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Open AccessArticle

Using the CHIRPS Dataset to Investigate Historical Changes in Precipitation Extremes in West Africa

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African Centre of Excellence on Climate Change, Biodiversity and Sustainable Agriculture University Felix Houphouet-Boigny (UFHB), 22 B.P. 582 Abidjan 22, Cote D’Ivoire
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Laboratory of Geosciences and Environment, University Nangui Abrogoua, UFR Science and Environmental Management, 02 BP 801 Abidjan 02, Cote D’Ivoire
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LPAOSF/ESP, Cheikh Anta Diop University, 5085 Dakar-Fann, Senegal
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Laboratory of Physics of Atmosphere and Fluid Mechanics, 22 B.P. 582 Abidjan 22, Cote D’Ivoire
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Institute of Environmental Geosciences, University Grenoble Alpes, IRD, CNRS, Grenoble INP, IGE, F-38000 Grenoble, France
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Author to whom correspondence should be addressed.
Climate 2020, 8(7), 84; https://doi.org/10.3390/cli8070084
Received: 23 May 2020 / Revised: 22 June 2020 / Accepted: 24 June 2020 / Published: 30 June 2020
This study aims to provide improved knowledge and evidence on current (1986–2015) climate variation based on six rainfall indices over five West African countries (Senegal, Niger, Burkina Faso, Ivory Coast, and Benin) using the Climate Hazards Group InfraRed Precipitation with Station (CHIRPS) dataset. On average, precipitation has increased over the central Sahel and the western Sahel. This increase is associated with increase in the number of rainy days, longer wet spells and shorter dry spells. Over the Guinea Coast, the slight increase in precipitation is associated with an increase in the intensity of rainfall with a shorter duration of wet spells. However, these mean changes in precipitation are not all statistically significant and uniform within a country. While previous studies are focused on regional and sub-regional scales, this study contributes to deliver a climate information at a country level that is more relevant for decision making and for policy makers, and to document climate-related risks within a country to feed impact studies in key sectors of the development, such as agriculture and water resources. View Full-Text
Keywords: West Africa; climate change; rainfall; precipitation extreme indices; CHIRPS dataset West Africa; climate change; rainfall; precipitation extreme indices; CHIRPS dataset
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Sacré Regis M., D.; Mouhamed, L.; Kouakou, K.; Adeline, B.; Arona, D.; Houebagnon Saint. J., C.; Koffi Claude A., K.; Talnan Jean H., C.; Salomon, O.; Issiaka, S. Using the CHIRPS Dataset to Investigate Historical Changes in Precipitation Extremes in West Africa. Climate 2020, 8, 84.

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