大气中局地阻高和偶极子阻塞的动力学特征

THE DYNAMICAL CHARACTERS OF LOCAL BLOCKING HIGH AND DIPOLE BLOCKING IN THE ATMOSPHERE

在局地阻塞形成前期的原地一般有比较弱的高压脊存在，在这个高压脊上可以逐渐形成局地阻塞高压或偶极子阻塞。本文将局地阻塞形成前期的弱高压脊环流看成是具有反气旋式切变的带状基本西风，在此基础上用Ｒｏｓｂｙ孤立波理论研究了局地阻高和偶极子阻塞的动力学特征及其区别，得到了一些结果。

In general,there is a weak high pressure ridge over the initial position of local blocking formation,the high pressure ridge can be developed into local blocking high or dipole blocking In this paper,the basic circulation of weak high pressure ridge before local blocking forming can be considered as zonal westerlies with anticyclonic shear,on the basis of that, the solitary Rossby wave theory is used to study the dynamical characters of local blocking high and dipole blocking and their differences,and some results are obtained as well