The Ed Lorenz Symposium


Maximum likelihood ensemble filter: exploiting dynamic localization of Lyapunov vectors

Milija Zupanski, Colorado State University, Fort Collins, CO; and S. J. Fletcher, I. M. Navon, and B. Uzunoglu

The error covariance formulation in the maximum likelihood ensemble filter (MLEF) suggests a close connection with Lyapunov (linear regime) and bred vectors (nonlinear regime). The issue of error covariance localization is addressed in relation to the localization property of Lyapunov vectors, and the related roughening interface theory. Results with assimilation of simulated observations, using a global shallow-water model, will be presented. In particular, the impact of dynamic localization on the number of assimilated observations will be examined.

Poster Session 1, Lorenz Symposium Posters
Thursday, 13 January 2005, 9:45 AM-9:45 AM

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