Meteorological regime of central Antarctica and its role in the formation of isotope composition of snow thickness
The main goals of the present study are, first, determination of the relationship between local air temperature and snow isotope composition at Vostok Station (East Antarctica) and, second, reconstruction of climatic variability in this area over the past 200 years. Experimental basis of the study i...
Main Author: | |
---|---|
Other Authors: | , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
HAL CCSD
2003
|
Subjects: | |
Online Access: | https://tel.archives-ouvertes.fr/tel-00701466 https://tel.archives-ouvertes.fr/tel-00701466/document https://tel.archives-ouvertes.fr/tel-00701466/file/These-Ekaykin-2003.pdf |
id |
ftccsdartic:oai:HAL:tel-00701466v1 |
---|---|
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 |
composition isotopique neige Vostok Antarctique régime météorologique microrelief variations saisonnières [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
composition isotopique neige Vostok Antarctique régime météorologique microrelief variations saisonnières [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDV.EE]Life Sciences [q-bio]/Ecology environment Ekaykin, Alexey Meteorological regime of central Antarctica and its role in the formation of isotope composition of snow thickness |
topic_facet |
composition isotopique neige Vostok Antarctique régime météorologique microrelief variations saisonnières [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
The main goals of the present study are, first, determination of the relationship between local air temperature and snow isotope composition at Vostok Station (East Antarctica) and, second, reconstruction of climatic variability in this area over the past 200 years. Experimental basis of the study includes data on isotope composition and accumulation rate of snow from 6 shallow and 2 deep snow pits dug in the Vostok's vicinities during summer seasons 1998/99, 1999/2000 and 2001/02. Meteorological regime is documented by the results of instrumental meteorological and balloon-sounding observations being carried out at Vostok since December 1957 and archived in Arctic and Antarctic Research Institute (St. Petersburg, Russia). We also used the data on snow accumulation at the stake network constructed near the station in 1970, documented spatial distribution of surface snow isotope composition and studied variations of isotope composition in precipitating and blowing snow collected from December 1999 to December 2000. By comparing meteorological and snow accumulation data, it has been established that most of precipitation in central Antarctica form under clear-sky conditions (diamond dust). Balloon-sounding data suggests that overall condensation temperature at Vostok does not significantly differ from the temperature at the top of the inversion layer. Temporal variability of isotope composition in a single point is dominated by influence of snow relief (micro-relief, "meso-dunes" and possibly mega-dunes), which substantially diminishes the signalto-noise ratio. Seasonal variations of isotope composition of the precipitation closely follow those of the local temperature, though the influence of moisture source is also evident from the intra-annual changes of deuterium excess content. Significant linear relationship is observed for the last 40 years between stacked series of snow isotope composition from pits and surface air temperature for the multi-decadal time-scale, while shorter (10-year) isotope variability is ... |
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) Faculté de géographie de Saint Pétersbourg Jean Robert Petit;Pavel Arapov |
format |
Doctoral or Postdoctoral Thesis |
author |
Ekaykin, Alexey |
author_facet |
Ekaykin, Alexey |
author_sort |
Ekaykin, Alexey |
title |
Meteorological regime of central Antarctica and its role in the formation of isotope composition of snow thickness |
title_short |
Meteorological regime of central Antarctica and its role in the formation of isotope composition of snow thickness |
title_full |
Meteorological regime of central Antarctica and its role in the formation of isotope composition of snow thickness |
title_fullStr |
Meteorological regime of central Antarctica and its role in the formation of isotope composition of snow thickness |
title_full_unstemmed |
Meteorological regime of central Antarctica and its role in the formation of isotope composition of snow thickness |
title_sort |
meteorological regime of central antarctica and its role in the formation of isotope composition of snow thickness |
