对流凝结加热和垂直风切变对行星波垂直传播的影响

本文从理论上分析研究了对流凝结加热和垂直风切变对大气行星波垂直传播的影响。结果表明,对流凝结加热有抑制行星波垂直传播的作用;基本气流的西风(正)垂直切变对行星波的垂直传播有利,而东风(负)切变却对行星波的垂直传播有阻碍作用。 进-步分析还发现,垂直风切变对行星波垂直传播的影响以在中高纬度地区更为显著;对流凝结加热对行星波垂直传播的影响在热带地区更值得重视。并且,垂直风切变和对流凝结加热的影响可能是使得大气中板地波导更显著的重要原因之一。 

INFLUENCES OF CONVECTIVE CONDENSATION HEATING AND VERTICAL SHEARING OF WINDS ON VERTICAL PROPAGATING OF PLANETARY WAVES IN THE ATMOSPHERE

A theoretical analysis about the influence of convective condensation heating and the vertical shearing of the basic flow on vertical propagating of planetary waves in the atmosphere is completed in this paper.The results show that the convective condensation heating has a restraint for the vertical propagating of the plane-tary waves and the westerly shearing of the basic flow (positive shearing) is conducive to propagating of the planetary waves but the easterly shearing of the basic flow (negative shearing) will impede the vertical propagating of planetary waves.The further analysis shows that the influence of the vertical shearing of the basic flow on the vertical propagating of planetary waves is more notable in the high latitude and the influence of convective condensation heating on the vertical propagating of planetary waves is more important in the tropics. The effects of the vertical shearing of basic flow and the convective condensation heating are probably the important reasons leading to that the pole wave-guide in the vertical propagating of stationary planetary waves is the most obvious.