we show that the region-wide increasing trend in extreme rainfall is highly significant. The change in extreme value distribution reflects an increase in both the mean and variability, producing a 5%/decade increase in extreme rainfall intensity whatever the return period. The statistical framework provides operational elements for revising the design methods of hydraulic structures which most often assume a stationary climate. Finally, the study shows that the increase in annual maxima of daily rainfall is more attributable to stronger storm intensities (80%) than to more frequent storm occurrences (20%), reflecting a major rainfall regime shift in comparison to those observed in the region since 1950.
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影响因子：
6.7
作者：
Giannini, A.;Salack, S.;Ndiaye, O.
通讯作者：
Ndiaye, O.
影响因子：
5.4
作者：
G. Panthou;T. Vischel;T. Lebel;J. Blanchet;G. Quantin;Abdou Ali
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G. Panthou;T. Vischel;T. Lebel;J. Blanchet;G. Quantin;Abdou Ali
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DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
J. Blanchet;A. Davison
通讯作者：
A. Davison
通过结合多个站点的数据来估计极端降雨量
DOI：
--
发表时间：
1991
期刊：
影响因子：
--
作者：
T. Buishand
通讯作者：
T. Buishand
萨赫勒径流对气候变化的敏感性
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
M. Gerbaux;Nick Hall;N. Dessay;I. Zin
通讯作者：
I. Zin