Late Quaternary terrigenous sediment supply in the Drake Passage in response to Patagonian and Antarctic ice dynamics
The Drake Passage, as the narrowest passage around Antarctica, exerts significant influences on the physical, chemical, and biological interactions between the Pacific and Atlantic Ocean. Here, we identify terrigenous sediment sources and transport pathways in the Drake Passage region over the past...
Published in: | Global and Planetary Change |
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Online Access: | https://epic.awi.de/id/eprint/57598/ https://epic.awi.de/id/eprint/57598/1/1-s2.0-S0921818122002910-main-2.pdf https://hdl.handle.net/10013/epic.a7b6a535-471c-41c3-b63e-24b6c0fde892 |
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ftawi:oai:epic.awi.de:57598 2024-09-15T17:46:51+00:00 Late Quaternary terrigenous sediment supply in the Drake Passage in response to Patagonian and Antarctic ice dynamics Wu, Shuzhuang Kuhn, Gerhard Arz, Helge W Lembke-Jene, Lester Tiedemann, Ralf Lamy, Frank Diekmann, Bernhard 2023-02-01 application/pdf https://epic.awi.de/id/eprint/57598/ https://epic.awi.de/id/eprint/57598/1/1-s2.0-S0921818122002910-main-2.pdf https://hdl.handle.net/10013/epic.a7b6a535-471c-41c3-b63e-24b6c0fde892 unknown Elsevier https://epic.awi.de/id/eprint/57598/1/1-s2.0-S0921818122002910-main-2.pdf Wu, S. , Kuhn, G. , Arz, H. W. , Lembke-Jene, L. orcid:0000-0002-6873-8533 , Tiedemann, R. orcid:0000-0001-7211-8049 , Lamy, F. orcid:0000-0001-5952-1765 and Diekmann, B. (2023) Late Quaternary terrigenous sediment supply in the Drake Passage in response to Patagonian and Antarctic ice dynamics , Global and Planetary Change, 221 . doi:10.1016/j.gloplacha.2022.104024 <https://doi.org/10.1016/j.gloplacha.2022.104024> , hdl:10013/epic.a7b6a535-471c-41c3-b63e-24b6c0fde892 EPIC3Global and Planetary Change, Elsevier, 221, 9 p., ISSN: 0921-8181 Article isiRev 2023 ftawi https://doi.org/10.1016/j.gloplacha.2022.104024 2024-06-24T04:30:12Z The Drake Passage, as the narrowest passage around Antarctica, exerts significant influences on the physical, chemical, and biological interactions between the Pacific and Atlantic Ocean. Here, we identify terrigenous sediment sources and transport pathways in the Drake Passage region over the past 140 ka BP (thousand years before present), based on grain size, clay mineral assemblages, geochemistry and mass-specific magnetic susceptibility records. Terrigenous sediment supply in the Drake Passage is mainly derived from the southeast Pacific, southern South America and the Antarctic Peninsula. Our results provide robust evidence that the Antarctic Circumpolar Current (ACC) has served as the key driver for sediment dispersal in the Drake Passage. High glacial mass accumulation rates indicate enhanced detrital input, which was closely linked to a large expansion of ice sheets in southern South America and on the Antarctic Peninsula during the glacial maximum, as significantly advanced glaciers eroded more glaciogenic sediments from the continental hinterlands into the Drake Passage. Moreover, lower glacial sea levels exposed large continental shelves, which together with weakened ACC strength likely amplified the efficiency of sediment supply and deposition in the deep ocean. In contrast, significant glaciers' shrinkage during interglacials, together with higher sea-level conditions and storage of sediment in nearby fjords reduced terrigenous sediment inputs. Furthermore, a stronger ACC may have induced winnowing effects and further lowered the mass accumulation rates. Evolution of ice sheets, sea level changes and climate related ACC dynamic have thus exerted critical influences on the terrigenous sediment supply and deposition in the Drake Passage region over the last glacial-interglacial cycle. