What is the cause of the cold wave?

Cold wave is a kind of disastrous weather in winter, and people are used to calling it cold wave. The so-called cold wave refers to the cold air from high latitudes, which is rapidly strengthened in a specific weather situation and invades the middle and low latitudes, causing a wide range of severe cooling, strong winds and rainy and snowy weather along the way. When this cold air reaches a certain standard, it is called a cold wave.

The outbreak of cold wave has different characteristics in different regional environments: in the northwest desert and loess plateau, there is less wind and snow, which is easy to lead to sandstorm weather; In Inner Mongolia grassland, it is windy, snowy and cold weather; In North China and Huanghuai areas, cold waves are often accompanied by snow. In the northeast, it is characterized by more violent winds and more snow, and the snowfall is the highest in the country; Jiangnan is often accompanied by freezing rain.

Extended data:

Hazards of cold wave:

The freezing rain, snow and ice weather brought by the cold wave is extremely harmful to transportation. The moving speed of the cold wave is tens of thousands of meters per hour, which is similar to the speed of the train. There are three routes that affect the cold wave in China: one is the west road. This is the earliest and most frequent route affecting China. Strong cold air starts from the Arctic, goes south through western Siberia, enters China and Xinjiang, and then invades North China, Central Plains, South China and even Southwest China along the Hexi Corridor.

The second is the middle road. Strong cold air flows from Siberia and Lake Baikal in Mongolia, passes through Inner Mongolia Autonomous Region of China, enters North China, and reaches the southeast coastal areas.

The third road is East Road. Cold air flows south from northeast Siberia, sometimes through northeast China, sometimes through the Sea of Japan and the Korean Peninsula, and invades the eastern coast of China. The main force of the cold wave going south from this route is eastward, which is generally not very strong and the frequency will not be too much.

Baidu encyclopedia-cold wave