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Surface Quasi-Geostrophic Equation driven by Space-Time White Noise

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arxiv 2111.04644 v1 pith:QHAX2TQJ submitted 2021-11-08 math.PR math.AP

classification math.PRmath.AP
keywords drivenequationexistencenoisequasi-geostrophicregularityriesz-transformssolution
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We consider the Surface Quasi-Geostrophic equation (SQG) driven by space-time white noise and show the existence of a local in time solution by applying the theory of regularity structures. A main difficulty is the presence of Riesz-transforms in the non-linearity. We show how to lift singular integral operators with a particular structure to the level of regularity structures and using this result we deduce the existence of a solution to SQG by a renormalisation procedure. The fact that the Riesz-transforms act only in the spatial variable makes it necessary to use inhomogeneous models instead of the standard ones.

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