What's the weather like all over the country during the Spring Festival in 2022? Will there really be extremely cold weather?

How low can the temperature be called extreme cold? What is the definition of extreme cold weather? Li Xiaoquan, chief meteorologist of China Weather Network, said that there is no clear definition of extreme cold weather, because the climatic conditions in different regions are different. For example, the coastal temperature in Guangdong is 0? Around, people will feel extremely cold, which can be called extremely cold; But in the north, zero degree is common, even if it is not extremely cold. There is cold air activity in the central and eastern regions. From the first day to the fifth day, there is moderate-intensity cold air activity in the central and eastern regions.

Among them, the first three days affect the eastern part of northwest China, north China and northeast China, and the fourth to fifth days affect Huanghuai, Jianghuai and Jiangnan. There are 4 ~ 6 northerly winds in the above areas, and the temperature drops by 4 ~ 8℃, exceeding 10℃ locally. There is more snowfall in northeastern Inner Mongolia, northern and eastern parts of Northeast China, and there is heavy snow in northern Heilongjiang and northeastern Inner Mongolia. From the night of the third day to the fourth day, there is weak snowfall or sleet in North China and Huanghuai; On New Year's Eve, the winds in the southern part of the East China Sea can reach 7-9. Recently, the extremely cold weather that frequently occurs in various places is related to the climate Arctic oscillation.

The strong cold wave in Europe, the snowstorm in Japan and the low temperature in China are all the same chain of extreme weather events caused by abnormal atmospheric circulation. In addition, La Nina events also have a certain impact on cold weather. Both climatologists and meteorologists believe that the sudden change of temperature in an instant is a normal atmospheric change, but the reason is difficult to explain. The weather conditions in different places will not remain the same, some places are extremely cold and some places are extremely hot, which is common, but overall, the frequency of extreme events has increased in recent years.

There is little to moderate rain in the south. From New Year's Eve to the first day, there is light rain in Jianghuai and eastern Jiangnan. On the fifth day or so, there was little to moderate rain in Jiangnan and northern South China. From the second day to the sixth day, it rained continuously in the southwest and east. Climate warming is causing changes in other elements of the climate system, especially the changes of fresh water flux and salinity in the North Atlantic caused by melting polar glaciers, land runoff and precipitation, which may further weaken or disintegrate the global thermohaline circulation and make the global climate suddenly enter the cold climate stage from the rapid warming period. Therefore, it is normal to enter the cold period because of the sudden change of climate caused by climate warming.