Global in Time Classical Solutions to the 3d Quasigeostrophic System for Large Initial Data
نویسندگان
چکیده
In this paper, the authors show the existence of global in time classical solutions to the 3D quasi-geostrophic system with Ekman pumping for any smooth initial value (possibly large). This system couples an inviscid transport equation in R+ with an equation on the boundary satisfied by the trace. The proof combines the De Giorgi regularization effect on the boundary z=0 -similar to the so called surface quasi-geostrophic equation-, with Beale-Kato-Majda techniques to propagate regularity for z > 0. A potential theory argument is used to strengthen the regularization effect on the trace up to the Besov space B ∞,∞.
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