8177eec2-786e-4a18-97c1-4d7393f735be Guillaume Payen OSU-Réunion guillaume.payen@univ-reunion.fr 2024-03-27T13:20:54 ISO 19115:2003/19139 1.0 WGS 1984 Multiwavelength aerosol lidars at Maïdo Observatory 2024-03-26T13:00:00 http://localhost:8080/demodem/editioin 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. Dominique Gantois LACy dominique.gantois@univ-reunion.fr Michaël Sicard LACy michael.sicard@univ-reunion.fr Guillaume Payen OSU-Réunion guillaume.payen@univ-reunion.fr Lidars, aerosols, maido observatory, atmosphere, climat, World Atmospheric conditions Environmental monitoring facilities GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme OPAR Thesosur 2026-02-03 geonetwork.thesaurus.local.theme.Thesosur CC BY 4 1 climatologyMeteorologyAtmosphere 2012-01-01 2024-03-01 55.37 55.40 -21.10 -21.05 night-time averaged profiles were manually screened to provide cloud-free and artifact-free profiles. Data processing consisted in Klett inversion to retrieve aerosol optical products from preprocessed files. mat Matlab format (.mat) nc NetCDF format following NDACC guidelines ftp://tramontane.univ-reunion.fr/data-access/lidar1200/L0 WWW:DOWNLOAD-1.0-ftp--download Li1200 - L0 - FTP OSU-R Raw data of the lidar Li1200, in Licel format. Restricted access ftp://tramontane.univ-reunion.fr/data-access/lidaro3s/L0 WWW:DOWNLOAD-1.0-ftp--download LiO3S - L0 - FTP OSU-R Raw data of the lidar LiO3S, in Licel format. Restricted access ftp://tramontane.univ-reunion.fr/data-access/lidaro3t/L0 WWW:DOWNLOAD-1.0-ftp--download LiO3T - L0 - FTP OSU-R Raw data of the lidar LiO3T, in Licel format. Restricted access https://geosur.osureunion.fr/thredds/catalog/opar/lidaro3t/L1bSignals/catalog.html WWW:DOWNLOAD-1.0-http--download LiO3T - L1b - Open Access https://geosur.osureunion.fr/thredds/catalog/opar/lidaro3t/L2bAerosols/catalog.html WWW:DOWNLOAD-1.0-http--download LiO3T - L2b - Open Access https://geosur.osureunion.fr/thredds/catalog/opar/lidaro3s/L2bAerosols/catalog.html WWW:DOWNLOAD-1.0-http--download LiO3S - L2b - Open Access https://geosur.osureunion.fr/thredds/catalog/opar/lidaro3s/L1bSignals/catalog.html WWW:DOWNLOAD-1.0-http--download LiO3S - L1b - Open Access https://geosur.osureunion.fr/thredds/catalog/opar/lidar1200/L1bSignals/catalog.html WWW:DOWNLOAD-1.0-http--download Li1200 - L1b - Open Access https://geosur.osureunion.fr/thredds/catalog/opar/lidar1200/L2bAerosols/catalog.html WWW:DOWNLOAD-1.0-http--download Li1200 - L2b - Open Access https://doi.org/10.26171/rwcm-q370 DOI DOI of the data