Coupled ocean-atmosphere data assimilation at ECMWF
Browne, Philip ; Rosnay, Patricia de ; Zuo, Hao
For forecasts more than about three days ahead, components of the Earth system that are typically slower to change than the atmosphere become more important. This is true both in terms of their representation in the model and in terms of an accurate specification of the initial conditions on which forecasts are based. Such components include the ocean, sea ice and the land surface and how they dynamically interact with each other and the atmosphere.[...]Here we describe the form of weakly coupled data assimilation for the atmosphere, the ocean and sea ice implemented operationally in ECMWF's Integrated Forecasting System (IFS) in June 2018 (IFS Cycle 45r1) and June 2019 (IFS Cycle 46r1). </p>
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