What are the origin and climate characteristics of the first frost solar terms?

As the saying goes, "The frost has changed before the cold dew is cold". With the arrival of the cold dew season of the twenty-four solar terms, the autumn wind is rustling and the chill invades people. Red leaves fall frost, frost night. How did the distinctive first frost solar terms come from? What will be its climate characteristics? Below, let Bian Xiao take everyone to find out and take a look together.

The origin and climatic characteristics of the first frost solar terms

The origin of the first frost is the first frost in the twenty-four solar terms when the sun reaches 2 10 degrees on the 23rd of Gregorian calendar +00. The first frost is the last solar term in autumn, which is the transition from autumn to winter. There is a lot of heat dissipation on the ground in autumn, and the temperature suddenly drops below 0 degrees. Water vapor in the air directly condenses on the ground or plants to form fine ice needles, and some become hexagonal frost flowers, which are white and loose in structure.

"Twenty-four solar terms" said that the first frost: in mid-September, the gas was cold and condensed, and the dew became frost. At this time, frost has appeared in the Yellow River Basin of China, and a piece of silver ice crystals is shining in the fields thousands of miles away. At this time, the leaves turned yellow and fell. The ancient book "Twenty-four solar terms" said: "Qi stagnates at the beginning of frost, and Yin begins to coagulate". It can be seen that the "first frost" means that the weather is getting colder and the dew condenses into frost. In ancient China, the first frost was divided into three stages: first, the jackal sacrificed animals; Second, the vegetation is yellow; Three stings are salty. The jackal began to catch prey, sacrifice animals, and sacrifice to heaven to repay the kindness of animals, paving the way for sacrificing autumn gold; The leaves on the earth turned yellow and fell; The stinging insects are motionless in the cave and hang their heads into hibernation.

Climatic characteristics of the first frost. Southwest China and other places: it began to enter the dry season, starting from 1 1, the autumn rain in West China basically ended, and then it entered the dry season all year round. Some southwest areas are located in plateaus, some in basins and hills, and the weather will naturally be different. But in general, the average temperature at this time has not reached the standard of winter, that is, it is not as humid as summer, nor as dry as spring, and the temperature difference between morning and evening is not as obvious as spring. It should be said that it is a more comfortable time of the year. Sichuan basin, during this period, the climate is mild, and the fields are green and orange. Su Shi, a great writer in the Northern Song Dynasty, said in a poem: "Thousands of trees are yellow, and only Furong is alone." Trees and hibiscus are in full bloom, making the rich "Tianfu" more gorgeous.

2. Northwest China, Northeast China and other places: Weather characteristics in early winter: from late June to early October 10/0/0/0/0. Northwest, northeast and other places show the early winter scene of cold wind and falling leaves. Cold air is not only a frequent visitor, but also the first guest received in these areas. Generally, cold air is either dry wind or rain and snow, and cooling is a specialty that every batch of cold air should send. Since China has entered a warmer period since the mid-1980s, extremely strong cold air is rare. However, when encountering strong cold air, the minimum temperature drops to -7, -8℃, or even lower than-10℃, and the cold wind dances with snowflakes, which also makes people feel cold. In a few cases, local heavy snow is easy to form a blizzard, and the northerly wind in the northern sea area is also worthy of attention. Cold air is not useless. Whenever it passes by, the sky is clear, the air is fresh and the sun is shining. Some people call cold air a cleaner of urban air pollution, which is really worthy of the name. In lakes, forest areas, valleys and other places with high humidity, people can sometimes witness the exquisite, white and elegant rime figure with their own eyes. You may also like: What fruit can you eat for health in the first frost? The Origin and Climatic Characteristics of Grain Rain's Autumn Equinox Solar Terms: What to eat for health in the autumn equinox? What is the first frost? 20 14 first frost date?

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