Incomparison to the numerical experiment without terrianinfluences, the orographic effects in themodel would contribute to the formation of E-W shear line and promote the development of thecloudcluster.

• 与无地形的数值试验相比,地形作用有利于在长江中下游形成一条近于东西方向的切变线,对系统的发展有促进作用。