Water Exchange between Deep Basins of the Bransfield Strait
The Bransfield Strait is a relatively deep and narrow channel between the South Shetland Islands and the Antarctic Peninsula contributing to the water transport between the Pacific and Atlantic sectors of the Southern Ocean. The strait can be divided into three deep separate basins, namely, the west...
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ftmdpi:oai:mdpi.com:/2073-4441/14/20/3193/ 2023-08-20T04:01:22+02:00 Water Exchange between Deep Basins of the Bransfield Strait Dmitry I. Frey Viktor A. Krechik Eugene G. Morozov Ilya D. Drozd Alexandra S. Gordey Alexander A. Latushkin Olga S. Mekhova Rinat Z. Mukhametianov Svetlana A. Murzina Sofia A. Ostroumova Vladimir I. Ponomarev Pavel A. Salyuk Daria A. Smirnova Sergey A. Shutov Oleg A. Zuev agris 2022-10-11 application/pdf https://doi.org/10.3390/w14203193 EN eng Multidisciplinary Digital Publishing Institute Oceans and Coastal Zones https://dx.doi.org/10.3390/w14203193 https://creativecommons.org/licenses/by/4.0/ Water; Volume 14; Issue 20; Pages: 3193 Bransfield Strait deep overflow CTD LADCP bottom circulation Text 2022 ftmdpi https://doi.org/10.3390/w14203193 2023-08-01T06:49:34Z The Bransfield Strait is a relatively deep and narrow channel between the South Shetland Islands and the Antarctic Peninsula contributing to the water transport between the Pacific and Atlantic sectors of the Southern Ocean. The strait can be divided into three deep separate basins, namely, the western, central, and eastern basins. The sources of deep waters in the three basins are different, leading to differences in thermohaline properties and water density between the basins. The difference in water density should in turn cause intense deep currents from one basin to another through narrow passages over the sills separating the basins. However, there are still no works dedicated to such possible overflows in the Bransfield Strait. In this study, we report our new CTD and LADCP measurements performed in 2022 over the watersheds between the basins. Quasisimultaneous observations of the main circulation patterns carried out at several sections allowed us to analyze the evolution of thermohaline and kinematic structures along the Bransfield Strait. Volume transports of waters in the strait were estimated on the basis of direct velocity observations. These new data also indicate the existence of intense and variable deep current between the central and eastern basins of the strait. The analysis of historical data shows that the mean flow is directed from the central to the eastern basin. In addition, LADCP data suggest the intensification of the flow in the narrow part of the sill between the basins, and the possible mixing of deep waters at this location. Text Antarc* Antarctic Antarctic Peninsula Bransfield Strait South Shetland Islands Southern Ocean MDPI Open Access Publishing Antarctic Southern Ocean The Antarctic Antarctic Peninsula South Shetland Islands Bransfield Strait Pacific Water 14 20 3193 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Bransfield Strait deep overflow CTD LADCP bottom circulation |
spellingShingle |
Bransfield Strait deep overflow CTD LADCP bottom circulation Dmitry I. Frey Viktor A. Krechik Eugene G. Morozov Ilya D. Drozd Alexandra S. Gordey Alexander A. Latushkin Olga S. Mekhova Rinat Z. Mukhametianov Svetlana A. Murzina Sofia A. Ostroumova Vladimir I. Ponomarev Pavel A. Salyuk Daria A. Smirnova Sergey A. Shutov Oleg A. Zuev Water Exchange between Deep Basins of the Bransfield Strait |
topic_facet |
Bransfield Strait deep overflow CTD LADCP bottom circulation |
description |
The Bransfield Strait is a relatively deep and narrow channel between the South Shetland Islands and the Antarctic Peninsula contributing to the water transport between the Pacific and Atlantic sectors of the Southern Ocean. The strait can be divided into three deep separate basins, namely, the western, central, and eastern basins. The sources of deep waters in the three basins are different, leading to differences in thermohaline properties and water density between the basins. The difference in water density should in turn cause intense deep currents from one basin to another through narrow passages over the sills separating the basins. However, there are still no works dedicated to such possible overflows in the Bransfield Strait. In this study, we report our new CTD and LADCP measurements performed in 2022 over the watersheds between the basins. Quasisimultaneous observations of the main circulation patterns carried out at several sections allowed us to analyze the evolution of thermohaline and kinematic structures along the Bransfield Strait. Volume transports of waters in the strait were estimated on the basis of direct velocity observations. These new data also indicate the existence of intense and variable deep current between the central and eastern basins of the strait. The analysis of historical data shows that the mean flow is directed from the central to the eastern basin. In addition, LADCP data suggest the intensification of the flow in the narrow part of the sill between the basins, and the possible mixing of deep waters at this location. |
format |
Text |
author |
Dmitry I. Frey Viktor A. Krechik Eugene G. Morozov Ilya D. Drozd Alexandra S. Gordey Alexander A. Latushkin Olga S. Mekhova Rinat Z. Mukhametianov Svetlana A. Murzina Sofia A. Ostroumova Vladimir I. Ponomarev Pavel A. Salyuk Daria A. Smirnova Sergey A. Shutov Oleg A. Zuev |
author_facet |
Dmitry I. Frey Viktor A. Krechik Eugene G. Morozov Ilya D. Drozd Alexandra S. Gordey Alexander A. Latushkin Olga S. Mekhova Rinat Z. Mukhametianov Svetlana A. Murzina Sofia A. Ostroumova Vladimir I. Ponomarev Pavel A. Salyuk Daria A. Smirnova Sergey A. Shutov Oleg A. Zuev |
author_sort |
Dmitry I. Frey |
title |
Water Exchange between Deep Basins of the Bransfield Strait |
title_short |
Water Exchange between Deep Basins of the Bransfield Strait |
title_full |
Water Exchange between Deep Basins of the Bransfield Strait |
title_fullStr |
Water Exchange between Deep Basins of the Bransfield Strait |
title_full_unstemmed |
Water Exchange between Deep Basins of the Bransfield Strait |
title_sort |
water exchange between deep basins of the bransfield strait |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/w14203193 |
op_coverage |
agris |
geographic |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula South Shetland Islands Bransfield Strait Pacific |
geographic_facet |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula South Shetland Islands Bransfield Strait Pacific |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait South Shetland Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait South Shetland Islands Southern Ocean |
op_source |
Water; Volume 14; Issue 20; Pages: 3193 |
op_relation |
Oceans and Coastal Zones https://dx.doi.org/10.3390/w14203193 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w14203193 |
container_title |
Water |
container_volume |
14 |
container_issue |
20 |
container_start_page |
3193 |
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1774724661916991488 |