Austral summer circulation in the Bransfield Strait based on SADCP measurements and satellite altimetry
Three-dimensional structure of currents in the Bransfield Strait (BS) was measured in 2017 over 50 transects across the strait using a Shipborne Acoustic Current Doppler Profiler (SADCP) onboard the R/V Akademik Sergey Vavilov and Akademik Ioffe. These data were used to determine local features of t...
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2023
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Online Access: | https://doi.org/10.3389/fmars.2023.1111541 https://doaj.org/article/87f3c1c419b84d3bb2433b22e389501d |
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ftdoajarticles:oai:doaj.org/article:87f3c1c419b84d3bb2433b22e389501d 2023-05-15T14:07:49+02:00 Austral summer circulation in the Bransfield Strait based on SADCP measurements and satellite altimetry Dmitry Frey Viktor Krechik Alexandra Gordey Sergey Gladyshev Dmitry Churin Ilya Drozd Alexander Osadchiev Sergey Kashin Eugene Morozov Daria Smirnova 2023-03-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1111541 https://doaj.org/article/87f3c1c419b84d3bb2433b22e389501d EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1111541/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1111541 https://doaj.org/article/87f3c1c419b84d3bb2433b22e389501d Frontiers in Marine Science, Vol 10 (2023) Bransfield Strait Antarctic Peninsula region SADCP satellite altimetry ocean circulation Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.1111541 2023-03-26T01:36:20Z Three-dimensional structure of currents in the Bransfield Strait (BS) was measured in 2017 over 50 transects across the strait using a Shipborne Acoustic Current Doppler Profiler (SADCP) onboard the R/V Akademik Sergey Vavilov and Akademik Ioffe. These data were used to determine local features of the three-dimensional velocity field of the currents. The sections crossed all three basins of the BS and the main flows in the strait including the Bransfield Current and the southwestward flow of Weddell Sea waters along the Antarctic Peninsula. Two vessels are equipped with different SADCP systems with frequencies of 76.8 kHz and 38.4 kHz, which allows us to compare the data from different SADCPs. The observations reveal that very dense waters from the Weddell Sea propagate in deep layers over the shelf break; this flow is usually not observed at the sea surface. Vertical structure of the Bransfield Current significantly differs from the flow of the Weddell Sea waters and its velocity maximum is located in the upper ocean layer. We also used two gridded altimetry products of 0.25° and 0.1° resolution for investigations of circulation in the BS. We analyzed the efficiency of satellite altimetry in reproducing currents in conditions of a narrow strait and evaluated its accuracy using field velocity observations. We found that satellite altimetry can be used for identification of the mean ocean circulation patterns within the BS. However, daily altimetry data contain significant discrepancies with the in situ data and require direct measurements for studies of the BS circulation. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bransfield Strait Weddell Sea Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula Weddell Sea Austral Bransfield Strait Weddell Frontiers in Marine Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Bransfield Strait Antarctic Peninsula region SADCP satellite altimetry ocean circulation Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Bransfield Strait Antarctic Peninsula region SADCP satellite altimetry ocean circulation Science Q General. Including nature conservation geographical distribution QH1-199.5 Dmitry Frey Viktor Krechik Alexandra Gordey Sergey Gladyshev Dmitry Churin Ilya Drozd Alexander Osadchiev Sergey Kashin Eugene Morozov Daria Smirnova Austral summer circulation in the Bransfield Strait based on SADCP measurements and satellite altimetry |
topic_facet |
Bransfield Strait Antarctic Peninsula region SADCP satellite altimetry ocean circulation Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Three-dimensional structure of currents in the Bransfield Strait (BS) was measured in 2017 over 50 transects across the strait using a Shipborne Acoustic Current Doppler Profiler (SADCP) onboard the R/V Akademik Sergey Vavilov and Akademik Ioffe. These data were used to determine local features of the three-dimensional velocity field of the currents. The sections crossed all three basins of the BS and the main flows in the strait including the Bransfield Current and the southwestward flow of Weddell Sea waters along the Antarctic Peninsula. Two vessels are equipped with different SADCP systems with frequencies of 76.8 kHz and 38.4 kHz, which allows us to compare the data from different SADCPs. The observations reveal that very dense waters from the Weddell Sea propagate in deep layers over the shelf break; this flow is usually not observed at the sea surface. Vertical structure of the Bransfield Current significantly differs from the flow of the Weddell Sea waters and its velocity maximum is located in the upper ocean layer. We also used two gridded altimetry products of 0.25° and 0.1° resolution for investigations of circulation in the BS. We analyzed the efficiency of satellite altimetry in reproducing currents in conditions of a narrow strait and evaluated its accuracy using field velocity observations. We found that satellite altimetry can be used for identification of the mean ocean circulation patterns within the BS. However, daily altimetry data contain significant discrepancies with the in situ data and require direct measurements for studies of the BS circulation. |
format |
Article in Journal/Newspaper |
author |
Dmitry Frey Viktor Krechik Alexandra Gordey Sergey Gladyshev Dmitry Churin Ilya Drozd Alexander Osadchiev Sergey Kashin Eugene Morozov Daria Smirnova |
author_facet |
Dmitry Frey Viktor Krechik Alexandra Gordey Sergey Gladyshev Dmitry Churin Ilya Drozd Alexander Osadchiev Sergey Kashin Eugene Morozov Daria Smirnova |
author_sort |
Dmitry Frey |
title |
Austral summer circulation in the Bransfield Strait based on SADCP measurements and satellite altimetry |
title_short |
Austral summer circulation in the Bransfield Strait based on SADCP measurements and satellite altimetry |
title_full |
Austral summer circulation in the Bransfield Strait based on SADCP measurements and satellite altimetry |
title_fullStr |
Austral summer circulation in the Bransfield Strait based on SADCP measurements and satellite altimetry |
title_full_unstemmed |
Austral summer circulation in the Bransfield Strait based on SADCP measurements and satellite altimetry |
title_sort |
austral summer circulation in the bransfield strait based on sadcp measurements and satellite altimetry |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1111541 https://doaj.org/article/87f3c1c419b84d3bb2433b22e389501d |
geographic |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Austral Bransfield Strait Weddell |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Austral Bransfield Strait Weddell |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Weddell Sea |
op_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1111541/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1111541 https://doaj.org/article/87f3c1c419b84d3bb2433b22e389501d |
op_doi |
https://doi.org/10.3389/fmars.2023.1111541 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
_version_ |
1766279848062353408 |