Diverse causes of extreme rainfall in November 2023 over Equatorial Africa

Nana, Hermann N.; Gudoshava, Masilin; Tanessong, Roméo S.; Tamoffo, Alain T.; Vondou, Derbetini A.

doi:https://doi.org/10.5194/wcd-6-741-2025

Articles | Volume 6, issue 3

https://doi.org/10.5194/wcd-6-741-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/wcd-6-741-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 6, issue 3

Research article

|

11 Jul 2025

Research article |

| 11 Jul 2025

Diverse causes of extreme rainfall in November 2023 over Equatorial Africa

Hermann N. Nana, Masilin Gudoshava, Roméo S. Tanessong, Alain T. Tamoffo, and Derbetini A. Vondou

Data sets

ERA5 monthly averaged data on pressure levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/cds.6860a573

Index of /products/CHIRPS-2.0/global\_daily/netcdf/p05/by\_month/ UCSB https://data.chc.ucsb.edu/products/CHIRPS-2.0/global_daily/netcdf/p05/by_month/

Short summary

The results of this study show that extreme rainfall in November 2023 over Equatorial Africa was controlled by several factors, including strong sea-surface-temperature anomalies in the Niño-3.4, North Tropical Atlantic, Equatorial Atlantic and Indian Ocean Dipole regions; changes in zonal winds; the Walker circulation; the moisture flux and its divergence; and the easterly jets. The information we derive can be used to support risk assessment in the region and to improve our resilience to ongoing climate change.