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Vibrations of Mertz Glacier ice tongue, East Antarctica

Citation

Lescarmontier, L and Legresy, B and Coleman, R and Perosanz, F and Mayet, C and Testut, L, Vibrations of Mertz Glacier ice tongue, East Antarctica, Journal of Glaciology, 58, (210) pp. 665-676. ISSN 0022-1430 (2012) [Refereed Article]


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Copyright Statement

Copyright 2012 International Glaciological Society

DOI: doi:10.3189/2012JoG11J089

Abstract

At the time of its calving in February 2010, Mertz Glacier, East Antarctica, was characterized by a 145km long, 35km wide floating tongue. In this paper, we use GPS data from the Collaborative Research into Antarctic Calving and Iceberg Evolution (CRAC-ICE) 2007/08 and 2009/10 field seasons to investigate the dynamics of Mertz Glacier. Twomonths of data were collected at the end of the 2007/08 field season from two kinematic GPS stations situated on each side of the main rift of the glacier tongue and from rock stations located around the ice tongue during 2008/09. Using Precise Point Positioning with integer ambiguity fixing, we observe that the two GPS stations recorded vibrations of the ice tongue with several dominant periods. We compare these results with a simple elastic model of the ice tongue and find that the natural vibration frequencies are similar to those observed. This information provides a better understanding of their possible effects on rift propagation and hence on the glacier calving processes.

Item Details

Item Type:Refereed Article
Keywords:Mertz Glacier, ice tongue, East Antarctica, elastic modulus, glacier, GPS, ice, iceberg calving, kinematics, vibration
Research Division:Earth Sciences
Research Group:Physical Geography and Environmental Geoscience
Research Field:Glaciology
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Effects of Climate Change and Variability on Antarctic and Sub-Antarctic Environments (excl. Social Impacts)
Author:Coleman, R (Professor Richard Coleman)
ID Code:80621
Year Published:2012
Web of Science® Times Cited:10
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2012-11-06
Last Modified:2013-04-29
Downloads:307 View Download Statistics

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