Onset and modifications in intensity and pathways of water mass exchange between the Southeast Pacific and the South Atlantic
The opening of Drake Passage and the Scotia Sea enabled the exchange of water masses between the southern Pacific and the South Atlantic. In this way heat and energy could be transferred between the two oceans. Together with the opening of the Tasman Gateway this allowed the establishment of the Ant...
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ftawi:oai:epic.awi.de:42341 2024-09-15T17:45:02+00:00 Onset and modifications in intensity and pathways of water mass exchange between the Southeast Pacific and the South Atlantic Uenzelmann-Neben, Gabriele 2016-11-29 https://epic.awi.de/id/eprint/42341/ https://hdl.handle.net/10013/epic.49045 unknown Uenzelmann-Neben, G. orcid:0000-0002-0115-5923 (2016) Onset and modifications in intensity and pathways of water mass exchange between the Southeast Pacific and the South Atlantic , Bilateral workshop on Cooperation in Marine Sciences between Argentina and Germany, Buenos Aires, Argentina, 29 November 2016 - 1 December 2016 . hdl:10013/epic.49045 EPIC3Bilateral workshop on Cooperation in Marine Sciences between Argentina and Germany, Buenos Aires, Argentina, 2016-11-29-2016-12-01 Conference notRev 2016 ftawi 2024-06-24T04:15:36Z The opening of Drake Passage and the Scotia Sea enabled the exchange of water masses between the southern Pacific and the South Atlantic. In this way heat and energy could be transferred between the two oceans. Together with the opening of the Tasman Gateway this allowed the establishment of the Antarctic Circumpolar Current (ACC) thermally isolating Antarctica, which has been considered a one of the major causes for the onset of widespread glaciation. Both tectonic movements within Drake Passage and the Scotia Sea as well as modifications in climate have led to changes in intensity and pathway of the ACC and the water masses flowing within it. The onset of the ACC and those changes have been documented in sedimentary structures deposited on the Falkland Plateau. A study of the sediment drifts shaped by Circumpolar Deepwater, Weddell Sea Deepwater and Antarctic Bottomwater using high-resolution seismic reflection data will provide information on modifications of the circulation resulting from tectonic movements and changes in climate. Additionally, we will collect site survey data for an IODP proposal set on studying the earliest phase of water mass exchange via Drake Passage. The deep and bottom water masses flowing within the ACC (Antarctic Bottom Water (AABW), WSDW, SPDW, LCDW, UCDW) are steered by the complex topography of the Drake Passage and the Scotia Sea. Rounding topographic highs the water masses reduce their speed and hence deposit sediment while their speed is increased in gaps and passages rather leading to erosion and non-deposition. In this way the aforementioned water masses shape sediment drifts, which in their structure (geometry, internal unconformities, reflection characteristics) document the modifications in the flow paths and intensities of the water masses. The tectonic development of both the Drake Passage and the Scotia Sea during the Cenozoic have led to strong modifications in the flow paths, which, when studying sediment drifts, can be deciphered. Additionally, the ACC fronts are ... Conference Object Antarc* Antarctic Antarctica Drake Passage Scotia Sea Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The opening of Drake Passage and the Scotia Sea enabled the exchange of water masses between the southern Pacific and the South Atlantic. In this way heat and energy could be transferred between the two oceans. Together with the opening of the Tasman Gateway this allowed the establishment of the Antarctic Circumpolar Current (ACC) thermally isolating Antarctica, which has been considered a one of the major causes for the onset of widespread glaciation. Both tectonic movements within Drake Passage and the Scotia Sea as well as modifications in climate have led to changes in intensity and pathway of the ACC and the water masses flowing within it. The onset of the ACC and those changes have been documented in sedimentary structures deposited on the Falkland Plateau. A study of the sediment drifts shaped by Circumpolar Deepwater, Weddell Sea Deepwater and Antarctic Bottomwater using high-resolution seismic reflection data will provide information on modifications of the circulation resulting from tectonic movements and changes in climate. Additionally, we will collect site survey data for an IODP proposal set on studying the earliest phase of water mass exchange via Drake Passage. The deep and bottom water masses flowing within the ACC (Antarctic Bottom Water (AABW), WSDW, SPDW, LCDW, UCDW) are steered by the complex topography of the Drake Passage and the Scotia Sea. Rounding topographic highs the water masses reduce their speed and hence deposit sediment while their speed is increased in gaps and passages rather leading to erosion and non-deposition. In this way the aforementioned water masses shape sediment drifts, which in their structure (geometry, internal unconformities, reflection characteristics) document the modifications in the flow paths and intensities of the water masses. The tectonic development of both the Drake Passage and the Scotia Sea during the Cenozoic have led to strong modifications in the flow paths, which, when studying sediment drifts, can be deciphered. Additionally, the ACC fronts are ... |
format |
Conference Object |
author |
Uenzelmann-Neben, Gabriele |
spellingShingle |
Uenzelmann-Neben, Gabriele Onset and modifications in intensity and pathways of water mass exchange between the Southeast Pacific and the South Atlantic |
author_facet |
Uenzelmann-Neben, Gabriele |
author_sort |
Uenzelmann-Neben, Gabriele |
title |
Onset and modifications in intensity and pathways of water mass exchange between the Southeast Pacific and the South Atlantic |
title_short |
Onset and modifications in intensity and pathways of water mass exchange between the Southeast Pacific and the South Atlantic |
title_full |
Onset and modifications in intensity and pathways of water mass exchange between the Southeast Pacific and the South Atlantic |
title_fullStr |
Onset and modifications in intensity and pathways of water mass exchange between the Southeast Pacific and the South Atlantic |
title_full_unstemmed |
Onset and modifications in intensity and pathways of water mass exchange between the Southeast Pacific and the South Atlantic |
title_sort |
onset and modifications in intensity and pathways of water mass exchange between the southeast pacific and the south atlantic |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/42341/ https://hdl.handle.net/10013/epic.49045 |
genre |
Antarc* Antarctic Antarctica Drake Passage Scotia Sea Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Drake Passage Scotia Sea Weddell Sea |
op_source |
EPIC3Bilateral workshop on Cooperation in Marine Sciences between Argentina and Germany, Buenos Aires, Argentina, 2016-11-29-2016-12-01 |
op_relation |
Uenzelmann-Neben, G. orcid:0000-0002-0115-5923 (2016) Onset and modifications in intensity and pathways of water mass exchange between the Southeast Pacific and the South Atlantic , Bilateral workshop on Cooperation in Marine Sciences between Argentina and Germany, Buenos Aires, Argentina, 29 November 2016 - 1 December 2016 . hdl:10013/epic.49045 |
_version_ |
1810492735488000000 |