EUREC4A-OA

EUREC4A-OA implements ad-hoc innovative observations and a hierarchy of numerical simulations focusing on mesoscale and submesoscale ocean dynamics and the atmospheric boundary layer at scales ranging from 20 m to 1000 km over the northwest tropical North Atlantic. The aim is to advance our knowledge of the phenomenology and representation of air-sea interactions, physical and biogeochemical ocean small-scale non-linear processes in ESMs but also in NWPs, S2Ss and decadal forecasts operational systems.

• Assessing the impact of the diurnal cycle on energy, water and CO2 ocean-atmosphere exchangesand quantifying the modification of diurnal cycle and the related exchanges by meso-scale and submeso-scale features and other extreme conditions

• Assessing the impact of the diurnal cycle on energy,water and CO2 ocean-atmosphere exchanges

• The identification and quantification of the processes ruling the ocean-atmosphere exchanges and uptake of heat,momentum and CO2 at the ocean nonlinear small scales (from a few tens of meters to 500 km)

• The role of various processes (diurnal cycle, ocean nonlinear small scales, boundary layer aerosols)on the atmosphere shallow convection and cloud formation

• To provide improved models metrics and parameterizationsfor the above processes to be integrated in operational prediction systems and ESMs.