Distribution and speciation of iron in the northeast subarctic Pacific
| dc.contributor.author | Chong, Marina | |
| dc.contributor.supervisor | Cullen, Jay T. | |
| dc.date.accessioned | 2009-11-09T22:05:46Z | |
| dc.date.available | 2009-11-09T22:05:46Z | |
| dc.date.copyright | 2006 | en |
| dc.date.issued | 2009-11-09T22:05:46Z | |
| dc.degree.department | School of Earth and Ocean Sciences | |
| dc.degree.level | Master of Science M.Sc. | en |
| dc.description.abstract | The marine chemistry of dissolved iron (Fe) was examined in two studies conducted off the coast of British Columbia in the northeast Pacific. Dissolved (<0.4 µm) Fe was measured along inshore-offshore transects across the continental shelf in Queen Charlotte Sound. A benthic layer of high Fe, enriched due to exchange with shelf sediments, was found to extend across the shelf-slope break into offshore waters. Advection of these shelf waters may be a significant source of Fe to the nearby Fe-poor region of the northeast Pacific. In this Fe-limited gyre, little is known about the chemical speciation and bioavailability of Fe. The fractionation of dissolved Fe into inorganic and organically bound species along Line P was established by competitive ligand equilibration coupled with cathodic stripping voltammetry (CLE-CSV), and the results confirm the presence of biogenic Fe-binding ligands at concentrations in excess of dissolved Fe with conditional stability constants between 8.3 x 1010 and 5.6 x 1012 for the Fe-ligand complexes. The temporal and spatial variations observed are consistent with either a biological source of the ligands or an atmospheric source where greatest deposition occurs during the summer when stratification of the upper water column is most pronounced. | en |
| dc.identifier.uri | http://hdl.handle.net/1828/1826 | |
| dc.language | English | eng |
| dc.language.iso | en | en |
| dc.rights | Available to the World Wide Web | en |
| dc.subject | Seawater | en |
| dc.subject | iron content | en |
| dc.subject | British Columbia | en |
| dc.subject | Queen Charlotte Sound | en |
| dc.subject | Chemical oceanography | en |
| dc.subject | Pacific Ocean | en |
| dc.subject.lcsh | UVic Subject Index::Sciences and Engineering::Earth and Ocean Sciences::Oceanography | en |
| dc.title | Distribution and speciation of iron in the northeast subarctic Pacific | en |
| dc.type | Thesis | en |