Oceanographic consequences of the Bransfield Strait (Antarctica) opening
The Bransfield Strait (Antarctica) is an important region for evaluating changes in Weddell Sea shelf waters on geological time scales because of its restricted connections to the surrounding ocean. However, the detailed oceanographic consequences of the opening of the strait remain unclear. We pres...
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Online Access: | http://hdl.handle.net/10508/16448 http://hdl.handle.net/10261/318717 https://doi.org/10.1130/G50389.1 |
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ftcsic:oai:digital.csic.es:10261/318717 2024-02-11T09:56:21+01:00 Oceanographic consequences of the Bransfield Strait (Antarctica) opening Liu, S. Hernández-Molina, F.J. Yang, C. Zhang, C. Huang, X. Yin, S. García-García, Margarita Van Rooij, D. Wang, C. Zhuo, H. Chen, H. Luo, K. Su, M. 2022-10-14 http://hdl.handle.net/10508/16448 http://hdl.handle.net/10261/318717 https://doi.org/10.1130/G50389.1 en eng Centro Oceanográfico de Cádiz AM 0091-7613 http://hdl.handle.net/10508/16448 http://hdl.handle.net/10261/318717 doi:10.1130/G50389.1 50638 open Medio Marino Centro Oceanográfico de Cádiz geology volume plate tectonics facies tomography research article 2022 ftcsic https://doi.org/10.1130/G50389.1 2024-01-16T11:45:12Z The Bransfield Strait (Antarctica) is an important region for evaluating changes in Weddell Sea shelf waters on geological time scales because of its restricted connections to the surrounding ocean. However, the detailed oceanographic consequences of the opening of the strait remain unclear. We present bottom-current-related sedimentary features in the Bransfield Strait and examine the impact of the strait’s opening on deep-water circulation. Our findings show that the ocean circulation started to resemble that of the present day after a period of volcanic activity, possibly around the Middle Pleistocene. Coeval changes in Bransfield Strait morphology and an increase in seafloor irregularities due to the formation of volcanic chains finally determined new pathways for the Bransfield deep and bottom waters, enhanced due to the new climatic scenario of 100 k.y. cycles. The fact that “modernlike” oceanic circulation occurred only during previous interglacial periods demonstrates the significant impact of 100 k.y. climate cycles on the thermohaline changes of Antarctic deep waters. Hence, establishing a modern-day circulation model would enable researchers to assess paleoproductivity and local upwelling that have profoundly influenced the marine ecosystem of the Antarctic Peninsula after the Middle Pleistocene SI Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Weddell Sea Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Bransfield Strait The Antarctic Weddell Weddell Sea Geology 50 12 1403 1408 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Medio Marino Centro Oceanográfico de Cádiz geology volume plate tectonics facies tomography |
spellingShingle |
Medio Marino Centro Oceanográfico de Cádiz geology volume plate tectonics facies tomography Liu, S. Hernández-Molina, F.J. Yang, C. Zhang, C. Huang, X. Yin, S. García-García, Margarita Van Rooij, D. Wang, C. Zhuo, H. Chen, H. Luo, K. Su, M. Oceanographic consequences of the Bransfield Strait (Antarctica) opening |
topic_facet |
Medio Marino Centro Oceanográfico de Cádiz geology volume plate tectonics facies tomography |
description |
The Bransfield Strait (Antarctica) is an important region for evaluating changes in Weddell Sea shelf waters on geological time scales because of its restricted connections to the surrounding ocean. However, the detailed oceanographic consequences of the opening of the strait remain unclear. We present bottom-current-related sedimentary features in the Bransfield Strait and examine the impact of the strait’s opening on deep-water circulation. Our findings show that the ocean circulation started to resemble that of the present day after a period of volcanic activity, possibly around the Middle Pleistocene. Coeval changes in Bransfield Strait morphology and an increase in seafloor irregularities due to the formation of volcanic chains finally determined new pathways for the Bransfield deep and bottom waters, enhanced due to the new climatic scenario of 100 k.y. cycles. The fact that “modernlike” oceanic circulation occurred only during previous interglacial periods demonstrates the significant impact of 100 k.y. climate cycles on the thermohaline changes of Antarctic deep waters. Hence, establishing a modern-day circulation model would enable researchers to assess paleoproductivity and local upwelling that have profoundly influenced the marine ecosystem of the Antarctic Peninsula after the Middle Pleistocene SI |
format |
Article in Journal/Newspaper |
author |
Liu, S. Hernández-Molina, F.J. Yang, C. Zhang, C. Huang, X. Yin, S. García-García, Margarita Van Rooij, D. Wang, C. Zhuo, H. Chen, H. Luo, K. Su, M. |
author_facet |
Liu, S. Hernández-Molina, F.J. Yang, C. Zhang, C. Huang, X. Yin, S. García-García, Margarita Van Rooij, D. Wang, C. Zhuo, H. Chen, H. Luo, K. Su, M. |
author_sort |
Liu, S. |
title |
Oceanographic consequences of the Bransfield Strait (Antarctica) opening |
title_short |
Oceanographic consequences of the Bransfield Strait (Antarctica) opening |
title_full |
Oceanographic consequences of the Bransfield Strait (Antarctica) opening |
title_fullStr |
Oceanographic consequences of the Bransfield Strait (Antarctica) opening |
title_full_unstemmed |
Oceanographic consequences of the Bransfield Strait (Antarctica) opening |
title_sort |
oceanographic consequences of the bransfield strait (antarctica) opening |
publishDate |
2022 |
url |
http://hdl.handle.net/10508/16448 http://hdl.handle.net/10261/318717 https://doi.org/10.1130/G50389.1 |
geographic |
Antarctic Antarctic Peninsula Bransfield Strait The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Bransfield Strait The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Weddell Sea |
op_relation |
Centro Oceanográfico de Cádiz AM 0091-7613 http://hdl.handle.net/10508/16448 http://hdl.handle.net/10261/318717 doi:10.1130/G50389.1 50638 |
op_rights |
open |
op_doi |
https://doi.org/10.1130/G50389.1 |
container_title |
Geology |
container_volume |
50 |
container_issue |
12 |
container_start_page |
1403 |
op_container_end_page |
1408 |
_version_ |
1790602458469236736 |