Explain the 24 solar terms, thank you.

The twenty-four solar terms are defined according to the position of the earth in the orbit around the sun and belong to the solar calendar. The earth revolves around the sun for 360 degrees, which is 0 degrees at the vernal equinox and 15 degrees at Qingming. After that, every 15 degree is a solar term, and its date is basically fixed in the solar calendar. Twenty-four solar terms are the originality of China's calendar method and one of the brilliant achievements of China's ancient science and culture. Twenty-four solar terms originated in the Yellow River Basin. As early as the Spring and Autumn Period, four solar terms were set, namely, mid-spring, mid-summer, mid-autumn and mid-winter.

Twenty-four solar terms are traditional folk festivals in China. As early as the Zhou Dynasty and the Spring and Autumn Period, the summer solstice, winter solstice, vernal equinox and autumn equinox were determined by measuring the sun shadow with soil gauge. Twenty-four solar terms mean dividing a year into twenty-four equal parts and giving each equal part a name. This is the origin of twenty-four solar terms. The names and order are: beginning of spring, Rain, Sting, Vernal Equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoxia, Daxia, beginning of autumn, Chushu, Bailu, Autumn Equinox, Cold Dew, First Frost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold and Severe Cold. Each solar term is about half a month apart and divided into twelve months. The beginning of the month is called the solar term, and the middle of the month is called "Zhongqi". The so-called "qi" refers to meteorology and climate. Twenty-four solar terms are closely related to season, temperature, precipitation and phenology. Beginning of spring, Changxia, beginning of autumn and beginning of winter indicate the beginning of spring, summer, autumn and winter respectively, and the vernal equinox, autumnal equinox, summer solstice and winter solstice are the turning points of the season. The five solar terms of slight summer heat, great summer heat, summer heat, slight cold and great cold are the hottest and coldest periods; White dew, cold dew and first frost indicate that there is water vapor condensation in the lower atmosphere; It also reflects the degree of temperature drop. Rain, Grain Rain, light snow and heavy snow reflect the situation and degree of precipitation; Spine, clear, small full and awn grass are the characteristics of reactant climate and crop growth.

Twenty-four solar terms reflect the apparent movement of the sun in one year, so the dates of solar terms are basically fixed in the current Gregorian calendar, with the first half of the year being 6 days and 2 1, and the second half being 8 days and 23 days, with a difference of 1 ~ 2 days.

1. beginning of spring

Every year (February 3rd to 5th), when the sun reaches longitude 3 15, it is the solar term in beginning of spring. Beginning of spring is the first of the 24 solar terms 1. Beginning of spring means entering spring. After beginning of spring, the cold gradually disappeared, the temperature rose and the rainfall increased. It is really called spring breeze, rain and everything. The climatological standard in spring is that the average temperature in five days should reach 10℃.

China has a vast territory and complex terrain, and the climate varies greatly from place to place. So the start time of spring varies from place to place. For example, spring in Guangzhou begins in February, spring in Beijing begins in April, and spring in Jianghuai area generally begins around mid-March.

There are many weather proverbs about beginning of spring, such as "It's sunny in beginning of spring, even if it rains", "The Spring Festival begins with thunder and the rain never stops" and so on.

rain

Every year (February 18~20), when the sun reaches 330 degrees of the yellow meridian, it is a rain solar term. Rain is the second of the 24 solar terms. The rainy season is at the end of winter and the beginning of spring, when the east wind thaws, the ice and snow melt into water, the weather gets warmer and the precipitation increases, hence the name Rain Solar Term.

This means that the temperature will get warmer. Since then, the snow has stopped raining in most areas of China, and the rainfall has gradually increased.

In rainy season, the weather is changeable, sometimes cold and sometimes hot, sometimes warm and sometimes cold. Such climatic conditions are very harmful to crops that have sprouted and returned to spring and to people's health. Remind people to pay attention to health care and prevent some diseases.

shock

Every year (March 5 ~7), when the sun reaches 345, it is the third of the 24 solar terms. Stinging means that the weather is getting warmer, the rain is increasing, the spring thunder is blowing hard, and everything is surprised. Animals that were dormant and hibernating underground gradually woke up and began to be unearthed. At this time, the average daily temperature in the Jianghuai area will generally rise to above 5 degrees, and spring ploughing will kick off, reminding farmers and friends to seize the favorable weather opportunity and arrange field farming.

At the beginning of thunder, the temperature and ground temperature gradually increased, the land thawed, spring ploughing began, and hibernating animals dormant in the ground began to wake up and unearthed.

In addition, cold and warm air alternate frequently, and cold and warm weather is the characteristic of solar term weather, which is easy to cause colds, reminding people not to rush to reduce winter clothes and ensure good health.

