Revisiting atmospheric dust export to the Southern Hemisphere ocean: Biogeochemical implications
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⁻³ for SE...
Published in: | Global Biogeochemical Cycles |
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Language: | English |
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American Geophysical Union
2008
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-937 https://doi.org/10.1029/2007GB002984 |
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ftncar:oai:drupal-site.org:articles_6443 2023-07-30T04:07:00+02:00 Revisiting atmospheric dust export to the Southern Hemisphere ocean: Biogeochemical implications Wagener, Thibaut (author) Guieru, Cécile (author) Losno, Rémi (author) Bonnet, Sophie (author) Mahowald, Natalie (author) 2008-04-22 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-937 https://doi.org/10.1029/2007GB002984 en eng American Geophysical Union Global Biogeochemical Cycles http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-937 doi:10.1029/2007GB002984 ark:/85065/d7ws8tfx An edited version of this paper was published by AGU. Copyright 2008 American Geophysical Union. Dust Iron Southern Hemisphere Text article 2008 ftncar https://doi.org/10.1029/2007GB002984 2023-07-17T18:37:01Z 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⁻³ for SEPS and 13.0 ± 6.3 ng m⁻³ for SOKS. Dust fluxes, derived from those concentrations, were 9.9 ± 3.7 μg m⁻³ d⁻³ for SEPS and 38 ± 14 μg m⁻³ d⁻³ 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 OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Pacific Southern Ocean Global Biogeochemical Cycles 22 2 n/a n/a |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
topic |
Dust Iron Southern Hemisphere |
spellingShingle |
Dust Iron Southern Hemisphere Revisiting atmospheric dust export to the Southern Hemisphere ocean: Biogeochemical implications |
topic_facet |
Dust Iron Southern Hemisphere |
description |
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⁻³ for SEPS and 13.0 ± 6.3 ng m⁻³ for SOKS. Dust fluxes, derived from those concentrations, were 9.9 ± 3.7 μg m⁻³ d⁻³ for SEPS and 38 ± 14 μg m⁻³ d⁻³ 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 |
Wagener, Thibaut (author) Guieru, Cécile (author) Losno, Rémi (author) Bonnet, Sophie (author) Mahowald, Natalie (author) |
format |
Article in Journal/Newspaper |
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 |
American Geophysical Union |
publishDate |
2008 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-937 https://doi.org/10.1029/2007GB002984 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
Global Biogeochemical Cycles http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-937 doi:10.1029/2007GB002984 ark:/85065/d7ws8tfx |
op_rights |
An edited version of this paper was published by AGU. Copyright 2008 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2007GB002984 |
container_title |
Global Biogeochemical Cycles |
container_volume |
22 |
container_issue |
2 |
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n/a |
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n/a |
_version_ |
1772820065235763200 |