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dc.contributor.authorCheng, Lin
dc.date.accessioned2018-08-28T14:34:24Z
dc.date.available2018-08-28T14:34:24Z
dc.identifier.urihttp://hdl.handle.net/10222/74158
dc.description.abstractI developed and optimized a Cavity Ring-Down Spectroscopy based method for simultaneous determination of dissolved inorganic carbon concentration ([DIC]) and its stable carbon isotope composition (δ13C-DIC) in seawater. The new method was tested on the research vessel Celtic Explorer during an occupation of the Go-Ship A02 trans-Atlantic hydrographic section in 2017. The precision and accuracy for [DIC] determinations achieved ±3 μmol/kg. Precision of δ13C-DIC determination was better than ±0.12‰. Using deep seawater samples (DSW) collected during the cruise and a DIC Reference Material (RM), I organized a worldwide inter comparison experiment for the measurement of δ13C-DIC in seawater samples. Results from 16 participating groups showed excellent agreement (1σ of 0.11‰ and 0.10‰ for RM and DSW respectively). A normalization procedure increased the inter-laboratory precision of the DSW’ δ13C-DIC even further (1σ of 0.05‰). I also give a very brief overview of the δ13C-DIC results from the cruise.en_US
dc.language.isoenen_US
dc.subjectDissolved Inorganic Carbonen_US
dc.subjectCavity Ring Down Spectroscopyen_US
dc.subjectStable Isotopesen_US
dc.subjectLaboratory Inter-comparisonen_US
dc.subjectCertified Reference Materialen_US
dc.titleA TRANSATLANTIC SECTION OF SHIPBOARD DIC CONCENTRATION AND δ13C-DIC MEASUREMENTS AND RESULTS FROM A WORLDWIDE INTER COMPARISON STUDYen_US
dc.date.defence2018-08-20
dc.contributor.departmentDepartment of Oceanographyen_US
dc.contributor.degreeMaster of Scienceen_US
dc.contributor.external-examinerDr. Owen Sherwooden_US
dc.contributor.graduate-coordinatorDr. Markus Kienasten_US
dc.contributor.thesis-readerDr. Wei-Jun Caien_US
dc.contributor.thesis-readerDr. Carolyn Buchwalden_US
dc.contributor.thesis-readerDr. Chris Algaren_US
dc.contributor.thesis-supervisorDr. Douglas Wallaceen_US
dc.contributor.ethics-approvalNot Applicableen_US
dc.contributor.manuscriptsYesen_US
dc.contributor.copyright-releaseYesen_US
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