What are the characteristics of cold wave?

The outbreak of cold wave has different characteristics in different geographical environments:

In the northwest desert and loess plateau, it is characterized by less wind and snow, which is easy to cause 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.

There is a strong cold front on the high pressure front of the cold wave ground, which inclines to the cold air side with the height, and there is a strong front area on the high altitude isobaric surface. The front area is wide and narrow in structure, and there are obvious cold troughs and front areas on the isobaric surface below 300hPa.

Cold wave frostbite:

An obvious feature of cold wave weather is severe cooling. Low temperature will lead to crop freezing, rivers and ports freezing, traffic interruption, and often bring economic losses to industry and agriculture. Cold wave freezing injury refers to the freezing injury of winter cold to overwintering crops. The cold wave weather process is a weather process in which a large range of strong cold air moves south in high latitudes, causing severe cooling and strong winds in its path.

When the temperature drops below 0℃ (freezing point) or remains below 0℃ for a long time, the plants of overwintering crops will be frozen and lose all physiological activities, leading to plant withering or death. Severe low temperature will also cause livestock to get sick or freeze to death, which will lead to serious meteorological disasters in agriculture and animal husbandry, that is, cold wave freezing injury.

Cold wave freezing injury is mainly caused by low temperature freezing injury to plant tissues below 0℃ (freezing point). Many research results show that the freezing of cells and tissues caused by low temperature is the cause of plant death.