The identification and tracking of Agulhas rings using satellite altimetry

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dc.contributor.authorTaunton-Clark, Johnen_ZA
dc.date.accessioned2016-08-24T12:59:52Z
dc.date.available2016-08-24T12:59:52Z
dc.date.issued1993en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractThe methods of analysing, interpreting and computing surf ace geostrophic currents from GEOSAT altimeter data are explained. These methods were implemented in an examination of GEOSAT altimeter data for the period 12 July 1988 to 13 May 1989 with application to the identification and tracking of Agulhas rings in the southeast Atlantic Ocean. A population of as many circulation features of as five anticyclonic (and cyclonic) annular form consistent with that reported for Agulhas rings was identified from the altimeter data. The positive identification of the same feature in subsequent repeat cycles was, however, difficult. The Verna ring was identified as it travelled approximately along the ground track of GEOSAT pass A 158. Its horizontal (approximately 200 km diameter) and vertical (>30 cm sea surface elevation) dimensions confirmed its identity as an Agulhas ring. The translation speed of the Verna ring along pass A 158 was determined as 6.8 cm·s⁻¹ consistent with the speeds reported in the literature. Surface geostrophic speeds calculated from the altimeter-derived sea surface slopes showed maximum anticyclonic speeds of nearly 40 cm·s⁻¹ toward the SW at the northern rim and 25 cm·s-1 toward the NE at the southern edge of the ring.en_ZA
dc.identifier.apacitationTaunton-Clark, J. (1993). <i>The identification and tracking of Agulhas rings using satellite altimetry</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Oceanography. Retrieved from http://hdl.handle.net/11427/21515en_ZA
dc.identifier.chicagocitationTaunton-Clark, John. <i>"The identification and tracking of Agulhas rings using satellite altimetry."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Oceanography, 1993. http://hdl.handle.net/11427/21515en_ZA
dc.identifier.citationTaunton-Clark, J. 1993. The identification and tracking of Agulhas rings using satellite altimetry. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Taunton-Clark, John AB - The methods of analysing, interpreting and computing surf ace geostrophic currents from GEOSAT altimeter data are explained. These methods were implemented in an examination of GEOSAT altimeter data for the period 12 July 1988 to 13 May 1989 with application to the identification and tracking of Agulhas rings in the southeast Atlantic Ocean. A population of as many circulation features of as five anticyclonic (and cyclonic) annular form consistent with that reported for Agulhas rings was identified from the altimeter data. The positive identification of the same feature in subsequent repeat cycles was, however, difficult. The Verna ring was identified as it travelled approximately along the ground track of GEOSAT pass A 158. Its horizontal (approximately 200 km diameter) and vertical (>30 cm sea surface elevation) dimensions confirmed its identity as an Agulhas ring. The translation speed of the Verna ring along pass A 158 was determined as 6.8 cm·s⁻¹ consistent with the speeds reported in the literature. Surface geostrophic speeds calculated from the altimeter-derived sea surface slopes showed maximum anticyclonic speeds of nearly 40 cm·s⁻¹ toward the SW at the northern rim and 25 cm·s-1 toward the NE at the southern edge of the ring. DA - 1993 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1993 T1 - The identification and tracking of Agulhas rings using satellite altimetry TI - The identification and tracking of Agulhas rings using satellite altimetry UR - http://hdl.handle.net/11427/21515 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21515
dc.identifier.vancouvercitationTaunton-Clark J. The identification and tracking of Agulhas rings using satellite altimetry. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Oceanography, 1993 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21515en_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.titleThe identification and tracking of Agulhas rings using satellite altimetryen_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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