Remarks on the Global Regularity for the Super-Critical 2D Dissipative Quasi-Geostrophic Equation

Abstract

In this article we apply the method used in the recent elegant proof by Kiselev, Nazarov and Volberg of the well-posedness of critically dissipative 2D quasi-geostrophic equation to the super-critical case. We prove that if the initial value is smooth and periodic, and $\left\| \nabla \theta_0 \right\|_{L^{\infty}}^{1 - 2 s} \left\| \theta_0 \right\|_{L^{\infty}}^{2 s}$ is small, where $s$ is the power of the fractional Laplacian, then no finite time singularity will occur for the super-critically dissipative 2D quasi-geostrophic equation.