6533b86cfe1ef96bd12c883e

RESEARCH PRODUCT

Durée et fréquence des vagues de chaleur en Afrique tropicale septentrionale selon 5 indices de chaleur

Sandra RomeBenjamin PohlBoutheina OueslatiVincent MoronFlorian RaymondSerge JanicotA. Diedhou

subject

Excess Heat Factor (EHF)indice de chaleur (HI)vague de chaleur (HW)[SHS.GEO] Humanities and Social Sciences/Geography[SDE.MCG]Environmental Sciences/Global Changesheat indexAfrique de l’Ouest[SHS.GEO]Humanities and Social Sciences/Geography[SDE.ES]Environmental Sciences/Environmental and Society[SDE.MCG] Environmental Sciences/Global ChangesACASIS.West AfricaACASISHeat Wave (HW)[SDE.ES] Environmental Sciences/Environmental and SocietyFacteur de chaleur excessive (EHF)

description

Thermal extremes generate health risks that are increasingly taken into account, including in tropical Africa. This work compares the duration and the frequency of spring heat waves (HWs) in West Africa according to 5 indices: Warm Spell (WS), Heat Index (HI) with and without the relative humidity, Apparent Temperature (AT), and Excess Heat Factor (EHF). The daily relative humidity and temperature data (minimum, maximum, dew point are provided by the GSOD database for the period 1973-2014 and cover 145 stations spread over a large African area (3-24°N; 24°W-36°E). The results show that the duration of the HWs is short on the coast (3 days) and they last longer inland the continent and in the Sahelian belt. HWs’ frequency varies greatly according to the heat indices used, from 3% of spring days in Cape Verde to 30 % in Central Sahel for the EHF.

yearjournalcountryeditionlanguage
2019-05-29
https://shs.hal.science/halshs-02151950/document