ArticleScience advances2024
Coastal trapped waves and tidal mixing control primary production in the tropical Angolan upwelling system.
Article in Science advances, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Interannual variability of net primary productivity in the northwest African coastal upwelling system and their relation to Dakar Niños.Scientific reports · 2025Article
- Positive Indian Ocean Dipole intensifies marine heatwaves in the tropical southeast Atlantic coastal region.Science advances · 2025Article
- Predicting Atlantic and Benguela Niño events with deep learning.Science advances · 2025Article
- Strength and timing of austral winter Angolan coastal upwelling.Scientific reports · 2024Article
- Drivers and impact of the 2021 extreme warm event in the tropical Angolan upwelling system.Scientific reports · 2024Article
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Eastern boundary upwelling systems are hotspots of marine life and primary production. The strength and seasonality of upwelling in these systems are usually related to local wind forcing. However, in some tropical upwelling systems, seasonal maxima of productivity occur when upwelling favorable winds are weak. Here, we show that in the tropical Angolan upwelling system (tAUS), the seasonal productivity maximum is due to the combined effect of coastal trapped waves (CTWs) and elevated tidal mixing on the shelf. During austral winter, the passage of an upwelling CTW displaces the nitracline upward by more than 50 m. Thereby, nitrate-rich waters spread onto the shelf, where elevated vertical mixing causes a nitrate flux into the surface mixed layer. Interannual variability of the productivity maximum is strongly correlated to the amplitude of the upwelling CTW as seen in sea level data. Given that CTWs are connected to equatorial forcing, a predictability of the strength of the productivity maximum is suggested.
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Registered trials
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