A simple model of baroclinic adjustment and parameterization of eddy heat transport |
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| Authors: | Dr Ch A Lin |
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| Institution: | (1) Department of Physics, University of Toronto, Ontario, Canada;(2) Present address: Department of Meteorology, McGill University, 805 Sherbrooke Street, West, H3A 2K6 Montreal, PQ, Canada |
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| Abstract: | Summary A nonlinear, forced, dissipative quasi-geostrophic, two-level  -plane model of baroclinic instability is formulated. The model resolves a baroclinic zonal flow and a wave of arbitrary zonal scale. Multiple equilibrium solutions describing Hadley and eddy circulations coexist. Only the circulation with smaller thermal wind is stable. The most efficient eddy activity occurs at a zonal wavenumber close to the wavelength of maximum instability of linear baroclinic instability theory. For a wide range of forcing and dissipative parameters, the steady baroclinic zonal wind of the eddy regime is close to the critical shear of linear theory. Eddy statistics are obtained analytically in terms of the doparture of the zonally symmetric state from radiative equilibrium. A parameterization for the eddy heat transport is obtained.With 14 Figures |
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