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Author

Xiao-Qun Cao

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Oct 2026

A localized weighted ensemble adjustment Kalman filter for high-dimensional nonlinear data assimilation

Particle filters provide a nonlinear Bayesian framework for data assimilation, but global weights often degenerate in high-dimensional geophysical systems. Ensemble Kalman filters are stable with practical ensemble sizes, yet their Gaussian and locally linear updates can be restrictive for nonlinear observations and...

Meng-Ge Zhou, Xiao-Qun Cao, Yan Chen et al. · 0 citations
Open access Sep 2026

Nonlinear Latent-Space Data Assimilation for Sea Surface Height Reconstruction from Sparse Observations

Latent-LWETKF, a structured latent-space implementation of the localized weighted ensemble transform Kalman filter, is developed, supporting tractable nonlinear ensemble analysis with 40 members while retaining physical observation geometry and complete-field decoding context.

Meng-Ge Zhou, Xiao-Qun Cao, Yan Chen et al. · 0 citations

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