Evolution des saisons des pluies potentiellement utiles au Togo de 1950 a 2000

Abstract : Since 1970s, a disruption of the rains was observed in Togo characterized by a disorganization of the potentially useful seasons (SPPU). Between the periods 1950-1969 and 1970-2000, one observes a delay of the middle dates of beginning of the SPPU. The shift of beginning in rainy season is of about one month of 1950-69 to 1970- 2000. In relation to the period 1950-69, one observes a more precocious end of the SPPU of at least two weeks since 1970s in North-Togo. Indeed, the Savannas region recorded the precocious stop of the rains of the 7 to 21 October (1950-69). Since 1970s, it is rather the strip situated between Kanté and Atakpamé that know this stop premature of rainy season. Henceforth, rains stop more precociously to the North extreme between September 24 and October 06. To the exception of the Northwest, the dates of end of the SPPU remain relatively steady in the Guinean area. Besides the extent of the variability of the dates of end of rains watch that to the more three weeks separate the precocious and belated stop of the useful rains. That it is in Soudanian or Guinean zones, the reduction of the length of SPPU especially corresponds to a more belated arrival of the potentially useful rains. The rainfall pejoration change appears therefore by an increase of variability on the beginning of the rainy season, the end remaining globally steady.
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Submitted on : Friday, January 28, 2011 - 8:50:26 PM
Last modification on : Tuesday, July 9, 2019 - 3:40:06 PM

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  • HAL Id : halshs-00560657, version 1

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Adewi Essotalani, K.M.S. Badameli, Vincent Dubreuil. Evolution des saisons des pluies potentiellement utiles au Togo de 1950 a 2000. Climatologie, Association internationale de climatologie, 2010, 7, pp.89-108. ⟨halshs-00560657⟩

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