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Moments and lower bounds in the far-field of solutions to quasi-geostrophic flows

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  • We consider the long time behavior of moments of solutions and of the solutions itself to dissipative Quasi-Geostrophic flow (QG) with sub-critical powers. The flow under consideration is described by the nonlinear scalar equation

    $\frac{\partial \theta}{\partial t} + u\cdot \nabla \theta + \kappa (-\Delta)^{\alpha}\theta =f$, $\theta|_{t=0}=\theta_0 $

    Rates of decay are obtained for moments of the solutions, and lower bounds of decay rates of the solutions are established.

    Mathematics Subject Classification: 35Q35, 76B03.

    Citation:

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