2024-03-19T04:26:10Z
https://kitami-it.repo.nii.ac.jp/oai
oai:kitami-it.repo.nii.ac.jp:00008059
2022-12-13T02:21:27Z
1:86
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
open access
c 2008 International Glaciological Society
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.
International Glaciological Society
2008
eng
journal article
VoR
https://kitami-it.repo.nii.ac.jp/records/8059
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
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2016-11-22