Internal structure of the ice sheet between Kohnen station and Dome Fuji, Antarctica, revealed by airborne radio-echo sounding


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Daniel.Steinhage [ at ] awi.de

Abstract

This study aims to demonstrate that deep ice cores can be synchronized using internal horizons in the ice between the drill sites revealed by airborne radio-echo sounding (RES) over a distance of >1000 km, despite significant variations in glaciological parameters, such as accumulation rate between the sites. In 2002/03 a profile between the Kohnen station and Dome Fuji deep ice-core drill sites, Antarctica, was completed using airborne RES. The survey reveals several continuous internal horizons in the RES section over a length of 1217 km. The layers allow direct comparison of the deep ice cores drilled at the two stations. In particular, the counterpart of a visible layer observed in the Kohnen station (EDML) ice core at 1054 m depth has been identified in the Dome Fuji ice core at 575 m depth using internal RES horizons. Thus the two ice cores can be synchronized, i.e. the ice at 1560 m depth (at the bottom of the 2003 EDML drilling) is $49 ka old according to the Dome Fuji age/depth scale, using the traced internal layers presented in this study.



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ISI/Scopus peer-reviewed
Publication Status
Published
Eprint ID
44276
DOI 10.3189/2013AoG64A113

Cite as
Steinhage, D. , Kipfstuhl, S. , Nixdorf, U. and Miller, H. (2013): Internal structure of the ice sheet between Kohnen station and Dome Fuji, Antarctica, revealed by airborne radio-echo sounding , Annals of Glaciology, 54 (64), pp. 163-167 . doi: 10.3189/2013AoG64A113


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