Variability of the ice-ocean system in the Pacific sector of the Southern Ocean: numerical model studies
Antarktica, numerical modelling, ocean, sea ice, ice shelf. - In the framework of BRIOS (Bremerhaven Ice Ocean Simulations) a coupled ice-ocean model of the Southern Ocean was adapted to investigate the variability of the ice-ocean system in the Pacific sector of the Southern Ocean with a particular...
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| Language: | English |
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Staats- und Universitätsbibliothek [Host]
2003
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| Online Access: | http://nbn-resolving.de/urn:nbn:de:gbv:46-diss000007901 http://webdoc.sub.gwdg.de/ebook/diss/Bremen/2004/E-Diss790_assmann.pdf |
| Summary: | Antarktica, numerical modelling, ocean, sea ice, ice shelf. - In the framework of BRIOS (Bremerhaven Ice Ocean Simulations) a coupled ice-ocean model of the Southern Ocean was adapted to investigate the variability of the ice-ocean system in the Pacific sector of the Southern Ocean with a particular focus on the factors affecting dense water formation on the Ross Sea continental shelf. The sea ice regimes in the western and eastern Ross Sea were shown to be decoupled from each other with sea ice characteristics in the western Ross Sea determined predominantly by the local atmospheric conditions and those in the eastern Ross Sea by ice import from the Amundsen Sea. The resulting strong gradient in sea ice formation provides the thermohaline driving force for the shelf circulation. The cooling, salt input and subsequent deep convection during the seasonal cycle modifies the waters of the shelf inflow so that their density is sufficient participate in Antarctic Bottom Water formation.Model results show that the region around Ross Island and McMurdo Sound has a key role in controlling the exchange between the ice shelf cavity and the open ocean in the Ross Sea. Drainage of High Salinity Shelf Water through . @Bremen, Univ., Diss., 2004 |
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