Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Advances in Space Research 2636-2644 Sentinel 2 Coastal areas Satellite monitoring 2020 fdi:010078043 ENG Advances in Space Research 0273-1177 ISI:000533505800015 11 10.1016/j.asr.2020.03.001 https://www.documentation.ird.fr/hor/fdi:010078043 https://www.documentation.ird.fr/intranet/publi/2020/06/010078043.pdf 65 Horizon (IRD) Climatologic and anthropogenic pressures in coastal areas affect the coastal zone at different scales. With the development of new missions in open-access, satellites now represent an attractive solution for a broad public to capture local-scale coastal impacts at large scales. Here, the capability of the Sentinel 2 constellation to cover coastal areas and measure coastal processes -physical and biological. We show that Sentinel 2 enables high-frequency measurements across the globe. Cloud coverage at higher latitudes is overcome by decrease revisit time-intervals. Only around the equator, the longest revisit intervals and high cloud cover probability limits coastal measurements there. Sentinel 2 based methods are capable of estimating Digital Elevation Models for mid- to high-latitude coastal zones and sporadic spots for lower latitudes where 2 orbit swaths overlap. For the majority of the world's coastal bathymetries can be obtained with the Sentinel 2 imagery surpassing the depth of closure (beyond this offshore limit sediment transport is limited). Only in sheltered areas, wave-based bathymetry inversion is limited but at these areas inversion through colouring (light penetration) prevails. This works shows that Sentinel 2 enables coastal monitoring as never before, large spatial scale with revisits of a few days at most of the world. 126 ; 032 ; 020 UR065