Observatoire des Sciences de l’Univers (OSUR) is a mix unit (CNRS and Université de la Réunion) located at Saint Denis in La Réunion (French overseas department in Indian Ocean), France.
With regards to environmental observations, OSU-R includes 4 geophysical stations:
the atmospheric observatory at Maïdo (2160 m asl) on the northwestern part of the island,
the coast station on the western coast at Saint Gilles for observations of the reef zone, on the coast line, and on coastal aquifers,
the forest station on the southern coast at Saint Philippe for forest ecological observations,
the hydrological station in the drainage basin "Rivière des Pluies" over the northern coast.
The stations are managed by research laboratories federated in OSU-R for delivering quality long-term observation data sets, and for promoting trans-disciplinary research.