  The paper deals with homogenization of divergence form second order parabolic
operators whose coefficients are periodic in spatial variables and random
stationary in time. Under proper mixing assumptions, we study the limit
behaviour of the normalized difference between solutions of the original and
the homogenized problems. The asymptotic behaviour of this difference depends
crucially on the ratio between spatial and temporal scaling factors. Here we
study the case of self-similar parabolic diffusion scaling.
