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Snow structure and depth hoar formation in Mizuho Plateau, Antarctica
https://nipr.repo.nii.ac.jp/records/1679
https://nipr.repo.nii.ac.jp/records/16796efd0046-ad04-42f4-8adc-83e39b7fe502
名前 / ファイル | ライセンス | アクション |
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KJ00000012311 (1.5 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||||||
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公開日 | 1984-12-01 | |||||||||
タイトル | ||||||||||
言語 | en | |||||||||
タイトル | Snow structure and depth hoar formation in Mizuho Plateau, Antarctica | |||||||||
言語 | ||||||||||
言語 | eng | |||||||||
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 | |||||||||
ページ属性 | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | P(論文) | |||||||||
著者名(英) |
Nishimura, Hiroshi
× Nishimura, Hiroshi
× Maeno, Norikazu
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著者所属(英) | ||||||||||
en | ||||||||||
The Institute of Low Temperature Science, Hokkaido University | ||||||||||
抄録(英) | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | The development of depth hoar was investigated for four 30-m snow cores in Mizuho Plateau, Antarctica, with measurements of specific area of internal free surfaces and air permeability. Both the specific area and air permeability increased with increasing porosity for the four cores. But the specific area at a given porosity was smaller for the core in a region having a smaller accumulation rate. The air permeability at a given porosity was larger in a region having a smaller accumulation rate. Degrees of orientation were extremely large in a region having a smaller accumulation rate, showing the development of vertical structure. It was concluded that the development of depth hoar was larger at a smaller accumulation rate. The dominant factor of the development of depth hoar was discussed with reference to the variations of snow temperature at the four stations of core sampling. The development of depth hoar is essentially determined not only by the temperature gradient in snow but also by the staying period near the surface where the temperature gradient is largest. Thus the accumulation rate is an important factor in determining the characteristic structure of snow in polar regions. A physical quantity, cumulative thermogradient, is introduced to describe the degree of depth hoar development at a given site. | |||||||||
雑誌書誌ID | ||||||||||
収録物識別子タイプ | NCID | |||||||||
収録物識別子 | AA00733561 | |||||||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 34, p. 137-146, 発行日 1984-12 |