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Timing of Recent Accelerations of Pine Island Glacier, Antarctica
Author(s) -
Joughin Ian,
Rignot Eric,
Rosanova Christine E.,
Lucchitta Baerbel K.,
Bohlander Jennifer
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2003gl017609
Subject(s) - geology , glacier , acceleration , interferometric synthetic aperture radar , thinning , geodesy , synthetic aperture radar , magnitude (astronomy) , flux (metallurgy) , remote sensing , physical geography , climatology , geomorphology , geography , physics , materials science , classical mechanics , astronomy , forestry , metallurgy
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.