The influence of the Drygalski Ice Tongue on the local ocean
ABSTRACT The Drygalski Ice Tongue presents an ~80 km long floating obstacle to alongshore flows in the Victoria Land coastal ocean region of the Western Ross Sea. Here we use oceanographic data from near to the tongue to explore the interplay between the floating glacier and the local currents and s...
Published in: | Annals of Glaciology |
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Language: | English |
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Online Access: | https://www.openaccessrepository.it/record/41940 https://doi.org/10.1017/aog.2017.4 |
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ftopenaccessrep:oai:zenodo.org:41940 2023-05-15T18:07:33+02:00 The influence of the Drygalski Ice Tongue on the local ocean Stevens, Craig Sang Lee, Won Fusco, Giannetta Yun, Sukyoung Grant, Brett Robinson, Natalie Yeon Hwang, Chung 2017-04-17 https://www.openaccessrepository.it/record/41940 https://doi.org/10.1017/aog.2017.4 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/41940 doi:10.1017/aog.2017.4 info:eu-repo/semantics/openAccess info:eu-repo/semantics/article publication-article 2017 ftopenaccessrep https://doi.org/10.1017/aog.2017.4 2022-11-23T06:44:03Z ABSTRACT The Drygalski Ice Tongue presents an ~80 km long floating obstacle to alongshore flows in the Victoria Land coastal ocean region of the Western Ross Sea. Here we use oceanographic data from near to the tongue to explore the interplay between the floating glacier and the local currents and stratification. A vessel-based circuit of the glacier, recording ocean temperature and salinity profiles, reveals the southwest corner to be the coldest and most complex in terms of vertical structure. The southwest corner structure beneath the surface warm, salty layer sustains a block of very cold water extending to 200 m depth. In this same location there was a distinct layer at 370 m not seen anywhere else of water at ~−1.93°C. The new observations broadly, but not directly, support the presence of a coherent Victoria Land Coastal Current. The data suggest the northward moving coastal current turns against the Coriolis force and works its way anticlockwise around the glacier, but with leakage beneath the glacier through the highly 'rippled' underside, resulting in a spatially heterogeneous supply to the Terra Nova Bay Polynya region – an important location for the formation of high-salinity shelf water. Article in Journal/Newspaper Ross Sea Victoria Land Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Ross Sea Victoria Land Terra Nova Bay Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Drygalski Ice Tongue ENVELOPE(163.500,163.500,-75.400,-75.400) Annals of Glaciology 58 74 51 59 |
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Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
description |
ABSTRACT The Drygalski Ice Tongue presents an ~80 km long floating obstacle to alongshore flows in the Victoria Land coastal ocean region of the Western Ross Sea. Here we use oceanographic data from near to the tongue to explore the interplay between the floating glacier and the local currents and stratification. A vessel-based circuit of the glacier, recording ocean temperature and salinity profiles, reveals the southwest corner to be the coldest and most complex in terms of vertical structure. The southwest corner structure beneath the surface warm, salty layer sustains a block of very cold water extending to 200 m depth. In this same location there was a distinct layer at 370 m not seen anywhere else of water at ~−1.93°C. The new observations broadly, but not directly, support the presence of a coherent Victoria Land Coastal Current. The data suggest the northward moving coastal current turns against the Coriolis force and works its way anticlockwise around the glacier, but with leakage beneath the glacier through the highly 'rippled' underside, resulting in a spatially heterogeneous supply to the Terra Nova Bay Polynya region – an important location for the formation of high-salinity shelf water. |
format |
Article in Journal/Newspaper |
author |
Stevens, Craig Sang Lee, Won Fusco, Giannetta Yun, Sukyoung Grant, Brett Robinson, Natalie Yeon Hwang, Chung |
spellingShingle |
Stevens, Craig Sang Lee, Won Fusco, Giannetta Yun, Sukyoung Grant, Brett Robinson, Natalie Yeon Hwang, Chung The influence of the Drygalski Ice Tongue on the local ocean |
author_facet |
Stevens, Craig Sang Lee, Won Fusco, Giannetta Yun, Sukyoung Grant, Brett Robinson, Natalie Yeon Hwang, Chung |
author_sort |
Stevens, Craig |
title |
The influence of the Drygalski Ice Tongue on the local ocean |
title_short |
The influence of the Drygalski Ice Tongue on the local ocean |
title_full |
The influence of the Drygalski Ice Tongue on the local ocean |
title_fullStr |
The influence of the Drygalski Ice Tongue on the local ocean |
title_full_unstemmed |
The influence of the Drygalski Ice Tongue on the local ocean |
title_sort |
influence of the drygalski ice tongue on the local ocean |
publishDate |
2017 |
url |
https://www.openaccessrepository.it/record/41940 https://doi.org/10.1017/aog.2017.4 |
long_lat |
ENVELOPE(-61.000,-61.000,-64.717,-64.717) ENVELOPE(163.500,163.500,-75.400,-75.400) |
geographic |
Ross Sea Victoria Land Terra Nova Bay Drygalski Drygalski Ice Tongue |
geographic_facet |
Ross Sea Victoria Land Terra Nova Bay Drygalski Drygalski Ice Tongue |
genre |
Ross Sea Victoria Land |
genre_facet |
Ross Sea Victoria Land |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/41940 doi:10.1017/aog.2017.4 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/aog.2017.4 |
container_title |
Annals of Glaciology |
container_volume |
58 |
container_issue |
74 |
container_start_page |
51 |
op_container_end_page |
59 |
_version_ |
1766179763584499712 |