Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean

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dc.contributor.advisorSigman, Danielen_ZA
dc.contributor.advisorFawcett, Sarahen_ZA
dc.contributor.advisorThomalla, Sandyen_ZA
dc.contributor.advisorReason, Chrisen_ZA
dc.contributor.authorSmart, Sandien_ZA
dc.date.accessioned2014-11-05T03:58:05Z
dc.date.available2014-11-05T03:58:05Z
dc.date.issued2014en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractWe 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 Antarcticen_ZA
dc.identifier.apacitationSmart, S. (2014). <i>Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Oceanography. Retrieved from http://hdl.handle.net/11427/9208en_ZA
dc.identifier.chicagocitationSmart, Sandi. <i>"Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Oceanography, 2014. http://hdl.handle.net/11427/9208en_ZA
dc.identifier.citationSmart, S. 2014. Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Smart, Sandi AB - 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 DA - 2014 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2014 T1 - Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean TI - Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean UR - http://hdl.handle.net/11427/9208 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/9208
dc.identifier.vancouvercitationSmart S. Wintertime nitrate isotope dynamics in the Atlantic sector of the Southern Ocean. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Oceanography, 2014 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/9208en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Oceanographyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.titleWintertime nitrate isotope dynamics in the Atlantic sector of the Southern Oceanen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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