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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Centro Oceanográfico de Cádiz
2022
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Online Access: | http://hdl.handle.net/10508/16448 https://doi.org/10.1130/G50389.1 |
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ftieo:oai:repositorio.ieo.es:10508/16448 2023-05-15T14:00:17+02:00 Oceanographic consequences of the Bransfield Strait (Antarctica) opening Liu, S. Hernández-Molina, F.J. Yang, C. Zhang, C. Huang, X. Yin, S. García-García, M. (Margarita) Van Rooij, D. Wang, C. Zhuo, H. Chen, H. Luo, K. Su, M. 2022-11-09T12:06:24Z http://hdl.handle.net/10508/16448 https://doi.org/10.1130/G50389.1 eng eng Centro Oceanográfico de Cádiz 0091-7613 http://hdl.handle.net/10508/16448 doi:10.1130/G50389.1 embargoed access geology volume plate tectonics facies tomography research article AM 2022 ftieo https://doi.org/10.1130/G50389.1 2022-11-16T00:47:11Z 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 3,612 Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Weddell Sea Instituto Español de Oceanografía: e-IEO Antarctic The Antarctic Antarctic Peninsula Weddell Sea Bransfield Strait Weddell Geology 50 12 1403 1408 |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
op_collection_id |
ftieo |
language |
English |
topic |
geology volume plate tectonics facies tomography |
spellingShingle |
geology volume plate tectonics facies tomography Liu, S. Hernández-Molina, F.J. Yang, C. Zhang, C. Huang, X. Yin, S. García-García, M. (Margarita) Van Rooij, D. Wang, C. Zhuo, H. Chen, H. Luo, K. Su, M. Oceanographic consequences of the Bransfield Strait (Antarctica) opening |
topic_facet |
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 3,612 |
format |
Article in Journal/Newspaper |
author |
Liu, S. Hernández-Molina, F.J. Yang, C. Zhang, C. Huang, X. Yin, S. García-García, M. (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, M. (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 |
publisher |
Centro Oceanográfico de Cádiz |
publishDate |
2022 |
url |
http://hdl.handle.net/10508/16448 https://doi.org/10.1130/G50389.1 |
geographic |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Bransfield Strait Weddell |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Bransfield Strait Weddell |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Weddell Sea |
op_relation |
0091-7613 http://hdl.handle.net/10508/16448 doi:10.1130/G50389.1 |
op_rights |
embargoed access |
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_ |
1766269328316956672 |