From early Miocene to present: Reconstruction of the deep Thermohaline Circulation at the Eirik Drift
The Thermohaline Circulation (THC) distributes heat and freshwater around the global oceans, interacts with the atmosphere, and therefore is closely connected to the global climate. The deep branch of the North Atlantic THC mainly consists of deep-water formed by atmospheric cooling in the Nordic Se...
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ftawi:oai:epic.awi.de:35128 2024-09-15T18:03:38+00:00 From early Miocene to present: Reconstruction of the deep Thermohaline Circulation at the Eirik Drift Müller-Michaelis, Antje 2014-03-25 application/pdf https://epic.awi.de/id/eprint/35128/ https://epic.awi.de/id/eprint/35128/1/Mueller_Michaelis.pdf http://nbn-resolving.de/urn:nbn:de:gbv:46-00103689-14 https://hdl.handle.net/10013/epic.43296 https://hdl.handle.net/10013/epic.43296.d001 unknown https://epic.awi.de/id/eprint/35128/1/Mueller_Michaelis.pdf https://hdl.handle.net/10013/epic.43296.d001 Müller-Michaelis, A. (2014) From early Miocene to present: Reconstruction of the deep Thermohaline Circulation at the Eirik Drift , PhD thesis, Universität Bremen. hdl:10013/epic.43296 EPIC3101 p. Thesis notRev 2014 ftawi 2024-06-24T04:08:32Z The Thermohaline Circulation (THC) distributes heat and freshwater around the global oceans, interacts with the atmosphere, and therefore is closely connected to the global climate. The deep branch of the North Atlantic THC mainly consists of deep-water formed by atmospheric cooling in the Nordic Seas, which overflows the Greenland-Scotland Ridge into the North Atlantic. The Eirik Drift south of Greenland is located closely downstream of the North Atlantic deep-water formation region and has been shaped by the Western Boundary Undercurrent (WBUC), which constitutes the main part of the deep North Atlantic THC. The sedimentary record of the Eirik Drift documents changes of the WBUC activity, which can be related to climate changes. The analysis of the sedimentary structure in combination with geological information from scientific drilling leads to a revised seismostratigraphic concept at the Eirik Drift and reveals particularly that the Eirik Drift has been influenced by the WBUC already since the early Miocene (~19 Ma). A more detailed structural analysis of the depocenter locations and their redistribution results in a temporal reconstruction of the deep paleocirculation at the Eirik Drift. The observed changes of pathways and intensity of the WBUC at the Eirik Drift were linked to the development of the Greenland-Scotland Ridge and climate changes. The onset of drift building at the Eirk Drift followed the formation of the Faroe Conduit in early Miocene, which allowed northern sourced deep-water to overflow the eastern part of the Greenland-Scotland Ridge. A separation of the WBUC at the Eirik Drift into two branches occurred contemporaneously with the onset of deep-water overflow at the Denmark Strait, the western part of the Greenland-Scotland Ridge (~7 Ma). At the Eirik Drift, strong WBUC activity is inferred to occur during warm climates and at the beginning of cooling phases, while cooling phases with enhanced ice extent are characterized by weak WBUC activity. Based on a combination of these ... Thesis Denmark Strait Greenland Greenland-Scotland Ridge Nordic Seas North Atlantic Deep Water North Atlantic 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 Thermohaline Circulation (THC) distributes heat and freshwater around the global oceans, interacts with the atmosphere, and therefore is closely connected to the global climate. The deep branch of the North Atlantic THC mainly consists of deep-water formed by atmospheric cooling in the Nordic Seas, which overflows the Greenland-Scotland Ridge into the North Atlantic. The Eirik Drift south of Greenland is located closely downstream of the North Atlantic deep-water formation region and has been shaped by the Western Boundary Undercurrent (WBUC), which constitutes the main part of the deep North Atlantic THC. The sedimentary record of the Eirik Drift documents changes of the WBUC activity, which can be related to climate changes. The analysis of the sedimentary structure in combination with geological information from scientific drilling leads to a revised seismostratigraphic concept at the Eirik Drift and reveals particularly that the Eirik Drift has been influenced by the WBUC already since the early Miocene (~19 Ma). A more detailed structural analysis of the depocenter locations and their redistribution results in a temporal reconstruction of the deep paleocirculation at the Eirik Drift. The observed changes of pathways and intensity of the WBUC at the Eirik Drift were linked to the development of the Greenland-Scotland Ridge and climate changes. The onset of drift building at the Eirk Drift followed the formation of the Faroe Conduit in early Miocene, which allowed northern sourced deep-water to overflow the eastern part of the Greenland-Scotland Ridge. A separation of the WBUC at the Eirik Drift into two branches occurred contemporaneously with the onset of deep-water overflow at the Denmark Strait, the western part of the Greenland-Scotland Ridge (~7 Ma). At the Eirik Drift, strong WBUC activity is inferred to occur during warm climates and at the beginning of cooling phases, while cooling phases with enhanced ice extent are characterized by weak WBUC activity. Based on a combination of these ... |
format |
Thesis |
author |
Müller-Michaelis, Antje |
spellingShingle |
Müller-Michaelis, Antje From early Miocene to present: Reconstruction of the deep Thermohaline Circulation at the Eirik Drift |
author_facet |
Müller-Michaelis, Antje |
author_sort |
Müller-Michaelis, Antje |
title |
From early Miocene to present: Reconstruction of the deep Thermohaline Circulation at the Eirik Drift |
title_short |
From early Miocene to present: Reconstruction of the deep Thermohaline Circulation at the Eirik Drift |
title_full |
From early Miocene to present: Reconstruction of the deep Thermohaline Circulation at the Eirik Drift |
title_fullStr |
From early Miocene to present: Reconstruction of the deep Thermohaline Circulation at the Eirik Drift |
title_full_unstemmed |
From early Miocene to present: Reconstruction of the deep Thermohaline Circulation at the Eirik Drift |
title_sort |
from early miocene to present: reconstruction of the deep thermohaline circulation at the eirik drift |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/35128/ https://epic.awi.de/id/eprint/35128/1/Mueller_Michaelis.pdf http://nbn-resolving.de/urn:nbn:de:gbv:46-00103689-14 https://hdl.handle.net/10013/epic.43296 https://hdl.handle.net/10013/epic.43296.d001 |
genre |
Denmark Strait Greenland Greenland-Scotland Ridge Nordic Seas North Atlantic Deep Water North Atlantic |
genre_facet |
Denmark Strait Greenland Greenland-Scotland Ridge Nordic Seas North Atlantic Deep Water North Atlantic |
op_source |
EPIC3101 p. |
op_relation |
https://epic.awi.de/id/eprint/35128/1/Mueller_Michaelis.pdf https://hdl.handle.net/10013/epic.43296.d001 Müller-Michaelis, A. (2014) From early Miocene to present: Reconstruction of the deep Thermohaline Circulation at the Eirik Drift , PhD thesis, Universität Bremen. hdl:10013/epic.43296 |
_version_ |
1810441111971299328 |