An ensemble-based data assimilation system for forecasting variability of the Northwestern Pacific ocean
Yasumasa Miyazawa,
Max Yaremchuk,
Sergey M. Varlamov
et al.
Abstract:An adjoint-free four-dimensional variational (a4dVar) data assimilation (DA) is implemented in an operational ocean forecast system based on an eddy-resolving ocean general circulation model for the Northwestern Pacific. Validation of the system against independent observations demonstrates that fitting the model to time-dependent satellite altimetry during a 10-day DA window leads to substantial skill improvements in the succeeding 60-day hindcast. The a4dVar corrects representation of the Kuroshio path varia… Show more
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