Direct measurements of atmospheric iron, cobalt, and aluminum-derived dust deposition at Kerguelen Islands
International audience [1] Atmospheric deposition is one of the major sources of nutrients bringing trace metals to remote marine biota. In this study, total atmospheric deposition and crustal aerosol concentrations were monitored at Kerguelen Islands (49 18′S; 70 07′E) in the Southern Ocean during...
Published in: | Global Biogeochemical Cycles |
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Main Authors: | , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal.archives-ouvertes.fr/hal-02903286 https://hal.archives-ouvertes.fr/hal-02903286/document https://hal.archives-ouvertes.fr/hal-02903286/file/2012GB004301.pdf https://doi.org/10.1029/2012GB004301 |
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ftunivnantes:oai:HAL:hal-02903286v1 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Heimburger, A. Losno, R. Triquet, S. Dulac, F. Mahowald, N. Direct measurements of atmospheric iron, cobalt, and aluminum-derived dust deposition at Kerguelen Islands |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience [1] Atmospheric deposition is one of the major sources of nutrients bringing trace metals to remote marine biota. In this study, total atmospheric deposition and crustal aerosol concentrations were monitored at Kerguelen Islands (49 18′S; 70 07′E) in the Southern Ocean during a short campaign in early 2005 and then continuously for about 2 years (2009-2010). Results show very low levels of atmospheric dust and trace metals concentrations but higher deposition fluxes than expected. The averaged total dust deposition flux as derived from Al deposition measurements is 659 mg m À2 d À1. Simultaneously measured Fe and Co deposition fluxes are respectively 29 mg m À2 d À1 (520 nmol m À2 d À1) and 0.014 mg m À2 d À1 (0.24 nmol m À2 d À1), giving typically crustal elemental ratios to Al of 0.54 and 2.6 10 À4. Measured dust deposition is in relatively good agreement with those simulated by current atmospheric models, but suggest that previous indirect calculations from field experiments are too low by a factor of 20. Observations and model results show that dust is transported above the marine atmospheric boundary layer to Kerguelen Islands, and thus that surface concentrations are not representative of the total dust column. Indeed, using surface concentrations leads to very large computed wet scavenging ratios, and to the conclusion that it is not appropriate to derive deposition fluxes from surface concentrations at remote ocean sites. |
author2 |
Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Chimie Atmosphérique Expérimentale (CAE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Cornell University New York |
format |
Article in Journal/Newspaper |
author |
Heimburger, A. Losno, R. Triquet, S. Dulac, F. Mahowald, N. |
author_facet |
Heimburger, A. Losno, R. Triquet, S. Dulac, F. Mahowald, N. |
author_sort |
Heimburger, A. |
title |
Direct measurements of atmospheric iron, cobalt, and aluminum-derived dust deposition at Kerguelen Islands |
title_short |
Direct measurements of atmospheric iron, cobalt, and aluminum-derived dust deposition at Kerguelen Islands |
title_full |
Direct measurements of atmospheric iron, cobalt, and aluminum-derived dust deposition at Kerguelen Islands |
title_fullStr |
Direct measurements of atmospheric iron, cobalt, and aluminum-derived dust deposition at Kerguelen Islands |
title_full_unstemmed |
Direct measurements of atmospheric iron, cobalt, and aluminum-derived dust deposition at Kerguelen Islands |
title_sort |
direct measurements of atmospheric iron, cobalt, and aluminum-derived dust deposition at kerguelen islands |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.archives-ouvertes.fr/hal-02903286 https://hal.archives-ouvertes.fr/hal-02903286/document https://hal.archives-ouvertes.fr/hal-02903286/file/2012GB004301.pdf https://doi.org/10.1029/2012GB004301 |
geographic |
Kerguelen Kerguelen Islands Southern Ocean |
geographic_facet |
Kerguelen Kerguelen Islands Southern Ocean |
genre |
Kerguelen Islands Southern Ocean |
genre_facet |
Kerguelen Islands Southern Ocean |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.archives-ouvertes.fr/hal-02903286 Global Biogeochemical Cycles, American Geophysical Union, 2012, 26 (4), pp.n/a-n/a. ⟨10.1029/2012GB004301⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2012GB004301 hal-02903286 https://hal.archives-ouvertes.fr/hal-02903286 https://hal.archives-ouvertes.fr/hal-02903286/document https://hal.archives-ouvertes.fr/hal-02903286/file/2012GB004301.pdf doi:10.1029/2012GB004301 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2012GB004301 |
container_title |
Global Biogeochemical Cycles |
container_volume |
26 |
container_issue |
4 |
_version_ |
1766055251031359488 |
spelling |
ftunivnantes:oai:HAL:hal-02903286v1 2023-05-15T17:02:02+02:00 Direct measurements of atmospheric iron, cobalt, and aluminum-derived dust deposition at Kerguelen Islands Heimburger, A. Losno, R. Triquet, S. Dulac, F. Mahowald, N. Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Chimie Atmosphérique Expérimentale (CAE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Cornell University New York 2012-12 https://hal.archives-ouvertes.fr/hal-02903286 https://hal.archives-ouvertes.fr/hal-02903286/document https://hal.archives-ouvertes.fr/hal-02903286/file/2012GB004301.pdf https://doi.org/10.1029/2012GB004301 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2012GB004301 hal-02903286 https://hal.archives-ouvertes.fr/hal-02903286 https://hal.archives-ouvertes.fr/hal-02903286/document https://hal.archives-ouvertes.fr/hal-02903286/file/2012GB004301.pdf doi:10.1029/2012GB004301 info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.archives-ouvertes.fr/hal-02903286 Global Biogeochemical Cycles, American Geophysical Union, 2012, 26 (4), pp.n/a-n/a. ⟨10.1029/2012GB004301⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2012 ftunivnantes https://doi.org/10.1029/2012GB004301 2022-08-10T02:47:47Z International audience [1] Atmospheric deposition is one of the major sources of nutrients bringing trace metals to remote marine biota. In this study, total atmospheric deposition and crustal aerosol concentrations were monitored at Kerguelen Islands (49 18′S; 70 07′E) in the Southern Ocean during a short campaign in early 2005 and then continuously for about 2 years (2009-2010). Results show very low levels of atmospheric dust and trace metals concentrations but higher deposition fluxes than expected. The averaged total dust deposition flux as derived from Al deposition measurements is 659 mg m À2 d À1. Simultaneously measured Fe and Co deposition fluxes are respectively 29 mg m À2 d À1 (520 nmol m À2 d À1) and 0.014 mg m À2 d À1 (0.24 nmol m À2 d À1), giving typically crustal elemental ratios to Al of 0.54 and 2.6 10 À4. Measured dust deposition is in relatively good agreement with those simulated by current atmospheric models, but suggest that previous indirect calculations from field experiments are too low by a factor of 20. Observations and model results show that dust is transported above the marine atmospheric boundary layer to Kerguelen Islands, and thus that surface concentrations are not representative of the total dust column. Indeed, using surface concentrations leads to very large computed wet scavenging ratios, and to the conclusion that it is not appropriate to derive deposition fluxes from surface concentrations at remote ocean sites. Article in Journal/Newspaper Kerguelen Islands Southern Ocean Université de Nantes: HAL-UNIV-NANTES Kerguelen Kerguelen Islands Southern Ocean Global Biogeochemical Cycles 26 4 |