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

 

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dc.contributor.advisor Brundrit, Geoff en_ZA
dc.contributor.author Boyd, Alan John en_ZA
dc.date.accessioned 2014-12-02T15:01:55Z
dc.date.available 2014-12-02T15:01:55Z
dc.date.issued 1981 en_ZA
dc.identifier.citation Boyd, 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.uri http://hdl.handle.net/11427/9875
dc.description Includes bibliographical references. en_ZA
dc.description.abstract 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. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Oceanography en_ZA
dc.title An intensive study of the currents and general hydrology of an anomalous upwelling area off South West Africa en_ZA
dc.type Thesis / Dissertation en_ZA
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 en_ZA
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image


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