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dc.contributor.authorGriebel, Jakob
dc.contributor.authorDierking, Wolfgang Fritz Otto
dc.date.accessioned2019-02-12T14:22:25Z
dc.date.available2019-02-12T14:22:25Z
dc.date.issued2018-03-03
dc.description.abstractWe studied two issues to be considered in the calculation of parameters characterizing sea ice deformation: the effect of uncertainties in an automatically retrieved sea ice drift field, and the influence of the type of drift vector grid. Sea ice deformation changes the local ice mass balance and the interaction between atmosphere, ice, and ocean, and constitutes a hazard to marine traffic and operations. Due to numerical effects, the results of deformation retrievals may predict, e.g., openings and closings of the ice cover that do not exist in reality. We focus specifically on fields of ice drift obtained from synthetic aperture radar (SAR) imagery and analyze the Propagated Drift Retrieval Error (PDRE) and the Boundary Definition Error (BDE). From the theory of error propagation, the PDRE for the calculated deformation parameters can be estimated. To quantify the BDE, we devise five different grid types and compare theoretical expectation and numerical results for different deformation parameters assuming three scenarios: pure divergence, pure shear, and a mixture of both. Our findings for both sources of error help to set up optimal deformation retrieval schemes and are also useful for other applications working with vector fields and scalar parameters derived therefrom.en_US
dc.description.sponsorshipThe Helmholtz Allianceen_US
dc.descriptionSource at <a href=https://doi.org/10.3390/rs10030393> https://doi.org/10.3390/rs10030393</a>.en_US
dc.identifier.citationGriebel, J. & Dierking, W.F.O. (2018). Impact of sea ice drift retrieval errors, discretization and grid type on calculations of ice deformation. <i>Remote Sensing, 10</i>(3). https://doi.org/10.3390/rs10030393en_US
dc.identifier.cristinIDFRIDAID 1622015
dc.identifier.doi10.3390/rs10030393
dc.identifier.issn2072-4292
dc.identifier.urihttps://hdl.handle.net/10037/14681
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.relation.journalRemote Sensing
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430en_US
dc.subjectsea iceen_US
dc.subjectdeformationen_US
dc.subjectdriften_US
dc.subjectSARen_US
dc.subjectuncertaintiesen_US
dc.subjecterror analysisen_US
dc.titleImpact of sea ice drift retrieval errors, discretization and grid type on calculations of ice deformationen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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