Since 2012, 3 lidars from the Atmospheric Physics Observatory of La Réunion (OPAR) have been performing aerosol profile measurements at the Maïdo observatory site, located at 2160 meters to the west of the island of La Réunion. These profiles are obtained at several wavelengths, 355nm and 532nm, and there are also depolarized channels at 532nm. The data from these 3 lidars are processed in two stages: initially, the data are manually cleaned of disturbed profiles, either by atmospheric effects, such as the passage of clouds, or by electronic effects like noise. They are then summed over the night. This is the L1b level, and the data are available in the Matlab format (.mat). Subsequently, the data are processed to convert from a profile of received photon number to a profile of aerosol extinction and scattering. The methodology used is based on the Klett calculation at one wavelength. This is the L2b level, and the data are available in the NetCDF format (.nc) with the NDACC convention in the choice of variable names. Therefore, the data are distributed across 6 directories, 2 levels of processing for each lidar. The raw data from the instrument (called L0) are in a proprietary format, the Licel format, and are not accessible in open access, only via FTP with restricted access.

The station is managed by the Observatoire de la Zone Critique de la Réunion (OZC-R) from Observatoire des Sciences de l'Univers de La Réunion (OSU-Réunion, Université de La Réunion). This is a forest station located at 1285m asl in the Reunion National Park. Rainwater is monthly collected (PALMEX rain collector) for δ18O and δ2H water isotopes analysis from 2016. Analyses are carried out at the Institut de Physique du Globe in Paris (PARI analytical platform) and within the IR-OZCAR network. The major ions rainfall composition is also studied. The station also measures several meteorological variables outside the canopy (precipitation, atmospheric pressure, temperature, relative humidity, global and photosynthetically active radiation) but also humidity linked to clouds and fog, as well as ground temperature.

Afin d'estimer les bilans de productivité (photosynthèse-respiration) et de calcification sur le récif frangeant de La Saline, des mesures de lumière, température, salinité, courant et chimie de l'eau (oxygène dissous, pH, alcalinité) ont été effectuées sur 5 sites (Toboggan, Livingstone, Trou d'Eau, Bodega et sur la pente externe) répartis sur 5 périodes (Février-Mars 2020, Octobre 2020, Avril 2021, Octobre 2021 et Juin 2022). Ces données ont permis de caractériser la variabilité spatio-temporelle naturelle de la chimie de l'eau de mer et d'identifier l'influence des facteurs locaux sur cette variabilité. Elles ont aussi permis d'étudier la faisabilité de la méthode Eulérienne de respirométrie en flux pour l'estimation des bilans de productivité et de calcification sur le récif frangeant de La Saline et ainsi de calculer ces bilans sur deux secteurs (Toboggan et Trou d'Eau/Bodega).