Stratigraphic Studies of the Snow Cover in Mizuho Plateau
This paper is concerned with the stratigraphic investigations conducted by means of pits and snow cores on the snow cover of Mizuho Plateau in 1970-1971 and 1974-1975. The snow cover is basically composed of the unit layer (minimum structural units) and the layer boundaries caused by hiatus phenomen...
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Institute of Snow and Ice Studies, National Research Center for Disaster Prevention
1978
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ftnipr:oai:nipr.repo.nii.ac.jp:00000863 2023-05-15T17:10:58+02:00 Stratigraphic Studies of the Snow Cover in Mizuho Plateau O. Watanabe 1978-01 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=863 http://id.nii.ac.jp/1291/00000863/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=863&item_no=1&attribute_id=18&file_no=1 en eng Institute of Snow and Ice Studies, National Research Center for Disaster Prevention https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=863 http://id.nii.ac.jp/1291/00000863/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 7, 154-181(1978-01) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=863&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1978 ftnipr 2022-11-12T19:41:42Z This paper is concerned with the stratigraphic investigations conducted by means of pits and snow cores on the snow cover of Mizuho Plateau in 1970-1971 and 1974-1975. The snow cover is basically composed of the unit layer (minimum structural units) and the layer boundaries caused by hiatus phenomena. The natures of these two stratigraphic elements are revealed through the studies of structural and physical properties, as well as oxygen isotope ratios. In the high accumulation region lower than 1700-2000m a. s. l., the characteristics of the unit layer corresponded well to the seasonal changes of climatic conditions. In the inland region of less accumulation, the hiatus frequently occurs in the formation of the annual layer and almost all of the stratigraphic elements are strongly deformed by metamorphic processes. Determination of the annual accumulation rate was investigated by means of the stratigraphic interpretation, seasonal variation of oxygen isotope ratios and detection of the reference horizons by vertical profiles of gross β activity. The oxygen isotope method is not so effective in the estimation of the annual accumulation rate in areas other than high accumulation region. Accumulation shows a regional distribution such as 60cm snow per year in the coastal region and 15cm snow per year at 3400m a. s. l. According to the regional variation of snow stratification, the snow cover in Mizuho Plateau is divided characteristically into three regions with elevation boundaries lying in 1900-2100m and 2800-3200m a. s. l. Report Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Mizuho ENVELOPE(44.317,44.317,-70.683,-70.683) Mizuho Plateau ENVELOPE(40.000,40.000,-73.000,-73.000) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
This paper is concerned with the stratigraphic investigations conducted by means of pits and snow cores on the snow cover of Mizuho Plateau in 1970-1971 and 1974-1975. The snow cover is basically composed of the unit layer (minimum structural units) and the layer boundaries caused by hiatus phenomena. The natures of these two stratigraphic elements are revealed through the studies of structural and physical properties, as well as oxygen isotope ratios. In the high accumulation region lower than 1700-2000m a. s. l., the characteristics of the unit layer corresponded well to the seasonal changes of climatic conditions. In the inland region of less accumulation, the hiatus frequently occurs in the formation of the annual layer and almost all of the stratigraphic elements are strongly deformed by metamorphic processes. Determination of the annual accumulation rate was investigated by means of the stratigraphic interpretation, seasonal variation of oxygen isotope ratios and detection of the reference horizons by vertical profiles of gross β activity. The oxygen isotope method is not so effective in the estimation of the annual accumulation rate in areas other than high accumulation region. Accumulation shows a regional distribution such as 60cm snow per year in the coastal region and 15cm snow per year at 3400m a. s. l. According to the regional variation of snow stratification, the snow cover in Mizuho Plateau is divided characteristically into three regions with elevation boundaries lying in 1900-2100m and 2800-3200m a. s. l. |
format |
Report |
author |
O. Watanabe |
spellingShingle |
O. Watanabe Stratigraphic Studies of the Snow Cover in Mizuho Plateau |
author_facet |
O. Watanabe |
author_sort |
O. Watanabe |
title |
Stratigraphic Studies of the Snow Cover in Mizuho Plateau |
title_short |
Stratigraphic Studies of the Snow Cover in Mizuho Plateau |
title_full |
Stratigraphic Studies of the Snow Cover in Mizuho Plateau |
title_fullStr |
Stratigraphic Studies of the Snow Cover in Mizuho Plateau |
title_full_unstemmed |
Stratigraphic Studies of the Snow Cover in Mizuho Plateau |
title_sort |
stratigraphic studies of the snow cover in mizuho plateau |
publisher |
Institute of Snow and Ice Studies, National Research Center for Disaster Prevention |
publishDate |
1978 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=863 http://id.nii.ac.jp/1291/00000863/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=863&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(44.317,44.317,-70.683,-70.683) ENVELOPE(40.000,40.000,-73.000,-73.000) |
geographic |
Mizuho Mizuho Plateau |
geographic_facet |
Mizuho Mizuho Plateau |
genre |
Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=863 http://id.nii.ac.jp/1291/00000863/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 7, 154-181(1978-01) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=863&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766067717318639616 |