{"id":{"repo_id":"cape-town","oai_identifier":"oai:open.uct.ac.za:11427/41404"},"canonical_url":"https://search.dev.ndltd.org/etd/cape-town/oai:open.uct.ac.za:11427/41404","repository":{"repo_id":"cape-town","name":"University of Cape Town","base_url":"https://open.uct.ac.za/oai/request"},"display":{"title":"Characterization of a warm-cored agulhas ring travelling south of the subtropical front","abstract":"The south-eastern sector of the Atlantic Ocean near the South African coast is a region of high eddy activity in the form of Agulhas rings. These Agulhas rings play a vital role in the Inda-Atlantic inter-ocean exchange, and are critical for the global thermohaline circulation since these rings, spawned from the Agulhas retroflection, are typically of Indian Ocean origin. The pathway and behaviour of these Agulhas rings are affected by the underlying topography of the region with special reference to the Agulhas ridge and the Erica and Schmitt-Ott seamounts. This study investigates an Agulhas ring, which was identified during the Bonus-Goodhope cruise in February 2008. In addition to the hydrographic data obtained during this cruise, satellite data such as altimetry and Sea Surface Temperature (SST) are also employed to analyse and determine the origins of the feature, its development and lifespan. The majority of Agulhas rings remain within the Subtropical domain, however during the 2008 Goodhope cruise a positive anomaly was observed south of the Subtropical Front in the Subantarctic zone. Studying these features which drift into the Subantarctic domain may be important in understanding the global heat and salt budget since these Agulhas rings have positive heat and salt anomalies with respect to the surrounding region. Overall, it can be concluded that the Subantarctic zone had a major impact on the core properties of the ring such as its mixed layer depth and that the underlying topography such as the Agulhas ridge had a major effect on the behaviour and life span of the ring.","abstract_html":"The south-eastern sector of the Atlantic Ocean near the South African coast is a region of high eddy activity in the form of Agulhas rings. These Agulhas rings play a vital role in the Inda-Atlantic inter-ocean exchange, and are critical for the global thermohaline circulation since these rings, spawned from the Agulhas retroflection, are typically of Indian Ocean origin. The pathway and behaviour of these Agulhas rings are affected by the underlying topography of the region with special reference to the Agulhas ridge and the Erica and Schmitt-Ott seamounts. This study investigates an Agulhas ring, which was identified during the Bonus-Goodhope cruise in February 2008. In addition to the hydrographic data obtained during this cruise, satellite data such as altimetry and Sea Surface Temperature (SST) are also employed to analyse and determine the origins of the feature, its development and lifespan. The majority of Agulhas rings remain within the Subtropical domain, however during the 2008 Goodhope cruise a positive anomaly was observed south of the Subtropical Front in the Subantarctic zone. Studying these features which drift into the Subantarctic domain may be important in understanding the global heat and salt budget since these Agulhas rings have positive heat and salt anomalies with respect to the surrounding region. Overall, it can be concluded that the Subantarctic zone had a major impact on the core properties of the ring such as its mixed layer depth and that the underlying topography such as the Agulhas ridge had a major effect on the behaviour and life span of the ring.","abstract_has_math":false,"creators":["Vianello, Patrick"],"institution":"Department of Oceanography","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Ansorge, Isabelle","Swart, Sebastiaan"],"committee_chairs":[],"committee_members":[],"year":2010,"date_issued":"2010","date_published":"2010","updated_at":"2026-07-22T22:23:22Z","subjects":["Oceanography"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11427/41404","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Ansorge, Isabelle","Swart, Sebastiaan"]},{"key":"dc:creator","label":"Author","values":["Vianello, Patrick"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-05-02T12:00:07Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2025-05-02T12:00:07Z"]},{"key":"dc:date.issued","label":"Date","values":["2010"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Department of Oceanography"]},{"key":"dc:type","label":"Dc Type","values":["Thesis / Dissertation"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Masters","MSc"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Oceanography"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11427/41404"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The south-eastern sector of the Atlantic Ocean near the South African coast is a region of high eddy activity in the form of Agulhas rings. These Agulhas rings play a vital role in the Inda-Atlantic inter-ocean exchange, and are critical for the global thermohaline circulation since these rings, spawned from the Agulhas retroflection, are typically of Indian Ocean origin. The pathway and behaviour of these Agulhas rings are affected by the underlying topography of the region with special reference to the Agulhas ridge and the Erica and Schmitt-Ott seamounts. This study investigates an Agulhas ring, which was identified during the Bonus-Goodhope cruise in February 2008. In addition to the hydrographic data obtained during this cruise, satellite data such as altimetry and Sea Surface Temperature (SST) are also employed to analyse and determine the origins of the feature, its development and lifespan. The majority of Agulhas rings remain within the Subtropical domain, however during the 2008 Goodhope cruise a positive anomaly was observed south of the Subtropical Front in the Subantarctic zone. Studying these features which drift into the Subantarctic domain may be important in understanding the global heat and salt budget since these Agulhas rings have positive heat and salt anomalies with respect to the surrounding region. Overall, it can be concluded that the Subantarctic zone had a major impact on the core properties of the ring such as its mixed layer depth and that the underlying topography such as the Agulhas ridge had a major effect on the behaviour and life span of the ring."]},{"key":"dc:title","label":"Title","values":["Characterization of a warm-cored agulhas ring travelling south of the subtropical front"]}]}],"canonical_facts":{"dc:contributor.advisor":["Ansorge, Isabelle","Swart, Sebastiaan"],"dc:creator":["Vianello, Patrick"],"dc:date.accessioned":["2025-05-02T12:00:07Z"],"dc:date.available":["2025-05-02T12:00:07Z"],"dc:date.issued":["2010"],"dc:description.abstract":["The south-eastern sector of the Atlantic Ocean near the South African coast is a region of high eddy activity in the form of Agulhas rings. These Agulhas rings play a vital role in the Inda-Atlantic inter-ocean exchange, and are critical for the global thermohaline circulation since these rings, spawned from the Agulhas retroflection, are typically of Indian Ocean origin. The pathway and behaviour of these Agulhas rings are affected by the underlying topography of the region with special reference to the Agulhas ridge and the Erica and Schmitt-Ott seamounts. This study investigates an Agulhas ring, which was identified during the Bonus-Goodhope cruise in February 2008. In addition to the hydrographic data obtained during this cruise, satellite data such as altimetry and Sea Surface Temperature (SST) are also employed to analyse and determine the origins of the feature, its development and lifespan. The majority of Agulhas rings remain within the Subtropical domain, however during the 2008 Goodhope cruise a positive anomaly was observed south of the Subtropical Front in the Subantarctic zone. Studying these features which drift into the Subantarctic domain may be important in understanding the global heat and salt budget since these Agulhas rings have positive heat and salt anomalies with respect to the surrounding region. Overall, it can be concluded that the Subantarctic zone had a major impact on the core properties of the ring such as its mixed layer depth and that the underlying topography such as the Agulhas ridge had a major effect on the behaviour and life span of the ring."],"dc:identifier.uri":["http://hdl.handle.net/11427/41404"],"dc:language.iso":["en"],"dc:publisher.department":["Department of Oceanography"],"dc:subject":["Oceanography"],"dc:title":["Characterization of a warm-cored agulhas ring travelling south of the subtropical front"],"dc:type":["Thesis / Dissertation"],"dc:type.qualificationlevel":["Masters","MSc"]},"updated_at":"2026-07-22T22:23:22Z"}