What is the meaning of typhoon peripheral circulation?

The weather around the typhoon is chaotic, and the clouds roll to form a circulation.

The periphery of the typhoon is a windy area on the edge of the typhoon. The weather in this area is chaotic and ups and downs, with heavy and small rainfall, falling and stopping. The wind gradually increased to the center of the typhoon, and the air pressure decreased.

Circulation refers to circuitous flow, that is, trying to make all or part of the fluid circulate in a certain direction and path in the flow system.