Montégut C. D. auteur aut IRD Mignot Juliette auteur aut IRD Lazar Alban auteur aut IRD Cravatte Sophie auteur aut IRD text journalArticle eng Using instantaneous temperature and salinity profiles, including recent Argo data, a global ocean climatology of monthly mean properties of the "barrier layer" (BL) phenomenon is constructed. This climatology is based on the individual analysis of instantaneous profiles in contrast with previous large-scale climatologies derived from gridded fields. This ensures a more accurate description of the BL phenomenon. We distinguish three types of regions: BLs are quasi-permanent in the equatorial and western tropical Atlantic and Pacific, the Bay of Bengal, the eastern equatorial Indian Ocean, the Labrador Sea, and parts of the Arctic and Southern Ocean. In the northern subpolar basins, the southern Indian Ocean, and the Arabian Sea, BLs are rather seasonal. Finally, BLs are typically never detected between 25 degrees and 45 degrees latitude in each basin. Away from the deep tropics, the analysis reveals strong similarities between the two hemispheres and the three oceans regarding BL seasonality and formation mechanisms. Temperature inversions below the mixed layer are often associated with BLs. Their typical amplitude, depth, and seasonality are described here for the first time at global scale. We suggest that this global product could be used as a reference for future studies and to validate the representation of upper oceanic layers by general circulation models. specialized ATLANTIQUE PACIFIQUE OCEAN INDIEN GOLFE DU BENGALE OCEAN ANTARCTIQUE ARCTIQUE 066 032 112 C6 art. no. C06011 [ NIL_30-NIL_41] 2007 0148-0227 https://www.documentation.ird.fr/hor/fdi:010069214 10.1029/2006JC003953 0148-0227 [F B010069214] https://www.documentation.ird.fr/hor/fdi:010069214 IRD - Base Horizon / Pleins textes 2007-09-04 2022-01-11 fdi:010069214 fre