Why is the Great Cold the coldest day in Northeast China? The climate is changing all the time.

After winter comes, the temperature will continue to drop. As the direct point of the sun gradually moves northward from winter to the future, the duration of the northern hemisphere will also become longer and the temperature at noon will gradually increase. Climatically, it is influenced by many factors, including natural factors and human factors. Throughout the cold winter, the coldest day is basically changing.

Great cold is not necessarily the coldest.

According to traditional time, as the last of all solar terms, severe cold also means the beginning of a new year. It is indeed the coldest day in the great cold, but with the influence of various natural and human factors, the temperature change is no longer so stable and single. Sometimes the coldest day in winter is not the great cold. The gradual warming after the great cold represents the beginning of spring and does not necessarily affect the climate.

Climatic characteristics of severe cold solar terms

In the north, the climate may indeed be colder during the severe cold, and it will be more affected. During the severe cold, solar terms and atmospheric circulation are relatively stable, and the circulation adjustment period is about 20 days. There is often a wide range of rain and snow weather and strong winds to cool down. Under the influence of the northwest wind flow control and the constantly supplemented cold air, there will be sustained low temperature in China. In winter in cold season, the wind is colder and there is less rain. Slight cold and severe cold are the periods with the least rain in a year. During the cold solar term all the year round, the rainfall in most parts of the south only increased slightly compared with the previous period, which further affected the overall climate and temperature.

Great cold, countdown to nine seconds.

In fact, winter is coming, and there is a traditional counting nine activity among the people, which can record the winter situation. Great cold is not the beginning of counting nine cold days. In the traditional calendar, the period with the lowest temperature in the whole year is called "Nine Cold Days", and the solar terms of severe cold coincide with the third and fourth nine days of "Nine Cold Days". Because the climate is too cold, people think it is the coldest chill. In fact, this is a wrong understanding. "Nine Cold Days" is a solar term from the winter solstice. So the number nine has nothing to do with the great cold.