Matches in SemOpenAlex for { <https://semopenalex.org/work/W2283485305> ?p ?o ?g. }
- W2283485305 abstract "Two families of methods are widely used in data assimilation: the four-dimensional variational (4D-Var) approach, and the ensemble Kalman filter (EnKF) approach. The two families have been developed largely through parallel research efforts. Each method has its advantages and disadvantages. It is of interest to develop hybrid data assimilation algorithms that can combine the relative strengths of the two approaches. This paper proposes a subspace approach to investigate the theoretical equivalence between the suboptimal 4D-Var method (where only a small number of optimization iterations are performed) and the practical EnKF method (where only a small number of ensemble members are used) in a linear setting. The analysis motivates a new hybrid algorithm: the optimization directions obtained from a short window 4D-Var run are used to construct the EnKF initial ensemble. The proposed hybrid method is computationally less expensive than a full 4D-Var, as only short assimilation windows are considered. The hybrid method has the potential to perform better than the regular EnKF due to its look-ahead property. Numerical results show that the proposed hybrid ensemble filter method performs better than the regular EnKF method for the test problem considered." @default.
- W2283485305 created "2016-06-24" @default.
- W2283485305 creator A5000802830 @default.
- W2283485305 creator A5008436217 @default.
- W2283485305 date "2015-01-01" @default.
- W2283485305 modified "2023-10-14" @default.
- W2283485305 title "AN ERROR SUBSPACE PERSPECTIVE ON DATA ASSIMILATION" @default.
- W2283485305 cites W1485106127 @default.
- W2283485305 cites W1522319528 @default.
- W2283485305 cites W1573860137 @default.
- W2283485305 cites W1672771901 @default.
- W2283485305 cites W1977665529 @default.
- W2283485305 cites W1980785126 @default.
- W2283485305 cites W1989575957 @default.
- W2283485305 cites W1990088363 @default.
- W2283485305 cites W1993589255 @default.
- W2283485305 cites W1994812176 @default.
- W2283485305 cites W2000561583 @default.
- W2283485305 cites W2009104157 @default.
- W2283485305 cites W2015451024 @default.
- W2283485305 cites W2017865929 @default.
- W2283485305 cites W2037500014 @default.
- W2283485305 cites W2041863660 @default.
- W2283485305 cites W2050814275 @default.
- W2283485305 cites W2062890270 @default.
- W2283485305 cites W2064754850 @default.
- W2283485305 cites W2078394884 @default.
- W2283485305 cites W2081304985 @default.
- W2283485305 cites W2099609198 @default.
- W2283485305 cites W2105934661 @default.
- W2283485305 cites W2120349205 @default.
- W2283485305 cites W2123123006 @default.
- W2283485305 cites W2137432135 @default.
- W2283485305 cites W2147455485 @default.
- W2283485305 cites W2147698782 @default.
- W2283485305 cites W2152599715 @default.
- W2283485305 cites W2161358768 @default.
- W2283485305 cites W2162417669 @default.
- W2283485305 cites W2162870936 @default.
- W2283485305 cites W2164505281 @default.
- W2283485305 cites W2168102396 @default.
- W2283485305 cites W2170811884 @default.
- W2283485305 cites W2171411815 @default.
- W2283485305 cites W2174105915 @default.
- W2283485305 cites W2175575957 @default.
- W2283485305 cites W2179860363 @default.
- W2283485305 cites W2179952483 @default.
- W2283485305 cites W2180274418 @default.
- W2283485305 cites W2180946617 @default.
- W2283485305 cites W238180860 @default.
- W2283485305 cites W2441454476 @default.
- W2283485305 cites W62957235 @default.
- W2283485305 doi "https://doi.org/10.1615/int.j.uncertaintyquantification.2015009880" @default.
- W2283485305 hasPublicationYear "2015" @default.
- W2283485305 type Work @default.
- W2283485305 sameAs 2283485305 @default.
- W2283485305 citedByCount "3" @default.
- W2283485305 countsByYear W22834853052016 @default.
- W2283485305 countsByYear W22834853052020 @default.
- W2283485305 countsByYear W22834853052021 @default.
- W2283485305 crossrefType "journal-article" @default.
- W2283485305 hasAuthorship W2283485305A5000802830 @default.
- W2283485305 hasAuthorship W2283485305A5008436217 @default.
- W2283485305 hasConcept C106131492 @default.
- W2283485305 hasConcept C11413529 @default.
- W2283485305 hasConcept C118615104 @default.
- W2283485305 hasConcept C119857082 @default.
- W2283485305 hasConcept C121332964 @default.
- W2283485305 hasConcept C124101348 @default.
- W2283485305 hasConcept C126255220 @default.
- W2283485305 hasConcept C12713177 @default.
- W2283485305 hasConcept C153294291 @default.
- W2283485305 hasConcept C154945302 @default.
- W2283485305 hasConcept C157286648 @default.
- W2283485305 hasConcept C206833254 @default.
- W2283485305 hasConcept C24552861 @default.
- W2283485305 hasConcept C2780069185 @default.
- W2283485305 hasConcept C31972630 @default.
- W2283485305 hasConcept C32834561 @default.
- W2283485305 hasConcept C33923547 @default.
- W2283485305 hasConcept C41008148 @default.
- W2283485305 hasConcept C45942800 @default.
- W2283485305 hasConcept C79334102 @default.
- W2283485305 hasConceptScore W2283485305C106131492 @default.
- W2283485305 hasConceptScore W2283485305C11413529 @default.
- W2283485305 hasConceptScore W2283485305C118615104 @default.
- W2283485305 hasConceptScore W2283485305C119857082 @default.
- W2283485305 hasConceptScore W2283485305C121332964 @default.
- W2283485305 hasConceptScore W2283485305C124101348 @default.
- W2283485305 hasConceptScore W2283485305C126255220 @default.
- W2283485305 hasConceptScore W2283485305C12713177 @default.
- W2283485305 hasConceptScore W2283485305C153294291 @default.
- W2283485305 hasConceptScore W2283485305C154945302 @default.
- W2283485305 hasConceptScore W2283485305C157286648 @default.
- W2283485305 hasConceptScore W2283485305C206833254 @default.
- W2283485305 hasConceptScore W2283485305C24552861 @default.
- W2283485305 hasConceptScore W2283485305C2780069185 @default.
- W2283485305 hasConceptScore W2283485305C31972630 @default.
- W2283485305 hasConceptScore W2283485305C32834561 @default.
- W2283485305 hasConceptScore W2283485305C33923547 @default.