21 Aug 2023
 | 21 Aug 2023
Status: this preprint is currently under review for the journal ESSD.

Lagoon hydrodynamics of pearl farming islands: the case of Gambier (French Polynesia)

Oriane Bruyère, Romain Le Gendre, Vetea Liao, and Serge Andréfouët

Abstract. Between 2019 and 2020, the Gambier lagoon was instrumented over a period of 9 months with a large array of autonomous oceanographic instruments measuring temperature, pressure and current. Two deployments were conducted, respectively from June 2019 to October 2019 (Leg1) and from late October 2019 to late February 2020 (Leg2). A total of sixteen instrumented locations were spread across the lagoon and on the forereef. Physical parameters were measured to characterize the wave climate, tide and surges, lagoonal circulation, and spatial and vertical temperature variabilities. Those observations were part of the ANR-funded MANA project (2017–2022) and its derivatives that aimed to improve knowledge of processes influencing the spat collection of Pinctada margaritifera oysters that are used for black pearl farming and production. This data set was a prerequisite for the development of a high resolution biophysical model on Gambier lagoon which aims at tackling the connectivity oyster larvae. The sampling strategy focused on the northern region of Gambier lagoon and especially on the sub-lagoon of Rikitea which is a prime spat collection site. The data set was post processed, quality controlled and is archived in a dedicated repository with a permanent DOI into the SEANOE marine data platform.

Oriane Bruyère et al.

Status: open (until 06 Nov 2023)

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  • RC1: 'Comment on essd-2023-302', Stuart Pearson, 18 Sep 2023 reply

Oriane Bruyère et al.

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Lagoon hydrodynamics of pearl farming islands in French Polynesia : the case of Gambier Islands S. Andréfouët, O. Bruyère, V. Liao, R. Le Gendre

Oriane Bruyère et al.


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Short summary
In 2019–2020, the lagoon and forereefs of Gambier Island (French Polynesia) were monitored with oceanographic instruments to measure lagoon hydrodynamics and ocean-lagoon water exchanges. Gambier Island is a key black pearl producer and the study goal was to understand the processes influencing spat collection of pearl oyster Pinctada margaritifera, the species used to produce black pearls. The data set is provided to address local pearl farming questions and other investigations as well.