Van Wynsberge S. auteur aut IRD Quéré R. auteur aut IRD Andréfouët Serge auteur aut IRD Autret E. auteur aut IRD Le Gendre R. auteur aut IRD text journalArticle eng text/pdf born digital access Sea Surface Temperature (SST) maps are necessary for managing marine resources in a climate change context, but are lacking for most of the 598 world's atolls. We assessed the feasibility of using the Landsat-8 (L8) satellite to infer SST maps for four French Polynesia atolls of aquaculture interest in Tuamotu Archipelago, namely Takaroa, Raroia, Tatakoto, and Reao. Specifically, we (1) used sensors to measure in situ the range of spatial temperature differences recorded in these four atoll lagoons; (2) calibrated and assessed the performances of SST algorithms to estimate lagoon temperature from L8 signals; (3) generated temperature maps for the lagoons and compared spatial patterns of temperature obtained from these maps with patterns highlighted by in situ sensors. Good agreements between satellite and in situ temperature data were obtained, with better results achieved when using an atoll-by-atoll optimization (average bias = -0.26 degrees C; RMSE = 0.55 degrees C). However, we also show that the range of temperature inside atoll lagoons is low, and of the same order of magnitude than RMSE achieved with SST algorithms. Because of the L8 overpass time (similar to 9 a.m.) and the revisit time (16 days), L8 SST could not capture the entire range of spatial differences measured in situ in the four lagoons, but could capture spatial gradients and fronts better than with few in situ sensors. Considering the achieved accuracies and the actual temperature differences at the four study sites, we discuss the usefulness of L8 derived SST maps to assist fishery and aquaculture management in atoll lagoons, as well as the possible generalization to other lagoons. specialized Landsat Sea surface temperature Coral reefs Aquaculture Fisheries POLYNESIE FRANCAISE TUAMOTU 126 032 36 101340 [15 p.] 2024 2352-9385 https://www.documentation.ird.fr/hor/fdi:010091297 10.1016/j.rsase.2024.101340 2352-9385 [F B010091297] https://www.documentation.ird.fr/hor/fdi:010091297 https://www.documentation.ird.fr/intranet/publi/2024-10/010091297.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2024-10-23 2025-11-06 fdi:010091297 fre