Spatial and temporal variability of snow accumulation in East Antarctica from traverse data
International audience Recent snow accumulation rate is a key quantity for ice-core and mass-balance studies. Several accumulation measurement methods (stake farm, fin core, snow-radar profiling, surface morphology, remote sensing) were used, compared and integrated at eight sites along a transect f...
Published in: | Journal of Glaciology |
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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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Subjects: | |
Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00374309 https://hal-insu.archives-ouvertes.fr/insu-00374309/document https://hal-insu.archives-ouvertes.fr/insu-00374309/file/spatial-and-temporal-variability-of-snow-accumulation-in-east-antarctica-from-traverse-data.pdf https://doi.org/10.3189/172756505781829502 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
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 Frezzotti, Massimo Pourchet, Michel Flora, Onelio Gandolfi, Stefano Gay, Michel Urbini, Stefano Vincent, Christian Becagli, Silvia Gragnani, Roberto Proposito, Marco Severi, Mirko Traversi, Rita Udisti, Roberto Fily, Michel Spatial and temporal variability of snow accumulation in East Antarctica from traverse data |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Recent snow accumulation rate is a key quantity for ice-core and mass-balance studies. Several accumulation measurement methods (stake farm, fin core, snow-radar profiling, surface morphology, remote sensing) were used, compared and integrated at eight sites along a transect from Terra Nova Bay to Dome C, East Antarctica, to provide information about the spatial and temporal variability of snow accumulation. Thirty-nine cores were dated by identifying tritium/b marker levels (1965-66) and non-sea-salt (nss) SO4 2- spikes of the Tambora (Indonesia) volcanic event (1816) in order to provide information on temporal variability. Cores were linked by snow radar and global positioning system surveys to provide detailed information on spatial variability in snow accumulation. Stake-farm and ice-core accumulation rates are observed to differ significantly, but isochrones (snow radar) correlate well with ice-core derived accumulation. The accumulation/ablation pattern from stake measurements suggests that the annual local noise (metre scale) in snow accumulation can approach 2 years of ablation and more than four times the average annual accumulation, with no accumulation or ablation for a 5 year period in up to 40% of cases. The spatial variability of snow accumulation at the kilometre scale is one order of magnitude higher than temporal variability at the multi-decadal/secular scale. Stake measurements and firn cores at Dome C confirm an approximate 30% increase in accumulation over the last two centuries, with respect to the average over the last 5000 years. |
author2 |
Italian National agency for new technologies, Energy and sustainable economic development Frascati (ENEA) 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) Dipartimento di Scienze Geologiche Trieste Università degli studi di Trieste = University of Trieste Dipartimento di Ingegneria delle Strutture, dei Trasporti, delle Acque, del Rilevamento, del Territorio (DISTART) Alma Mater Studiorum Università di Bologna Bologna (UNIBO) Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Roma (INGV) Istituto Nazionale di Geofisica e Vulcanologia Department of Chemistry Università degli Studi di Firenze = University of Florence (UniFI) European Project for Ice Coring in Antarctica (EPICA) |
format |
Article in Journal/Newspaper |
author |
Frezzotti, Massimo Pourchet, Michel Flora, Onelio Gandolfi, Stefano Gay, Michel Urbini, Stefano Vincent, Christian Becagli, Silvia Gragnani, Roberto Proposito, Marco Severi, Mirko Traversi, Rita Udisti, Roberto Fily, Michel |
author_facet |
Frezzotti, Massimo Pourchet, Michel Flora, Onelio Gandolfi, Stefano Gay, Michel Urbini, Stefano Vincent, Christian Becagli, Silvia Gragnani, Roberto Proposito, Marco Severi, Mirko Traversi, Rita Udisti, Roberto Fily, Michel |
author_sort |
Frezzotti, Massimo |
title |
Spatial and temporal variability of snow accumulation in East Antarctica from traverse data |
title_short |
Spatial and temporal variability of snow accumulation in East Antarctica from traverse data |
title_full |
Spatial and temporal variability of snow accumulation in East Antarctica from traverse data |
title_fullStr |
Spatial and temporal variability of snow accumulation in East Antarctica from traverse data |
title_full_unstemmed |
Spatial and temporal variability of snow accumulation in East Antarctica from traverse data |
title_sort |
spatial and temporal variability of snow accumulation in east antarctica from traverse data |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00374309 https://hal-insu.archives-ouvertes.fr/insu-00374309/document https://hal-insu.archives-ouvertes.fr/insu-00374309/file/spatial-and-temporal-variability-of-snow-accumulation-in-east-antarctica-from-traverse-data.pdf https://doi.org/10.3189/172756505781829502 |
