Earth System Science Data
Earth System Science Data
Earth System Science Data
Articles | Volume 18, issue 7
Articles | Volume 18, issue 7
https://doi.org/10.5194/essd-18-5283-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-18-5283-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 7
Data description article
 | Highlight paper
 | 
22 Jul 2026
Data description article | Highlight paper |  | 22 Jul 2026

Lagoon temperature and hydrodynamics of Reao Atoll (Tuamotu Archipelago, French Polynesia) before and during the 2024 El-Niño marine heatwave

Esther Ladet, Carla Chevillard, Romain Le Gendre, Thomas Trophime, Sébastien Petton, and Simon Van Wynsberge

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Editorial statement
These observations provide a unique basis for understanding thermal exposure in atoll lagoons and for identifying climate-resilient thermal refugia to support the sustainable management of giant clam fisheries under marine heat waves.
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Short summary
This dataset on Reao atoll provides an unprecedented record of thermal dynamics and lagoon circulation in a semi-closed atoll of French Polynesia, including full coverage of the extreme 2024 marine heatwave that caused mass bleaching. Collected over six monitoring periods between 2016 and 2025, it offers a critical basis for analysing thermal exposure of giant clams, identifying potential refugia, and supporting modelling of atoll responses to climate change.
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