The Study of the Blocking Circulational Development Excited by the Barotropic and Baroclinic Enstrophy Interaction over Ural Mountains

The strengthening and weaking of the barotropic enstrophy are the important characteristics of the blocking process over Ural mountains.The main mechanism of strengthening barotropic enstrophy is the transformation from baroclinic enstrophy to barotropic enstrophy.The baroclinic enstrophy comes from the net transport from outside to inside of the blocking area and the net growth of the baroclinic enstrophy.The weakening mechanism of the barotropic enstrophy is the drag machanism and β effect.Therefore,the blocking process is the results of barotropic and baroclinic enstrophy interaction.