A two-mode numerical model with applications to coastal upwelling

 

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dc.contributor.advisor Harris, T F W en_ZA
dc.contributor.author Van Foreest, Dirk en_ZA
dc.date.accessioned 2016-02-12T07:16:36Z
dc.date.available 2016-02-12T07:16:36Z
dc.date.issued 1981 en_ZA
dc.identifier.citation Van Foreest, D. 1981. A two-mode numerical model with applications to coastal upwelling. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/16988
dc.description Includes bibliography. en_ZA
dc.description.abstract A first picture of the Agulhas current is obtained from data of the Quasi synoptic Agulhas current cruise of March 1969. Reinterpretation of other hydrographic data was possible in the light of the 1969 cruise and the information obtained from satellite tracked buoys. For the 1969 cruise acceleration potential diagrams on various sigma-t levels are discussed and indicate that certain features in the current are of such a scale (length and time) that only closely spaced synoptic stations will show them. Of special interest are the following features: two main supplies to the current; a region of dynamical upwelling between East London and Port Elizabeth; the region where the eastward (retroflection); the interaction with the South East Atlantic ocean; the planetary waves in the Agulhas return current over and east of the Agulhas plateau. Volume flux calculations (reference 1100m.) show that the two supplies to the Agulhas current could be estimated at 15 sverdrups each. The main part of the current turns back into the South West Indian ocean. An amount of roughly 5 sverdrups was lost East Atlantic. Property distributions although difficult to interpret, were used to construct the acceleration potential diagrams as the contouring of these diagrams was not always obvious. For a more detailed discussion of the combined data the current system was divided into areas. These areas are: Source area (including the inflow south of Durban and the countercurrent at Durban; Dynamical upwelling region; Mixing and retroflection area; Planetary wave region. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Oceanography en_ZA
dc.title A two-mode numerical model with applications to coastal upwelling en_ZA
dc.type Doctoral Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Oceanography en_ZA
dc.type.qualificationlevel Doctoral
dc.type.qualificationname PhD en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Van Foreest, D. (1981). <i>A two-mode numerical model with applications to coastal upwelling</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Oceanography. Retrieved from http://hdl.handle.net/11427/16988 en_ZA
dc.identifier.chicagocitation Van Foreest, Dirk. <i>"A two-mode numerical model with applications to coastal upwelling."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Oceanography, 1981. http://hdl.handle.net/11427/16988 en_ZA
dc.identifier.vancouvercitation Van Foreest D. A two-mode numerical model with applications to coastal upwelling. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Oceanography, 1981 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/16988 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Van Foreest, Dirk AB - A first picture of the Agulhas current is obtained from data of the Quasi synoptic Agulhas current cruise of March 1969. Reinterpretation of other hydrographic data was possible in the light of the 1969 cruise and the information obtained from satellite tracked buoys. For the 1969 cruise acceleration potential diagrams on various sigma-t levels are discussed and indicate that certain features in the current are of such a scale (length and time) that only closely spaced synoptic stations will show them. Of special interest are the following features: two main supplies to the current; a region of dynamical upwelling between East London and Port Elizabeth; the region where the eastward (retroflection); the interaction with the South East Atlantic ocean; the planetary waves in the Agulhas return current over and east of the Agulhas plateau. Volume flux calculations (reference 1100m.) show that the two supplies to the Agulhas current could be estimated at 15 sverdrups each. The main part of the current turns back into the South West Indian ocean. An amount of roughly 5 sverdrups was lost East Atlantic. Property distributions although difficult to interpret, were used to construct the acceleration potential diagrams as the contouring of these diagrams was not always obvious. For a more detailed discussion of the combined data the current system was divided into areas. These areas are: Source area (including the inflow south of Durban and the countercurrent at Durban; Dynamical upwelling region; Mixing and retroflection area; Planetary wave region. DA - 1981 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1981 T1 - A two-mode numerical model with applications to coastal upwelling TI - A two-mode numerical model with applications to coastal upwelling UR - http://hdl.handle.net/11427/16988 ER - en_ZA


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