Parameterisation of the eddy-eddy and eddy-meanfield Interactions in the large eddy simulation of oceanic circulations
This paper presents parameterisations of the subgrid eddy-eddy and eddy-meanfield interactions in a baroclinic oceanic simulation representative of the Antarctic Circumpolar Current. High resolution benchmark simulations are undertaken using a quasi-geostrophic spectral spherical harmonic code of la...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
University of Poitiers
2013
|
| Subjects: | |
| Online Access: | https://research.monash.edu/en/publications/987bdef2-d6e1-47cd-92c7-6dfdbaebbc48 https://researchmgt.monash.edu/ws/files/242290326/242230625_oa.pdf http://www.scopus.com/inward/record.url?scp=85034032852&partnerID=8YFLogxK http://www.tsfp-conference.org/proceedings/2013/v1/env1b.pdf |
| Summary: | This paper presents parameterisations of the subgrid eddy-eddy and eddy-meanfield interactions in a baroclinic oceanic simulation representative of the Antarctic Circumpolar Current. High resolution benchmark simulations are undertaken using a quasi-geostrophic spectral spherical harmonic code of largest wavenumber T = 504. The eddyeddy interactions are represented by both stochastic and deterministic parameterisations, with model coefficients determined from the benchmark simulation truncated back to the large eddy simulation (LES) truncation wavenumber TR < T. Coefficients of the deterministic eddy-meanfield model are determined by a least squares regression method. Truncations are repeated for various TR, with the dependence of the coefficients on the resolution TR identified. Kinetic energy spectra from the LESs agree with the benchmark simulation. Scaling laws governing the subgrid coefficients are presented, which remove the need to generate the subgrid coefficients from benchmark simulations. |
|---|