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Title: Temporal changes in crevasses in the middle Slessor Glacier, Coats Land, East Antarctica through SAR data analysis
Other Titles: Temporal changes in crevasses in the middle Slessor Glacier, Coats Land, East Antarctica through SAR data analysis
Authors: KOIKE, Katsuaki  kyouindb  KAKEN_id
YOSHIDA, Hiroaki
OMURA, Makoto
SHIBUYA, Kazuo
DOI, Koichiro
Keywords: ERS SAR
intensity image
interferometry
glacier
topography
temperature
tensile stress
ERS SAR
intensity image
interferometry
glacier
topography
temperature
tensile stress
Issue Date: 12-Mar-2012
Publisher: Terra Scientific Publishing company
Journal title: Earth, planets and space
Volume: 64
Issue: 3
Start page: 257
End page: 267
Abstract: Mosaic processing of SAR images by ERS 1/2 AMI revealed the detailed topography within a large valley (middle Slessor Glacier) in Coats Land, East Antarctica, showing oval and feather-shaped features that correspond to precipitous cliffs and accumulated crevasses, respectively. Time-series analysis of SAR intensity images acquired on six dates within the period October 1991 to August 2000 revealed the following topographic changes over time: (1) the feather-shaped feature moved down the slope at a rate of about 100 m/year; and (2) the extent of crevasse areas increased with time, both at the northern end of the feather-shaped feature and at the northeastern tip of the oval feature, with the increasing rates being much larger in the case of the feather-shaped feature. High increase ratios were generally correlated with a rapid increase in wintertime temperature within a short period of about 2 weeks: the relationship was approximated by an exponential function. Furthermore, we interpreted that the occurrence of a fault in the subglacial topography may have led to the initiation of ice fractures and a subsequent concentration of crevasses at the end of the feather-shaped feature.
Rights: c The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences; TERRAPUB.
許諾条件により本文は2013-03-14に公開
URI: http://hdl.handle.net/2433/170730
DOI(Published Version): 10.5047/eps.2011.10.003
Appears in Collections:Journal Articles

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