Natural variability of the atmospheric composition and anthropogenic influence in Patagonia. Contribution to the understanding of transport pathways along the Equator-Mid latitudes-Pole transect
Although tropical and subtropical South America play an important role in atmospheric global and hemispheric chemistry due to the coexistence of big reservoirs with large-scale atmospheric patterns, exchanges between tropics and higher latitudes have remained poorly documented. During the last few d...
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Other Authors: | , , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
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HAL CCSD
2011
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Online Access: | https://theses.hal.science/tel-00586842 https://theses.hal.science/tel-00586842v2/document https://theses.hal.science/tel-00586842v2/file/Moreno-Isabel-2011-archivage-v3.pdf |
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ftunigrenoble:oai:HAL:tel-00586842v2 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
French |
topic |
ice-core chemistry climate Patagonia southern hemisphere atmosphere anthropogenic carotte de glace climat Patagonie hemisphere sud anthropique [SDU.OCEAN]Sciences of the Universe [physics]/Ocean |
spellingShingle |
ice-core chemistry climate Patagonia southern hemisphere atmosphere anthropogenic carotte de glace climat Patagonie hemisphere sud anthropique [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Moreno, Isabel Natural variability of the atmospheric composition and anthropogenic influence in Patagonia. Contribution to the understanding of transport pathways along the Equator-Mid latitudes-Pole transect |
topic_facet |
ice-core chemistry climate Patagonia southern hemisphere atmosphere anthropogenic carotte de glace climat Patagonie hemisphere sud anthropique [SDU.OCEAN]Sciences of the Universe [physics]/Ocean |
description |
Although tropical and subtropical South America play an important role in atmospheric global and hemispheric chemistry due to the coexistence of big reservoirs with large-scale atmospheric patterns, exchanges between tropics and higher latitudes have remained poorly documented. During the last few decades, the study of past climate and atmospheric composition has benefited greatly by information provided by ice core analysis. In the Southern Hemisphere, a large amount of data is now available from polar ice cores and more recently from ice cores recovered in the Andes. Despite a few studies on climate reconstruction, there is a lack of information on past atmospheric composition in Southern mid-latitudes, in terms of both natural variability and anthropogenic impact. This work is based on the analysis of a 122 m ice core extracted from a high altitude site in the Northern Patagonian Icefield (Monte San Valentin 46◦ 35′ S, 73◦ 19′ W, summit at 4032 m.a.s.l., drilling plateau at 3723 m.a.s.l.). Besides high-resolution measurements of mineral and organic ions, a study of the precipitation events likely to influence the site was conducted in order to provide a basis for the interpretation of the ice archive. The selected site registers precipitation events of marine and continental origin. We have demonstrated that marine primary and biogenic contributions are not synchronous and they are very likely underrepresented along the ice archive due to the effect of accumulation processes. Contrary to sea salt, a significant part of marine biogenic aerosol is associated with a complex and diluted continental fingerprint. The continental imprint was studied in terms of background trends and major events involving combustion processes, urban pollution, volcanic and soil emissions. This set of mixed sources is responsible for almost half of the total sulfate input. This important and ubiquitous sulfate concentration is related to that of nitrate and chloride and its understanding in terms of sources and transport needs further ... |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) 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 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)-Centre National de la Recherche Scientifique (CNRS) Université de Grenoble Jean Robert Petit(petit@lgge.obs.ujf-grenoble.fr) SANVALLOR |
format |
Doctoral or Postdoctoral Thesis |
author |
Moreno, Isabel |
author_facet |
Moreno, Isabel |
author_sort |
Moreno, Isabel |
title |
Natural variability of the atmospheric composition and anthropogenic influence in Patagonia. Contribution to the understanding of transport pathways along the Equator-Mid latitudes-Pole transect |
title_short |
Natural variability of the atmospheric composition and anthropogenic influence in Patagonia. Contribution to the understanding of transport pathways along the Equator-Mid latitudes-Pole transect |
title_full |
Natural variability of the atmospheric composition and anthropogenic influence in Patagonia. Contribution to the understanding of transport pathways along the Equator-Mid latitudes-Pole transect |
