Tropical Instability Waves in the Atlantic Ocean and their implications for ocean-atmosphere variability in high-resolution ICON simulations
In the upper ocean, TIWs are well captured in ICON-O. Furthermore, the simulated TIWs initiate downward and eastward propagating Yanai wave beams which transfer energy into the deep ocean. Despite this, EDJs are not present in the simulation. This suggests that ICON-O is a useful tool for studying upper ocean dynamics related to TIWs, while deep ocean dynamics are misrepresented. Therefore, I conduct sensitivity experiments to explore why the realistically simulated Yanai wave beams in ICON-O do not destabilize into EDJs. My results will provide important insights into why EDJs are generally absent in models with a realistic setup. Hence, this study could help to include realistic EDJs in future simulations. Ultimately, this will allow for studying the impact of EDJs on regional climate in coupled models.