Linking the climate records from EPICA Dronning Maud Land and Dome Fuji

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General Information:

Miller, H. (2004): Linking the climate records from EPICA Dronning Maud Land and Dome Fuji , European Geosciences Union, 1. General Assembly, 25.-30. April, Nice, France. .
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The climate record from ice cores, which initially is obtained on a depth scale, must be transformed to an age scale. Here a variety of methods ranging from layer counting through wiggle matching to modelling are usually used but obviously to varying degrees of accuracy. For a comparison of climate records from different locations it becomes necessary to increase this accuracy in order to allow studies of e.g. phasing of events or local, respectively regional, changes of accumulation rates. Radar imaging of internal layering of ice sheets, which is able to depict isochrones within the ice can be used to effectively link the records from individual ice core drilling sites.Within the EPICA DML project high-resolution airborne radio echo soundings were performed between Dome Fuji and Kohnen station and a number of isochrones can be traced unambiguously over more than 1100 km defining tie points in the individual age-depth relations of both drill sites. This information is used to compare the stable isotope records from Dome Fuji, which faces the Indian Ocean and resembles very closely the Vostok ice core record, with the EPICA EDML isotope record, which provides the first long-term climate record of the Atlantic sector of Antarctica.

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