The stability of large—scale horizontal air motion in the non—linear basic zephyr flow under the effect of rossby parameter

The stability of large—scale horizontal motion in the atmosphere is discussed in this paper by using qualitative . analysis theory of non—linear ordinary differential equations. Both the non-linear distribution of basic Zephyr flow and the variation of geostrophic vorticity along the latitude (f =f ₀ + βδy ) are all included in this paper’s mathematical model so as to analogue the background field of large-scale horizontal air motion more really in the rotating reference frame of the earth. Some significant results are drawn out from this paper and the conclusions of Li(1986)’s and Wan et al.(1990)’s are extended widely.