Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 17
Articles | Volume 26, issue 17
https://doi.org/10.5194/acp-26-12565-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/acp-26-12565-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 17
Research article
 | 
04 Sep 2026
Research article |  | 04 Sep 2026

Coastal upwelling and tropical warm water intrusions are key drivers of interannual fog variability along the southwestern African coast

Alexandre Mass, Jan Cermak, and Hendrik Andersen

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Short summary
Fog is a vital water source in the Namib Desert, but its year-to-year variability is poorly understood. Using satellite observations and reanalysis data, we show that fog and low-cloud variability is closely tied to sea surface temperatures in the Benguela upwelling system. Warm events driven by tropical water intrusions are followed by reduced fog in the northern Namib, indicating that ocean state carries predictive information for fog in this hyper-arid ecosystem.
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Aerosol, fog, climate, and biogeochemistry in southern Africa...
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