Stratigraphic Analysis of Firn and Ice at Mizuho Station
P(論文) Stratigraphy of the 150-m core from Mizuho Station, Antarctica, is studied with visual observation as well as with analysis of density and oxygen isotope profiles. Stratigraphic structures are well preserved to a depth of 70m. Considerably deviated values of density from the average depth-dens...
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ftnipr:oai:nipr.repo.nii.ac.jp:00000916 2024-09-09T19:04:03+00:00 Stratigraphic Analysis of Firn and Ice at Mizuho Station Watanabe, Okitsugu Kato, Kikuo Satow, Kazuhide Okuhira, Fumio 1978-12 application/pdf https://nipr.repo.nii.ac.jp/record/916/files/KJ00000011464.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 10 25 47 AA00733561 https://nipr.repo.nii.ac.jp/record/916/files/KJ00000011464.pdf 1978 ftnipr 2024-06-17T04:04:30Z P(論文) Stratigraphy of the 150-m core from Mizuho Station, Antarctica, is studied with visual observation as well as with analysis of density and oxygen isotope profiles. Stratigraphic structures are well preserved to a depth of 70m. Considerably deviated values of density from the average depth-density curve serve as one of good indicators of the texture of initially deposited snow. From stratigraphic interpretation about 10.6g/(cm)^2 is estimated as the mean annual accumulation. With this value the age of the lowermost part of the 150-m core is estimated to be some 1100 years B. P. excluding the periods of hiatus of annual layers. In the δ^<18>O profile to the depth of 60m, the smallest peak indicating the coldest climate is seen at a depth of 32m which is dated back to some 200 years B.P. Comparison of the δ^<18>O profile in the Mizuho core with that in the Camp Century core indicates that the period of hiatus of annual layers is about one-third of the real duration of the core formation and the mean annual accumulation is about two-thirds of 10.6g/(cm)^2 at Mizuho Station in the past 300 years. departmental bulletin paper Other/Unknown Material Antarc* Antarctica 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 Station ENVELOPE(44.317,44.317,-70.683,-70.683) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
P(論文) Stratigraphy of the 150-m core from Mizuho Station, Antarctica, is studied with visual observation as well as with analysis of density and oxygen isotope profiles. Stratigraphic structures are well preserved to a depth of 70m. Considerably deviated values of density from the average depth-density curve serve as one of good indicators of the texture of initially deposited snow. From stratigraphic interpretation about 10.6g/(cm)^2 is estimated as the mean annual accumulation. With this value the age of the lowermost part of the 150-m core is estimated to be some 1100 years B. P. excluding the periods of hiatus of annual layers. In the δ^<18>O profile to the depth of 60m, the smallest peak indicating the coldest climate is seen at a depth of 32m which is dated back to some 200 years B.P. Comparison of the δ^<18>O profile in the Mizuho core with that in the Camp Century core indicates that the period of hiatus of annual layers is about one-third of the real duration of the core formation and the mean annual accumulation is about two-thirds of 10.6g/(cm)^2 at Mizuho Station in the past 300 years. departmental bulletin paper |
author |
Watanabe, Okitsugu Kato, Kikuo Satow, Kazuhide Okuhira, Fumio |
spellingShingle |
Watanabe, Okitsugu Kato, Kikuo Satow, Kazuhide Okuhira, Fumio Stratigraphic Analysis of Firn and Ice at Mizuho Station |
author_facet |
Watanabe, Okitsugu Kato, Kikuo Satow, Kazuhide Okuhira, Fumio |
author_sort |
Watanabe, Okitsugu |
title |
Stratigraphic Analysis of Firn and Ice at Mizuho Station |
title_short |
Stratigraphic Analysis of Firn and Ice at Mizuho Station |
title_full |
Stratigraphic Analysis of Firn and Ice at Mizuho Station |
title_fullStr |
Stratigraphic Analysis of Firn and Ice at Mizuho Station |
title_full_unstemmed |
Stratigraphic Analysis of Firn and Ice at Mizuho Station |
title_sort |
stratigraphic analysis of firn and ice at mizuho station |
publishDate |
1978 |
url |
https://nipr.repo.nii.ac.jp/record/916/files/KJ00000011464.pdf |
long_lat |
ENVELOPE(44.317,44.317,-70.683,-70.683) ENVELOPE(44.317,44.317,-70.683,-70.683) |
geographic |
Mizuho Mizuho Station |
geographic_facet |
Mizuho Mizuho Station |
genre |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
Memoirs of National Institute of Polar Research. Special issue 10 25 47 AA00733561 https://nipr.repo.nii.ac.jp/record/916/files/KJ00000011464.pdf |
_version_ |
1809818049649311744 |