What is a front? What is the basis for front classification? What types of fronts can be divided into? What are the sudden changes in meteorological elements near the front?

Front is a meteorological term that refers to the junction area between warm and cold air currents. When warm and cold air masses meet, a sloping interface appears between them, called a front (frontal area).

Fronts are classified based on the moving direction and structural conditions of cold and warm air masses on both sides of the front.

Fronts are generally divided into four types: cold fronts, warm fronts, quasi-stationary fronts and imprisoned fronts.

Meteorological factors near the front: When a cold front moves in, there are often strong winds, dark clouds, torrential rain, and thunder and lightning. Warm fronts cause continuous cloudy weather with continuous drizzle.

Extended information:

The main quasi-stationary fronts in my country include the South China quasi-stationary front, the Jianghuai quasi-stationary front, the Kunming quasi-stationary front, and the Tianshan quasi-stationary front.

There are two types of quasi-stationary fronts that affect my country:

1. Terrain influence - Kunming quasi-stationary front and Tianshan quasi-stationary front.

2. Influence of atmospheric circulation - South China quasi-stationary front, Jianghuai quasi-stationary front.

The South China quasi-stationary front is mainly active in the Nanling Mountains or the South China Sea. It can be seen all year round, but it mostly appears in winter and spring.

Jianghuai quasi-stationary front. In early summer every year, the warm and humid air from the ocean and the cold air from the south from the mainland compete and confront each other in the middle and lower reaches of the Yangtze River and the Huaihe River Basin. It is an important weather system that forms the plum rain.

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