@article{fdi:010068410,
  title = {{V}ariabilit{\'e}s interannuelle et intra-saisonni{\`e}re des pluies aux {\'e}chelles hydrologiques : la mousson ouest-africaine en climat soudanien = {S}easonal cycle and interannual variability of rainfall at hydrological scales : the {W}est {A}frican monsoon in a {S}udanese climate},
  author = {{L}e {L}ay, {M}. and {G}alle, {S}ylvie},
  editor = {},
  language = {{FRE}},
  abstract = {{W}est {A}frican rainfall is characterized by a strong variability, both at decadal and interannual scales. {I}n order to quantify the hydrological impacts of such a variability, analysis of rainfall patterns at fine scales is highly essential. {T}his diagnostic study aims to characterize the {S}udanese rainfall regime at hydrological scales, using a raingauge data set collected on the upper {O}ueme {R}iver catchment ({B}enin) between 1950 and 2002. {A} long-term drought is observed during the 1970s and 1980s, as in the {S}ahel. {H}owever, the interannual variability remains significant in the {S}udanese region. {T}he 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. {O}n 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. {O}n 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.},
  keywords = {catchment ; {S}udanese climate ; rainfall deficit ; monsoon ; precipitation ; {W}est {A}frica},
  booktitle = {},
  journal = {{H}ydrological {S}ciences {J}ournal = {J}ournal {D}es {S}ciences {H}ydrologiques},
  volume = {50},
  numero = {3},
  pages = {509--524},
  ISSN = {0262-6667},
  year = {2005},
  DOI = {10.1623/hysj.50.3.509.65029},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068410},
}