摘要
正压涡度拟能的增强和减弱是乌拉尔山上空阻塞过程的重要特征,正压涡度拟能增强的主要机制是斜压涡度拟能向正压涡度拟能的转换,而斜压涡度拟能的来源则是阻塞区外斜压涡度拟能向阻塞区的净输送和阻塞区内斜压涡度拟能的净生成。正压涡度拟能减弱的主要机制是耗散机制和β效应。因此,阻塞过程是正、斜压涡度拟能相互作用的结果。
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.
出处
《科学技术与工程》
2002年第3期17-19,共3页
Science Technology and Engineering
基金
国家自然科学基金(49975015)
关键词
斜压涡度拟能
相互作用
正压涡度拟能
乌拉尔山
阻塞环流
barotropic and baroclinic enstrophy
transformation mechanism
net flux mechanism
blocking circulation
