Abstract
Abstract. This paper describes a reduced-order quasi-geostrophic coupled ocean–atmosphere model that allows for an arbitrary number of atmospheric and oceanic modes to be retained in the spectral decomposition. The modularity of this new model allows one to easily modify the model physics. Using this new model, coined the "Modular Arbitrary-Order Ocean-Atmosphere Model" (MAOOAM), we analyse the dependence of the model dynamics on the truncation level of the spectral expansion, and unveil spurious behaviour that may exist at low resolution by a comparison with the higher-resolution configurations. In particular, we assess the robustness of the coupled low-frequency variability when the number of modes is increased. An "optimal" configuration is proposed for which the ocean resolution is sufficiently high, while the total number of modes is small enough to allow for a tractable and extensive analysis of the dynamics.
Funder
Belgian Federal Science Policy Office
Reference36 articles.
1. Cehelsky, P. and Tung, K. K.: Theories of multiple equilibria and weather regimes-A critical reexamination. Part II: Baroclinic two-layer models, J. Atmos. Sci., 44, 3282–3303, 1987.
2. Cessi, P. and Primeau, F.: Dissipative selection of low-frequency modes in a reduced-gravity basin, J. Phys. Oceanogr., 31, 127–137, 2001.
3. Charney, J. G. and Straus, D. M.: Form-drag instability, multiple equilibria and propagating planetary waves in baroclinic, orographically forced, planetary wave systems, J. Atmos. Sci., 37, 1157–1176, 1980.
4. Demaeyer, J. and Vannitsem, S.: Stochastic parameterization of subgrid-scale processes in coupled ocean-atmosphere systems: Benefits and limitations of response theory, arXiv preprint arXiv:1605.00461, under review, 2016.
5. Ghil, M. and Zaliapin, I.: El Niño/Southern Oscillation: Impacts, modeling and forecasts, in: Encyclopedia of Natural Hazards, 250–263, Springer, the Netherlands, 2013.
Cited by
31 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献