Spatial distribution of biogenic sulphur compounds (MSA, nssSO42−) in the northern Victoria Land-Dome C-Wilkes Land area, East Antarctica
International audience During the 1992-2002 Antarctic expeditions, in the framework of the International Trans-Antarctic Expedition (ITASE) project, about 600 sites were sampled (superficial snow, snow pits and firn cores) along traverses in the northern Victoria Land-Dome C-Wilkes Land region. The...
Published in: | Annals of Glaciology |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2005
|
Subjects: | |
Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00373739 https://hal-insu.archives-ouvertes.fr/insu-00373739/document https://hal-insu.archives-ouvertes.fr/insu-00373739/file/div-class-title-spatial-distribution-of-biogenic-sulphur-compounds-msa-nssso-span-class-sub-4-span-span-class-sup-2-span-in-the-northern-victoria-land-dome-c-wilkes-land-area-east-antarctica-div.pdf https://doi.org/10.3189/172756405781813384 |
id |
ftccsdartic:oai:HAL:insu-00373739v1 |
---|---|
record_format |
openpolar |
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.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Becagli, Silvia Proposito, Marco Benassai, Silvia Gragnani, Roberto Magand, Olivier Traversi, Rita Udisti, Roberto Spatial distribution of biogenic sulphur compounds (MSA, nssSO42−) in the northern Victoria Land-Dome C-Wilkes Land area, East Antarctica |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience During the 1992-2002 Antarctic expeditions, in the framework of the International Trans-Antarctic Expedition (ITASE) project, about 600 sites were sampled (superficial snow, snow pits and firn cores) along traverses in the northern Victoria Land-Dome C-Wilkes Land region. The sites were characterized by different geographical (distance from the sea, altitude) and climatological (annual mean accumulation rate, temperature) conditions and were affected by air masses from different marine sectors (Ross Sea, Pacific Ocean). Mean anion and cation contents were calculated at each site, in order to evaluate the spatial distribution of chemical impurities in snow. Here we discuss the distribution of non-sea-salt sulphate (nssSO42−) and of methanesulphonic acid (MSA) mainly originating from atmospheric oxidation of biogenic dimethyl sulphide; these compounds play a key role in climate control processes by acting as cloud condensation nuclei. The spatial distribution of nssSO42− and MSA is discussed as a function of distance from the sea, altitude and accumulation rate. Depositional fluxes of nssSO42− and MSA decrease as a function of distance from the sea, with a higher gradient in the first 200 km step. There is an analogous trend with the site altitude, and the first 1600 m step is relevant in determining the nssSO42−and MSA content in snow. The nssSO42−/MSA ratio depends on the distance from the sea and the biogenic source strength. At coastal sites, where biogenic inputs are dominant, this ratio is ∼2. As biogenic input decreases (low MSA content) inland, the ratio increases, indicating the presence of alternative sources of nssSO42− (crustal, volcanic background) or advection of low-latitude air masses. By plotting total flux as a function of accumulation rate, dry depositional contributions were evaluated for nssSO42− and MSA in the Ross Sea and Pacific Ocean sectors. Non-sea-salt sulphate wet deposition prevails at sites where the accumulation rate (expressed as water equivalent) is higher ... |
author2 |
Department of Chemistry Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Becagli, Silvia Proposito, Marco Benassai, Silvia Gragnani, Roberto Magand, Olivier Traversi, Rita Udisti, Roberto |
author_facet |
Becagli, Silvia Proposito, Marco Benassai, Silvia Gragnani, Roberto Magand, Olivier Traversi, Rita Udisti, Roberto |
author_sort |
Becagli, Silvia |
title |
Spatial distribution of biogenic sulphur compounds (MSA, nssSO42−) in the northern Victoria Land-Dome C-Wilkes Land area, East Antarctica |
title_short |
Spatial distribution of biogenic sulphur compounds (MSA, nssSO42−) in the northern Victoria Land-Dome C-Wilkes Land area, East Antarctica |
title_full |
Spatial distribution of biogenic sulphur compounds (MSA, nssSO42−) in the northern Victoria Land-Dome C-Wilkes Land area, East Antarctica |
title_fullStr |
Spatial distribution of biogenic sulphur compounds (MSA, nssSO42−) in the northern Victoria Land-Dome C-Wilkes Land area, East Antarctica |
title_full_unstemmed |
Spatial distribution of biogenic sulphur compounds (MSA, nssSO42−) in the northern Victoria Land-Dome C-Wilkes Land area, East Antarctica |
title_sort |
spatial distribution of biogenic sulphur compounds (msa, nssso42−) in the northern victoria land-dome c-wilkes land area, east antarctica |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00373739 https://hal-insu.archives-ouvertes.fr/insu-00373739/document https://hal-insu.archives-ouvertes.fr/insu-00373739/file/div-class-title-spatial-distribution-of-biogenic-sulphur-compounds-msa-nssso-span-class-sub-4-span-span-class-sup-2-span-in-the-northern-victoria-land-dome-c-wilkes-land-area-east-antarctica-div.pdf https://doi.org/10.3189/172756405781813384 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Antarctic East Antarctica Pacific Ross Sea Victoria Land Wilkes Land |
