期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：2008
卷号：19
期号：1
页码：23-28
DOI：10.1684/sec.2008.0121
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Tidiane Sané , Mbaye Diop , Pascal Sagna Laboratoire d’enseignement et de recherche en géomatique (Lerg), Campus universitaire de l’École supérieure polytechnique de Dakar (ESP), Université Cheikh Anta Diop (Ucad), BP 25275, Dakar-Fann Sénégal, Institut sénégalais de recherche agricole (Isra), Laboratoire d’enseignement et de recherche en héomatique (Lerg), BP 25275, Dakar-Fann, Sénégal, Département de géographie, Laboratoire de climatologie et d’environnement (LCE), Université Cheikh Anta Diop (Ucad), BP 5005, Dakar - Fann, Sénégal Key words: climate, diachronic study, drought, rainfall, Senegal DOI : 10.1684/sec.2008.0121 Page(s) : 23-8 Published in: 2008 The aim of this study is to define the state of quality of the rainy season from 1951 to 2000 in Upper Casamance, an area considered to be one of the rainiest in Senegal. Day laborer rainfall records of the two principal stations of the zone (Kolda and Velingara) were used. This work shows a clear downward trend in the number of rainy days, a shortening of the rainy season especially during the last thirty years and a higher frequency in dry episodes throughout the extent of the rainy season. The study also shows that there is 80% probability of the rainy season beginning in the second half of June and ending during the first half of October. All the months of the rainy season are affected by dry spells with the 1968-1985 period being most seriously affected by these anomalies.
