Climatic characteristics of the first frost —— What are the weather characteristics of the first frost solar term in 2022?

The first frost actually means that autumn is coming and winter is coming, so the weather characteristics at this time are also of great concern to everyone. So what are the weather characteristics of the first frost solar terms, and what is the beautiful implication of the first frost? Then let's get to know each other with Bian Xiao ~

What are the weather characteristics of frost solar terms in early 2022?

Frost is the condensation of water vapor when the ground encounters cold weather, so it is not the frost in the first frost, but the phenomenon that the ground will produce the first frost when the weather is cold. From a scientific point of view, the saying that "dew becomes frost" is not accurate. The frozen dew formed by dew freezing is hard small ice beads. Frost refers to the phenomenon of crop freezing injury caused by the sudden drop of temperature, and its harmful temperature varies with crops, varieties and growth periods.

To form frost, the temperature of the ground or ground objects must drop below 0℃, and the water vapor content in the air on the ground should reach a certain level. Therefore, there may not be frost in first frost, and there may not be frost in first frost. However, due to the low temperature during frost, if the temperature continues to drop, it will easily lead to frost.

Climatic characteristics of the first frost.

Northwest, Northeast and other places: weather characteristics in early winter.

From the late period of 10 to the early period of10, the northwest and northeast regions of China have already presented the scene of cold wind and falling leaves in early winter. 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.

Southwest China and other places: began to enter a period of little rain.

From 1 1, the autumn rain in West China basically ended and entered a period of little rain in a year. 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.

The beautiful meaning of the first frost

The first frost is the last solar term in autumn among the 24 solar terms, which means that the weather is getting colder and the first frost appears, which also means the beginning of winter. The first frost season is an important node of health care. There is a folk proverb that "it is better to make up the first frost once a year", which shows that this solar term has a great influence on people.

The poem says: "Frost leaves are redder than February flowers". After the first frost, maple, cotinus coggygria and other trees all over the mountains began to turn red and yellow, which was very spectacular. When going out to climb mountains and enjoy the beautiful scenery, you must keep warm, especially protect your knees and don't exercise too much. When the knee joint encounters cold stimulation, blood vessels contract and blood circulation becomes worse, which will lead to pain. Therefore, pay attention to keep warm in cold weather and wear knee pads when necessary.

Late autumn is also a period of high incidence of respiratory diseases. It is advisable to eat more foods with the functions of promoting fluid production, moistening lung and relieving cough, such as pears, apples, ginkgo, onions, mustard greens and radishes. In addition, rubbing Xiang Ying points on both sides of the nose will help us to prevent respiratory diseases.