Über die Tiefenwasserausbreitung im Weddellmeer und in der Scotia-See: Numerische Untersuchungen der Transport- und Austauschprozesse in der Weddell-Scotia-Konfluenz-Zone
The deep Scotia Sea is filled with ventilated Weddell Sea Deep Water (WSDW). This in turn is an essential contributor to the ventilation of the World Ocean abyss. A primitive equation, hydrostatic, ocean general circulation model (BRIOS1.1) with terrain-following coordinate is used to investigate th...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | German |
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Universität Bremen
2002
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Online Access: | https://media.suub.uni-bremen.de/handle/elib/1833 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000003051 |
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/1833 2023-05-15T15:46:03+02:00 Über die Tiefenwasserausbreitung im Weddellmeer und in der Scotia-See: Numerische Untersuchungen der Transport- und Austauschprozesse in der Weddell-Scotia-Konfluenz-Zone On the spreading of deep water in the Weddell and Scotia seas Schodlok, Michael Olbers, Dirk Hellmer, Hartmut Beckmann, Aike Bleck-Neuhaus, Jörn 2002-05-02 application/pdf https://media.suub.uni-bremen.de/handle/elib/1833 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000003051 ger ger Universität Bremen FB1 Physik/Elektrotechnik https://media.suub.uni-bremen.de/handle/elib/1833 urn:nbn:de:gbv:46-diss000003051 info:eu-repo/semantics/openAccess Bitte wählen Sie eine Lizenz aus: (Unsere Empfehlung: CC-BY) CC-BY WSDW water mass spreading numerical model lagrangian trajectories Weddell Scotia Confluence 80 ddc:80 Dissertation doctoralThesis 2002 ftsubbremen 2022-11-09T07:09:41Z The deep Scotia Sea is filled with ventilated Weddell Sea Deep Water (WSDW). This in turn is an essential contributor to the ventilation of the World Ocean abyss. A primitive equation, hydrostatic, ocean general circulation model (BRIOS1.1) with terrain-following coordinate is used to investigate the water mass export from the Weddell Sea. The model is circumpolar focusing on the Weddell Sea, with particularly high resolution (~20 km) in the DOVETAIL area. The northern limb of the Weddell Gyre exhibits an eastward Weddell Sea Deep Water transport across 44°W of 24 Sv. Export rates of Weddell Sea Deep Water through gaps in theSouth Scotia Ridge are estimated to be 6.4 Sv with a semi-annual cycle of ± 0.6 Sv, which can be correlated to atmospheric cyclone activity and Weddell Gyre strength. Sensitivity studies considering extreme sea ice conditions in the Weddell Sea show higher (lower) exports in years of minimum (maximum) winter sea ice extent. This can be attributed to the local change of the surface stress achieved by wind and ice. Lagrangian particle trajectories illustrate the pathways of water masses from the inner Weddell Sea into the Scotia Sea through the major gaps in the South Scotia Ridge. They support the existing flow divergence on the northwestern continental shelf with one branch entering Bransfield Strait and the other continuing eastwards subsequently filling the deep Weddell and Scotia seas. Floats highlight the interannual variability of the flow field. Water masses flowing through the major gaps originate from the southwestern and southeastern Weddell Sea continental shelves.Water masses formed east of the Weddell Sea (e.g., Prydz Bay) also seem to feed the deep Scotia Sea. The propagation of dense water masses spreading from the southern continental shelf to the South Atlantic Ocean is estimated to be about 8 years not including residence times on the continental shelf. Doctoral or Postdoctoral Thesis Bransfield Strait Prydz Bay Scotia Sea Sea ice South Atlantic Ocean Weddell Sea Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Bransfield Strait Prydz Bay Scotia Sea South Scotia Ridge ENVELOPE(-46.500,-46.500,-60.000,-60.000) Weddell Weddell Sea |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
German |
topic |
WSDW water mass spreading numerical model lagrangian trajectories Weddell Scotia Confluence 80 ddc:80 |
spellingShingle |
WSDW water mass spreading numerical model lagrangian trajectories Weddell Scotia Confluence 80 ddc:80 Schodlok, Michael Über die Tiefenwasserausbreitung im Weddellmeer und in der Scotia-See: Numerische Untersuchungen der Transport- und Austauschprozesse in der Weddell-Scotia-Konfluenz-Zone |
