Revisiting atmospheric dust export to the Southern Hemisphere ocean: Biogeochemical implications
International audience Aerosol concentrations in the Southern Hemisphere are largely undersampled. This study presents a chemical and physical description of dust particles collected on board research vessels in the southeast Pacific (SEPS) and the Southern Ocean (SOKS). Concentrations of dust were...
Published in: | Global Biogeochemical Cycles |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hal.archives-ouvertes.fr/hal-02567410 https://hal.archives-ouvertes.fr/hal-02567410/document https://hal.archives-ouvertes.fr/hal-02567410/file/2007GB002984.pdf https://doi.org/10.1029/2007GB002984 |
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ftccsdartic:oai:HAL:hal-02567410v1 2023-05-15T18:24:54+02:00 Revisiting atmospheric dust export to the Southern Hemisphere ocean: Biogeochemical implications Wagener, Thibaut Guieu, Cécile Losno, Rémi BONNET, Sophie Mahowald, Natalie Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Paris (UP)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12) Laboratoire d'Océanographie Physique et Biogéochimique (LOPB) Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) National Center for Atmospheric Research Boulder (NCAR) 2008-06 https://hal.archives-ouvertes.fr/hal-02567410 https://hal.archives-ouvertes.fr/hal-02567410/document https://hal.archives-ouvertes.fr/hal-02567410/file/2007GB002984.pdf https://doi.org/10.1029/2007GB002984 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2007GB002984 hal-02567410 https://hal.archives-ouvertes.fr/hal-02567410 https://hal.archives-ouvertes.fr/hal-02567410/document https://hal.archives-ouvertes.fr/hal-02567410/file/2007GB002984.pdf doi:10.1029/2007GB002984 info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.archives-ouvertes.fr/hal-02567410 Global Biogeochemical Cycles, American Geophysical Union, 2008, 22 (2), pp.n/a-n/a. ⟨10.1029/2007GB002984⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2008 ftccsdartic https://doi.org/10.1029/2007GB002984 2021-12-25T23:34:54Z International audience Aerosol concentrations in the Southern Hemisphere are largely undersampled. This study presents a chemical and physical description of dust particles collected on board research vessels in the southeast Pacific (SEPS) and the Southern Ocean (SOKS). Concentrations of dust were 6.1 ± 2.4 ng m À3 for SEPS and 13.0 ± 6.3 ng m À3 for SOKS. Dust fluxes, derived from those concentrations, were 9.9 ± 3.7 mg m À2 d À1 for SEPS and 38 ± 14 mg m À2 d À1 for SOKS and are shown to be representative of actual fluxes in those areas. Dust and iron deposition are up to 2 orders of magnitude lower than former predictions. A map of dust deposition on the Southern Hemisphere is proposed by incorporating those in situ measurements into a dust model. This study confirms that dust deposition is not the dominant source of iron to the large high-nutrient low-chlorophyll Southern Ocean. Article in Journal/Newspaper Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific Southern Ocean Global Biogeochemical Cycles 22 2 n/a n/a |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Wagener, Thibaut Guieu, Cécile Losno, Rémi BONNET, Sophie Mahowald, Natalie Revisiting atmospheric dust export to the Southern Hemisphere ocean: Biogeochemical implications |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Aerosol concentrations in the Southern Hemisphere are largely undersampled. This study presents a chemical and physical description of dust particles collected on board research vessels in the southeast Pacific (SEPS) and the Southern Ocean (SOKS). Concentrations of dust were 6.1 ± 2.4 ng m À3 for SEPS and 13.0 ± 6.3 ng m À3 for SOKS. Dust fluxes, derived from those concentrations, were 9.9 ± 3.7 mg m À2 d À1 for SEPS and 38 ± 14 mg m À2 d À1 for SOKS and are shown to be representative of actual fluxes in those areas. Dust and iron deposition are up to 2 orders of magnitude lower than former predictions. A map of dust deposition on the Southern Hemisphere is proposed by incorporating those in situ measurements into a dust model. This study confirms that dust deposition is not the dominant source of iron to the large high-nutrient low-chlorophyll Southern Ocean. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Paris (UP)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12) Laboratoire d'Océanographie Physique et Biogéochimique (LOPB) Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) National Center for Atmospheric Research Boulder (NCAR) |
format |
Article in Journal/Newspaper |
author |
Wagener, Thibaut Guieu, Cécile Losno, Rémi BONNET, Sophie Mahowald, Natalie |
author_facet |
Wagener, Thibaut Guieu, Cécile Losno, Rémi BONNET, Sophie Mahowald, Natalie |
author_sort |
Wagener, Thibaut |
title |
Revisiting atmospheric dust export to the Southern Hemisphere ocean: Biogeochemical implications |
title_short |
Revisiting atmospheric dust export to the Southern Hemisphere ocean: Biogeochemical implications |
title_full |
Revisiting atmospheric dust export to the Southern Hemisphere ocean: Biogeochemical implications |
title_fullStr |
Revisiting atmospheric dust export to the Southern Hemisphere ocean: Biogeochemical implications |
title_full_unstemmed |
Revisiting atmospheric dust export to the Southern Hemisphere ocean: Biogeochemical implications |
title_sort |
revisiting atmospheric dust export to the southern hemisphere ocean: biogeochemical implications |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.archives-ouvertes.fr/hal-02567410 https://hal.archives-ouvertes.fr/hal-02567410/document https://hal.archives-ouvertes.fr/hal-02567410/file/2007GB002984.pdf https://doi.org/10.1029/2007GB002984 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.archives-ouvertes.fr/hal-02567410 Global Biogeochemical Cycles, American Geophysical Union, 2008, 22 (2), pp.n/a-n/a. ⟨10.1029/2007GB002984⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2007GB002984 hal-02567410 https://hal.archives-ouvertes.fr/hal-02567410 https://hal.archives-ouvertes.fr/hal-02567410/document https://hal.archives-ouvertes.fr/hal-02567410/file/2007GB002984.pdf doi:10.1029/2007GB002984 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2007GB002984 |
container_title |
Global Biogeochemical Cycles |
container_volume |
22 |
container_issue |
2 |
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1766205902535262208 |