Etude de la composition chimique de la basse atmosphère des régions cotières antarctiques (station française de Dumont d'Urville)- Antarctique
The geographical and meteorological conditions of polar regions make them of the utmost interest for many environmental studies. Located far away trom continents ( where local sources like wind blow dust, biospheric emissions from vegetation and soils or anthropegenic sources dominate) Antarctic reg...
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Other Authors: | , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
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HAL CCSD
1996
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Online Access: | https://tel.archives-ouvertes.fr/tel-00766849 https://tel.archives-ouvertes.fr/tel-00766849/document https://tel.archives-ouvertes.fr/tel-00766849/file/These-Ducroz-1996.pdf |
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ftccsdartic:oai:HAL:tel-00766849v1 |
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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 |
French |
topic |
troposphère chimie prélèvements atmosphériques [SDE.IE]Environmental Sciences/Environmental Engineering |
spellingShingle |
troposphère chimie prélèvements atmosphériques [SDE.IE]Environmental Sciences/Environmental Engineering Ducroz, François Etude de la composition chimique de la basse atmosphère des régions cotières antarctiques (station française de Dumont d'Urville)- Antarctique |
topic_facet |
troposphère chimie prélèvements atmosphériques [SDE.IE]Environmental Sciences/Environmental Engineering |
description |
The geographical and meteorological conditions of polar regions make them of the utmost interest for many environmental studies. Located far away trom continents ( where local sources like wind blow dust, biospheric emissions from vegetation and soils or anthropegenic sources dominate) Antarctic regions have been recognized as having the cleanest atmospheric environment of Southern hemisphere. ln this context, coastal Antarctic areas are particulary well adapted for studying the biogenic emissions from the circumpolar ocean. At the end of 1990, a european program was etablished for the thorough tropospheric chemistry study at the french station (Dumont d' Urville) in Antarctica.The fust part of our study concerned the potential contamination of our site by the base (Dumont d'Urville). It should that the humain activity has a low impact on our sampling, while nearby pingouins rookeries were emitting large amounts of NH3, NH4+, C2O42-, Ca2+, K+, in the atmosphere. The study of atmospheric sulphur species (sulfate and methanesulfonate) showed that sea salt aerosols are fractionned during the winter. The sulfate concentrations in these aerosols are depleted compared to sea water concentrations. Moreover, the Cl-/ Na + ratio are higher in these fractionned aerosols than in sea water. The inter annual variability of atmospheric sulfate concentrations showed a perturbation during the 1991-1992 austral summer. This perturbation is attribued to the gravitational sedimentation of the volcanic plume emitted by the Cerro Hudson eruption. The seasonnality of methanesulfonic acid and non sea salt sulfate is linked to the biological primary productivity of the austral ocean. Also, we demonstrated that the differences in atmospheric concentrations between Dumont d'Urville, Mawson and Georg von Neumayer could be explain by differences in the primary productivity in the sectors of the polar ocean influencing each station. Finally, the atmospheric concentrations of nitrogen species (NH4+, N03-, HN03) suggest that ammonium ... |
author2 |
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) Université Joseph-Fourier - Grenoble I Michel Legrand |
format |
Doctoral or Postdoctoral Thesis |
author |
Ducroz, François |
author_facet |
Ducroz, François |
author_sort |
Ducroz, François |
title |
Etude de la composition chimique de la basse atmosphère des régions cotières antarctiques (station française de Dumont d'Urville)- Antarctique |
title_short |
Etude de la composition chimique de la basse atmosphère des régions cotières antarctiques (station française de Dumont d'Urville)- Antarctique |
title_full |
Etude de la composition chimique de la basse atmosphère des régions cotières antarctiques (station française de Dumont d'Urville)- Antarctique |
title_fullStr |
Etude de la composition chimique de la basse atmosphère des régions cotières antarctiques (station française de Dumont d'Urville)- Antarctique |
title_full_unstemmed |
Etude de la composition chimique de la basse atmosphère des régions cotières antarctiques (station française de Dumont d'Urville)- Antarctique |
title_sort |
