  We study the enstrophy cascade at small spatial scales in statistically
stationary forced-dissipated 2D Navier-Stokes equations subjected to the
Coriolis force in the \beta-plane approximation. We provide sufficient
conditions inspired by [6] to prove that on small scales, in the presence of
the Coriolis force, the so-called third-order structure function's asymptotics
follows the third-order universal law of 2D turbulence without the Coriolis
force. Our result indicates that on small scales, the enstrophy flux from
larger to smaller scales is not affected by the Coriolis force, confirming
experimental and numerical observations. To the best of our knowledge, this is
the first mathematically rigorous study of the above equations. We also proved
well-posedness and certain regularity properties to obtain the mentioned
results.
