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Preliminary evidence indicating Dome A (Antarctica) satisfying preconditions for drilling the oldest ice core

Citation

Xiao, C and Li, Y and Hou, S and Allison, I and Bian, L and Ren, J, Preliminary evidence indicating Dome A (Antarctica) satisfying preconditions for drilling the oldest ice core, Chinese Science Bulletin, 53, (1) pp. 102-106. ISSN 1001-6538 (2007) [Refereed Article]

Copyright Statement

Copyright 2008 Science in China Press

DOI: doi:10.1007/s11434-007-0520-6

Abstract

Lowest temperature and snow accumulation rate are preconditions for retrieving the oldest ice core from the polar ice sheets. The 10-m depth firn temperature at Dome A, the summit of the Antarctic Ice Sheet, recorded by an automatic weather station (AWS) was −58.3C in 2005 and −58.2C in 2006, respectively. The 10-m firn temperature is an approximation of the annual mean air temperature (AMAT), and this is the lowest AMAT that has been recorded on the surface of the Earth. The stable isotopic ratios (δ 18O and δD) of surface snow at Dome A are also lower than at other ice sheet domes along the East Antarctic Ice Divide such as Dome C, Dome F, Dome B and Vostok. These facts indicate that Dome A is the "pole of cold" on the Earth. The total amount of snow accumulation rate in 2005 and 2006 was only 0.16 cm, equaling 0.016 m water equivalent per year, the lowest precipitation ever recorded from Antarctica. Preliminary evidences indicate that Dome A is a candidate site for recovering the oldest ice core.

Item Details

Item Type:Refereed Article
Keywords:Dome A, oldest Antarctic ice, ice sheet summit, ice cores
Research Division:Earth Sciences
Research Group:Physical Geography and Environmental Geoscience
Research Field:Glaciology
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Climate and Climate Change not elsewhere classified
Author:Allison, I (Dr Ian Allison)
ID Code:100646
Year Published:2007
Web of Science® Times Cited:26
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2015-05-22
Last Modified:2017-01-05
Downloads:0

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