This project, which builds on the results of the ANR COCOA project, aims at improving the representation of turbulent ocean-atmosphere exchanges in climate models by taking into account their modulation by waves using ocean-waves-atmosphere coupled modelling systems. Waves form by absorbing momentum in areas of storms and tropical cyclones, and transmit part of it to the ocean, with an impact on deep mixing and the overall heat balance. This energy absorbed by waves can be transported by swell over very long distances, from energetic areas (Southern Ocean, storms) to the inter-tropical band, for example. In this inter-tropical zone, where much of the heat and moisture exchange that drives atmospheric circulation on climatic scales takes place, conditions are met for swell to impact air-sea fluxes. It is therefore important to take into account the impact of waves in energetic zones, where they are formed and a large part of the energy is transferred to the ocean, and in dissipation zones, where they have an impact on surface fluxes. We plan to: 1) quantify the impact of wave-related processes on atmosphere-wave and wave-ocean exchanges at climate scales, based on existing model representations; 2) develop and validate new parameterizations to take into account, in coupled ocean-wave-atmosphere models at climate scales, processes related to tropical cyclones, the effect of waves on ocean mixing, and swell; 3) to build a coupled system around the wave model, ensuring complete consistency of momentum exchanges by resolving the inconsistencies of most of the current coupled systems used at weather prediction scales. This project should pave the way for state-of-the-art consideration of wave effects in climate models.