Ice core evidence for secular variability and 200-year dipolar oscillations in atmospheric circulation over East Antarctica during the Holocene
International audience Two Holocene ice core records from East Antarctica (Vostok and EPICA-Dome C) were analysed for dust concentration and size distribution at a temporal resolution of 1 sample per ~50 years. A series of volcanic markers randomly distributed over the common part of the ice cores (...
Published in: | Climate Dynamics |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2005
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Online Access: | https://insu.hal.science/insu-00374150 https://doi.org/10.1007/s00382-005-0012-9 |
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ftuniversailles:oai:HAL:insu-00374150v1 |
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Open Polar |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
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ftuniversailles |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
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[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Delmonte, B. Petit, Jean-Robert Krinner, Gerhard Maggi, W. Jouzel, Jean Udisti, Roberto Ice core evidence for secular variability and 200-year dipolar oscillations in atmospheric circulation over East Antarctica during the Holocene |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Two Holocene ice core records from East Antarctica (Vostok and EPICA-Dome C) were analysed for dust concentration and size distribution at a temporal resolution of 1 sample per ~50 years. A series of volcanic markers randomly distributed over the common part of the ice cores (from 9.8 to 3.5 kyear BP) ensures accurate relative dating (±33 years). Dust-size records from the two sites display oscillations structured in cycles with sub-millennial and secular scale frequencies that are apparently asynchronous. The power spectra of the composite sum (Σ) of the two dust-size records display spectral energy mostly for 150- to 500-year periodicities. On the other hand, the 200-year band is common to both records and the 200 year components of the two sites are out-of-phase (100-year lead or lag) over ~5.5 kyear, a phenomenon also reflected by a significant (>99% conf. lev.) band in the power spectra of the composite difference (Δ) of the two size records. During long-range transport, mineral dust originating from the Southern Hemisphere continents is graded to a variable extent depending on the altitude and duration of atmospheric transport. Relatively coarse dust is associated with air mass penetration from the middle-lower troposphere and conversely relatively fine dust with upper troposphere air masses or the influence of subsidence over the Antarctic plateau, a hypothesis already proposed for the changes that occurred during the Last Glacial Maximum to Holocene transition (Delmonte et al. 2004b). Moreover, we assume that the overall fluctuation of air mass advection over Antarctica depends on the meridional pressure gradient with respect to low latitudes, i.e. the Antarctic Oscillation (AAO). We therefore suggest a regional variability in atmospheric circulation over East Antarctica. The 150-500 year power spectrum of the composite (Σ) parameter represents the long term variability of the AAO, imprinted by secular internal oscillations probably related to the southern ocean-climatic ... |
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) Department of Environmental Sciences Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB) Department of Geological Sciences Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Department of Chemistry Università degli Studi di Firenze = University of Florence = Université de Florence (UniFI) European Project for Ice Coring in Antarctica (EPICA) European Commission under the Environmental and Climate Programme (1994-1998) : contract ENV4-CT95-0074 |
format |
Article in Journal/Newspaper |
author |
Delmonte, B. Petit, Jean-Robert Krinner, Gerhard Maggi, W. Jouzel, Jean Udisti, Roberto |
author_facet |
Delmonte, B. Petit, Jean-Robert Krinner, Gerhard Maggi, W. Jouzel, Jean Udisti, Roberto |
author_sort |
Delmonte, B. |
title |
Ice core evidence for secular variability and 200-year dipolar oscillations in atmospheric circulation over East Antarctica during the Holocene |
title_short |
Ice core evidence for secular variability and 200-year dipolar oscillations in atmospheric circulation over East Antarctica during the Holocene |
title_full |
Ice core evidence for secular variability and 200-year dipolar oscillations in atmospheric circulation over East Antarctica during the Holocene |
title_fullStr |
Ice core evidence for secular variability and 200-year dipolar oscillations in atmospheric circulation over East Antarctica during the Holocene |
