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Regular version of the site
Advection of a passive scalar $\theta$ in $d=2$ by a large-scale velocity  field rapidly changing in time is considered. The Gaussian feature of the  passive scalar statistics in the convective interval was discovered in  \cite{95CFKLa}. Here we examine deviations from the Gaussianity: we obtain  analytically the simultaneous fourth-order correlation function of $\theta$.   Explicit expressions for fourth-order objects,  like $\langle(\theta_1-\theta_2)^4\rangle$ are derived.