Glaciological studies on Nelson Island, South Shetland Islands, Antarctica
Abstract The ice cap on Nelson Island in the South Shetland Islands, West Antarctica, was studied between 1985 and 1989. The ice cap has an average thickness of 120 m. it is temperate, exists under the sub-Antarctic maritime climate and almost completely covers the island. Owing to intense percolati...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1995
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0022143000016270 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016270 |
id |
crcambridgeupr:10.1017/s0022143000016270 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0022143000016270 2024-06-23T07:46:29+00:00 Glaciological studies on Nelson Island, South Shetland Islands, Antarctica Jiawen, Ren Dahe, Qin Petit, J. R. Jouzel, J. Wenti, Wang Chen, Liu Xiaojun, Wang Songlin, Qian Xiaoxiang, Wang 1995 http://dx.doi.org/10.1017/s0022143000016270 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016270 en eng Cambridge University Press (CUP) Journal of Glaciology volume 41, issue 138, page 408-412 ISSN 0022-1430 1727-5652 journal-article 1995 crcambridgeupr https://doi.org/10.1017/s0022143000016270 2024-06-12T04:04:29Z Abstract The ice cap on Nelson Island in the South Shetland Islands, West Antarctica, was studied between 1985 and 1989. The ice cap has an average thickness of 120 m. it is temperate, exists under the sub-Antarctic maritime climate and almost completely covers the island. Owing to intense percolation of meltwater (and, to some extent, liquid precipitation), the snow-firn layer is in the soaked facies, with a firn-ice transition at a depth of 25-26 m at the summit. A force-balance model suggests that the ice is almost linearly viscous but has a high viscosity. The model further suggests that basal sliding makes a larger contribution to the ice movement than does ice deformation. From 1970 to 1988. the average accumulation rate was 120 kg m −2 a −1 at the centre, and between 1985 and 1989 the equilibrium-line elevation averaged 110m a.s.l. Analysis of chemical impurities in the surface snow suggests that the precipitation source is mainly local marine air masses and that human activity has already exerted a detectable influence on the local environment. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice cap Journal of Glaciology Nelson Island South Shetland Islands West Antarctica Cambridge University Press Antarctic West Antarctica South Shetland Islands Nelson Island ENVELOPE(-59.050,-59.050,-62.300,-62.300) Journal of Glaciology 41 138 408 412 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract The ice cap on Nelson Island in the South Shetland Islands, West Antarctica, was studied between 1985 and 1989. The ice cap has an average thickness of 120 m. it is temperate, exists under the sub-Antarctic maritime climate and almost completely covers the island. Owing to intense percolation of meltwater (and, to some extent, liquid precipitation), the snow-firn layer is in the soaked facies, with a firn-ice transition at a depth of 25-26 m at the summit. A force-balance model suggests that the ice is almost linearly viscous but has a high viscosity. The model further suggests that basal sliding makes a larger contribution to the ice movement than does ice deformation. From 1970 to 1988. the average accumulation rate was 120 kg m −2 a −1 at the centre, and between 1985 and 1989 the equilibrium-line elevation averaged 110m a.s.l. Analysis of chemical impurities in the surface snow suggests that the precipitation source is mainly local marine air masses and that human activity has already exerted a detectable influence on the local environment. |
format |
Article in Journal/Newspaper |
author |
Jiawen, Ren Dahe, Qin Petit, J. R. Jouzel, J. Wenti, Wang Chen, Liu Xiaojun, Wang Songlin, Qian Xiaoxiang, Wang |
spellingShingle |
Jiawen, Ren Dahe, Qin Petit, J. R. Jouzel, J. Wenti, Wang Chen, Liu Xiaojun, Wang Songlin, Qian Xiaoxiang, Wang Glaciological studies on Nelson Island, South Shetland Islands, Antarctica |
author_facet |
Jiawen, Ren Dahe, Qin Petit, J. R. Jouzel, J. Wenti, Wang Chen, Liu Xiaojun, Wang Songlin, Qian Xiaoxiang, Wang |
author_sort |
Jiawen, Ren |
title |
Glaciological studies on Nelson Island, South Shetland Islands, Antarctica |
title_short |
Glaciological studies on Nelson Island, South Shetland Islands, Antarctica |
title_full |
Glaciological studies on Nelson Island, South Shetland Islands, Antarctica |
title_fullStr |
Glaciological studies on Nelson Island, South Shetland Islands, Antarctica |
title_full_unstemmed |
Glaciological studies on Nelson Island, South Shetland Islands, Antarctica |
title_sort |
glaciological studies on nelson island, south shetland islands, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1017/s0022143000016270 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016270 |
long_lat |
ENVELOPE(-59.050,-59.050,-62.300,-62.300) |
geographic |
Antarctic West Antarctica South Shetland Islands Nelson Island |
geographic_facet |
Antarctic West Antarctica South Shetland Islands Nelson Island |
genre |
Antarc* Antarctic Antarctica Ice cap Journal of Glaciology Nelson Island South Shetland Islands West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice cap Journal of Glaciology Nelson Island South Shetland Islands West Antarctica |
op_source |
Journal of Glaciology volume 41, issue 138, page 408-412 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000016270 |
container_title |
Journal of Glaciology |
container_volume |
41 |
container_issue |
138 |
container_start_page |
408 |
op_container_end_page |
412 |
_version_ |
1802646294605332480 |