"Coupled Ocean-Atmosphere Covariances in Global Ensemble Simulations: Impact of an Eddy-Resolving Ocean"

We examine patterns of correlations between atmosphere, ocean, and ice in a high-resolution (1/12° ocean and ice, and 1/3° atmosphere) ensemble of global models. We highlight regimes when coupled fluids are strongly correlated and, hence, can be expected to benefit from strongly coupled data assimilation. A comparison with models at lower resolution reveals that coupling in the boundary currents and in the tropical ocean requires highly resolved vertical and horizontal grids.