Surface characteristics at Dome A, Antarctica: first measurements and a guide to future ice-coring sites
An assessment of the glaciological and meteorological characteristics of Dome A, the summit of the East Antarctic ice sheet, is made based on field investigations during the austral summer of 2004/05. Knowledge of these characteristics is critical for future international studies such as deep ice-co...
Published in: | Annals of Glaciology |
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International Glaciological Society
2008
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ftkitamiit:oai:kitami-it.repo.nii.ac.jp:00008059 2023-05-15T13:29:22+02:00 Surface characteristics at Dome A, Antarctica: first measurements and a guide to future ice-coring sites Cunde, Xiao Yuansheng, Li Allison, Ian Shugui, Hou Dreyfus, Gabrielle Barnola, Jean-Marc Jiawen, Ren Lingen, Bian Shenkai, Zhang Kameda, Takao 2008 application/pdf https://kitami-it.repo.nii.ac.jp/record/8059/files/2008_Surface characteristics at Dome A, Antarctica first measurements and a guide to future ice-coring sites.pdf eng eng International Glaciological Society https://doi.org/10.3189/172756408784700653 Annals of Glaciology 48 82 87 https://kitami-it.repo.nii.ac.jp/record/8059/files/2008_Surface characteristics at Dome A, Antarctica first measurements and a guide to future ice-coring sites.pdf c 2008 International Glaciological Society open access 2008 ftkitamiit https://doi.org/10.3189/172756408784700653 2023-02-26T09:13:27Z An assessment of the glaciological and meteorological characteristics of Dome A, the summit of the East Antarctic ice sheet, is made based on field investigations during the austral summer of 2004/05. Knowledge of these characteristics is critical for future international studies such as deep ice-core drilling. The assessment shows that: (1) Dome A is characterized by a very low 10 m depth firn temperature, ?58.3°C (nearly 3°C lower than at EPICA Dome C and 1°C lower than at Vostok). (2) Automatic weather station (AWS) measurements of snow surface height and reference layers in a snow pit indicate the present-day snow accumulation rate at Dome A is within the range 1?3 cm w.e.a?1. Densification models suggest a range of 1?2 cm w.e.a?1. This is lower than at other sites along the ice divide of East Antarctica (IDEA). Annual layers at Dome A are thus potentially thinner than at other sites, so that a longer record is preserved in a given ice thickness. (3) The average wind speed observed at Dome A (<4 m s?1) is lower than at other sites along IDEA. Together, these parameters, combined with radio-echo sounding data and information on the subglacial drainage distribution beneath Dome A, suggest Dome A as a candidate site for obtaining the oldest ice core. journal article Other/Unknown Material Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet Kitami Institute of Technology Repository (KIT-R) Antarctic Austral East Antarctic Ice Sheet East Antarctica Annals of Glaciology 48 82 87 |
institution |
Open Polar |
collection |
Kitami Institute of Technology Repository (KIT-R) |
op_collection_id |
ftkitamiit |
language |
English |
description |
An assessment of the glaciological and meteorological characteristics of Dome A, the summit of the East Antarctic ice sheet, is made based on field investigations during the austral summer of 2004/05. Knowledge of these characteristics is critical for future international studies such as deep ice-core drilling. The assessment shows that: (1) Dome A is characterized by a very low 10 m depth firn temperature, ?58.3°C (nearly 3°C lower than at EPICA Dome C and 1°C lower than at Vostok). (2) Automatic weather station (AWS) measurements of snow surface height and reference layers in a snow pit indicate the present-day snow accumulation rate at Dome A is within the range 1?3 cm w.e.a?1. Densification models suggest a range of 1?2 cm w.e.a?1. This is lower than at other sites along the ice divide of East Antarctica (IDEA). Annual layers at Dome A are thus potentially thinner than at other sites, so that a longer record is preserved in a given ice thickness. (3) The average wind speed observed at Dome A (<4 m s?1) is lower than at other sites along IDEA. Together, these parameters, combined with radio-echo sounding data and information on the subglacial drainage distribution beneath Dome A, suggest Dome A as a candidate site for obtaining the oldest ice core. journal article |
author |
Cunde, Xiao Yuansheng, Li Allison, Ian Shugui, Hou Dreyfus, Gabrielle Barnola, Jean-Marc Jiawen, Ren Lingen, Bian Shenkai, Zhang Kameda, Takao |
spellingShingle |
Cunde, Xiao Yuansheng, Li Allison, Ian Shugui, Hou Dreyfus, Gabrielle Barnola, Jean-Marc Jiawen, Ren Lingen, Bian Shenkai, Zhang Kameda, Takao Surface characteristics at Dome A, Antarctica: first measurements and a guide to future ice-coring sites |
author_facet |
Cunde, Xiao Yuansheng, Li Allison, Ian Shugui, Hou Dreyfus, Gabrielle Barnola, Jean-Marc Jiawen, Ren Lingen, Bian Shenkai, Zhang Kameda, Takao |
author_sort |
Cunde, Xiao |
title |
Surface characteristics at Dome A, Antarctica: first measurements and a guide to future ice-coring sites |
title_short |
Surface characteristics at Dome A, Antarctica: first measurements and a guide to future ice-coring sites |
title_full |
Surface characteristics at Dome A, Antarctica: first measurements and a guide to future ice-coring sites |
title_fullStr |
Surface characteristics at Dome A, Antarctica: first measurements and a guide to future ice-coring sites |
title_full_unstemmed |
Surface characteristics at Dome A, Antarctica: first measurements and a guide to future ice-coring sites |
title_sort |
surface characteristics at dome a, antarctica: first measurements and a guide to future ice-coring sites |
publisher |
International Glaciological Society |
publishDate |
2008 |
url |
https://kitami-it.repo.nii.ac.jp/record/8059/files/2008_Surface characteristics at Dome A, Antarctica first measurements and a guide to future ice-coring sites.pdf |
geographic |
Antarctic Austral East Antarctic Ice Sheet East Antarctica |
geographic_facet |
Antarctic Austral East Antarctic Ice Sheet East Antarctica |
genre |
Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet |
op_relation |
https://doi.org/10.3189/172756408784700653 Annals of Glaciology 48 82 87 https://kitami-it.repo.nii.ac.jp/record/8059/files/2008_Surface characteristics at Dome A, Antarctica first measurements and a guide to future ice-coring sites.pdf |
op_rights |
c 2008 International Glaciological Society open access |
op_doi |
https://doi.org/10.3189/172756408784700653 |
container_title |
Annals of Glaciology |
container_volume |
48 |
container_start_page |
82 |
op_container_end_page |
87 |
_version_ |
1766000235978424320 |