NDLI: Spatial Variation and Trend of Extreme Precipitation in West Africa and Teleconnections with Remote Indices

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Spatial Variation and Trend of Extreme Precipitation in West Africa and Teleconnections with Remote Indices

Content Provider	MDPI
Author	Diatta, Samo Diedhiou, Cheikh Dione, Didier Sambou, Soussou
Copyright Year	2020
Description	Extreme precipitation is a great concern for West Africa country, as it has serious consequence on key socio-economic activities. We use high resolution data from the Climate Hazards Group InfraRed Precipitation Stations (CHIRPS) to determine the spatial variability, trend of 8 extreme precipitation indices in West Africa and their relationship to remote indices. Spatial variability of extreme is characterized by maximum precipitation over the orographic regions, and in southern Sahel. The trend analysis shows a decrease of dry condition in Sahel and Sahara, and an increase tendency of wet indices over western Sahel and southern Sahel. The correlation analysis reveals that extreme precipitation in Sahel is strongly teleconnected to the Eastern Mediterranean Sea (EMS), whereas western and western-north Sahel is associated with both Atlantic Meridional Mode (AMM), Maiden Julian Oscillation phase 8 (MJO8), El Niño 3.4 index (NINO.3.4), and Trans-Atlantic-Pacific Ocean Dipole Index (TAPODI) but with different characteristics or directions. Guinean coast extreme precipitation is highly associated with Atlantic zone 3 SST anomaly (ATL3), Northern Cold Tongue Index (NCTI), TAPODI but also with an opposite sign with NINO.3.4 and in somewhat with the MJO8.
Starting Page	999
e-ISSN	20734433
DOI	10.3390/atmos11090999
Journal	Atmosphere
Issue Number	9
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2020-09-18
Access Restriction	Open
Subject Keyword	Atmosphere Atmospheric Sciences West Africa Extreme Precipitation Teleconnection
Content Type	Text
Resource Type	Article

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