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dc.contributor.authorBolt, Channing
dc.date.accessioned2021-11-27T23:28:14Z
dc.date.available2021-11-27T23:28:14Z
dc.date.issued2021-05
dc.identifier.urihttp://hdl.handle.net/11122/12538
dc.descriptionDissertation (Ph.D.) University of Alaska Fairbanks, 2021en_US
dc.description.abstractThe Arctic Ocean is a dynamic region undergoing rapid change. Sea ice and meteoric water are intrinsic components of the Arctic environment that play key roles in its ecosystem, including the distributions and cycling of trace elements throughout the pan-Arctic Ocean. Meteoric water (e.g., rivers and snow deposition) contributes to the input of trace elements to surface waters, while sea ice dynamics contribute to the transport of these constituents across Arctic basins. Trace element distributions can provide insights into Arctic processes. The focus of Chapter One is on particulate (>0.2 μm) trace elements in Arctic pack ice, associated snow, and underlying surface waters collected from September-October 2015 during the US GEOTRACES Western Arctic cruise (GN01). This late-season pack ice provides a snapshot of sea ice characteristics in regions near the North Pole, within the Makarov and Canada Basins, and can estimate the impact melting sea ice may have on particulate trace element inputs to Arctic waters. Chapter Two presents on the utility of dissolved barium (dBa), a bio-intermediate element of lithogenic origin, as a tracer of meteoric water throughout the Siberian Arctic Ocean. Samples for Chapter Two were collected during the 2018 Nansen and Amundsen Basin Observatory System. The distribution of dBa in this region may provide useful insights into important shelf processes, such as tracing shelf waters along continental slopes. In Chapter 3, additional spatiotemporal geochemical parameters (δ¹⁸O and salinity) are considered alongside dBa to model how Arctic water mass fractions (meteoric, sea ice melt, and Atlantic waters) changed between 2013, 2015, and 2018 within the Siberian Arctic Ocean. This dissertation contributes to the understanding of Arctic Ocean processes through the application of trace element studies and highlights the usefulness of combining tracers to better understand this dynamic environment.en_US
dc.description.sponsorshipNABOS, GEOTRACES, Office of Naval Research SMART scholarshipen_US
dc.language.isoen_USen_US
dc.subjectArctic Oceanen_US
dc.subjectSea iceen_US
dc.subjectPrecipitationen_US
dc.subjectFresh wateren_US
dc.subjectMeltwateren_US
dc.subject.otherDoctor of Philosophy in Oceanographyen_US
dc.titleUtility of trace element studies for improving our understanding of geochemical processes within the arctic ocean environmenten_US
dc.typeDissertationen_US
dc.type.degreephden_US
dc.identifier.departmentDepartment of Oceanographyen_US
dc.contributor.chairAguilar-Islas, Ana
dc.contributor.committeeRember, Robert
dc.contributor.committeeReynolds, Jennifer
dc.contributor.committeeRivera-Duarte, Ignacio
dc.contributor.committeeSimmons, Harper
refterms.dateFOA2021-11-27T23:28:15Z


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