Periodicity of wave-driven flows and lagoon water renewal for 74 Central Pacific Ocean atolls

Type Article
Date 2022-06
Language English
Author(s) Andréfouët Serge1, Desclaux Terence4, Buttin Julie1, Jullien SwenORCID2, Aucan Jérôme3, Le Gendre RomainORCID4, Liao Vetea5
Affiliation(s) 1 : Institut de Recherche pour le Développement, UMR 9220 ENTROPIE (Institut de Recherche Pour le Développement), Université de la Réunion, Université de Nouvelle-Calédonie, Ifremer, Centre National de la Recherche Scientifique, BP A5, 98848 Nouméa cedex, New Caledonia
2 : Ifremer, Univ. Brest, CNRS, IRD, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, Plouzané, France
3 : IRD, LOCEAN (UMR 7159), BP A5, 98848 Nouméa cedex, New Caledonia
4 : IFREMER, ENTROPIE, UMR 9220, Institut de Recherche pour le Développement, Université de la Réunion, Université de Nouvelle-Calédonie, Ifremer, Centre National de la Recherche Scientifique, BP 32078, 98897 Noumea Cedex, New Caledonia
5 : Direction des Ressources Marines, BP 20, 98713 Papeete, French Polynesia
Source Marine Pollution Bulletin (0025-326X) (Elsevier BV), 2022-06 , Vol. 179 , P. 113748 (17p.)
DOI 10.1016/j.marpolbul.2022.113748
WOS© Times Cited 5
Keyword(s) Tuamotu, Pearl farming, WaveWatch III, Hoa, Residence time, Wavelet transform
Abstract

French Polynesia atolls are spread on a vast 2300 by 1200 km Central Pacific Ocean area exposed to spatially and temporally dependent wave forcing. They also have a wide range of closed to open morphologies and several have been suitable to develop from black-lipped pearl oysters a substantial pearl farming activity in the past 30 years, representing nowadays the 2nd source of income for French Polynesia. Considering here only the component of lagoon renewal that is driven by waves, we investigate for 74 atolls different lagoon renewal metrics using 20 years of wave model data at 0.05° spatial resolution. Wavelet spectral analyses highlight that atolls, even in close vicinity, can be exposed to different and characteristic periodicities in wave-driven flows and water renewal. These characteristics are discussed in relation to pearl farming atolls, including atolls known to be efficient oyster spat producers, a critical activity for pearl farming sustainability.

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