Dissipative centrifugal instability in a rotating conducting atmosphere

It is shown that the earlier revealed dissipative centrifugal instability of large-scale two-dimensional vortex motions of a neutral gas in a rapidly rotating atmosphere may also occur for analogous motions of a weakly ionized gas in a magnetic field in the absence of dissipation, in which case it is necessary to take into account electrodynamic effects, namely, the induction drag and the gyroscopic force due to the Hall current. In a conducting atmosphere, strictly anticyclonic circulations occurring during dissipative centrifugal instability in a neutral atmosphere may not be possible or may even change into cyclonic circulations, depending on the value of the Hall conductivity.