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dc.contributor.authorJohansson, Malin
dc.contributor.authorBrekke, Camilla
dc.contributor.authorSpreen, Gunnar
dc.contributor.authorKing, Jennifer A.
dc.date.accessioned2017-11-20T17:11:21Z
dc.date.available2017-11-20T17:11:21Z
dc.date.issued2017-11-02
dc.description.abstractWe examine an extensive synthetic aperture radar (SAR) data set from the Arctic Ocean spanning a time period from January to June 2015, with the aim of identifying multi-polarization parameters that can be used to accurately separate newly formed sea ice from the surroundings. Newly formed sea ice areas both provide favourable routing for ship traffic, and are key to Arctic climate science because they enable heat exchange between the ocean and the atmosphere. Our data set encompasses three different frequencies, X-, C- and L-band, at a range of incidence angles, and were acquired under different environmental conditions. Our results suggest that by combining the scattering entropy and the co-polarization ratio we can successfully separate the newly formed sea ice from open water and thicker sea ice within all three frequencies throughout the winter and spring season. We observe a high correlation between scattering entropy values calculated using quad-polarization Cand L-band data and scattering entropy values calculated using the same scenes reduced to the co-polarization channels (HH and VV). We therefore conclude that dual-polarization (HH and VV) X-band scenes can be directly used to complement quad-polarimetric C- and L-band scenes for studies of newly formed sea ice. To confine the quad-polarimetric data sets to their co-polarization channels one can ensure a higher signal-to-noise ratio. Incidence angles below 35° are needed to keep the signal-to-noise ratios sufficiently high for the scattering entropy and co-polarization ratio. Due to its lack of incidence angle dependency, the polarization difference can provide additional support in newly formed sea ice studies. The regular coverage of the Arctic Ocean with Cband SAR means that such scenes should to be included in any automatic monitoring, however, X- and L-band SAR can, based on their difference in penetration depth, provide additional information about newly formed sea ice types and surface structure.en_US
dc.descriptionSource at <a href=http://dx.doi.org/10.1016/j.rse.2017.10.032> http://dx.doi.org/10.1016/j.rse.2017.10.032 </a>en_US
dc.identifier.citationJohansson M, Brekke C, Spreen G, King JA. X-, C-, and L-band SAR signatures of newly formed sea ice in Arctic leads during winter and spring. Remote Sensing of Environment. 2017en_US
dc.identifier.cristinIDFRIDAID 1505745
dc.identifier.doi10.1016/j.rse.2017.10.032
dc.identifier.issn0034-4257
dc.identifier.issn1879-0704
dc.identifier.urihttps://hdl.handle.net/10037/11761
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalRemote Sensing of Environment
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/ROMFORSK/222681/NORWAY/Combined remote and in situ study of sea ice thickness and motion in the Fram Strait//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/NORRUSS/233896/NORWAY/Detection and Characterization of Anthropogenic Oil Pollution in the Barents Sea by Synthetic Aperture Radar//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFI/233896/NORWAY/Centre for Integrated Remote Sensing and Forecasting for Arctic Operations/CIRFA/en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452en_US
dc.titleX-, C-, and L-band SAR signatures of newly formed sea ice in Arctic leads during winter and springen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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