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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2022
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ftunivgent:oai:archive.ugent.be:01GRXJAV2BEFBHMADFF0R98ZBH 2023-10-01T03:51:18+02:00 Oceanographic consequences of the Bransfield Strait (Antarctica) opening Liu, Shan Hernandez-Molina, F. Javier Yang, Chupeng Zhang, Cuimei Huang, Xiaoxia Yin, Shaoru Garcia, Marga Van Rooij, David Wang, Ce Zhuo, Haiteng Chen, Hui Lei, Yaping Lin, Zhixuan Luo, Kunwen Su, Ming 2022 application/pdf https://biblio.ugent.be/publication/01GRXJAV2BEFBHMADFF0R98ZBH http://hdl.handle.net/1854/LU-01GRXJAV2BEFBHMADFF0R98ZBH https://doi.org/10.1130/G50389.1 https://biblio.ugent.be/publication/01GRXJAV2BEFBHMADFF0R98ZBH/file/01GRXJGPRNZNGSAXAGKG67Y2NH eng eng https://biblio.ugent.be/publication/01GRXJAV2BEFBHMADFF0R98ZBH http://hdl.handle.net/1854/LU-01GRXJAV2BEFBHMADFF0R98ZBH http://dx.doi.org/10.1130/G50389.1 https://biblio.ugent.be/publication/01GRXJAV2BEFBHMADFF0R98ZBH/file/01GRXJGPRNZNGSAXAGKG67Y2NH No license (in copyright) info:eu-repo/semantics/restrictedAccess GEOLOGY ISSN: 0091-7613 ISSN: 1943-2682 Earth and Environmental Sciences WEDDELL SEA SEDIMENTARY PROCESSES ICE-SHEET PENINSULA MARGIN EVOLUTION BASIN WATER DEEP STRATIGRAPHY journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2022 ftunivgent https://doi.org/10.1130/G50389.1 2023-09-06T22:22:53Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Ice Sheet Weddell Sea Ghent University Academic Bibliography Antarctic The Antarctic Antarctic Peninsula Weddell Sea Bransfield Strait Weddell Geology 50 12 1403 1408 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Earth and Environmental Sciences WEDDELL SEA SEDIMENTARY PROCESSES ICE-SHEET PENINSULA MARGIN EVOLUTION BASIN WATER DEEP STRATIGRAPHY |
spellingShingle |
Earth and Environmental Sciences WEDDELL SEA SEDIMENTARY PROCESSES ICE-SHEET PENINSULA MARGIN EVOLUTION BASIN WATER DEEP STRATIGRAPHY Liu, Shan Hernandez-Molina, F. Javier Yang, Chupeng Zhang, Cuimei Huang, Xiaoxia Yin, Shaoru Garcia, Marga Van Rooij, David Wang, Ce Zhuo, Haiteng Chen, Hui Lei, Yaping Lin, Zhixuan Luo, Kunwen Su, Ming Oceanographic consequences of the Bransfield Strait (Antarctica) opening |
topic_facet |
Earth and Environmental Sciences WEDDELL SEA SEDIMENTARY PROCESSES ICE-SHEET PENINSULA MARGIN EVOLUTION BASIN WATER DEEP STRATIGRAPHY |
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. |
format |
Article in Journal/Newspaper |
author |
Liu, Shan Hernandez-Molina, F. Javier Yang, Chupeng Zhang, Cuimei Huang, Xiaoxia Yin, Shaoru Garcia, Marga Van Rooij, David Wang, Ce Zhuo, Haiteng Chen, Hui Lei, Yaping Lin, Zhixuan Luo, Kunwen Su, Ming |
author_facet |
Liu, Shan Hernandez-Molina, F. Javier Yang, Chupeng Zhang, Cuimei Huang, Xiaoxia Yin, Shaoru Garcia, Marga Van Rooij, David Wang, Ce Zhuo, Haiteng Chen, Hui Lei, Yaping Lin, Zhixuan Luo, Kunwen Su, Ming |
author_sort |
Liu, Shan |
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 |
https://biblio.ugent.be/publication/01GRXJAV2BEFBHMADFF0R98ZBH http://hdl.handle.net/1854/LU-01GRXJAV2BEFBHMADFF0R98ZBH https://doi.org/10.1130/G50389.1 https://biblio.ugent.be/publication/01GRXJAV2BEFBHMADFF0R98ZBH/file/01GRXJGPRNZNGSAXAGKG67Y2NH |
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 Ice Sheet Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Ice Sheet Weddell Sea |
op_source |
GEOLOGY ISSN: 0091-7613 ISSN: 1943-2682 |
op_relation |
https://biblio.ugent.be/publication/01GRXJAV2BEFBHMADFF0R98ZBH http://hdl.handle.net/1854/LU-01GRXJAV2BEFBHMADFF0R98ZBH http://dx.doi.org/10.1130/G50389.1 https://biblio.ugent.be/publication/01GRXJAV2BEFBHMADFF0R98ZBH/file/01GRXJGPRNZNGSAXAGKG67Y2NH |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
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_ |
1778534708438630400 |