西风带阻塞高压形成及崩溃动力机制的Euler-Lagrange理论解释

本文主要采用Euler-Lagrange理论,讨论正压剪切流的切变参数对阻塞高压形成的影响。研究表明:存在一个临界参数,当切变参数的绝对值超过这个临界参数,正压剪切流将分歧出阻塞流型,这意味着阻塞高压的形成;反之,当切变参数的绝对值小于这个临界参数,阻塞流型将恢复到剪切流,这意味着阻塞高压的崩溃。该研究一定程度回答了阻塞流型"怎么形成"和"怎么崩溃"这一基本而关键的问题。

Euler-lagrange theoretical explanation of dynamic mechanism about formation and breakdown of atmosphere blocking in westerly zone

This study discussed the influence of shear parameters of the barotropic shear flow on the formation of blocking, from the perspective of the local characteristics of the blocking. Studies have shown that there is a critical parameter, and when the absolute value of the shear parameter exceeds this critical parameter, the barotropic shear flow will bifurcate the blocking, which means the formation of blocking; on the contrary, when the absolute value of the shear parameter is less than this critical parameter, the blocking will return to shear flow, which means the collapse of the blocking. The research answers to a certain extent the basic and critical questions of "how to form" and "how to collapse" the blocking flow pattern.