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High-centered polygons in the Sør Rondane Mountains, East Antarctica: Possible effect of ice wedge sublimation
https://doi.org/10.15094/00003170
https://doi.org/10.15094/000031703b6335b0-900e-481b-b731-7a61ca0b4326
名前 / ファイル | ライセンス | アクション |
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KJ00004346783 (2.1 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2006-10-01 | |||||
タイトル | ||||||
タイトル | High-centered polygons in the Sør Rondane Mountains, East Antarctica: Possible effect of ice wedge sublimation | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Antarctica | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | permafrost | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | patterned ground | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | ice wedge | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | sublimation | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00003170 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Matsuoka, Norikazu
× Matsuoka, Norikazu× Hirakawa, Kazuomi |
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著者所属(英) | ||||||
en | ||||||
Graduate School of Life and Environmental Sciences, University of Tsukuba | ||||||
著者所属(英) | ||||||
en | ||||||
Faculty of Environmental Earth Science, Hokkaido University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Small high-centered polygons, 3-15m in diameter, dominate moraine fields in an inland cold desert of the Sør Rondane Mountains, Antarctica. They mainly occur on moraine fields at two stages younger than 1Ma. The polygons on the younger moraine (<0.5Ma) generally have an ice wedge surrounded by ice-cemented permafrost, although the ice wedge cracking is inactive or too slow to be detectable. The polygons on the older moraine (0.5-1Ma) have either an ice wedge or ice-free wedge. The ice-free wedge underlies a subsided trough and consists entirely of loose and coarse sediments with vertically-oriented clasts, which represents an ice-wedge cast probably originating from long-term sublimation of an ice wedge. These observations suggest that flat-top polygons with ice wedges form in wet permafrost when located close to the ice sheet surface, but that the subsequent ice sheet lowering separates the polygons from the moisture source, and finally long-term ice sublimation leads to domed polygons with ice-wedge casts enclosed in dry permafrost. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA1130866X | |||||
書誌情報 |
Polar geoscience 巻 19, p. 189-201, 発行日 2006-10 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |