First results from stable-istope measurements on ice cores from Dronning Maud Land

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...

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Bibliographic Details
Main Authors: Oerter, Hans, Graf, Wolfgang, Meyer, Hanno, Wilhelms, Frank
Format: Dataset
Language:English
Published: PANGAEA 2004
Subjects:
B31
DML07C98_31
DML25S02_03
Dronning Maud Land
Antarctica
EDML
EDRILL
EPICA
EPICA_DML3
EPICA_DML7
EPICA-Campaigns
EPICA drill
EPICA Dronning Maud Land
DML28C01_00
European Project for Ice Coring in Antarctica
ICEDRILL
Ice drill
Kohnen Station
Neumayer Station (WMO89002)
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
SNOWPIT
Snow pit
SPP1158
SS0203
Arctic
Antarctic
Neumayer
Neumayer Station
Kohnen
Annals of Glaciology
Antarc*
DML
ice core
Sea ice
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.728145
https://doi.org/10.1594/PANGAEA.728145
Description
Summary: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 d18O record indicates a stable Holocene climate and shows low variability. However, during the last 4000 years (based on a preliminary time-scale) the d18O values decrease continuously by about 0.6%, and the deuterium excess values increase by about 0.5%. The correlation between d18O and the deuterium excess d is investigated for a 50m 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.

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