Data/hora: 05/06/2024 03:42:29

Provedor de dados: 	5	
País: 	France	
Título: 	Seasonal cycle and interannual variability of rainfall at hydrological scales. The West African monsoon in a Sudanese climate	
Autores: 	Le Lay, Matthieu; Galle, Sylvie.	
Data: 	2005-06	
Ano: 	2005	
Palavras-chave: 	Catchment; Sudanese climate; Rainfall deficit; Monsoon; Precipitation; West Africa.	
Resumo: 	West African rainfall is characterized by a strong variability, both at decadal and interannual scales. In order to quantify the hydrological impacts of such a variability, analysis of rainfall patterns at fine scales is highly essential. This diagnostic study aims to characterize the Sudanese rainfall regime at hydrological scales, using a raingauge data set collected on the upper Oueme River catchment (Benin) between 1950 and 2002. A long-term drought is observed during the 1970s and 1980s, as in the Sahel. However, the interannual variability remains significant in the Sudanese region. The study of the seasonal cycle, based on the distinction between the oceanic and continental monsoon regimes, shows that the majority of rainfall changes occur in the continental regime. On the one hand, the rainfall peak associated with this regime that has been observed for the last 50 years has occurred increasingly earlier in the season. On the other hand, the annual rainfall deficit is mainly linked to the decrease in the number of large events during the continental part of the season.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	https://archimer.ifremer.fr/doc/00203/31460/30115.pdf

DOI:10.1623/hysj.50.3.509.65029

https://archimer.ifremer.fr/doc/00203/31460/	
Editor: 	Iahs Press, Inst Hydrology	
Formato: 	application/pdf	
Fonte: 	Hydrological Sciences Journal-journal Des Sciences Hydrologiques (0262-6667) (Iahs Press, Inst Hydrology), 2005-06 , Vol. 50 , N. 3 , P. 509-524	
Fonte: 	2005 IAHS Press

info:eu-repo/semantics/openAccess

restricted use