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Historical climate variability reconstructed from massive coral records in the western Indian Ocean
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_ | 1867613950144675840 |
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| access_status_str | Open Access |
| author | Nicolas, Jean Vincent Arnaud |
| author2 | Reason, Chris |
| author_browse | Nicolas, Jean Vincent Arnaud Reason, Chris |
| author_facet | Reason, Chris Nicolas, Jean Vincent Arnaud |
| author_sort | Nicolas, Jean Vincent Arnaud |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/9811 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:44:17.215Z |
| 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:11427/9811 Historical climate variability reconstructed from massive coral records in the western Indian Ocean Nicolas, Jean Vincent Arnaud Reason, Chris Zinke, Jens Applied Marine Science Includes bibliographical references. Coral δ¹⁸O and Sr/Ca records from massive corals in the western Indian Ocean (WIO) are used to establish the heterogeneous distribution of warming rates across the tropical and subtropical regions and to investigate if it corresponds with that from instrumental sea surface temperatures (SSTs). The coral records correlate with instrumental data better on monthly time scales compared to annual time scales. Coral thermal stress was assessed by the Degree Heating Months (DHM) technique and even though the coral DHM aligns quite well with instrumental DHM, the values from coral data are generally 2-3 times greater in magnitude than the DHM values from instrumental data. It was found that the accumulated thermal stress, calculated from coral and instrumental data, for the majority of the tropical and subtropical WIO sites has been increasing since the 1970’s. From 1870 to 1995, both the tropics and the subtropics have been warming in general, although with different and varying rates as recorded by the coral and the instrumental SSTs. It was further revealed that both the tropical and the subtropical WIO warmed during the summer and winter periods during 1870-1995. On longer time scales, the relationship between the coral records in the WIO and climate indices showed a significant interannual variability approximately centered at periods 3-6 years, indicating a probable link with ENSO and IOD. The extent to which coral reefs from different sites in the WIO are prepared to survive climate change based on historical SST variability and intensity of warming rates are described. It could therefore be suggested that some corals may be more favoured to survive warming climate compared to others because corals in the WIO are located in different oceanographic conditions and experience different climatic variations. 2014-11-28T09:55:13Z 2014-11-28T09:55:13Z 2012 Master Thesis Masters MSc http://hdl.handle.net/11427/9811 eng application/pdf Department of Oceanography Faculty of Science University of Cape Town |
| spellingShingle | Applied Marine Science Nicolas, Jean Vincent Arnaud Historical climate variability reconstructed from massive coral records in the western Indian Ocean |
| thesis_degree_str | Master's |
| title | Historical climate variability reconstructed from massive coral records in the western Indian Ocean |
| title_full | Historical climate variability reconstructed from massive coral records in the western Indian Ocean |
| title_fullStr | Historical climate variability reconstructed from massive coral records in the western Indian Ocean |
| title_full_unstemmed | Historical climate variability reconstructed from massive coral records in the western Indian Ocean |
| title_short | Historical climate variability reconstructed from massive coral records in the western Indian Ocean |
| title_sort | historical climate variability reconstructed from massive coral records in the western indian ocean |
| topic | Applied Marine Science |
| url | http://hdl.handle.net/11427/9811 |
| work_keys_str_mv | AT nicolasjeanvincentarnaud historicalclimatevariabilityreconstructedfrommassivecoralrecordsinthewesternindianocean |