An intensive study of the currents and general hydrology of an anomalous upwelling area off South West Africa

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dc.contributor.advisorBrundrit, Geoffen_ZA
dc.contributor.authorBoyd, Alan Johnen_ZA
dc.date.accessioned2014-12-02T15:01:55Z
dc.date.available2014-12-02T15:01:55Z
dc.date.issued1981en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractThe currents, winds and hydrology of a coastal site of approximately 120 square miles off South West Africa were studied intensively for two weeks during June/July 1978. Currents were measured by means of drogues tracked by RADAR from a central station at 45m of water depth. Classical inertial motion was observed at several depths during a calm period implying a short relaxation time for pressure gradient forces and the existence of different Velocity layers within the water column. Diurnal sea breezes and landbreezes controlled the currents at 2 and 5m depth with a response time of a few hours but the deeper currents were not directly affected by wind. Average surface current speeds were between 0,2 and 0,3 kts. Sustained southerly winds caused a deepending of the upper layer and were accompanied ~y slower currehts. Selected data recorded during the diurnal wind regime yielded the relationship: Surface current speed = 0,017 x Windspeed. A meandering poleward under-current with an average velocity of 0,07 kts was detected at 30m depth whilst onshore flow of similar average speed existed at 20m. Using the results of the experimental work as a basis, the upper layer of the sea to 8m depth was modelled as a slab, which was affected by wind, friction and the coriolis force.en_ZA
dc.identifier.apacitationBoyd, A. J. (1981). <i>An intensive study of the currents and general hydrology of an anomalous upwelling area off South West Africa</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Oceanography. Retrieved from http://hdl.handle.net/11427/9875en_ZA
dc.identifier.chicagocitationBoyd, Alan John. <i>"An intensive study of the currents and general hydrology of an anomalous upwelling area off South West Africa."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Oceanography, 1981. http://hdl.handle.net/11427/9875en_ZA
dc.identifier.citationBoyd, A. 1981. An intensive study of the currents and general hydrology of an anomalous upwelling area off South West Africa. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Boyd, Alan John AB - The currents, winds and hydrology of a coastal site of approximately 120 square miles off South West Africa were studied intensively for two weeks during June/July 1978. Currents were measured by means of drogues tracked by RADAR from a central station at 45m of water depth. Classical inertial motion was observed at several depths during a calm period implying a short relaxation time for pressure gradient forces and the existence of different Velocity layers within the water column. Diurnal sea breezes and landbreezes controlled the currents at 2 and 5m depth with a response time of a few hours but the deeper currents were not directly affected by wind. Average surface current speeds were between 0,2 and 0,3 kts. Sustained southerly winds caused a deepending of the upper layer and were accompanied ~y slower currehts. Selected data recorded during the diurnal wind regime yielded the relationship: Surface current speed = 0,017 x Windspeed. A meandering poleward under-current with an average velocity of 0,07 kts was detected at 30m depth whilst onshore flow of similar average speed existed at 20m. Using the results of the experimental work as a basis, the upper layer of the sea to 8m depth was modelled as a slab, which was affected by wind, friction and the coriolis force. DA - 1981 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1981 T1 - An intensive study of the currents and general hydrology of an anomalous upwelling area off South West Africa TI - An intensive study of the currents and general hydrology of an anomalous upwelling area off South West Africa UR - http://hdl.handle.net/11427/9875 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/9875
dc.identifier.vancouvercitationBoyd AJ. An intensive study of the currents and general hydrology of an anomalous upwelling area off South West Africa. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Oceanography, 1981 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/9875en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Oceanographyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherOceanographyen_ZA
dc.titleAn intensive study of the currents and general hydrology of an anomalous upwelling area off South West Africaen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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