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Spatially amplifying modes of the Charney baroclinic-instability problem

Journal of Fluid Mechanics Cambridge University Press (CUP) 170 (1986) 293-317
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Problems and Prospects in Long and Medium Range Weather Forecasting. Edited by D. M. BURRIDGE E. KäLLEN. Springer, 1984. 273 pp. DM 45.00 (pb).

Journal of Fluid Mechanics Cambridge University Press (CUP) 163 (1986) 498-500
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Dissipative Destabilization of External Rossby Waves

Journal of the Atmospheric Sciences American Meteorological Society 43:4 (1986) 388-396

Authors:

Isaac M Held, Raymond T Pierrehumbert, R Lee Panetta
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Remarks on a paper by Aref and Flinchem

Journal of Fluid Mechanics Cambridge University Press (CUP) 163 (1986) 21-26
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DISSIPATIVE DESTABILIZATION OF EXTERNAL ROSSBY WAVES.

Journal of the Atmospheric Sciences 43:4 (1986) 388-396

Authors:

IM Held, RT Pierrehumbert, RL Panetta

Abstract:

External Rossby waves in vertical shear can be destabilized by thermal damping. They can also be destabilized by damping of potential vorticity if this damping is larger in the lower than in the upper troposphere. Results are described in detail for Charney's model. Implications for the effects of diabatic heating and mixing due to smaller scale transients on equivalent barotropic stationary or quasi-stationary long waves are discussed. It is pointed out that energy or potential enstrophy budgets may indicate that transients are damping the long waves while, in fact, their presence is destabilizing these waves.
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