Authors: Oerter, Hans; Graf, Wolfgang; Meyer, Hanno; Wilhelms, Frank

Source: Annals of Glaciology, Volume 39, Number 1, June 2004 , pp. 307-312(6)

Publisher: International Glaciological Society

Abstract:

The European Project for Ice Coring in Antarctica (EPICA) focuses on the drilling of two deep ice cores, the first at Dome C and the second at Kohnen station (75°00′ S, 0°04′ E) in Dronning Maud Land (DML). This paper deals with stable-isotope records from ice cores drilled in DML. In the first season, the deep EPICA DML core reached a depth of 450 m, recovering ice approximately 7000 years old. Generally, the δ¹⁸O record indicates a stable Holocene climate and shows low variability. However, during the last 4000 years (based on a preliminary time-scale) the δ¹⁸O values decrease continuously by about 0.6‰, and the deuterium excess values increase by about 0.5‰. The correlation between δ¹⁸O and the deuterium excess d is investigated for a 50 m long core section and the near-surface snow. High-pass filtered profiles are positively correlated, whereas the correlation between low-pass filtered profiles is negative. A post-depositional effect due to diffusion processes can be seen in a sub-annually resolved profile from snow-pit samples. Changes in the seasonality of the evolution of the snow cover and the consequences for stable-isotope content are demonstrated with data from ice core B31.

Document Type: Research article

DOI: http://dx.doi.org/10.3189/172756404781814032

Publication date: 2004-06-01

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• The Annals of Glaciology is a peer-reviewed, thematic journal published 2 to 4 times a year by the International Glaciological Society (IGS). Publication frequency is determined and volume/issue numbers assigned by the IGS Council on a year-to-year basis and with a lead time of 3 to 4 years. The Annals of Glaciology is included in the ISI Science Citation Index from volume 50, number 50 onwards.

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