What are the structural characteristics of plateau vortex and the regional distribution of precipitation influence?

Plateau vortex (plateau vortex, southwest vortex and northwest vortex) is an important weather system affecting the heavy precipitation process in the plateau and its eastern adjacent areas, which can cause floods in summer and autumn in the plateau and its surrounding areas, and even lead to geological disasters such as mudslides. Its characteristics are divided into:

1. Climatic characteristics of plateau vortex;

Second, the spatial distribution characteristics.

The regional distribution of precipitation influence: the plateau vortex is mainly located in Naqu and Songpan, with two concentrated areas, mainly in the center of Naqu; The most active area of southwest vortex is Sichuan Basin, followed by Xiaojin and Jiulong. Northwest vortex is mainly concentrated in Qaidam basin.