Simulation of ocean circulation, tides and sea-ice
Ocean tides interact with ocean circulation and sea-ice dynamics through various mechanisms and present an important dynamical subsystem for ocean prediction and our understanding of climate change and variability.
The most acknowledged tidal effect has been the generation of internal tides which provide a substantial amount of energy for deep ocean mixing and hence is important for the maintenance of global circulation.
Other climate-relevant tidal effects, to mention some, are the contribution to absorption processes of CO2 on the continental shelf by contributing to the mechanism of the 'continental shelf pump', their significant impact on the processes of sea-ice evolution and melting, and their interaction with the mean ocean circulation through non-linear bottom friction.
A key issue for simulating the combined ocean circulation and tides is the generation, propagation, and dissipation of internal tides (waves). The oscillating tidal current over topographic features will generate waves of different wavelengths. The short waves can not be fully resolved with circulation models and require parameterization, which is an ongoing topic of current research.
This project will use a state of the art coupled, ocean - sea ice model (HYCOM-CICE) to simulate the combined effects of ocean circulation and tides and explore current internal wave parameterizations for the Arctic ocean.