Timing of recent accelerations of Pine Island Glacier, Antarctica

We have used Interferometric Synthetic Aperture Radar (InSAR) data and sequential Landsat imagery to identify and temporally constrain two acceleration events on Pine Island Glacier (PIG). These two events are separated by a period of at least seven years (1987 - 1994). The change in discharge betwe...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Joughin, I, Rignot, E, Rosanova, CE, Lucchitta, BK, Bohlander, J
Format: Article in Journal/Newspaper
Language:English
Published: eScholarship, University of California 2003
Subjects:
Pine Island Glacier
Antarc*
Antarctica
Pine Island
Online Access:http://www.escholarship.org/uc/item/00m2p7sb
Description
Summary:We have used Interferometric Synthetic Aperture Radar (InSAR) data and sequential Landsat imagery to identify and temporally constrain two acceleration events on Pine Island Glacier (PIG). These two events are separated by a period of at least seven years (1987 - 1994). The change in discharge between two flux gates indicates that the majority of the increase in discharge associated with the second acceleration originates well inland (>80 km) from the grounding line. An analysis indicates that changes in driving stress consistent with observed thinning rates are sufficient in magnitude to explain much of the acceleration.

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