Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Particulate organic carbon and mineral export from the North and South Atlantic gyres : the 234Th/238U disequilibrium approach.
Includes bibliographical references (leaves 228-270).
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Oceanography
2014
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613278603051008 |
|---|---|
| access_status_str | Open Access |
| author | Thomalla, S J |
| author2 | Lucas, Mike |
| author_browse | Lucas, Mike Thomalla, S J |
| author_facet | Lucas, Mike Thomalla, S J |
| author_sort | Thomalla, S J |
| collection | Thesis |
| description | Includes bibliographical references (leaves 228-270). |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/6452 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:35.758Z |
| 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:11427/6452 Particulate organic carbon and mineral export from the North and South Atlantic gyres : the 234Th/238U disequilibrium approach. Thomalla, S J Lucas, Mike Turnewitsch, Robert Oceanography Includes bibliographical references (leaves 228-270). Subtropical ocean gyres are typically characterised by low carbon export into the deep ocean. However, due to their large area, even relatively small average carbon export may be globally significant. Strong correlations observed between deep-sea organic carbon, calcite and opal suggest that mineral phases may enhance the export and survival of organic matter as it sinks (the 'ballast effect'). However, the processes underlying these correlations are not well understood and remain key uncertainties in models that predict global carbon cycling. To better constrain carbon and mineral export from the surface ocean of subtropical gyres, radioactive disequilibria between 234Th and 238U were used to estimate fluxes of particulate organic carbon (POe), calcite and opal in the North and South Atlantic subtropical gyres. 2014-08-13T19:44:48Z 2014-08-13T19:44:48Z 2007 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/6452 eng application/pdf Department of Oceanography Faculty of Science University of Cape Town |
| spellingShingle | Oceanography Thomalla, S J Particulate organic carbon and mineral export from the North and South Atlantic gyres : the 234Th/238U disequilibrium approach. |
| thesis_degree_str | Doctoral |
| title | Particulate organic carbon and mineral export from the North and South Atlantic gyres : the 234Th/238U disequilibrium approach. |
| title_full | Particulate organic carbon and mineral export from the North and South Atlantic gyres : the 234Th/238U disequilibrium approach. |
| title_fullStr | Particulate organic carbon and mineral export from the North and South Atlantic gyres : the 234Th/238U disequilibrium approach. |
| title_full_unstemmed | Particulate organic carbon and mineral export from the North and South Atlantic gyres : the 234Th/238U disequilibrium approach. |
| title_short | Particulate organic carbon and mineral export from the North and South Atlantic gyres : the 234Th/238U disequilibrium approach. |
| title_sort | particulate organic carbon and mineral export from the north and south atlantic gyres the 234th 238u disequilibrium approach |
| topic | Oceanography |
| url | http://hdl.handle.net/11427/6452 |
| work_keys_str_mv | AT thomallasj particulateorganiccarbonandmineralexportfromthenorthandsouthatlanticgyresthe234th238udisequilibriumapproach |