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1-d-ice Flow Modelling at Epica Dome C and Dome Fuji, East Antarctica : Volume 3, Issue 2 (01/06/2007)

By Parrenin, F.

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Book Id: WPLBN0004006038
Format Type: PDF Article :
File Size: Pages 17
Reproduction Date: 2015

Title: 1-d-ice Flow Modelling at Epica Dome C and Dome Fuji, East Antarctica : Volume 3, Issue 2 (01/06/2007)  
Author: Parrenin, F.
Volume: Vol. 3, Issue 2
Language: English
Subject: Science, Climate, Past
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2007
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Dreyfus, G., Uemura, R., Gillet, F., Durand, G., Yoshida, N., Watanabe, O.,...Kawamura, K. (2007). 1-d-ice Flow Modelling at Epica Dome C and Dome Fuji, East Antarctica : Volume 3, Issue 2 (01/06/2007). Retrieved from http://www.ebooklibrary.org/


Description
Description: Laboratoire de Glaciologie et Géophysique de l'Environnement, CNRS and Joseph Fourier University, Grenoble, France. One-dimensional (1-D) ice flow models are used to construct the age scales at the Dome C and Dome Fuji drilling sites (East Antarctica). The poorly constrained glaciological parameters at each site are recovered by fitting independent age markers identified within each core. We reconstruct past accumulation rates, that are larger than those modelled using the classical vapour saturation pressure relationship during glacial periods by up to a factor 1.5. During the Early Holocene, changes in reconstructed accumulation are not linearly related to changes in ice isotopic composition. A simple model of past elevation changes is developed and shows an amplitude variation of 110–120 m at both sites. We suggest that there is basal melting at Dome C (0.56±0.19 mm/yr). The reconstructed velocity profile is highly non-linear at both sites, which suggests complex ice flow effects. This induces a non-linear thinning function in both drilling sites, which is also characterized by bumps corresponding to variations in ice thickness with time.

Summary
1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica

Excerpt
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