  We present the first simulations of a reduced magnetized plasma model that
incorporates both arbitrary wavelength polarization and non-Oberbeck-Boussinesq
effects. Significant influence of these two effects on the density, electric
potential and ExB vorticity and non-linear dynamics of interchange blobs are
reported. Arbitrary wavelength polarization implicates so-called
gyro-amplification that compared to a long wavelength approximation leads to
highly amplified small-scale ExB vorticity fluctuations. These strongly
increase the coherence and lifetime of blobs and alter the motion of the blobs
through a slower blob-disintegration. Non-Oberbeck-Boussinesq effects
incorporate plasma inertia, which substantially decreases the growth rate and
linear acceleration of high amplitude blobs, while the maximum blob velocity is
not affected. Finally, we generalize and numerically verify unified scaling
laws for blob velocity, acceleration and growth rate that include both ion
temperature and arbitrary blob amplitude dependence.
