旋转正压大气中的Rossby孤立波和偶极子阻塞

SOLITARY ROSSBY WAVES IN THE ROTATING ATMOSPHERE AND DIPOLE BLOCKING

大气中的阻塞动力学一直是大气动力学中所要解决的重要问题之一,随着数学的发展,阻塞动力学的研究也取得了较大的进展。大气中的阻塞可以分为两类:一类是单个非偶极子阻塞(只存在高压或低压),另一类是偶极子阻塞(高压的南侧存在闭合的低压)。关于偶极子阻塞的动力学研究是在80年代以后才进行的。为了解释大气中所出现的偶极子阻塞,Mcwilliams(1980)

In this paper, solitary Rossby waves in the rotating atmosphere are investigated. It is found that under the condition of one meridional wave, the stationary solitary Rossby wave has dipole structure with the anticyclone north of the cyclone, and the stronger the rotational basic flow, the stronger the stationary dipole structure, more over, in the high latitude region, the dipole structure is also stronger, this shows that the local dipole structures obtained here can explain why the persistent dipole blocking usually occurs in the high latitude regions.