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

作　　者：朱乾根[1] 

机构地区：[1]南京气象学院,江苏南京210044

出　　处：《山东气象》2002年第3期3-5,9,共4页Journal of Shandong Meteorology

基　　金：国家自然科学基金 49975 0 1 5项目资助

摘　　要：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.

关 键 词：正斜压涡度拟能 转换机制 净通量机制 净生成机制 

分 类 号：P433[天文地球—大气科学及气象学]