Fig. 8From: VHF radar measurements of momentum flux using summer polar mesopause echoesSubscale mean square radial velocities (left), momentum fluxes (centre) and isotropies (right) for periods less than 12.8 h. The colours for the radial velocities are V, red, NW blue, N green, NE orange, SW brown, and W purple. Note that the isotropy scale is different from that in Fig. 9. Values of the subscale flux vary about zero with height, and are essential zero, as are those for the isotropyBack to article page