Briefly understand the characteristics of the frost solar term

Briefly understand the characteristics of the frost solar term. Frost is the last solar term in autumn and the beginning of winter. When frost comes, there will be a large temperature difference between day and night. Dryness is obvious. Below I will share an article about simply understanding the characteristics of frost solar term. Briefly understand the characteristics of frost solar term 1

Characteristics of frost 1:

The main climate characteristics of autumn are dryness and the temperature gradually turns colder. After the frost, the temperature difference between day and night is greater. It is very cold in the morning and evening, but hot at noon. Autumn dryness is obvious. After the frost, the plants gradually lost their vitality and the earth became desolate.

Characteristics of Frost Descent 2:

After frost Descent, the temperature difference between day and night is greater. It is very cold in the morning and evening, and relatively hot at noon. Autumn dryness is obvious. After the frost, the plants gradually lost their vitality and the earth became desolate.

Frost Characteristics 3:

In southern regions with latitudes, the average temperature is around 16°C, and there are still three solar terms left before the first frost date. During the frost season, the cool autumn wind has blown into the flower city of Guangzhou. The average temperature in northern Northeast China, eastern Inner Mongolia and most of northwest China is already below 0℃.

How much do you know about the Frost Festival?

Frost's Descent is one of the twenty-four solar terms. In ancient times, solar terms were divided by "pointing of the handle of the bucket". When the handle of the Big Dipper points to the Xu position (northwest), it is the frost solar term.

From the Han Dynasty to the end of the Ming Dynasty, the solar terms were divided by the "Pingqi method" (time average method), and the winter solstice was determined by measuring the sun's shadow with a standard watch. Starting from the winter solstice, the interval between each solar term was about 15 days. , frost falls about 300 days after the winter solstice.

From the early Qing Dynasty (1645) to the present, the solar terms have been divided by the "Qi-fixing method". When the sun reaches 210 degrees of ecliptic longitude, it is the frost solar term. After the frost, the weather will be colder in the morning and evening, hotter at noon, and autumn dryness will be obvious.

The "Frost Descent" solar term reflects the large temperature difference between day and night and the gradual cooling of the weather. It does not mean that "frost will fall" when entering this solar term.

In fact, "frost" does not fall from the sky. "Frost" is caused by the condensation of water vapor on the ground when it encounters cold air due to changes in temperature.

Since frost is a sign of cold weather and a large temperature difference between day and night, this season is named after "Frost Descent", which means a sudden drop in temperature and a large temperature difference between day and night.

The frost season is the transition of Yang Qi from receiving to hiding. As the saying goes, "Frost kills all the grass." After the frost, the plants gradually lose their vitality and the earth becomes desolate.

The ancient book "Explanation of the Twenty-Four Solar Terms" says: "When the air is cold and frost falls, the yin begins to condense." It can be seen that "frost falls" means that the weather gradually becomes colder and the yin begins to condense. After the frost solar term, cold air often invades, causing the temperature to drop sharply. The temperature difference between day and night changes greatly, and it is obviously colder in the morning and evening. "The most obvious thing about the frost solar term is that the temperature difference between day and night changes greatly. A brief understanding of the characteristics of the frost solar term 2

Characteristics of the frost solar term: Frost is the condensation of water vapor on the ground when it encounters cold weather, so frost is not frost, but frost. It means that the weather is cold and the ground will produce the first frost. From a scientific point of view, the saying that "dew turns into frost" is not accurate. Frost refers to the phenomenon of freezing damage to crops caused by a sharp drop in temperature. The damage temperature varies depending on the crop, variety and growth period.

To form frost, the temperature of the ground or ground objects must drop. to below 0℃, and the water vapor content in the air in the ground layer must reach a certain level. Therefore, frost does not necessarily occur when frost occurs, and frost does not necessarily occur when frost occurs. However, because the temperature when frost occurs is already relatively high. If it continues to cool, it will easily lead to frost.

1. Southwest and other places: Starting from November, the autumn rain in West China has basically ended, and it has entered the driest period of the year. Period. Some areas in the southwest are located in plateaus, and some are located in basins and hills, so the weather will naturally be somewhat different. But in general, the average temperature at this time has not reached winter standards, that is, it is not as humid as summer. Spring is dry, and the temperature difference between morning and evening is not as obvious as in spring. It should be said that the weather in the Sichuan Basin is mild during this period, and the fields are green and orange. Su Shi, a great writer in the Northern Song Dynasty, wrote in a poem. : "Thousands of trees have turned yellow, only the hibiscus is fragrant."

The trees and hibiscus are in full bloom, making the rich "Tianfu" more beautiful.

2. Northwest, Northeast and other places: The weather characteristics of early winter are from late October to early November. The northwest, northeast and other regions of my country have already shown a cold wind and fallen leaves. In the early winter scene, cold air is not only a frequent visitor in these areas, but also the first guest received. Generally, cold air brings either dry wind or rain and snow to the places it passes, and cooling is a specialty that every batch of cold air brings. Since my country has entered a warmer cycle 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 below -10℃, and the cold wind and snowflakes dance together, making it very cold. In a few cases, localized heavy snow can easily cause snow disasters, and northerly winds in the northern sea area are also worth noting.

Cold air is not without its advantages. Whenever the cold air passes, the sky is clear, the air is fresh, and the sun is bright. Some people call cold air the cleaner of urban air pollution, and this reputation is truly worthy of its name. In places with high humidity such as lakeside areas, forest areas, and valleys, people can sometimes witness the exquisite, white and elegant rime with their own eyes. Briefly understand the characteristics of the frost solar term 3

Some small customs of the frost

1. Once there is frost and clear weather, it will not be long, and there will be frost and clear weather for three dynasties. The phrase "clear for a long time" means: if there is frost in one morning, the weather will not be sunny for long; if there is frost in three mornings, the sunny period will last longer. "Once there is frost, it will clear up soon", which means that the cold air is not very strong, the temperature is not very low, and it is easy to move away, so it can only form one day of frost. After the cold air (weak high pressure) moves away, the local area will be controlled by low pressure, and the weather will turn bad. On the contrary, if there are frosts for several nights in a row, it means that the cold high pressure force is strong, has a large range, moves slowly and is relatively stable, and can generally last for several days or even a week. This is what "there are frosts in three dynasties and sunny days for a long time" means.

2. When there is frost, the sky will be sunny, and when the frost is red, the sun will be red. "When frost is back, the sky will be sunny, and when the frost is red, the sun will be exposed" means: when there is frost, it is usually sunny. Places under the control of cold high pressure from the north have a lot of downdrafts, so the sky is clear and the moon is clear at night, and the sky is cloudless. The weather will be fine the next day.

Frost-descent solar term health preservation

In northern my country, during the frost-descent season, water vapor in the air encounters water vapor on the ground when the temperature drops at night. Objects will adhere to their surfaces and condense into frost. In the early morning before the sun comes out, we can often see rime wrapped on dry branches. This is nature's reminder to us that winter is coming. In southern my country, this solar term is followed by the busy period of autumn harvest and autumn planting. The farmer's proverb "when frost comes, the warehouse is full of rice and grain" reflects the importance that working people attach to this solar term.