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dc.contributor.authorGriebel, Jakob
dc.contributor.authorDierking, Wolfgang Fritz Otto
dc.date.accessioned2018-04-23T17:02:22Z
dc.date.available2018-04-23T17:02:22Z
dc.date.issued2017-07-12
dc.description.abstractRetrievals of sea ice drift from synthetic aperture radar (SAR) images at high spatial resolution are valuable for understanding kinematic behavior and deformation processes of the ice at different spatial scales. Ice deformation causes temporal changes in patterns observed in sequences of SAR images; which makes it difficult to retrieve ice displacement with algorithms based on correlation and feature identification techniques. Here, we propose two extensions to a pattern matching algorithm, with the objective to improve the reliability of the retrieved sea ice drift field at spatial resolutions of a few hundred meters. Firstly, we extended a reliability assessment proposed in an earlier study, which is based on analyzing texture and correlation parameters of SAR image pairs, with the aim to reject unreliable pattern matches. The second step is specifically adapted to the presence of deformation features to avoid the erasing of discontinuities in the drift field. We suggest an adapted detection scheme that identifies linear deformation features (LDFs) in the drift vector field, and detects and replaces outliers after considering the presence of such LDFs in their neighborhood. We validate the improvement of our pattern matching algorithm by comparing the automatically retrieved drift to manually derived reference data for three SAR scenes acquired over different sea ice covered regions.en_US
dc.description.sponsorshipThe Helmholtz Alliance ‘Remote Sensing and Earth System Dynamics, WP-C5en_US
dc.descriptionSource at: <a href=http://doi.org/10.3390/rs9070718> http://doi.org/10.3390/rs9070718 </a>en_US
dc.identifier.citationGriebel, J. & Dierking, W. F. O. (2017). A method to improve high-resolution sea ice drift retrievals in the presence of deformation zones. Remote Sensing, 9(7), 1-16. http://doi.org/10.3390/rs907071en_US
dc.identifier.cristinIDFRIDAID 1532381
dc.identifier.doi10.3390/rs9070718
dc.identifier.issn2072-4292
dc.identifier.urihttps://hdl.handle.net/10037/12576
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.relation.journalRemote Sensing
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.titleA method to improve high-resolution sea ice drift retrievals in the presence of deformation zonesen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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