Slight cold and severe cold are both winter solar terms. Which is colder, slight cold or severe cold?

Lead: It's the Great Cold Solar Term soon. From its meaning, the Great Cold is the coldest time of the year. However, people in some places have said, why do we feel that the slight cold solar terms here are colder? As we know, slight cold and severe cold are both solar terms in winter, so they are relatively cold. But in contrast, which is colder in most cases? Is it a slight cold or a severe cold? Let's get to know each other.

Slight cold and severe cold are both winter solar terms, which is colder in most cases?

Slight cold period. According to meteorological data for many years, slight cold is basically the lowest temperature day in a year. March 9 is the coldest time in the slight cold solar terms, and there is also a saying among the people that "slight cold is better than great cold". However, climate experts believe that there are many factors that affect whether a place is cold or not, and whether a certain year or a certain area is cold or not needs specific analysis.

Slight cold climate characteristics:

The temperature in the whole country has dropped sharply.

When the sun meridian reaches 285 degrees, the slight cold solar term begins. Cold means cold, and slight cold means the degree of cold.

The coldest area in the middle of winter in China is the northern part of Heilongjiang, and the lowest temperature can reach about MINUS 40℃. It's freezing, dripping into ice.

The average temperature during the slight cold in Beijing is generally around -5℃, and the extreme minimum temperature is below-15℃. At this time, the average temperature in Northeast China is around -30℃, the extreme minimum temperature can be as low as -50℃, and the average maximum temperature in the afternoon is only -20℃. The average temperature in the area north of 45 N in Heilongjiang, Inner Mongolia and Xinjiang and the northern part of Qinghai-Tibet Plateau is around -20℃, and the average temperature in the area near 40 N in the west of Hetao is around-10℃. The average temperature along the Huaihe River in Qinling Mountains is about 0℃, and there is no seasonal frozen soil in the south of this line, and there is no obvious wintering period for winter crops. At this time, the average temperature in the south of the Yangtze River is generally around 5℃. Although the field is still full of vitality, cold air sometimes goes south, causing certain harm.

There is often freezing in the south.

In the south of China, winter is very warm. The middle of winter is 1 month, with frost and snow attacking and often freezing. The lowest temperature is about-10℃. The lowest temperature in northern South China is rarely below MINUS 5℃, and the low temperature below 0℃ in southern South China is even rarer.

The lowest temperature in winter in the south is not low, which is beneficial to production and is also suitable for developing diversified businesses. Citrus "was born in the south" generally requires a minimum temperature of not less than minus 5℃ and an annual temperature higher than 15℃, which can be met in most parts of South China and almost all subtropical plants. Only in this way, the unique climatic conditions should be a very important factor.

The low-altitude valley is the warmest place in the middle of winter in most parts of southern China. The average temperature in 65438+ 10 is around 12℃, and only a few teenagers may have a low temperature below 0℃. In addition, the inversion effect is very significant, so tropical fruits such as bananas and mangoes can grow well.

Cold climate characteristics

1, large-scale rain and snow weather and strong wind cooling

During the severe cold and solar terms, the atmospheric circulation is relatively stable and hungry, and the circulation adjustment period is about 20 days. When this circulation is adjusted, there will often be a wide range of rain and snow weather and strong winds to cool down. When the west of 80 degrees east longitude is a long wave ridge and East Asia is a coastal trough, under the influence of the northwest wind and the continuously supplemented cold air, China will have a sustained low temperature. In some parts of China, severe cold is not as good as slight cold, but in some years and a few coastal areas, the annual minimum temperature will still appear in the severe cold solar terms. Therefore, during this period, we should continue to do a good job in cold protection of crops, especially pay attention to protecting livestock from wintering.

It rains the least in a year.

In the severe cold season, the average temperature in most parts of southern China is 6℃ to 8℃, which is nearly 65438 0℃ higher than slight cold. The proverb "slight cold and cold, cold into a ball" shows that the great cold solar terms are also the cold period of the year. Slight cold and severe cold are the periods with the least rainfall in a year, and all the year round is a severe cold solar term. The rainfall in most parts of the south is only slightly higher than that in the previous period, with 5 ~10mm in most parts of the south and only1~ 5mm in the mountainous areas of the northwest plateau.

3. Frequent cold waves

During the great cold, the cold wave moves southward very frequently, which is quite cold in most parts of China in a year. Railway, post and telecommunications, petroleum, shipping and other departments should pay special attention to take measures as soon as possible to prevent severe weather such as strong winds and heavy snow. Agriculture should strengthen the cold and antifreeze of livestock and wintering crops.