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dc.contributor.authorO'Sadnick, Megan
dc.contributor.authorIngham, Malcolm
dc.contributor.authorEicken, Hajo
dc.contributor.authorPettit, Erin
dc.date.accessioned2020-02-07T10:07:49Z
dc.date.available2020-02-07T10:07:49Z
dc.date.created2017-01-16T15:02:33Z
dc.date.issued2016
dc.identifier.citationThe Cryosphere. 2016, 10 (6), 2923-2940.
dc.identifier.issn1994-0416
dc.identifier.urihttp://hdl.handle.net/11250/2640249
dc.description.abstractThe seasonal evolution of sea-ice microstructure controls key ice properties, including those governing ocean– atmosphere heat and gas exchange, remote-sensing signatures, and the role of the ice cover as a habitat. Nondestructive in situ monitoring of sea-ice microstructure is of value for sea-ice research and operations but remains elusive to date. We examine the potential for the electric properties of sea ice, which is highly sensitive to the brine distribution within the ice, to serve as a proxy for microstructure and, hence, other ice transport properties. Throughout spring of 2013 and 2014, we measured complex dielectric permittivity in the range of 10 to 95 kHz in landfast ice off the coast of Barrow (Utqia˙gvik), Alaska. Temperature and salinity measurements and ice samples provide data to characterize ice microstructure in relation to these permittivity measurements. The results reveal a significant correlation between complex dielectric permittivity, brine volume fraction,and microstructural characteristics including pore volume and connectivity, derived from X-ray microtomography of core samples. The influence of temperature and salinity variations as well as the relationships between ice properties,microstructural characteristics, and dielectric behavior emerge from multivariate analysis of the combined data set. Our findings suggest some promise for low-frequency permittivity measurements to track seasonal evolution of a combination of mean pore volume, fractional connectivity, and pore surface area-to-volume ratio, which in turn may serve as proxies for key sea-ice transport properties.
dc.language.isoeng
dc.relation.urihttp://www.the-cryosphere.net/10/2923/2016/
dc.subjectSjøis
dc.subjectSea ice
dc.titleIn situ field measurements of the temporal evolution of low-frequency sea-ice dielectric properties in relation to temperature, salinity, and microstructure
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionpublishedVersion
dc.subject.nsiVDP::Teknologi: 500
dc.subject.nsiVDP::Technology: 500
dc.source.pagenumber2923-2940
dc.source.volume10
dc.source.journalThe Cryosphere
dc.source.issue6
dc.identifier.doi10.5194/tc-10-2923-2016
dc.identifier.cristin1428622
dc.relation.projectNorges forskningsråd: 243812
cristin.unitcode6228,0,0,0
cristin.unitnameNorthern Research Institute Narvik AS
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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