title_fullStr |
Natural variability of the atmospheric composition and anthropogenic influence in Patagonia. Contribution to the understanding of transport pathways along the Equator-Mid latitudes-Pole transect |
title_full_unstemmed |
Natural variability of the atmospheric composition and anthropogenic influence in Patagonia. Contribution to the understanding of transport pathways along the Equator-Mid latitudes-Pole transect |
title_sort |
natural variability of the atmospheric composition and anthropogenic influence in patagonia. contribution to the understanding of transport pathways along the equator-mid latitudes-pole transect |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://theses.hal.science/tel-00586842 https://theses.hal.science/tel-00586842v2/document https://theses.hal.science/tel-00586842v2/file/Moreno-Isabel-2011-archivage-v3.pdf |
geographic |
Patagonia |
geographic_facet |
Patagonia |
genre |
ice core |
genre_facet |
ice core |
op_source |
https://theses.hal.science/tel-00586842 Océan, Atmosphère. Université de Grenoble, 2011. Français. ⟨NNT : ⟩ |
op_relation |
tel-00586842 https://theses.hal.science/tel-00586842 https://theses.hal.science/tel-00586842v2/document https://theses.hal.science/tel-00586842v2/file/Moreno-Isabel-2011-archivage-v3.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1798847457849769984 |
spelling |
ftunigrenoble:oai:HAL:tel-00586842v2 2024-05-12T08:05:12+00:00 Natural variability of the atmospheric composition and anthropogenic influence in Patagonia. Contribution to the understanding of transport pathways along the Equator-Mid latitudes-Pole transect Variabilité naturelle de la composition atmosphérique et influence anthropique en Patagonie. Contribution à l'étude des transports Equateur-Moyennes latitudes-Pôle Moreno, Isabel Laboratoire de glaciologie et géophysique de l'environnement (LGGE) 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 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)-Centre National de la Recherche Scientifique (CNRS) Université de Grenoble Jean Robert Petit(petit@lgge.obs.ujf-grenoble.fr) SANVALLOR 2011-01-19 https://theses.hal.science/tel-00586842 https://theses.hal.science/tel-00586842v2/document https://theses.hal.science/tel-00586842v2/file/Moreno-Isabel-2011-archivage-v3.pdf fr fre HAL CCSD tel-00586842 https://theses.hal.science/tel-00586842 https://theses.hal.science/tel-00586842v2/document https://theses.hal.science/tel-00586842v2/file/Moreno-Isabel-2011-archivage-v3.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00586842 Océan, Atmosphère. Université de Grenoble, 2011. Français. ⟨NNT : ⟩ ice-core chemistry climate Patagonia southern hemisphere atmosphere anthropogenic carotte de glace climat Patagonie hemisphere sud anthropique [SDU.OCEAN]Sciences of the Universe [physics]/Ocean info:eu-repo/semantics/doctoralThesis Theses 2011 ftunigrenoble 2024-04-18T02:28:26Z Although tropical and subtropical South America play an important role in atmospheric global and hemispheric chemistry due to the coexistence of big reservoirs with large-scale atmospheric patterns, exchanges between tropics and higher latitudes have remained poorly documented. During the last few decades, the study of past climate and atmospheric composition has benefited greatly by information provided by ice core analysis. In the Southern Hemisphere, a large amount of data is now available from polar ice cores and more recently from ice cores recovered in the Andes. Despite a few studies on climate reconstruction, there is a lack of information on past atmospheric composition in Southern mid-latitudes, in terms of both natural variability and anthropogenic impact. This work is based on the analysis of a 122 m ice core extracted from a high altitude site in the Northern Patagonian Icefield (Monte San Valentin 46◦ 35′ S, 73◦ 19′ W, summit at 4032 m.a.s.l., drilling plateau at 3723 m.a.s.l.). Besides high-resolution measurements of mineral and organic ions, a study of the precipitation events likely to influence the site was conducted in order to provide a basis for the interpretation of the ice archive. The selected site registers precipitation events of marine and continental origin. We have demonstrated that marine primary and biogenic contributions are not synchronous and they are very likely underrepresented along the ice archive due to the effect of accumulation processes. Contrary to sea salt, a significant part of marine biogenic aerosol is associated with a complex and diluted continental fingerprint. The continental imprint was studied in terms of background trends and major events involving combustion processes, urban pollution, volcanic and soil emissions. This set of mixed sources is responsible for almost half of the total sulfate input. This important and ubiquitous sulfate concentration is related to that of nitrate and chloride and its understanding in terms of sources and transport needs further ... Doctoral or Postdoctoral Thesis ice core Université Grenoble Alpes: HAL Patagonia |