The Influence of Shearing Neutral Winds on the Two Stream Instability in the Equatorial Electrojet

The influence of the vertical current driven by some shearing neutral winds an the dispertion relation, the growth rate and the saturated turbulence level of the two-stream instability in the equatorial electrojet is discussed. For j_⊥～2×10^-7A/m², the influence is obvious and can be significant when the driven electric field approches the critical value of the instability. It is shown that the vertical current driven by semidiurnal tidal winds is one of the possible reasons of the high turbulence level of type "H" echoes observed during the counter-electrojet.