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

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 betwe...

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Bibliographic Details
Published in:Annals of Glaciology
Main Authors: Steinhage, Daniel, Kipfstuhl, Sepp, Nixdorf, Uwe, Miller, Heinrich
Format: Article in Journal/Newspaper
Language:unknown
Published: INT GLACIOL SOC 2013
Subjects:
Dome Fuji
Kohnen
Kohnen Station
Annals of Glaciology
Antarc*
Antarctica
ice core
Ice Sheet
Online Access:https://epic.awi.de/id/eprint/44276/
https://hdl.handle.net/10013/epic.50626
Description
Summary: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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