Uplift of the Antarctic Continent in Elastic Deformation
The uplift of the shorelines in snow-free areas of the Antarctic Continent is estimated to be 20-30m and the retreat of the ice sheet to be 10-100km. This paper tries a theoretical interpretation of this uplift in terms of static deformation of an elastic semi-infinite medium or multi-layered medium...
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National Institute of Polar Research
1979
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ftnipr:oai:nipr.repo.nii.ac.jp:00001021 2023-05-15T13:47:58+02:00 Uplift of the Antarctic Continent in Elastic Deformation Katsutada Kaminuma Ryosuke Sato Yasunori Suzuki Mitsuhiro Matsu'ura 1979-10 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1021 http://id.nii.ac.jp/1291/00001021/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1021&item_no=1&attribute_id=18&file_no=1 en eng National Institute of Polar Research Geophysical Institute, Faculty of Science, University of Tokyo https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1021 http://id.nii.ac.jp/1291/00001021/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 14, 70-82(1979-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1021&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1979 ftnipr 2022-11-12T19:41:54Z The uplift of the shorelines in snow-free areas of the Antarctic Continent is estimated to be 20-30m and the retreat of the ice sheet to be 10-100km. This paper tries a theoretical interpretation of this uplift in terms of static deformation of an elastic semi-infinite medium or multi-layered medium due to the diminution of the load on the surface. As the forms of load function, which can be regarded as almost the same as the form of the ice sheet, two types of functions are considered as follows : Case I where constant pressure acts on the surface within a circular area, and Case II where pressure varies with the radius of a circular. As the crust and mantle structures, three models (Semi-infinite A, Semi-infinite B, and CANSD) are considered. The uplift is calculated by the difference in vertical displacements between the initial and the final states of the ice sheet. The initial thickness and the radius of ice sheet are denoted by H and a, and the decreases in thickness and radius are denoted by ⊿H and ⊿a, respectively. The observed uplift can be explained by the following either set of H and ⊿H with fixed a (=1700km) and ⊿a (=50km) for the Semi-infinite B and the CANSD models; for Case I, H=2.0km and ⊿H=0-0.1km, and for Case II, H=4.0km and ⊿H=0-0.1km. Reasonable values of H and ⊿H are not obtained for the Semi-infinite A model for both Cases I and II. Report Antarc* Antarctic Ice Sheet Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Antarctic The Antarctic |
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National Institute of Polar Research Repository, Japan |
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English |
description |
The uplift of the shorelines in snow-free areas of the Antarctic Continent is estimated to be 20-30m and the retreat of the ice sheet to be 10-100km. This paper tries a theoretical interpretation of this uplift in terms of static deformation of an elastic semi-infinite medium or multi-layered medium due to the diminution of the load on the surface. As the forms of load function, which can be regarded as almost the same as the form of the ice sheet, two types of functions are considered as follows : Case I where constant pressure acts on the surface within a circular area, and Case II where pressure varies with the radius of a circular. As the crust and mantle structures, three models (Semi-infinite A, Semi-infinite B, and CANSD) are considered. The uplift is calculated by the difference in vertical displacements between the initial and the final states of the ice sheet. The initial thickness and the radius of ice sheet are denoted by H and a, and the decreases in thickness and radius are denoted by ⊿H and ⊿a, respectively. The observed uplift can be explained by the following either set of H and ⊿H with fixed a (=1700km) and ⊿a (=50km) for the Semi-infinite B and the CANSD models; for Case I, H=2.0km and ⊿H=0-0.1km, and for Case II, H=4.0km and ⊿H=0-0.1km. Reasonable values of H and ⊿H are not obtained for the Semi-infinite A model for both Cases I and II. |
format |
Report |
author |
Katsutada Kaminuma Ryosuke Sato Yasunori Suzuki Mitsuhiro Matsu'ura |
spellingShingle |
Katsutada Kaminuma Ryosuke Sato Yasunori Suzuki Mitsuhiro Matsu'ura Uplift of the Antarctic Continent in Elastic Deformation |
author_facet |
Katsutada Kaminuma Ryosuke Sato Yasunori Suzuki Mitsuhiro Matsu'ura |
author_sort |
Katsutada Kaminuma |
title |
Uplift of the Antarctic Continent in Elastic Deformation |
title_short |
Uplift of the Antarctic Continent in Elastic Deformation |
title_full |
Uplift of the Antarctic Continent in Elastic Deformation |
title_fullStr |
Uplift of the Antarctic Continent in Elastic Deformation |
title_full_unstemmed |
Uplift of the Antarctic Continent in Elastic Deformation |
title_sort |
uplift of the antarctic continent in elastic deformation |
publisher |
National Institute of Polar Research |
publishDate |
1979 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1021 http://id.nii.ac.jp/1291/00001021/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1021&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctic Ice Sheet Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1021 http://id.nii.ac.jp/1291/00001021/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 14, 70-82(1979-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1021&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248229658165248 |