New modeling of the Vostok ice flow line and implication for the glaciological chronology of the Vostok ice core

F. Parrenin; F. Remy; C. Ritz; M. G. Siegert; J. Jouzel

doi:10.1029/2004JD004561

New modeling of the Vostok ice flow line and implication for the glaciological chronology of the Vostok ice core

F. Parrenin, F. Remy, C. Ritz, M. G. Siegert, J. Jouzel

School of Geosciences

Research output: Contribution to journal › Article › peer-review

Abstract

We have used new spaceborne (elevation) and airborne (ice thickness) data to constrain a 2D1/2 model of snow accumulation and ice flow along the Ridge B-Vostok station ice flow line (East Antarctica). We show that new evaluations of the ice flow line geometry (from the surface elevation), ice thickness (from low-frequency radar data), and basal melting and sliding change significantly the chronology of the Vostok ice core. This new Vostok dating model reconciles orbital and glaciological timescales and is in good agreement with the Dome Fuji glaciological timescale. At the same time, the new model shows significantly older ages than the previous GT4 timescale for the last glacial part, being thus in better agreement with the GRIP and GISP2 chronologies.

Original language	English
Article number	D20102
Pages (from-to)	1-14
Number of pages	14
Journal	Journal of Geophysical Research
Volume	109
Issue number	D20
DOIs	https://doi.org/10.1029/2004JD004561
Publication status	Published - 27 Oct 2004

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Published in Journal of Geophysical Research: Atmospheres by the American Geophysical Union (2004)
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title = "New modeling of the Vostok ice flow line and implication for the glaciological chronology of the Vostok ice core",

abstract = "We have used new spaceborne (elevation) and airborne (ice thickness) data to constrain a 2D1/2 model of snow accumulation and ice flow along the Ridge B-Vostok station ice flow line (East Antarctica). We show that new evaluations of the ice flow line geometry (from the surface elevation), ice thickness (from low-frequency radar data), and basal melting and sliding change significantly the chronology of the Vostok ice core. This new Vostok dating model reconciles orbital and glaciological timescales and is in good agreement with the Dome Fuji glaciological timescale. At the same time, the new model shows significantly older ages than the previous GT4 timescale for the last glacial part, being thus in better agreement with the GRIP and GISP2 chronologies.",

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AU - Remy, F.

AU - Ritz, C.

AU - Siegert, M. G.

AU - Jouzel, J.

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AB - We have used new spaceborne (elevation) and airborne (ice thickness) data to constrain a 2D1/2 model of snow accumulation and ice flow along the Ridge B-Vostok station ice flow line (East Antarctica). We show that new evaluations of the ice flow line geometry (from the surface elevation), ice thickness (from low-frequency radar data), and basal melting and sliding change significantly the chronology of the Vostok ice core. This new Vostok dating model reconciles orbital and glaciological timescales and is in good agreement with the Dome Fuji glaciological timescale. At the same time, the new model shows significantly older ages than the previous GT4 timescale for the last glacial part, being thus in better agreement with the GRIP and GISP2 chronologies.

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JF - Journal of Geophysical Research

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New modeling of the Vostok ice flow line and implication for the glaciological chronology of the Vostok ice core

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