What is a cover? What is the basis of the previous classification? What types can the front be divided into? What are the abrupt changes of meteorological elements near the front?

Front is a meteorological term that refers to the intersection of cold and warm air. When cold and warm air masses meet, there will be an inclined interface between them, which is called front (front area).

The classification of fronts is based on the moving direction and structure of cold and warm air masses on both sides of fronts.

Fronts are generally divided into four types: cold front, warm front, quasi-static front and occluded front.

When the cold front near the front moves, it is often windy, full of dark clouds, heavy rain and lightning, and the warm front causes continuous drizzle and cloudy weather.

Extended data:

The quasi-static front in China mainly includes South China quasi-static front, Jianghuai quasi-static front, Kunming quasi-static front and Tianshan quasi-static front.

Two types of quasi-static fronts affecting China;

1. Terrain influence-quasi-static front in Kunming and quasi-static front in Tianshan.

2. The influence of atmospheric circulation-South China quasi-static front and Jianghuai quasi-static front.

The quasi-static front in South China is mainly active in Nanling Mountains or South China Sea, which can be seen all year round, but mostly in winter and spring.

Jianghuai quasi-static front, every summer, warm and humid air from the ocean and cold air from the mainland confront each other in the middle and lower reaches of the Yangtze River and Huaihe River basin. It is an important weather system that forms Meiyu.

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