Group seminar on 23. January, 14:15 CET
Gray-Zone Vertical Momentum Fluxes in the Tropics
Valentino Neduhal
The transfer of momentum by atmospheric waves is an essential process in the global momentum budget of the atmosphere. As the waves propagate upward and dissipate, they provide forcing for large-scale atmospheric flows, such as the quasi-biennial oscillation (QBO) in the tropical stratosphere. However, the contributions to the momentum budget of different types of resolved waves, such as Kelvin, equatorial Rossby, mixed Rossby-gravity, and inertia-gravity waves across scales, are still highly uncertain. This talk will introduce a novel method for the computation of regime and scale-dependent momentum fluxes and present quantification of vertical momentum fluxes on scales where all wave types are almost equally energetic (i.e., gray-zone).