The ocean surface layer mediates the transfer of energy, momentum, heat, matter, and trace gases between the ocean, atmosphere, and sea ice, and thus plays a central role in the dynamics of the climate system. This session will focus on the ocean surface layer globally, from the coasts – including the marginal sea ice zone – to the pelagic ocean, and its interactions with the overlaying low atmosphere. Of special interest will be contributions describing the impact of ocean surface-layer processes on air-sea fluxes and atmosphere-ocean feedback. These include the parameterization of air-sea interactions, the impact of tropical cyclones, and the role of extreme events. We also welcome studies about the understanding of ocean surface-interior interactions, particle and tracer dispersion, ice-ocean interactions, (sub-)mesoscale and internal-wave dynamics, as well as boundary-layer turbulence and surface-wave effects. Finally, we also encourage studies focusing on the coupling of physical, biological, and biogeochemical processes. Our session welcomes observational (from in-situ to remote sensing), theoretical, and numerical investigations focusing on the ocean surface layer and its interactions with the atmosphere and sea ice, regardless of the temporal and spatial scales considered.