阻塞过程中正斜压涡度拟能相互转换机制的重要性

The importance of transformation mechanism between the barotropic and baroclinic enstrophy in the blocking process over Ural Mountains

使用正斜压涡度拟能方程对一次乌拉尔山阻塞过程的研究表明 ,虽然正、斜压涡度拟能向阻塞区内的净输送、阻塞区域内正斜压涡度拟能的净生成以及 β效应是阻塞环流建立、维持和崩溃的基本能源 ,但正斜压涡度拟能相互转换机制则是阻塞过程得以形成的根本原因。如果没有正斜压涡度拟能相互转化机制 ,则阻塞环流不但不能形成 ,反而使大气的斜压性不断增强 ,正压性不断减弱。

The strengthening and weakening of the barotropic and baroclinic enstrophy are the significant features of the blocking process over Ural Mountains. Also the net transportation, net production and β effect of barotropic and baroclinic enstrophy are the energy source in the blocking process, but the transformation mechanism between barotropic and baroclinic enstrophy are the fundamental reason of the blocking process formation. Without this transformation mechanism, the blocking circulation cannot form.