etude de la composition chimique de la basse atmosphère des régions cotières antarctiques (station française de dumont d'urville)- antarctique |
publisher |
HAL CCSD |
publishDate |
1996 |
url |
https://tel.archives-ouvertes.fr/tel-00766849 https://tel.archives-ouvertes.fr/tel-00766849/document https://tel.archives-ouvertes.fr/tel-00766849/file/These-Ducroz-1996.pdf |
long_lat |
ENVELOPE(90.000,90.000,-60.000,-60.000) ENVELOPE(141.000,141.000,-66.000,-66.000) ENVELOPE(140.017,140.017,-66.667,-66.667) ENVELOPE(140.013,140.013,-66.667,-66.667) |
geographic |
Antarctic Austral Austral Ocean Base Dumont-d'Urville Dumont d'Urville Dumont-d'Urville Hudson Neumayer |
geographic_facet |
Antarctic Austral Austral Ocean Base Dumont-d'Urville Dumont d'Urville Dumont-d'Urville Hudson Neumayer |
genre |
Antarc* Antarctic Antarctique* Austral Ocean |
genre_facet |
Antarc* Antarctic Antarctique* Austral Ocean |
op_source |
https://tel.archives-ouvertes.fr/tel-00766849 Ingénierie de l'environnement. Université Joseph-Fourier - Grenoble I, 1996. Français |
op_relation |
tel-00766849 https://tel.archives-ouvertes.fr/tel-00766849 https://tel.archives-ouvertes.fr/tel-00766849/document https://tel.archives-ouvertes.fr/tel-00766849/file/These-Ducroz-1996.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766274957020495872 |
spelling |
ftccsdartic:oai:HAL:tel-00766849v1 2023-05-15T14:04:01+02:00 Etude de la composition chimique de la basse atmosphère des régions cotières antarctiques (station française de Dumont d'Urville)- Antarctique Ducroz, François 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) Université Joseph-Fourier - Grenoble I Michel Legrand 1996-03-15 https://tel.archives-ouvertes.fr/tel-00766849 https://tel.archives-ouvertes.fr/tel-00766849/document https://tel.archives-ouvertes.fr/tel-00766849/file/These-Ducroz-1996.pdf fr fre HAL CCSD tel-00766849 https://tel.archives-ouvertes.fr/tel-00766849 https://tel.archives-ouvertes.fr/tel-00766849/document https://tel.archives-ouvertes.fr/tel-00766849/file/These-Ducroz-1996.pdf info:eu-repo/semantics/OpenAccess https://tel.archives-ouvertes.fr/tel-00766849 Ingénierie de l'environnement. Université Joseph-Fourier - Grenoble I, 1996. Français troposphère chimie prélèvements atmosphériques [SDE.IE]Environmental Sciences/Environmental Engineering info:eu-repo/semantics/doctoralThesis Theses 1996 ftccsdartic 2021-10-24T15:37:54Z The geographical and meteorological conditions of polar regions make them of the utmost interest for many environmental studies. Located far away trom continents ( where local sources like wind blow dust, biospheric emissions from vegetation and soils or anthropegenic sources dominate) Antarctic regions have been recognized as having the cleanest atmospheric environment of Southern hemisphere. ln this context, coastal Antarctic areas are particulary well adapted for studying the biogenic emissions from the circumpolar ocean. At the end of 1990, a european program was etablished for the thorough tropospheric chemistry study at the french station (Dumont d' Urville) in Antarctica.The fust part of our study concerned the potential contamination of our site by the base (Dumont d'Urville). It should that the humain activity has a low impact on our sampling, while nearby pingouins rookeries were emitting large amounts of NH3, NH4+, C2O42-, Ca2+, K+, in the atmosphere. The study of atmospheric sulphur species (sulfate and methanesulfonate) showed that sea salt aerosols are fractionned during the winter. The sulfate concentrations in these aerosols are depleted compared to sea water concentrations. Moreover, the Cl-/ Na + ratio are higher in these fractionned aerosols than in sea water. The inter annual variability of atmospheric sulfate concentrations showed a perturbation during the 1991-1992 austral summer. This perturbation is attribued to the gravitational sedimentation of the volcanic plume emitted by the Cerro Hudson eruption. The seasonnality of methanesulfonic acid and non sea salt sulfate is linked to the biological primary productivity of the austral ocean. Also, we demonstrated that the differences in atmospheric concentrations between Dumont d'Urville, Mawson and Georg von Neumayer could be explain by differences in the primary productivity in the sectors of the polar ocean influencing each station. Finally, the atmospheric concentrations of nitrogen species (NH4+, N03-, HN03) suggest that ammonium ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctique* Austral Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Austral Austral Ocean ENVELOPE(90.000,90.000,-60.000,-60.000) Base Dumont-d'Urville ENVELOPE(141.000,141.000,-66.000,-66.000) Dumont d'Urville ENVELOPE(140.017,140.017,-66.667,-66.667) Dumont-d'Urville ENVELOPE(140.013,140.013,-66.667,-66.667) Hudson Neumayer |