title_full_unstemmed |
Ice core evidence for secular variability and 200-year dipolar oscillations in atmospheric circulation over East Antarctica during the Holocene |
title_sort |
ice core evidence for secular variability and 200-year dipolar oscillations in atmospheric circulation over east antarctica during the holocene |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://insu.hal.science/insu-00374150 https://doi.org/10.1007/s00382-005-0012-9 |
geographic |
Antarctic Southern Ocean The Antarctic East Antarctica |
geographic_facet |
Antarctic Southern Ocean The Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core Southern Ocean |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://insu.hal.science/insu-00374150 Climate Dynamics, 2005, 24 (6), pp.641 à 654. ⟨10.1007/s00382-005-0012-9⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-005-0012-9 insu-00374150 https://insu.hal.science/insu-00374150 doi:10.1007/s00382-005-0012-9 |
op_doi |
https://doi.org/10.1007/s00382-005-0012-9 |
container_title |
Climate Dynamics |
container_volume |
24 |
container_issue |
6 |
container_start_page |
641 |
op_container_end_page |
654 |
_version_ |
1798849581496139776 |
spelling |
ftuniversailles:oai:HAL:insu-00374150v1 2024-05-12T07:54:28+00:00 Ice core evidence for secular variability and 200-year dipolar oscillations in atmospheric circulation over East Antarctica during the Holocene Delmonte, B. Petit, Jean-Robert Krinner, Gerhard Maggi, W. Jouzel, Jean Udisti, Roberto 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) Department of Environmental Sciences Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB) Department of Geological Sciences Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Department of Chemistry Università degli Studi di Firenze = University of Florence = Université de Florence (UniFI) European Project for Ice Coring in Antarctica (EPICA) European Commission under the Environmental and Climate Programme (1994-1998) : contract ENV4-CT95-0074 2005 https://insu.hal.science/insu-00374150 https://doi.org/10.1007/s00382-005-0012-9 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-005-0012-9 insu-00374150 https://insu.hal.science/insu-00374150 doi:10.1007/s00382-005-0012-9 ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://insu.hal.science/insu-00374150 Climate Dynamics, 2005, 24 (6), pp.641 à 654. ⟨10.1007/s00382-005-0012-9⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2005 ftuniversailles https://doi.org/10.1007/s00382-005-0012-9 2024-04-18T00:23:49Z International audience Two Holocene ice core records from East Antarctica (Vostok and EPICA-Dome C) were analysed for dust concentration and size distribution at a temporal resolution of 1 sample per ~50 years. A series of volcanic markers randomly distributed over the common part of the ice cores (from 9.8 to 3.5 kyear BP) ensures accurate relative dating (±33 years). Dust-size records from the two sites display oscillations structured in cycles with sub-millennial and secular scale frequencies that are apparently asynchronous. The power spectra of the composite sum (Σ) of the two dust-size records display spectral energy mostly for 150- to 500-year periodicities. On the other hand, the 200-year band is common to both records and the 200 year components of the two sites are out-of-phase (100-year lead or lag) over ~5.5 kyear, a phenomenon also reflected by a significant (>99% conf. lev.) band in the power spectra of the composite difference (Δ) of the two size records. During long-range transport, mineral dust originating from the Southern Hemisphere continents is graded to a variable extent depending on the altitude and duration of atmospheric transport. Relatively coarse dust is associated with air mass penetration from the middle-lower troposphere and conversely relatively fine dust with upper troposphere air masses or the influence of subsidence over the Antarctic plateau, a hypothesis already proposed for the changes that occurred during the Last Glacial Maximum to Holocene transition (Delmonte et al. 2004b). Moreover, we assume that the overall fluctuation of air mass advection over Antarctica depends on the meridional pressure gradient with respect to low latitudes, i.e. the Antarctic Oscillation (AAO). We therefore suggest a regional variability in atmospheric circulation over East Antarctica. The 150-500 year power spectrum of the composite (Σ) parameter represents the long term variability of the AAO, imprinted by secular internal oscillations probably related to the southern ocean-climatic ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica EPICA ice core Southern Ocean Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Antarctic Southern Ocean The Antarctic East Antarctica Climate Dynamics 24 6 641 654 |