A comparison of sequential assimilation schemes for ocean prediction with the HYbrid Coordinate Ocean Model (HYCOM): Twin experiments with static forecast error covariances

► Four covariance matrix approximations for data assimilation with HYCOM are compared. ► Assimilation into HYCOM is most effectively done in the native generalized coordinates. ► 3D covariances perform better than vertically decoupled and separable 2D covariances. ► Surface information alone is insu...

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