topic_facet |
WSDW water mass spreading numerical model lagrangian trajectories Weddell Scotia Confluence 80 ddc:80 |
description |
The deep Scotia Sea is filled with ventilated Weddell Sea Deep Water (WSDW). This in turn is an essential contributor to the ventilation of the World Ocean abyss. A primitive equation, hydrostatic, ocean general circulation model (BRIOS1.1) with terrain-following coordinate is used to investigate the water mass export from the Weddell Sea. The model is circumpolar focusing on the Weddell Sea, with particularly high resolution (~20 km) in the DOVETAIL area. The northern limb of the Weddell Gyre exhibits an eastward Weddell Sea Deep Water transport across 44°W of 24 Sv. Export rates of Weddell Sea Deep Water through gaps in theSouth Scotia Ridge are estimated to be 6.4 Sv with a semi-annual cycle of ± 0.6 Sv, which can be correlated to atmospheric cyclone activity and Weddell Gyre strength. Sensitivity studies considering extreme sea ice conditions in the Weddell Sea show higher (lower) exports in years of minimum (maximum) winter sea ice extent. This can be attributed to the local change of the surface stress achieved by wind and ice. Lagrangian particle trajectories illustrate the pathways of water masses from the inner Weddell Sea into the Scotia Sea through the major gaps in the South Scotia Ridge. They support the existing flow divergence on the northwestern continental shelf with one branch entering Bransfield Strait and the other continuing eastwards subsequently filling the deep Weddell and Scotia seas. Floats highlight the interannual variability of the flow field. Water masses flowing through the major gaps originate from the southwestern and southeastern Weddell Sea continental shelves.Water masses formed east of the Weddell Sea (e.g., Prydz Bay) also seem to feed the deep Scotia Sea. The propagation of dense water masses spreading from the southern continental shelf to the South Atlantic Ocean is estimated to be about 8 years not including residence times on the continental shelf. |
author2 |
Olbers, Dirk Hellmer, Hartmut Beckmann, Aike Bleck-Neuhaus, Jörn |
format |
Doctoral or Postdoctoral Thesis |
author |
Schodlok, Michael |
author_facet |
Schodlok, Michael |
author_sort |
Schodlok, Michael |
title |
Über die Tiefenwasserausbreitung im Weddellmeer und in der Scotia-See: Numerische Untersuchungen der Transport- und Austauschprozesse in der Weddell-Scotia-Konfluenz-Zone |
title_short |
Über die Tiefenwasserausbreitung im Weddellmeer und in der Scotia-See: Numerische Untersuchungen der Transport- und Austauschprozesse in der Weddell-Scotia-Konfluenz-Zone |
title_full |
Über die Tiefenwasserausbreitung im Weddellmeer und in der Scotia-See: Numerische Untersuchungen der Transport- und Austauschprozesse in der Weddell-Scotia-Konfluenz-Zone |
title_fullStr |
Über die Tiefenwasserausbreitung im Weddellmeer und in der Scotia-See: Numerische Untersuchungen der Transport- und Austauschprozesse in der Weddell-Scotia-Konfluenz-Zone |
title_full_unstemmed |
Über die Tiefenwasserausbreitung im Weddellmeer und in der Scotia-See: Numerische Untersuchungen der Transport- und Austauschprozesse in der Weddell-Scotia-Konfluenz-Zone |
title_sort |
über die tiefenwasserausbreitung im weddellmeer und in der scotia-see: numerische untersuchungen der transport- und austauschprozesse in der weddell-scotia-konfluenz-zone |
publisher |
Universität Bremen |
publishDate |
2002 |
url |
https://media.suub.uni-bremen.de/handle/elib/1833 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000003051 |
long_lat |
ENVELOPE(-46.500,-46.500,-60.000,-60.000) |
geographic |
Bransfield Strait Prydz Bay Scotia Sea South Scotia Ridge Weddell Weddell Sea |
geographic_facet |
Bransfield Strait Prydz Bay Scotia Sea South Scotia Ridge Weddell Weddell Sea |
genre |
Bransfield Strait Prydz Bay Scotia Sea Sea ice South Atlantic Ocean Weddell Sea |
genre_facet |
Bransfield Strait Prydz Bay Scotia Sea Sea ice South Atlantic Ocean Weddell Sea |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/1833 urn:nbn:de:gbv:46-diss000003051 |
op_rights |
info:eu-repo/semantics/openAccess Bitte wählen Sie eine Lizenz aus: (Unsere Empfehlung: CC-BY) |
op_rightsnorm |
CC-BY |
_version_ |
1766380738427486208 |