Leibniz MMS Days 2020 - Abstract

Bauer, Tobias

Multirate time integration for conservative two-way coupled atmosphere-ocean 1D and 2D models

For idealized studies of physical processes at the air-sea interface, it is of advantage to use joined atmosphere-ocean models, i.e. with one set of governing equations. Different (horizontal) discretizations are used for the ocean and atmosphere part. Multirate time integration methods offer the integration with different time steps for the ocean and atmosphere component. The exchange at the air-sea interface is then conducted with the large time step of the slow ocean component, i.e. the coupling takes place at each integration step. This presentation will show how multirate time integration schemes are applied for idealized atmosphere-ocean model with a conservative interpolation of flux data at the air-sea interface.