The internal layering of Pine Island Glacier, West Antarctica, from airborne radar-sounding data

ABSTRACT. This paper presents an overview of internal layering across Pine Island Glacier, West Antarctica, as measured from airborne-radar data acquired during a survey conducted by the British Antarctic Survey and the University of Texas in the 2004/05 season. Internal layering is classified accor...

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Bibliographic Details
Main Authors: Nanna B. Karlsson, David M. Rippin, David G. Vaughan, Hugh F. J. Corr
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Antarctic
Pine Island Glacier
West Antarctica
Antarc*
Antarctica
British Antarctic Survey
Pine Island
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.9611
http://www.igsoc.org/annals/50/51/t51A047.pdf
Description
Summary:ABSTRACT. This paper presents an overview of internal layering across Pine Island Glacier, West Antarctica, as measured from airborne-radar data acquired during a survey conducted by the British Antarctic Survey and the University of Texas in the 2004/05 season. Internal layering is classified according to type (continuous/discontinuous/missing) and the results compared with InSAR velocities. Several areas exhibit disruption of internal layers that is most likely caused by large basal shear stresses. Signs of changes in flow were identified in a few inter-tributary areas, but overall the layering classification and distribution of layers indicate that only minor changes in ice-flow regime have taken place. This is supported by bed-topography data that show the main trunk of the glacier, as well as some of the tributaries, are topographically controlled and located in deep basins.

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