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An investigation into the relative contributions of ENSO, Benguela Niño and the sub-tropical Indian Ocean dipole on summer rainfall over southern Africa
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Oceanography
2014
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| _version_ | 1867613174896787456 |
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| access_status_str | Open Access |
| author | Mpheshea, Lerato Elizabeth |
| author2 | Reason, Chris |
| author_browse | Mpheshea, Lerato Elizabeth Reason, Chris |
| author_facet | Reason, Chris Mpheshea, Lerato Elizabeth |
| author_sort | Mpheshea, Lerato Elizabeth |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/9211 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:56.645Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| 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:11427/9211 An investigation into the relative contributions of ENSO, Benguela Niño and the sub-tropical Indian Ocean dipole on summer rainfall over southern Africa Mpheshea, Lerato Elizabeth Reason, Chris Includes bibliographical references. The region below the 5ᵒS latitude is defined here as southern Africa. This region is subject to high inter-annual rainfall variability attributed to the local and remote SST fluctuations. The main purpose of this study is to investigate the unique impact that SST conditions related to ENSO, Benguela Niño and subtropical Indian Ocean Dipole (SIOD) has on summer rainfall over southern Africa. To achieve this, a partial correlation method was employed to analyse the possible relationship between rainfall variability and interannual SST variability in the Niño3.4 index, Angola-Benguela front and SIOD index for the climatological period between 1950 and 2010. The results revealed ENSO as a prime mode of rainfall variability in southern Africa. The ENSO-rainfall relationship in the central region of southern Africa tends to be modulated by the Benguela Niño and SIOD signal. In the west coast region of Namibia and Angola, the Benguela Niño was found to be strongly linked to rainfall variability. However, this Benguela Niño-rainfall relationship tends to weaken when the effect of ENSO and SIOD is removed. The SIOD impact on the rainfall was found to be dependent on ENSO. 2014-11-05T03:58:12Z 2014-11-05T03:58:12Z 2014 Master Thesis Masters MSc http://hdl.handle.net/11427/9211 eng application/pdf Department of Oceanography Faculty of Science University of Cape Town |
| spellingShingle | Mpheshea, Lerato Elizabeth An investigation into the relative contributions of ENSO, Benguela Niño and the sub-tropical Indian Ocean dipole on summer rainfall over southern Africa |
| thesis_degree_str | Master's |
| title | An investigation into the relative contributions of ENSO, Benguela Niño and the sub-tropical Indian Ocean dipole on summer rainfall over southern Africa |
| title_full | An investigation into the relative contributions of ENSO, Benguela Niño and the sub-tropical Indian Ocean dipole on summer rainfall over southern Africa |
| title_fullStr | An investigation into the relative contributions of ENSO, Benguela Niño and the sub-tropical Indian Ocean dipole on summer rainfall over southern Africa |
| title_full_unstemmed | An investigation into the relative contributions of ENSO, Benguela Niño and the sub-tropical Indian Ocean dipole on summer rainfall over southern Africa |
| title_short | An investigation into the relative contributions of ENSO, Benguela Niño and the sub-tropical Indian Ocean dipole on summer rainfall over southern Africa |
| title_sort | investigation into the relative contributions of enso benguela nino and the sub tropical indian ocean dipole on summer rainfall over southern africa |
| url | http://hdl.handle.net/11427/9211 |
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