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    ReefTEMPS is a network created by the IRD, initially covering some twenty territories and island states in the South, South-West and West Pacific. ReefTEMPS-OI is the Indian Ocean version. The network uses temperature, pressure, salinity and other coastal observables to monitor climate change and its effects on coral reefs and their resources over the long term. ReefTEMPS is part of the French national federative Research Infrastructure for coastal ocean and seashore observations named IR I-LICO, accredited as a National Observation Service (SNO) by the CNRS-INSU Ocean-Atmosphere Commission. ReefTEMPS is operated by ENTROPIE since 2019. Previously, it was created and led by GOPS (a consortium of research observatories in the South Pacific) during the period 2010-2017, then coordinated by UMR LEGOS in 2018. ReefTEMPS-OI, its Indian Ocean version, is operated by OSU-Réunion since 2020.

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    This dataset has been produced in the framework of the CALHYCO research programme: Characterization of hydrodynamics coastal hazards. This dataset contains: 1) in-situ records of water level and wave height parameters from spectral analysis, on a transect perpendicular to the reef, at the reef slope (RS) and the reef flat (RF). 2) Numerical modelling of water levels and wave heights on the reef using the XBeach model in "surf beat" mode A "readme" file, downloadable with the data files, describes the nomenclature of the files and the variables measured. These in-situ surveys took place on the western side of La Reunion Island (Indian Ocean) in a microtidal zone frequently exposed to Southern Ocean swell and cyclonic events. Coral reefs represent an efficient natural mechanical coastal defense against ocean waves. The objective of CALHYCO is to provide a better understanding of the coastal defense characteristics of the reef system against these events.