Three-Dimensional Dispersion of Neutral “Plastic” Particles in a Global Ocean Model
International audience The fate of plastics entering the 3D ocean circulation from rivers discharge is examined through the Lagrangian analysis of neutrally buoyant particles. Particles are released continuously over 1991–2010 at the surface along the coasts according to monthly estimates of rivers...
Published in: | Frontiers in Analytical Science |
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ftunivbrest:oai:HAL:hal-03669661v1 2024-04-28T08:29:20+00:00 Three-Dimensional Dispersion of Neutral “Plastic” Particles in a Global Ocean Model Huck, Thierry Bajon, Raphaël Grima, Nicolas Portela, Esther Molines, Jean-Marc Penduff, Thierry Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) 2022-04-29 https://hal.science/hal-03669661 https://hal.science/hal-03669661/document https://hal.science/hal-03669661/file/frans-02-868515.pdf https://doi.org/10.3389/frans.2022.868515 en eng HAL CCSD Frontiers Media info:eu-repo/semantics/altIdentifier/doi/10.3389/frans.2022.868515 hal-03669661 https://hal.science/hal-03669661 https://hal.science/hal-03669661/document https://hal.science/hal-03669661/file/frans-02-868515.pdf doi:10.3389/frans.2022.868515 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2673-9283 Frontiers in Analytical Science https://hal.science/hal-03669661 Frontiers in Analytical Science, 2022, 2, ⟨10.3389/frans.2022.868515⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2022 ftunivbrest https://doi.org/10.3389/frans.2022.868515 2024-04-17T23:52:03Z International audience The fate of plastics entering the 3D ocean circulation from rivers discharge is examined through the Lagrangian analysis of neutrally buoyant particles. Particles are released continuously over 1991–2010 at the surface along the coasts according to monthly estimates of rivers plastic waste input. They are advected by daily currents from a state-of-the-art global ocean model at 1/12° resolution. At the end of the simulation (year 2010), particles remaining in the surface layer of 1 m thickness represent less than 2% of the total particles released. These are concentrated in the center of subtropical gyres, mostly in the South Indian Ocean, and the North Pacific, in relation with the large sources from Asia, and in good agreement with previous 2D numerical experiments in the surface layer. These patterns remain similar down to about 30 m depth, this upper layer strongly influenced by Ekman currents trapping about 20% of the total released particles. About 50% of the total released particles remain in the upper 100 m, and up to 90% are found in the upper 400 m at the end of the experiment. Below the mixed layer, they are more widely dispersed horizontally and follow the main global pathways of ocean ventilation of mode and deep water masses. Plastic particles, neutrally buoyant because of their small size or biofouling, are thus expected to be strongly dispersed in the global ocean thermocline following mode waters patterns, and reach the deeper layers following the North Atlantic Deep Water formation path. Two major source regions have a global impact. Particles from the western North Pacific spread over the whole Pacific Ocean poleward of 20°S, whereas particles from Indonesia spread over the whole latitude band from 60°S to 20°S. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic Université de Bretagne Occidentale: HAL Frontiers in Analytical Science 2 |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Huck, Thierry Bajon, Raphaël Grima, Nicolas Portela, Esther Molines, Jean-Marc Penduff, Thierry Three-Dimensional Dispersion of Neutral “Plastic” Particles in a Global Ocean Model |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The fate of plastics entering the 3D ocean circulation from rivers discharge is examined through the Lagrangian analysis of neutrally buoyant particles. Particles are released continuously over 1991–2010 at the surface along the coasts according to monthly estimates of rivers plastic waste input. They are advected by daily currents from a state-of-the-art global ocean model at 1/12° resolution. At the end of the simulation (year 2010), particles remaining in the surface layer of 1 m thickness represent less than 2% of the total particles released. These are concentrated in the center of subtropical gyres, mostly in the South Indian Ocean, and the North Pacific, in relation with the large sources from Asia, and in good agreement with previous 2D numerical experiments in the surface layer. These patterns remain similar down to about 30 m depth, this upper layer strongly influenced by Ekman currents trapping about 20% of the total released particles. About 50% of the total released particles remain in the upper 100 m, and up to 90% are found in the upper 400 m at the end of the experiment. Below the mixed layer, they are more widely dispersed horizontally and follow the main global pathways of ocean ventilation of mode and deep water masses. Plastic particles, neutrally buoyant because of their small size or biofouling, are thus expected to be strongly dispersed in the global ocean thermocline following mode waters patterns, and reach the deeper layers following the North Atlantic Deep Water formation path. Two major source regions have a global impact. Particles from the western North Pacific spread over the whole Pacific Ocean poleward of 20°S, whereas particles from Indonesia spread over the whole latitude band from 60°S to 20°S. |
author2 |
Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) |
format |
Article in Journal/Newspaper |
author |
Huck, Thierry Bajon, Raphaël Grima, Nicolas Portela, Esther Molines, Jean-Marc Penduff, Thierry |
author_facet |
Huck, Thierry Bajon, Raphaël Grima, Nicolas Portela, Esther Molines, Jean-Marc Penduff, Thierry |
author_sort |
Huck, Thierry |
title |
Three-Dimensional Dispersion of Neutral “Plastic” Particles in a Global Ocean Model |
title_short |
Three-Dimensional Dispersion of Neutral “Plastic” Particles in a Global Ocean Model |
title_full |
Three-Dimensional Dispersion of Neutral “Plastic” Particles in a Global Ocean Model |
title_fullStr |
Three-Dimensional Dispersion of Neutral “Plastic” Particles in a Global Ocean Model |
title_full_unstemmed |
Three-Dimensional Dispersion of Neutral “Plastic” Particles in a Global Ocean Model |
title_sort |
three-dimensional dispersion of neutral “plastic” particles in a global ocean model |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03669661 https://hal.science/hal-03669661/document https://hal.science/hal-03669661/file/frans-02-868515.pdf https://doi.org/10.3389/frans.2022.868515 |
genre |
North Atlantic Deep Water North Atlantic |
genre_facet |
North Atlantic Deep Water North Atlantic |
op_source |
ISSN: 2673-9283 Frontiers in Analytical Science https://hal.science/hal-03669661 Frontiers in Analytical Science, 2022, 2, ⟨10.3389/frans.2022.868515⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/frans.2022.868515 hal-03669661 https://hal.science/hal-03669661 https://hal.science/hal-03669661/document https://hal.science/hal-03669661/file/frans-02-868515.pdf doi:10.3389/frans.2022.868515 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3389/frans.2022.868515 |
container_title |
Frontiers in Analytical Science |
container_volume |
2 |
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1797587581705125888 |