Ocean Science
Ocean Science
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Articles | Volume 22, issue 2
Articles | Volume 22, issue 2
https://doi.org/10.5194/os-22-871-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-22-871-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 2
Research article
 | 
19 Mar 2026
Research article |  | 19 Mar 2026

Tidal signatures on surface chlorophyll a concentration in the Brazilian Equatorial Margin

Carina Regina de Macedo, Ariane Koch-Larrouy, José Carlos Bastos da Silva, Jorge Manuel Magalhães, Fernand Assene, Manh Duy Tran, Isabelle Dadou, Amine M'Hamdi, Trung Kien Tran, and Vincent Vantrepotte

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Short summary
We investigated how ocean tides influence marine phytoplankton along the North Brazilian coast. Using satellite data from 2005 to 2021, we found that tides can either enhance or reduce phytoplankton growth on the continental shelf. Offshore, internal tides stimulate primary production along their pathways. These results improve our understanding of how tidal processes shape marine life in tropical coastal regions.
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