What are the characteristics of the first frost? What is the first frost?
What are the characteristics of the first frost?
1. Characteristics of meteorological changes: During the first frost, it is generally from the end of June 10 to the beginning of June10. As dry and cold air gradually dominate the whole country, warm and humid air is marginalized, and many weather with summer and early autumn characteristics exits, making the weather relatively simple. Before and after beginning of winter, there were often strong winds and cool weather, and some places entered winter in a short time.
2. Phenological characteristics: The ancients in China divided the first frost into three stages: first, the jackal sacrificed animals; Second, the vegetation is yellow; Three stings are salty. At this time, jackals and other animals began to catch prey for the winter; The leaves are all yellow and falling; Hibernating animals also hide in caves and go into hibernation without food.
What is the first frost?
The first frost is the eighteenth of the twenty-four solar terms, which means that the weather is getting cold and first frost begins. At the end of September each year (1October 23rd or 24th 10), the first frost is regarded as the last solar term in autumn when the sun reaches 2 10. "Twenty-four solar terms" said: "In mid-September, the gas is cold and condensed, and the dew is like frost." At this time, when the temperature drops below 0 degrees, the water vapor in the air condenses into white crystals on the ground, which is called frost. The first frost refers to the first frost. Plants that are not hardy will stop growing and present a scene of late autumn, which is a good time to enjoy maple leaves.
The first cream health essentials daily life health.
The temperature difference between day and night of the first frost increases, so people should do a good job of keeping warm. In addition to adding clothes in time, we should pay special attention to the warmth of our waist and legs. Because the waist of the human body supports the whole upper body and bears half the weight of the body, it is not only one of the most complicated and active parts, but also the most vulnerable part when carrying weight or exercising. During the first frost, the temperature dropped obviously, and pathogenic wind, cold and dampness invaded the waist, resulting in obstruction of the waist meridians, poor qi and blood, backache and backache. The knee joint of the leg is also one of the parts vulnerable to cold evil. What we usually call "old cold legs" is closely related to feeling cold evil. Because the first frost weather is getting colder and colder, the elderly are prone to this disease. Because the knee joint is the largest joint in the human body, it bears almost the weight of the whole body, with heavy burden and large activity, and the articular cartilage is easy to wear and tear.