Dobler D. auteur aut IRD Huck T. auteur aut IRD Maes Christophe auteur aut IRD Grima N. auteur aut IRD Blanke B. auteur aut IRD Martinez Elodie auteur aut IRD Ardhuin F. auteur aut IRD text journalArticle eng text/pdf born digital access In the open ocean, floating surface debris such as plastics concentrate in five main accumulation zones centered around 30 degrees latitude, far from highly turbulent areas. Using Lagrangian advection of numerical particles by surface currents from ocean model reanalysis, previous studies have shown long-distance connection from the accumulation zones of the South Indian to the South Pacific oceans. An important physical process affecting surface particles but missing in such analyses is wave-induced Stokes drift. Taking into account surface Stokes drift from a wave model reanalysis radically changes the fate of South Indian particles. The convergence region moves from the east to the west of the basin, so particles leak to the South Atlantic rather than the South Pacific. Stokes drift changes the South Indian sensitive balance between Ekman convergence and turbulent diffusion processes, inducing either westward entrainment in the north of the accumulation zone, or eastward entrainment in the south. specialized Marine debris Microplastics Stokes drift Indian Ocean Lagrangian analysis Ocean surface pathways OCEAN INDIEN 038 032 020 148 202-209 2019 0025-326X https://www.documentation.ird.fr/hor/fdi:010077363 10.1016/j.marpolbul.2019.07.057 0025-326X [F B010077363] https://www.documentation.ird.fr/hor/fdi:010077363 https://www.documentation.ird.fr/intranet/publi/2019/12/010077363.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2020-01-07 2025-02-24 fdi:010077363 fre