The inter-annual variability in the onset of the enhanced chlorophyll-a east of Madagascar

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dc.contributor.advisorReason, Chrisen_ZA
dc.contributor.advisorHermes, Juliet Cen_ZA
dc.contributor.advisorCollins, Charineen_ZA
dc.contributor.authorOozeeraully, Yuneeda Bibi Naheeden_ZA
dc.date.accessioned2015-12-08T11:41:44Z
dc.date.available2015-12-08T11:41:44Z
dc.date.issued2015en_ZA
dc.description.abstractChlorophyll-a concentration is a measure of phytoplankton biomass and is therefore used as a proxy for primary production. The chlorophyll bloom occurring in the South western Indian Ocean is one of the major blooms in the open ocean and is subject to controversies about its formation, propagation and termination mechanisms. In this study, the region was divided into two sub-regions, the South East region (48°E-66°E, 24°S-30°S) and the East region (70°E-88°E, 24°S-30°S) and satellite datasets of chlorophyll-a, sea surface temperature, wind speed and direction and sea surface height were analysed. A bloom was characterized by twice the mean level of the sub-region (~0.08mg/m3) and three bloom years were identified: 2004, 2006 and 2008. The timing, propagation and termination of the bloom showed spatial and temporal variability. The wavelet analysis revealed a semi-annual signal for 2006 and 2008 and an annual one in 2004 due to the gradual decline in the concentration of chlorophyll-a. The transport of the bloom is affected by the passage of eddies where the concentration of chlorophyll-a is higher in the core and around the edges in cyclonic and anticyclonic eddies respectively. The bloom could be present at the sub-surface level throughout the years but is only apparent at the surface during specific years.en_ZA
dc.identifier.apacitationOozeeraully, Y. B. N. (2015). <i>The inter-annual variability in the onset of the enhanced chlorophyll-a east of Madagascar</i>. (Thesis). University of Cape Town ,Faculty of Science ,Marine Research (MA-RE) Institute. Retrieved from http://hdl.handle.net/11427/15686en_ZA
dc.identifier.chicagocitationOozeeraully, Yuneeda Bibi Naheed. <i>"The inter-annual variability in the onset of the enhanced chlorophyll-a east of Madagascar."</i> Thesis., University of Cape Town ,Faculty of Science ,Marine Research (MA-RE) Institute, 2015. http://hdl.handle.net/11427/15686en_ZA
dc.identifier.citationOozeeraully, Y. 2015. The inter-annual variability in the onset of the enhanced chlorophyll-a east of Madagascar. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Oozeeraully, Yuneeda Bibi Naheed AB - Chlorophyll-a concentration is a measure of phytoplankton biomass and is therefore used as a proxy for primary production. The chlorophyll bloom occurring in the South western Indian Ocean is one of the major blooms in the open ocean and is subject to controversies about its formation, propagation and termination mechanisms. In this study, the region was divided into two sub-regions, the South East region (48°E-66°E, 24°S-30°S) and the East region (70°E-88°E, 24°S-30°S) and satellite datasets of chlorophyll-a, sea surface temperature, wind speed and direction and sea surface height were analysed. A bloom was characterized by twice the mean level of the sub-region (~0.08mg/m3) and three bloom years were identified: 2004, 2006 and 2008. The timing, propagation and termination of the bloom showed spatial and temporal variability. The wavelet analysis revealed a semi-annual signal for 2006 and 2008 and an annual one in 2004 due to the gradual decline in the concentration of chlorophyll-a. The transport of the bloom is affected by the passage of eddies where the concentration of chlorophyll-a is higher in the core and around the edges in cyclonic and anticyclonic eddies respectively. The bloom could be present at the sub-surface level throughout the years but is only apparent at the surface during specific years. DA - 2015 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - The inter-annual variability in the onset of the enhanced chlorophyll-a east of Madagascar TI - The inter-annual variability in the onset of the enhanced chlorophyll-a east of Madagascar UR - http://hdl.handle.net/11427/15686 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/15686
dc.identifier.vancouvercitationOozeeraully YBN. The inter-annual variability in the onset of the enhanced chlorophyll-a east of Madagascar. [Thesis]. University of Cape Town ,Faculty of Science ,Marine Research (MA-RE) Institute, 2015 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/15686en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentMarine Research (MA-RE) Instituteen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherApplied Marine Scienceen_ZA
dc.titleThe inter-annual variability in the onset of the enhanced chlorophyll-a east of Madagascaren_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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