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Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern 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_ | 1867614007104372736 |
|---|---|
| access_status_str | Open Access |
| author | Smart, Sandi |
| author2 | Sigman, Daniel |
| author_browse | Sigman, Daniel Smart, Sandi |
| author_facet | Sigman, Daniel Smart, Sandi |
| author_sort | Smart, Sandi |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/9208 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:45:11.536Z |
| 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:11427/9208 Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean Smart, Sandi Sigman, Daniel Fawcett, Sarah Thomalla, Sandy Reason, Chris Includes bibliographical references. We provide the first data on wintertime patterns of the nitrogen (N) and oxygen (O) isotopes of seawater nitrate for the region south of Africa. Water column profile and underway surface samples collected in July 2012 span a range of latitudes from the subtropics to 57.8°S, just beyond the Antarctic winter sea-ice edge (56.7°S). The data are used in the context of simple models of nitrate consumption (including the Rayleigh model) to estimate the isotope effect (the degree of isotope discrimination) associated with the assimilation of nitrate by phytoplankton. We focus on the Antarctic region (south of 50.3°S), where application of the Rayleigh model to depth profile N isotope data yields considerably lower isotope effect estimates (1.6-3.3‰) than commonly observed in the summertime Antarctic 2014-11-05T03:58:05Z 2014-11-05T03:58:05Z 2014 Master Thesis Masters MSc http://hdl.handle.net/11427/9208 eng application/pdf Department of Oceanography Faculty of Science University of Cape Town |
| spellingShingle | Smart, Sandi Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean |
| thesis_degree_str | Master's |
| title | Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean |
| title_full | Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean |
| title_fullStr | Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean |
| title_full_unstemmed | Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean |
| title_short | Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean |
| title_sort | wintertime nitrate isotope dynamics in the atlantic sector of the southern ocean |
| url | http://hdl.handle.net/11427/9208 |
| work_keys_str_mv | AT smartsandi wintertimenitrateisotopedynamicsintheatlanticsectorofthesouthernocean |