Composite structure of tropical cyclones in the SW Indian Ocean

 

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dc.contributor.advisor Jury, Mark R en_ZA
dc.contributor.author Parker, Bhawoodien Abbasmia en_ZA
dc.date.accessioned 2016-05-09T09:03:07Z
dc.date.available 2016-05-09T09:03:07Z
dc.date.issued 1994 en_ZA
dc.identifier.citation Parker, B. 1994. Composite structure of tropical cyclones in the SW Indian Ocean. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/19524
dc.description.abstract This work examines SW Indian Ocean tropical cyclone (TC) structure as a function of movement using ECMWF gridded data. Analyses of the mean summer climate for the period 1987­ 1992 shown that conditions conducive to the development ofTCs are present between the latitudes 5° and 15°S. Six westward moving TCs are selected to form the westward moving composite TC and four are used in the recurving TC composite from 3-days before the maximum surface intensity to 1­ day after. The westward moving composite was found to have a steady TC signature. Comparisons were made with TC Firinga which passed near Mauritius on 29 January 1989. The recurving TC composite was found to exhibit rapid growth with sharp parameters tendencies. Interaction with a sub­ tropical trough is seen in both TC composites. Upper level westerly winds create effective uplift which strengthens the recurving TC on the poleward side. Spectral analysis of a rainfall index compiled from Mauritius data demonstrates spectral peaks at the seasonal and intra-seasonal scale. Three peaks were identified. one within the 40-60 day Madden­ Julian Oscillation. one at 23 days and one with a 16 day oscillation. The 23 day oscillation was found to have a highest spectral power. The results of TC and rainfall analyses offer useful insights to the climate and weather of the SW Indian Ocean. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Oceanography en_ZA
dc.title Composite structure of tropical cyclones in the SW Indian Ocean 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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