Confinement of a hot temperature patch in the modified SQG model
  In this paper we study the time evolution of a temperature patch in $R^2$ according to the modified Surface Quasi-Geostrophic Equation (SQG) patch equation. In particular we give a temporal estimate on the growth of the support, providing a rigorous proof of the confinement of a hot patch of temperature in absence of external forcing, under the quasi-geostrophic approximation. 
Roberto Garra
math.AP math-ph math.MP physics.flu-dyn