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Author
Title
New modeling of the Vostok ice flow line and implication for the glaciological chronology of the Vostok ice core
Type
Journal Article
Year
2004
Publication
Journal of geophysical research-atmospheres
Abbreviated Journal
J. Geophys. Res.
Volume
109
Issue
Pages
Keywords
glaciology; paleoclimatology; Antarctica; inverse theory; 1827 Hydrology: Glaciology; 3344 Meteorology and Atmospheric Dynamics: Paleoclimatology; 3260 Mathematical Geophysics: Inverse theory; 9310 Information Related to Geographic Region: Antarctica
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.
Programme
355
Campaign
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Corporate Author
Thesis
Publisher
American Geophysical Union
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0148-0227
ISBN
Medium
Area
Expedition
Conference
Notes
Approved
yes
Call Number
IPEV @ Thierry.Lemaire @
Serial
5618
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