geographic_facet |
Antarctic East Antarctica Pacific Ross Sea Victoria Land Wilkes Land |
genre |
Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica Ross Sea Victoria Land Wilkes Land |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica Ross Sea Victoria Land Wilkes Land |
op_source |
ISSN: 0260-3055 Annals of Glaciology https://hal-insu.archives-ouvertes.fr/insu-00373739 Annals of Glaciology, International Glaciological Society, 2005, 41 (1), pp.23 à 31. ⟨10.3189/172756405781813384⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/172756405781813384 insu-00373739 https://hal-insu.archives-ouvertes.fr/insu-00373739 https://hal-insu.archives-ouvertes.fr/insu-00373739/document https://hal-insu.archives-ouvertes.fr/insu-00373739/file/div-class-title-spatial-distribution-of-biogenic-sulphur-compounds-msa-nssso-span-class-sub-4-span-span-class-sup-2-span-in-the-northern-victoria-land-dome-c-wilkes-land-area-east-antarctica-div.pdf doi:10.3189/172756405781813384 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3189/172756405781813384 |
container_title |
Annals of Glaciology |
container_volume |
41 |
container_start_page |
23 |
op_container_end_page |
31 |
_version_ |
1766001616554557440 |
spelling |
ftccsdartic:oai:HAL:insu-00373739v1 2023-05-15T13:29:38+02:00 Spatial distribution of biogenic sulphur compounds (MSA, nssSO42−) in the northern Victoria Land-Dome C-Wilkes Land area, East Antarctica Becagli, Silvia Proposito, Marco Benassai, Silvia Gragnani, Roberto Magand, Olivier Traversi, Rita Udisti, Roberto Department of Chemistry Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) 2005 https://hal-insu.archives-ouvertes.fr/insu-00373739 https://hal-insu.archives-ouvertes.fr/insu-00373739/document https://hal-insu.archives-ouvertes.fr/insu-00373739/file/div-class-title-spatial-distribution-of-biogenic-sulphur-compounds-msa-nssso-span-class-sub-4-span-span-class-sup-2-span-in-the-northern-victoria-land-dome-c-wilkes-land-area-east-antarctica-div.pdf https://doi.org/10.3189/172756405781813384 en eng HAL CCSD International Glaciological Society info:eu-repo/semantics/altIdentifier/doi/10.3189/172756405781813384 insu-00373739 https://hal-insu.archives-ouvertes.fr/insu-00373739 https://hal-insu.archives-ouvertes.fr/insu-00373739/document https://hal-insu.archives-ouvertes.fr/insu-00373739/file/div-class-title-spatial-distribution-of-biogenic-sulphur-compounds-msa-nssso-span-class-sub-4-span-span-class-sup-2-span-in-the-northern-victoria-land-dome-c-wilkes-land-area-east-antarctica-div.pdf doi:10.3189/172756405781813384 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0260-3055 Annals of Glaciology https://hal-insu.archives-ouvertes.fr/insu-00373739 Annals of Glaciology, International Glaciological Society, 2005, 41 (1), pp.23 à 31. ⟨10.3189/172756405781813384⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2005 ftccsdartic https://doi.org/10.3189/172756405781813384 2021-10-23T23:43:32Z International audience During the 1992-2002 Antarctic expeditions, in the framework of the International Trans-Antarctic Expedition (ITASE) project, about 600 sites were sampled (superficial snow, snow pits and firn cores) along traverses in the northern Victoria Land-Dome C-Wilkes Land region. The sites were characterized by different geographical (distance from the sea, altitude) and climatological (annual mean accumulation rate, temperature) conditions and were affected by air masses from different marine sectors (Ross Sea, Pacific Ocean). Mean anion and cation contents were calculated at each site, in order to evaluate the spatial distribution of chemical impurities in snow. Here we discuss the distribution of non-sea-salt sulphate (nssSO42−) and of methanesulphonic acid (MSA) mainly originating from atmospheric oxidation of biogenic dimethyl sulphide; these compounds play a key role in climate control processes by acting as cloud condensation nuclei. The spatial distribution of nssSO42− and MSA is discussed as a function of distance from the sea, altitude and accumulation rate. Depositional fluxes of nssSO42− and MSA decrease as a function of distance from the sea, with a higher gradient in the first 200 km step. There is an analogous trend with the site altitude, and the first 1600 m step is relevant in determining the nssSO42−and MSA content in snow. The nssSO42−/MSA ratio depends on the distance from the sea and the biogenic source strength. At coastal sites, where biogenic inputs are dominant, this ratio is ∼2. As biogenic input decreases (low MSA content) inland, the ratio increases, indicating the presence of alternative sources of nssSO42− (crustal, volcanic background) or advection of low-latitude air masses. By plotting total flux as a function of accumulation rate, dry depositional contributions were evaluated for nssSO42− and MSA in the Ross Sea and Pacific Ocean sectors. Non-sea-salt sulphate wet deposition prevails at sites where the accumulation rate (expressed as water equivalent) is higher ... Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica Ross Sea Victoria Land Wilkes Land Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic East Antarctica Pacific Ross Sea Victoria Land Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Annals of Glaciology 41 23 31 |