geographic |
East Antarctica Terra Nova Bay |
geographic_facet |
East Antarctica Terra Nova Bay |
genre |
Antarc* Antarctica East Antarctica ice core Journal of Glaciology |
genre_facet |
Antarc* Antarctica East Antarctica ice core Journal of Glaciology |
op_source |
ISSN: 0022-1430 EISSN: 1727-5652 Journal of Glaciology https://hal-insu.archives-ouvertes.fr/insu-00374309 Journal of Glaciology, 2005, 51 (172), pp.113 à 124. ⟨10.3189/172756505781829502⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/172756505781829502 insu-00374309 https://hal-insu.archives-ouvertes.fr/insu-00374309 https://hal-insu.archives-ouvertes.fr/insu-00374309/document https://hal-insu.archives-ouvertes.fr/insu-00374309/file/spatial-and-temporal-variability-of-snow-accumulation-in-east-antarctica-from-traverse-data.pdf doi:10.3189/172756505781829502 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3189/172756505781829502 |
container_title |
Journal of Glaciology |
container_volume |
51 |
container_issue |
172 |
container_start_page |
113 |
op_container_end_page |
124 |
_version_ |
1766068514628567040 |
spelling |
ftunivnantes:oai:HAL:insu-00374309v1 2023-05-15T13:35:39+02:00 Spatial and temporal variability of snow accumulation in East Antarctica from traverse data Frezzotti, Massimo Pourchet, Michel Flora, Onelio Gandolfi, Stefano Gay, Michel Urbini, Stefano Vincent, Christian Becagli, Silvia Gragnani, Roberto Proposito, Marco Severi, Mirko Traversi, Rita Udisti, Roberto Fily, Michel Italian National agency for new technologies, Energy and sustainable economic development Frascati (ENEA) 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) Dipartimento di Scienze Geologiche Trieste Università degli studi di Trieste = University of Trieste Dipartimento di Ingegneria delle Strutture, dei Trasporti, delle Acque, del Rilevamento, del Territorio (DISTART) Alma Mater Studiorum Università di Bologna Bologna (UNIBO) Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Roma (INGV) Istituto Nazionale di Geofisica e Vulcanologia Department of Chemistry Università degli Studi di Firenze = University of Florence (UniFI) European Project for Ice Coring in Antarctica (EPICA) 2005 https://hal-insu.archives-ouvertes.fr/insu-00374309 https://hal-insu.archives-ouvertes.fr/insu-00374309/document https://hal-insu.archives-ouvertes.fr/insu-00374309/file/spatial-and-temporal-variability-of-snow-accumulation-in-east-antarctica-from-traverse-data.pdf https://doi.org/10.3189/172756505781829502 en eng HAL CCSD International Glaciological Society info:eu-repo/semantics/altIdentifier/doi/10.3189/172756505781829502 insu-00374309 https://hal-insu.archives-ouvertes.fr/insu-00374309 https://hal-insu.archives-ouvertes.fr/insu-00374309/document https://hal-insu.archives-ouvertes.fr/insu-00374309/file/spatial-and-temporal-variability-of-snow-accumulation-in-east-antarctica-from-traverse-data.pdf doi:10.3189/172756505781829502 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0022-1430 EISSN: 1727-5652 Journal of Glaciology https://hal-insu.archives-ouvertes.fr/insu-00374309 Journal of Glaciology, 2005, 51 (172), pp.113 à 124. ⟨10.3189/172756505781829502⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2005 ftunivnantes https://doi.org/10.3189/172756505781829502 2023-03-01T02:36:20Z International audience Recent snow accumulation rate is a key quantity for ice-core and mass-balance studies. Several accumulation measurement methods (stake farm, fin core, snow-radar profiling, surface morphology, remote sensing) were used, compared and integrated at eight sites along a transect from Terra Nova Bay to Dome C, East Antarctica, to provide information about the spatial and temporal variability of snow accumulation. Thirty-nine cores were dated by identifying tritium/b marker levels (1965-66) and non-sea-salt (nss) SO4 2- spikes of the Tambora (Indonesia) volcanic event (1816) in order to provide information on temporal variability. Cores were linked by snow radar and global positioning system surveys to provide detailed information on spatial variability in snow accumulation. Stake-farm and ice-core accumulation rates are observed to differ significantly, but isochrones (snow radar) correlate well with ice-core derived accumulation. The accumulation/ablation pattern from stake measurements suggests that the annual local noise (metre scale) in snow accumulation can approach 2 years of ablation and more than four times the average annual accumulation, with no accumulation or ablation for a 5 year period in up to 40% of cases. The spatial variability of snow accumulation at the kilometre scale is one order of magnitude higher than temporal variability at the multi-decadal/secular scale. Stake measurements and firn cores at Dome C confirm an approximate 30% increase in accumulation over the last two centuries, with respect to the average over the last 5000 years. Article in Journal/Newspaper Antarc* Antarctica East Antarctica ice core Journal of Glaciology Université de Nantes: HAL-UNIV-NANTES East Antarctica Terra Nova Bay Journal of Glaciology 51 172 113 124 |