The Ensemble Kalman Filter: theoretical formulation and practical implementation View Full Text


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Article Info

DATE

2003-11

AUTHORS

Geir Evensen

ABSTRACT

The purpose of this paper is to provide a comprehensive presentation and interpretation of the Ensemble Kalman Filter (EnKF) and its numerical implementation. The EnKF has a large user group, and numerous publications have discussed applications and theoretical aspects of it. This paper reviews the important results from these studies and also presents new ideas and alternative interpretations which further explain the success of the EnKF. In addition to providing the theoretical framework needed for using the EnKF, there is also a focus on the algorithmic formulation and optimal numerical implementation. A program listing is given for some of the key subroutines. The paper also touches upon specific issues such as the use of nonlinear measurements, in situ profiles of temperature and salinity, and data which are available with high frequency in time. An ensemble based optimal interpolation (EnOI) scheme is presented as a cost-effective approach which may serve as an alternative to the EnKF in some applications. A fairly extensive discussion is devoted to the use of time correlated model errors and the estimation of model bias. More... »

PAGES

343-367

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10236-003-0036-9

DOI

http://dx.doi.org/10.1007/s10236-003-0036-9

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1053511041


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