Dynamic Processes of the Moving and Developing Lows on the Qinghai–Xizang Plateau During the Early Summer

Through analysis of the processes of the developing and disappearing lows on the Qinghai –Xizang Plateau in June 1980—1983, the relationships between 300 hPa southwest jet and the moving and developing lows on Qinghai–Xizang Plateau have been obtained, and the action of A (advection) and fξ’ (nongeostrophic) terms in divergence equation have been discussed. The existence of jet determines directly an increase in A and fξ’ terms. It is an important dynamic cause for the lows eastward moving and developing. Finally, the dynamic processes of the lows developing and moving along the northern side of jet’s axis have been detailed by advection equation and adjustment equation