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Drake Passage Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Global and Planetary Change 221 104024 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The Drake Passage, as the narrowest passage around Antarctica, exerts significant influences on the physical, chemical, and biological interactions between the Pacific and Atlantic Ocean. Here, we identify terrigenous sediment sources and transport pathways in the Drake Passage region over the past 140 ka BP (thousand years before present), based on grain size, clay mineral assemblages, geochemistry and mass-specific magnetic susceptibility records. Terrigenous sediment supply in the Drake Passage is mainly derived from the southeast Pacific, southern South America and the Antarctic Peninsula. Our results provide robust evidence that the Antarctic Circumpolar Current (ACC) has served as the key driver for sediment dispersal in the Drake Passage. High glacial mass accumulation rates indicate enhanced detrital input, which was closely linked to a large expansion of ice sheets in southern South America and on the Antarctic Peninsula during the glacial maximum, as significantly advanced glaciers eroded more glaciogenic sediments from the continental hinterlands into the Drake Passage. Moreover, lower glacial sea levels exposed large continental shelves, which together with weakened ACC strength likely amplified the efficiency of sediment supply and deposition in the deep ocean. In contrast, significant glaciers' shrinkage during interglacials, together with higher sea-level conditions and storage of sediment in nearby fjords reduced terrigenous sediment inputs. Furthermore, a stronger ACC may have induced winnowing effects and further lowered the mass accumulation rates. Evolution of ice sheets, sea level changes and climate related ACC dynamic have thus exerted critical influences on the terrigenous sediment supply and deposition in the Drake Passage region over the last glacial-interglacial cycle. |
format |
Article in Journal/Newspaper |
author |
Wu, Shuzhuang Kuhn, Gerhard Arz, Helge W Lembke-Jene, Lester Tiedemann, Ralf Lamy, Frank Diekmann, Bernhard |
spellingShingle |
Wu, Shuzhuang Kuhn, Gerhard Arz, Helge W Lembke-Jene, Lester Tiedemann, Ralf Lamy, Frank Diekmann, Bernhard Late Quaternary terrigenous sediment supply in the Drake Passage in response to Patagonian and Antarctic ice dynamics |
author_facet |
Wu, Shuzhuang Kuhn, Gerhard Arz, Helge W Lembke-Jene, Lester Tiedemann, Ralf Lamy, Frank Diekmann, Bernhard |
author_sort |
Wu, Shuzhuang |
title |
Late Quaternary terrigenous sediment supply in the Drake Passage in response to Patagonian and Antarctic ice dynamics |
title_short |
Late Quaternary terrigenous sediment supply in the Drake Passage in response to Patagonian and Antarctic ice dynamics |
title_full |
Late Quaternary terrigenous sediment supply in the Drake Passage in response to Patagonian and Antarctic ice dynamics |
title_fullStr |
Late Quaternary terrigenous sediment supply in the Drake Passage in response to Patagonian and Antarctic ice dynamics |
title_full_unstemmed |
Late Quaternary terrigenous sediment supply in the Drake Passage in response to Patagonian and Antarctic ice dynamics |
title_sort |
late quaternary terrigenous sediment supply in the drake passage in response to patagonian and antarctic ice dynamics |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://epic.awi.de/id/eprint/57598/ https://epic.awi.de/id/eprint/57598/1/1-s2.0-S0921818122002910-main-2.pdf https://hdl.handle.net/10013/epic.a7b6a535-471c-41c3-b63e-24b6c0fde892 |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Drake Passage |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Drake Passage |
op_source |
EPIC3Global and Planetary Change, Elsevier, 221, 9 p., ISSN: 0921-8181 |
op_relation |
https://epic.awi.de/id/eprint/57598/1/1-s2.0-S0921818122002910-main-2.pdf Wu, S. , Kuhn, G. , Arz, H. W. , Lembke-Jene, L. orcid:0000-0002-6873-8533 , Tiedemann, R. orcid:0000-0001-7211-8049 , Lamy, F. orcid:0000-0001-5952-1765 and Diekmann, B. (2023) Late Quaternary terrigenous sediment supply in the Drake Passage in response to Patagonian and Antarctic ice dynamics , Global and Planetary Change, 221 . doi:10.1016/j.gloplacha.2022.104024 <https://doi.org/10.1016/j.gloplacha.2022.104024> , hdl:10013/epic.a7b6a535-471c-41c3-b63e-24b6c0fde892 |
op_doi |
https://doi.org/10.1016/j.gloplacha.2022.104024 |
container_title |
Global and Planetary Change |
container_volume |
221 |
container_start_page |
104024 |
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1810495261845225472 |