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10.5047eps.2011.10.003.pdf | 8.84 MB | Adobe PDF | 見る/開く |
タイトル: | Temporal changes in crevasses in the middle Slessor Glacier, Coats Land, East Antarctica through SAR data analysis |
著者: | KOIKE, Katsuaki https://orcid.org/0000-0003-2195-1369 (unconfirmed) YOSHIDA, Hiroaki OMURA, Makoto SHIBUYA, Kazuo DOI, Koichiro |
キーワード: | ERS SAR intensity image interferometry glacier topography temperature tensile stress ERS SAR intensity image interferometry glacier topography temperature tensile stress |
発行日: | 12-Mar-2012 |
出版者: | Terra Scientific Publishing company |
誌名: | Earth, planets and space |
巻: | 64 |
号: | 3 |
開始ページ: | 257 |
終了ページ: | 267 |
抄録: | 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. |
著作権等: | 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(出版社版): | 10.5047/eps.2011.10.003 |
出現コレクション: | 学術雑誌掲載論文等 |
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