An optimization framework to improve 4D-Var data assimilation system performance

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dc.contributor.authorCioaca, Alexandruen
dc.contributor.authorSandu, Adrianen
dc.contributor.departmentComputer Scienceen
dc.date.accessioned2017-03-06T18:38:38Zen
dc.date.available2017-03-06T18:38:38Zen
dc.date.issued2014-10-15en
dc.description.abstractThis paper develops a computational framework for optimizing the parameters of data assimilation systems in order to improve their performance. The approach formulates a continuous meta-optimization problem for parameters; the meta-optimization is constrained by the original data assimilation problem. The numerical solution process employs adjoint models and iterative solvers. The proposed framework is applied to optimize observation values, data weighting coefficients, and the location of sensors for a test problem. The ability to optimize a distributed measurement network is crucial for cutting down operating costs and detecting malfunctions.en
dc.description.versionPublished versionen
dc.format.extent377 - 389 (13) page(s)en
dc.identifier.doihttps://doi.org/10.1016/j.jcp.2014.07.005en
dc.identifier.issn0021-9991en
dc.identifier.urihttp://hdl.handle.net/10919/75276en
dc.identifier.volume275en
dc.language.isoenen
dc.publisherAcademic Press – Elsevieren
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000341308900021&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectTechnologyen
dc.subjectComputer Science, Interdisciplinary Applicationsen
dc.subjectPhysics, Mathematicalen
dc.subjectComputer Scienceen
dc.subjectPhysicsen
dc.subjectData assimilationen
dc.subjectSensitivity analysisen
dc.subjectOptimal sensor designen
dc.subjectAdaptive observationsen
dc.subjectVARIATIONAL DATA ASSIMILATIONen
dc.subjectADJOINT SENSITIVITYen
dc.subjectCONSTRAINED OPTIMIZATIONen
dc.subjectADAPTIVE OBSERVATIONSen
dc.subject2ND-ORDER ADJOINTSen
dc.subjectOBSERVATION IMPACTen
dc.subjectERRORen
dc.subjectPARAMETERSen
dc.subjectALGORITHMen
dc.subjectEQUATIONSen
dc.titleAn optimization framework to improve 4D-Var data assimilation system performanceen
dc.title.serialJournal of Computational Physicsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Engineeringen
pubs.organisational-group/Virginia Tech/Engineering/COE T&R Facultyen
pubs.organisational-group/Virginia Tech/Engineering/Computer Scienceen

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