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Decay rate of higher order derivatives for solutions to the 2-D dissipative quasi-geostrophic flows. (English) Zbl 1185.35203
The author derives the title estimates in $$L^2$$-norm for the equations without forcing term. Under the additional assumption that the solution does not strongly deviate from the solution of the corresponding linear equations with the same initial data, the author is able to obtain lower and upper bounds on the decay. Instead of the usual Fourier splitting method applied to similar problems by many previous authors, here the main idea of the proof is based on Gevrey estimates.

##### MSC:
 35Q35 PDEs in connection with fluid mechanics 76U05 General theory of rotating fluids 86A05 Hydrology, hydrography, oceanography
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