FN Archimer Export Format PT J TI Large impact of Stokes drift on the fate of surface floating debris in the South Indian Basin BT AF Dobler, Delphine Huck, Thierry Maes, Christophe Grima, Nicolas Blanke, Bruno Martinez, Elodie ARDHUIN, Fabrice AS 1:1;2:2;3:3;4:2;5:2;6:3;7:2; FF 1:;2:;3:;4:;5:;6:;7:; C1 Univ Brest, CNRS, IRD, Ifremer Laboratoire d’Océanographie Physique et Spatiale (LOPS, UMR 6523), IUEM, Brest, France Univ Brest, CNRS, IRD, Ifremer Laboratoire d’Océanographie Physique et Spatiale (LOPS, UMR 6523), IUEM, Brest, France Univ Brest, CNRS, IRD, Ifremer Laboratoire d’Océanographie Physique et Spatiale (LOPS, UMR 6523), IUEM, Brest, France C2 UBO, FRANCE CNRS, FRANCE IRD, FRANCE UM LOPS IN WOS Cotutelle UMR IF 4.049 TC 38 UR https://archimer.ifremer.fr/doc/00512/62320/69273.pdf LA English DT Article DE ;Marine debris;Microplastics;Stokes drift;Indian Ocean;Lagrangian analysis;Ocean surface pathways AB In the open ocean, floating surface debris such as plastics concentrate in five main accumulation zones centered around 30° 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. PY 2019 PD NOV SO Marine Pollution Bulletin SN 0025-326X PU Elsevier BV VL 148 UT 000498277600021 BP 202 EP 209 DI 10.1016/j.marpolbul.2019.07.057 ID 62320 ER EF