A descriptive physical analysis of water movement in the South West African Indian Ocean during the Northeast monsoon season

 

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dc.contributor.advisor Harris, T F W en_ZA
dc.contributor.author Lutjeharms, Johann R E en_ZA
dc.date.accessioned 2016-03-21T19:26:05Z
dc.date.available 2016-03-21T19:26:05Z
dc.date.issued 1971 en_ZA
dc.identifier.citation Lutjeharms, J. 1971. A descriptive physical analysis of water movement in the South West African Indian Ocean during the Northeast monsoon season. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/18123
dc.description.abstract The Agulhas Current is unique as a western boundary current in having as its source of surface water currents that are linked to the variable current regions of the North Indian Ocean. In which way the Agulhas Current derives its supply from these currents and how these currents interrelate, is very poorly understood. In an attempt to make a contribution to the understanding of this flow an isentropic analysis in depth on seven σt-surfaces for the whole South West Indian Ocean during the Northeast Monsoon season was carried out. This analysis was augmented by the calculation of the velocities according to the Witte-Margules equation on each σt-surface at ten selected vertical sections. In addition the detailed volume transport and the velocity structure for each vertical section were calculated. The results pointed to a significant variation in transport and velocity structure from year to year. The large scale circulation in depth of the ocean is described. It is found that the Agulhas Current derives its supply of water from different sources at different depths and that at depth a large measure of recirculation of Agulhas Current Water takes place. It is not thought that this has been reported before and these findings might be of importance to the understanding of the current system as a whole. A few innovations in the standard oceanographic methods are described and two computer programs to aid analyses are presented. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Oceanography en_ZA
dc.title A descriptive physical analysis of water movement in the South West African Indian Ocean during the Northeast monsoon season en_ZA
dc.type Master 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 Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Lutjeharms, J. R. E. (1971). <i>A descriptive physical analysis of water movement in the South West African Indian Ocean during the Northeast monsoon season</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Oceanography. Retrieved from http://hdl.handle.net/11427/18123 en_ZA
dc.identifier.chicagocitation Lutjeharms, Johann R E. <i>"A descriptive physical analysis of water movement in the South West African Indian Ocean during the Northeast monsoon season."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Oceanography, 1971. http://hdl.handle.net/11427/18123 en_ZA
dc.identifier.vancouvercitation Lutjeharms JRE. A descriptive physical analysis of water movement in the South West African Indian Ocean during the Northeast monsoon season. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Oceanography, 1971 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18123 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Lutjeharms, Johann R E AB - The Agulhas Current is unique as a western boundary current in having as its source of surface water currents that are linked to the variable current regions of the North Indian Ocean. In which way the Agulhas Current derives its supply from these currents and how these currents interrelate, is very poorly understood. In an attempt to make a contribution to the understanding of this flow an isentropic analysis in depth on seven σt-surfaces for the whole South West Indian Ocean during the Northeast Monsoon season was carried out. This analysis was augmented by the calculation of the velocities according to the Witte-Margules equation on each σt-surface at ten selected vertical sections. In addition the detailed volume transport and the velocity structure for each vertical section were calculated. The results pointed to a significant variation in transport and velocity structure from year to year. The large scale circulation in depth of the ocean is described. It is found that the Agulhas Current derives its supply of water from different sources at different depths and that at depth a large measure of recirculation of Agulhas Current Water takes place. It is not thought that this has been reported before and these findings might be of importance to the understanding of the current system as a whole. A few innovations in the standard oceanographic methods are described and two computer programs to aid analyses are presented. DA - 1971 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1971 T1 - A descriptive physical analysis of water movement in the South West African Indian Ocean during the Northeast monsoon season TI - A descriptive physical analysis of water movement in the South West African Indian Ocean during the Northeast monsoon season UR - http://hdl.handle.net/11427/18123 ER - en_ZA


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