The main instabilities induced by rotation in stellar interiors are described. We derive from first principles the general equation describing the transport of the angular momentum. The case of the transport of the chemical species is also discussed. As long as the mass loss rates are not too important, meridional currents, by advecting angular momentum from the inner regions to the outer layer...

Linear instabilities and turbulent processes in equatorial and high-latitude electrojets lead to formation of plasma density irregularities which create much of the common E-region radar clutter. Studies of these irregularities have focused on the role of the Farley-Buneman (FB) and gradient drift instabilities with the assumption that the plasma behaves isothermally or adiabatically. In the la...