The origin of slight cold

The slight cold solar term originated in the Yellow River Basin. In the twenty-four solar terms, there is a saying that "the cold is still small at the beginning of the month, and it is cold in half a month", that is to say, in the Yellow River basin, the great cold at that time was colder than the slight cold.

The slight cold is still in the last few days of February 9, and it will take a few days for the slight cold to enter the March 9, and the slight cold in winter corresponds to the slight heat in summer, so it is called slight cold.

During the slight cold season, old Nanjing usually cooks delicious food, among which dwarf yellow, sausage and salted duck are all famous specialties in Nanjing. The tradition in Guangzhou is that Xiao Han eats glutinous rice in the morning, stir-frying bacon, sausage, peanuts and chopped green onion and mixing them in the rice.

In ancient China, slight cold was divided into three stages: "The first stage is to wait for Yanbei Township, the second stage is to wait for magpies to start nesting, and the third stage is to wait for pheasants to start swimming". The ancients believed that the geese among migratory birds migrated along the yin and yang, and at this time, the yang was already moving, so the geese began to migrate north.

At this time, magpies can be seen everywhere in the north, and they can feel the yang and start building nests; The third time, the word "pheasant" means singing. When the pheasant approaches April 9, it will feel the growth of Yang and sing.

Climatic characteristics of slight cold solar terms;

The cooling process of cold air is frequent in the slight cold season, but few of them reach the cold wave standard. As the saying goes, "cold is in Sanjiu", and Sanjiu is mostly 65438+10.9 to/kloc-0.7, which is also within the slight cold solar terms. But this is just a general rule. In a few years, a bad cold may be colder than a mild one. 1975 In the winter, the solar term with the lowest temperature was actually heavy snow.

In the north, such as Beijing, the average temperature of slight cold is generally around -5℃, and the extreme minimum temperature is below-15℃.

In Northeast China, the average temperature at this time is around -30℃, the extreme minimum temperature can be as low as -50℃, and the average maximum temperature in the afternoon is only -20℃. It's really a world of ice sculptures and jade carvings.