Low frequency variabilty of the Agulhas Current region in a numerical model

Simple item page
dc.contributor.authordu Plessis, Kirsten Annetteen_ZA
dc.date.accessioned2014-08-15T14:22:05Z
dc.date.available2014-08-15T14:22:05Z
dc.date.issued2013
dc.description.abstractThe Agulhas region is known to be of global importance due to its role in the Global Meridional Overturning Circulation (GMOC) and regionally it can influence rainfall patterns and severe weather events. The long-term variability of the Agulhas region was analysed in relation to temperature, sea surface height (SSH) and velocity within the current using output from a regional ocean model. Validation of the model with in situ and satellite observed values for the temperature and SSH showed the modelled SSH results to be only marginally different from the satellite observed, while the temperature validation showed the modelled results to be over-estimating temperature across the region. Relatively weak trends existed in temperature and SSH for some parts of the Agulhas Current, most notably the retroflection region. There were also periods such as the 1960s and 1990s which were anomalously warm whereas the 1950s and 2000s were relatively cool. Analyses of these periods in terms of atmospheric changes throughout the Southern Hemisphere revealed some connections with El Niño - Southern Oscillation (ENSO), the Southern Annular Mode (SAM) and shifts in the wavenumber 3 or 4 pattern in the mid-latitude atmosphereen_ZA
dc.identifier.apacitationdu Plessis, K. A. (2013). <i>Low frequency variabilty of the Agulhas Current region in a numerical model</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Oceanography. Retrieved from http://hdl.handle.net/11427/6584en_ZA
dc.identifier.chicagocitationdu Plessis, Kirsten Annette. <i>"Low frequency variabilty of the Agulhas Current region in a numerical model."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Oceanography, 2013. http://hdl.handle.net/11427/6584en_ZA
dc.identifier.citationdu Plessis, K. 2013. Low frequency variabilty of the Agulhas Current region in a numerical model. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - du Plessis, Kirsten Annette AB - The Agulhas region is known to be of global importance due to its role in the Global Meridional Overturning Circulation (GMOC) and regionally it can influence rainfall patterns and severe weather events. The long-term variability of the Agulhas region was analysed in relation to temperature, sea surface height (SSH) and velocity within the current using output from a regional ocean model. Validation of the model with in situ and satellite observed values for the temperature and SSH showed the modelled SSH results to be only marginally different from the satellite observed, while the temperature validation showed the modelled results to be over-estimating temperature across the region. Relatively weak trends existed in temperature and SSH for some parts of the Agulhas Current, most notably the retroflection region. There were also periods such as the 1960s and 1990s which were anomalously warm whereas the 1950s and 2000s were relatively cool. Analyses of these periods in terms of atmospheric changes throughout the Southern Hemisphere revealed some connections with El Niño - Southern Oscillation (ENSO), the Southern Annular Mode (SAM) and shifts in the wavenumber 3 or 4 pattern in the mid-latitude atmosphere DA - 2013 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2013 T1 - Low frequency variabilty of the Agulhas Current region in a numerical model TI - Low frequency variabilty of the Agulhas Current region in a numerical model UR - http://hdl.handle.net/11427/6584 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/6584
dc.identifier.vancouvercitationdu Plessis KA. Low frequency variabilty of the Agulhas Current region in a numerical model. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Oceanography, 2013 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/6584en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Oceanographyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.titleLow frequency variabilty of the Agulhas Current region in a numerical modelen_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
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_sci_duplessis_ka.pdf
Size:
5.6 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters