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Dynamics and variability of the Subantarctic mixed-layer as determined from a high resolution glider dataset
Traditional understanding of mixed-layer (ML) dynamics in the African sector of the Southern Ocean suggests that seasonal summer stratification and subsequent reduction in ML depth (MLD) is determined by the onset of a positive net heat ux. The impact of physical forcing mechanisms on the intra-seas...
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| Format: | Thesis |
| Language: | English |
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Department of Oceanography
2015
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| _version_ | 1867613534943182849 |
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| access_status_str | Open Access |
| author | Du Plessis, Marcel David |
| author2 | Ansorge, Isabelle Jane |
| author_browse | Ansorge, Isabelle Jane Du Plessis, Marcel David |
| author_facet | Ansorge, Isabelle Jane Du Plessis, Marcel David |
| author_sort | Du Plessis, Marcel David |
| collection | Thesis |
| description | Traditional understanding of mixed-layer (ML) dynamics in the African sector of the Southern Ocean suggests that seasonal summer stratification and subsequent reduction in ML depth (MLD) is determined by the onset of a positive net heat ux. The impact of physical forcing mechanisms on the intra-seasonal variability of the ML is still relatively unknown. Recent research in the North Atlantic has highlighted the role that sub-mesoscale ML eddy dynamics has on ML stratification. It is now understood that large horizontal density gradients drive sub-mesoscale eddy formation which have been shown to result in the early onset of spring phytoplankton blooms at high latitudes. To date these ML eddies have been researched primarily in models with few observational studies available. To test the ML eddy hypothesis in the Subantarctic Zone (SAZ) we use high-resolution (~3km, 4-hourly) glider measurements between austral spring to late summer. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/15496 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:37:41.248Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | Department of Oceanography |
| publisherStr | Department of Oceanography |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/15496 Dynamics and variability of the Subantarctic mixed-layer as determined from a high resolution glider dataset Du Plessis, Marcel David Ansorge, Isabelle Jane Jackson-Veitch, Jennifer Swart, Sebastiaan Mahadevan, Amala Oceanography Traditional understanding of mixed-layer (ML) dynamics in the African sector of the Southern Ocean suggests that seasonal summer stratification and subsequent reduction in ML depth (MLD) is determined by the onset of a positive net heat ux. The impact of physical forcing mechanisms on the intra-seasonal variability of the ML is still relatively unknown. Recent research in the North Atlantic has highlighted the role that sub-mesoscale ML eddy dynamics has on ML stratification. It is now understood that large horizontal density gradients drive sub-mesoscale eddy formation which have been shown to result in the early onset of spring phytoplankton blooms at high latitudes. To date these ML eddies have been researched primarily in models with few observational studies available. To test the ML eddy hypothesis in the Subantarctic Zone (SAZ) we use high-resolution (~3km, 4-hourly) glider measurements between austral spring to late summer. 2015-12-01T09:25:42Z 2015-12-01T09:25:42Z 2015 Master Thesis Masters MSc http://hdl.handle.net/11427/15496 eng application/pdf Department of Oceanography Faculty of Science University of Cape Town |
| spellingShingle | Oceanography Du Plessis, Marcel David Dynamics and variability of the Subantarctic mixed-layer as determined from a high resolution glider dataset |
| thesis_degree_str | Master's |
| title | Dynamics and variability of the Subantarctic mixed-layer as determined from a high resolution glider dataset |
| title_full | Dynamics and variability of the Subantarctic mixed-layer as determined from a high resolution glider dataset |
| title_fullStr | Dynamics and variability of the Subantarctic mixed-layer as determined from a high resolution glider dataset |
| title_full_unstemmed | Dynamics and variability of the Subantarctic mixed-layer as determined from a high resolution glider dataset |
| title_short | Dynamics and variability of the Subantarctic mixed-layer as determined from a high resolution glider dataset |
| title_sort | dynamics and variability of the subantarctic mixed layer as determined from a high resolution glider dataset |
| topic | Oceanography |
| url | http://hdl.handle.net/11427/15496 |
| work_keys_str_mv | AT duplessismarceldavid dynamicsandvariabilityofthesubantarcticmixedlayerasdeterminedfromahighresolutiongliderdataset |