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Velocities of the Amery Ice Shelf's primary tributary glaciers, 2004-12
journal contribution
posted on 2023-05-18, 10:43 authored by Pittard, ML, Jason RobertsJason Roberts, Christopher WatsonChristopher Watson, Benjamin Galton-FenziBenjamin Galton-Fenzi, Roland WarnerRoland Warner, Richard ColemanRichard ColemanMonitoring the rate of ice flow into ice shelves is vital to understanding how, where and when mass changes occur in Antarctica. Previous observations of ice surface velocity indicate that the Amery Ice Shelf and tributary glaciers have been relatively stable over the period 1968 to 1999. This study measured the displacement of features on the ice surface over a sequence of Landsat 7 images separated by approximately one year and spanning 2004 to 2012 using the surface feature tracking software IMCORR. The focus is on the region surrounding the southern grounding zone of the Amery Ice Shelf and its primary tributary glaciers: the Fisher, Lambert and Mellor glaciers. No significant changes in surface velocity were observed over this period. Accordingly, the velocity fields from each image pair between 2004 and 2012 were used to synthesize an average velocity dataset of the Amery Ice Shelf region and to compare it to previously published velocity datasets and in situ global positioning system velocity observations. No significant change in ice surface velocities was found between 2004 and 2012 in the Amery Ice Shelf region, which suggests that it continues to remain stable.
Funding
Department of Environment and Energy (Cwth)
History
Publication title
Antarctic ScienceVolume
27Issue
5Pagination
511-523ISSN
0954-1020Department/School
Institute for Marine and Antarctic StudiesPublisher
Cambridge Univ PressPlace of publication
40 West 20Th St, New York, USA, Ny, 10011-4211Rights statement
© Antarctic Science Ltd 2015Repository Status
- Restricted