NUMERICAL EXPERIMENTS OF PROPAGATION CHARACTERS OF FORCED TWO DIMENSION ROSSBY WAVE

Factors (topograph structure, basic flow) affecting ray characters of two dimensional Rossby wave are examined in this paper by numerical experiments. The numerical expriment results show that: (1) under conditions of west basic flows and ideal topography of half ellipsoid,there is a wavetrain with a parabolic route in the east of the topography; (2) wavetrains of vertical motion disturbance may propagate southward; (3) under conditions of the r=al topography and westerlies,the wavetrain path shows a sine wave,and vorticity deviations forced by zonal sea-land thermal differences also show a sine wave pattern.