Ocean-wave-related changes in the next model upgrade
Changements liés aux vagues océaniques dans la prochaine mise à jour du modèle
Bidlot, Jean-Raymond ; Janssen, Peter
This article presents recent developments related to ocean wind waves within ECMWF's Earth system model. A revision of how waves are generated by wind is proposed. It improves the representation of air-sea momentum exchange under strong wind conditions, such as tropical cyclones and intense windstorms. Accounting for the role of the sea state (waves) in heat and moisture exchange has also been successfully introduced. These updates are informed by the strategic view that a better representation of coupled processes at the interfaces between components of the Earth system will lead to more realistic simulations of impactful weather conditions and, potentially, to a better use of observations sensitive to the ocean surface. These developments will be part of Cycle 49r1 of ECMWF's Integrated Forecasting System (IFS), which will replace IFS Cycle 48r1 later this year.</p>
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