Major drivers of climate variability affecting the region

- Author: World Meteorological Organization
- Main Title: State of the Climate in Africa 2021 , pp 20-21
- Publication Date: August 2023
- DOI: https://doi.org/10.18356/9789263113009c007
- Language: English
Rainfall variability is affected not only by the phases of the El Niño Southern Oscillation (ENSO), but also by sea-surface temperature (SST) anomalies in the tropical Atlantic Ocean and Indian Ocean. Indeed, La Niña episodes are typically associated with above-average summer precipitation over the Sahel. Positive SST anomalies over the tropical Atlantic Ocean are also usually favourable for above-average summer rainfall over West Africa. Warmer SSTs over the south-western Indian Ocean (SWIO) tend to be associated with above-average rainfall across Southern Africa. Usually, a positive IOD phase contributes to increased convection over the western Indian Ocean and leads to wetter-than-normal conditions over East Africa.
© 2022 United Nations
ISBN (PDF):
9789263113009
Book DOI:
https://doi.org/10.18356/9789263113009
Sustainable Development Goals:
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