Is the typhoon high or low?

The typhoon center is in a low pressure state relative to its surroundings. Typhoon is a kind of tropical cyclone, which is a cyclonic circulation on the sea surface in tropical and subtropical areas, and is one of the most destructive weather systems in geophysical environment. The basic characteristics of the horizontal distribution of pressure in typhoon area are: the central pressure is very low, the isobar is approximately circular, and the pressure gradient around the typhoon eye is the largest.

Strong tropical cyclones not only form strong winds and huge waves, but also often accompany with heavy rains and storm surges, causing serious disasters.

How is a typhoon formed?

Typhoon originated in tropical ocean, where the temperature is high and a large amount of seawater is evaporated into the air, forming a low pressure center. With the change of air pressure and the movement of the earth itself, the inflow of air also rotates, forming a counterclockwise air vortex, which is a tropical cyclone. As long as the temperature does not drop, this tropical cyclone will get stronger and stronger, and finally a typhoon will form.

Typhoon classification

In China, tropical cyclones in the South China Sea and the Northwest Pacific are classified into six grades according to the maximum average wind speed near the bottom center, and the wind near the center reaches 12 or above, which is collectively called typhoon. According to its intensity, typhoons are divided into six grades: tropical depression, tropical storm, strong tropical storm, typhoon, strong typhoon and super typhoon.