Preprints
https://doi.org/10.5194/essd-2023-198
https://doi.org/10.5194/essd-2023-198
07 Jun 2023
 | 07 Jun 2023
Status: this preprint is currently under review for the journal ESSD.

Lagoon hydrodynamics of pearl farming atolls: the case of Raroia, Takapoto, Apataki and Takaroa (French Polynesia)

Oriane Bruyère, Romain Le Gendre, Mathilde Chauveau, Bertrand Bourgeois, David Varillon, John Butscher, Thomas Trophime, Yann Follin, Jerome Aucan, Vetea Liao, and Serge Andréfouët

Abstract. Between 2018 and 2022, four pearl farming Tuamotu atolls of French Polynesia were monitored with autonomous oceanographic instruments to measure the hydrodynamics of atoll lagoons and the ocean-lagoon water exchanges. These surveys were conducted in the frame of ANR MANA (Management of Atolls) project and its extensions to additional sites. The overarching goal was to improve knowledge on the processes influencing the spat collection of the pearl oyster Pinctada margaritifera, the oyster species used to produce black pearls. These data sets are also critical for the calibration and validation of 3D high spatial resolution hydrodynamic models used to study the oyster larval dispersal within lagoons. The observational strategies focused on the characterization of ocean/lagoon exchanges through passes and hoa (i.e., shallow reef flats), lagoon circulation, incident waves breaking on the forereef, water elevation inside lagoon as well as spatial temperature variability. Chronologically, the investigated atolls were first Raroia Atoll with 9 months measurements between May 2018 and March 2019 during which the MALIS1 and MALIS2 cruises on-board the R/V ALIS took place. It was followed by a 4-month deployment in Takapoto Atoll (November 2021 to March 2022). In late April 2022, Apataki Atoll was instrumented until end of July, followed by Takaroa measurements between July to October. Apataki (Leg2) and Takaroa Atoll were conjointly instrumented during the MALIS 3 oceanographic cruise. Altogether, those multi-atoll data bring a worldwide unique oceanographic atoll data set, useful to address local pearl farming questions but potentially beneficial for other fundamental and applied investigations. Each data set was post processed, quality controlled and converted in NetCDF format. Files are available in open source into dedicated repositories in the SEANOE marine data platform with permanent DOIs.

Oriane Bruyère et al.

Status: open (until 22 Oct 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2023-198', Anonymous Referee #1, 14 Jul 2023 reply
  • RC2: 'Comment on essd-2023-198', Anonymous Referee #2, 20 Sep 2023 reply

Oriane Bruyère et al.

Data sets

Raroia Serge Andrefouet, Oriane Bruyère, Jérôme Aucan, Vetea Liao, and Romain Le Gendre https://doi.org/10.17882/94147

Takapoto Oriane Bruyère, Romain Le Gendre, Vetea Liao, and Serge Andrefouet https://doi.org/10.17882/94032

Apataki Oriane Bruyère, Romain Le Gendre, Vetea Liao, and Serge Andrefouet https://doi.org/10.17882/94031

Takaroa Oriane Bruyère, Romain Le Gendre, Vetea Liao, and Serge Andrefouet https://doi.org/10.17882/94146

Oriane Bruyère et al.

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Short summary
In 2018–2022, 4 pearl farming Tuamotu atolls (French Polynesia) were studied with oceanographic instruments to measure lagoon hydrodynamics and ocean-lagoon water exchanges. The goal was to gain knowledge on the processes influencing the spat collection of the pearl oyster Pinctada margaritifera, the species used to produce black pearls. A worldwide unique oceanographic atoll data set is provided to address local pearl farming questions and other fundamental and applied investigations as well.