publisher |
HAL CCSD |
publishDate |
2003 |
url |
https://tel.archives-ouvertes.fr/tel-00701466 https://tel.archives-ouvertes.fr/tel-00701466/document https://tel.archives-ouvertes.fr/tel-00701466/file/These-Ekaykin-2003.pdf |
long_lat |
ENVELOPE(106.837,106.837,-78.464,-78.464) |
geographic |
Antarctic Arctic East Antarctica Vostok Station |
geographic_facet |
Antarctic Arctic East Antarctica Vostok Station |
genre |
Antarc* Antarctic Antarctica Antarctique* Arctic and Antarctic Research Institute Arctic East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Antarctique* Arctic and Antarctic Research Institute Arctic East Antarctica |
op_source |
https://tel.archives-ouvertes.fr/tel-00701466 Glaciology. Faculté de géographie de Saint Pétersbourg, 2003. English |
op_relation |
tel-00701466 https://tel.archives-ouvertes.fr/tel-00701466 https://tel.archives-ouvertes.fr/tel-00701466/document https://tel.archives-ouvertes.fr/tel-00701466/file/These-Ekaykin-2003.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766055844814782464 |
spelling |
ftccsdartic:oai:HAL:tel-00701466v1 2023-05-15T13:34:41+02:00 Meteorological regime of central Antarctica and its role in the formation of isotope composition of snow thickness Régime météorologique de l'Antarctique central et son rôle dans la composition isotopique de la neige Ekaykin, Alexey 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) Faculté de géographie de Saint Pétersbourg Jean Robert Petit;Pavel Arapov 2003-10-23 https://tel.archives-ouvertes.fr/tel-00701466 https://tel.archives-ouvertes.fr/tel-00701466/document https://tel.archives-ouvertes.fr/tel-00701466/file/These-Ekaykin-2003.pdf en eng HAL CCSD tel-00701466 https://tel.archives-ouvertes.fr/tel-00701466 https://tel.archives-ouvertes.fr/tel-00701466/document https://tel.archives-ouvertes.fr/tel-00701466/file/These-Ekaykin-2003.pdf info:eu-repo/semantics/OpenAccess https://tel.archives-ouvertes.fr/tel-00701466 Glaciology. Faculté de géographie de Saint Pétersbourg, 2003. English composition isotopique neige Vostok Antarctique régime météorologique microrelief variations saisonnières [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/doctoralThesis Theses 2003 ftccsdartic 2021-10-24T16:26:52Z The main goals of the present study are, first, determination of the relationship between local air temperature and snow isotope composition at Vostok Station (East Antarctica) and, second, reconstruction of climatic variability in this area over the past 200 years. Experimental basis of the study includes data on isotope composition and accumulation rate of snow from 6 shallow and 2 deep snow pits dug in the Vostok's vicinities during summer seasons 1998/99, 1999/2000 and 2001/02. Meteorological regime is documented by the results of instrumental meteorological and balloon-sounding observations being carried out at Vostok since December 1957 and archived in Arctic and Antarctic Research Institute (St. Petersburg, Russia). We also used the data on snow accumulation at the stake network constructed near the station in 1970, documented spatial distribution of surface snow isotope composition and studied variations of isotope composition in precipitating and blowing snow collected from December 1999 to December 2000. By comparing meteorological and snow accumulation data, it has been established that most of precipitation in central Antarctica form under clear-sky conditions (diamond dust). Balloon-sounding data suggests that overall condensation temperature at Vostok does not significantly differ from the temperature at the top of the inversion layer. Temporal variability of isotope composition in a single point is dominated by influence of snow relief (micro-relief, "meso-dunes" and possibly mega-dunes), which substantially diminishes the signalto-noise ratio. Seasonal variations of isotope composition of the precipitation closely follow those of the local temperature, though the influence of moisture source is also evident from the intra-annual changes of deuterium excess content. Significant linear relationship is observed for the last 40 years between stacked series of snow isotope composition from pits and surface air temperature for the multi-decadal time-scale, while shorter (10-year) isotope variability is ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctica Antarctique* Arctic and Antarctic Research Institute Arctic East Antarctica Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Arctic East Antarctica Vostok Station ENVELOPE(106.837,106.837,-78.464,-78.464) |