4. vernal equinox

Every year (March 20~22), when the sun reaches 360, it is the vernal equinox, which is the fourth of the 24 solar terms. As the saying goes, "the vernal equinox and the autumnal equinox are equally divided day and night." At this time, the sun shines directly on the equator of the earth, and the solar heat obtained by the northern and southern hemispheres is the same, and the day and night time are the same. The difference is that it is spring in the northern hemisphere and autumn in the southern hemisphere.

Divide means divide equally. The vernal equinox and the autumnal equinox, collectively known as the equinox in ancient times, are equal seasons of day and night, which is the middle of spring and autumn. On this day, the sun shines directly on the equator, and it is as long as day and night everywhere, which can also be understood as half of 90 days of spring.

After the vernal equinox, the direct point of the sun will continue to move northward, and the solar radiation we get in the northern hemisphere will gradually increase, and the weather will get warmer day by day. At the same time, the days get longer and the nights get shorter.

5. Qingming

Every year (April 4~6), when the sun reaches the yellow path 15, it begins to be Qingming, which is the fifth of the 24 solar terms. The first day of this solar term is Tomb-Sweeping Day. The climate is warm, the spring is bright, the vegetation is budding, the weather is sunny, and everything is thriving.

In ancient times, there was a custom of going for an outing to sweep graves. "seventy-two episodes of the moon order": "March Festival ... everything is clean and clear at this time." By Qingming, the average humidity in the middle and lower reaches of the Yellow River and its south area was generally above 10 degrees Celsius. The warm climate and lush vegetation in most parts of China have changed the cold and yellow scene in winter. In agricultural production. Busy with spring ploughing and sowing. Jiangnan agricultural proverb: "Qingming Grain Rain is connected, and it does not delay seed soaking"; "Planting trees. Not very clear. "

6. Grain Rain

Every year (1April 9 ~ February1April 2008), when the sun reaches 30 degrees of the ecliptic, it is a solar term in Grain Rain, and Grain Rain is the sixth of the 24 solar terms. It means "Rain gives birth to a hundred grains", and the rainfall increases significantly in rainy season, because with rain, grains can grow. After Grain Rain, the weather turned warmer and the temperature rose quickly. As the saying goes, "Snow breaks in Qingming Festival and frost breaks in Grain Rain". The daily average temperature in Jianghuai area is above 16 degrees, and the frost and snow phenomenon basically stops. "When there are many kinds of trees in Qingming, Grain Rain will plant land", "When it is Qingming early, the harvest will be late, and cotton will be planted in Grain Rain". All localities are in the busy farming season of planting beans, cotton, transplanting rice seedlings and picking tea, so we should seize the favorable opportunity and arrange farm work in the field reasonably.

7. Long summer

Every year (May 5 ~7), when the sun reaches 45 degrees of the Yellow Meridian, it is the long summer solar term, and the long summer is the seventh of the 24 solar terms. As the name implies, long summer refers to the beginning of summer. However, the temperature varies from place to place, and the time of entering summer is actually inconsistent.

After this solar term, the hot weather will come and the temperature will rise obviously. Agricultural activities have entered a busy summer. In this season, the temperature and precipitation increase greatly, and the phenological characteristics are obvious.

8. Xiaoman

Every year (May 20~22), when the sun reaches 60 degrees of the Yellow Meridian, it is called Xiaoman solar term, and Xiaoman is the eighth of the 24 solar terms. Xiao Man means that at this time, the plants in nature are full and lush, and the grains of wheat are gradually full, but it is not the most full time.

In Xiaoman season, the average temperature in Jianghuai area is generally higher than 22℃, which is a scene of midsummer. Farming activities are about to enter the busy farming season, and summer harvest crops are mature or close to maturity; Spring sowing crops grow vigorously; The autumn harvest crops will be sown soon. Early rice should be baked in time, cotton fields should be cultivated and loosened, orchards should be watered, and wheat should be protected from dry and hot winds. Season waits for no man, I hope farmers can arrange production scientifically.

9. Miscanthus

Every year (June 5~7), when the sun reaches 75 degrees of the yellow meridian, it is the Miscanthus solar term, and Miscanthus is the ninth of the 24 solar terms. "awn" means that crops with awns such as wheat mature and start harvesting; "Planting" refers to the sowing of millet crops. For the Jianghuai area, the awning season is the busiest season for agricultural production. Summer grain should be harvested, autumn grain should be sown and spring grain should be managed. It can really be said that everything is busy.

The awn represents some crops with awns, and the awn species represents the maturity of crops with awns such as wheat and barley (species refers to seeds). Or indicate the busiest season for planting crops such as late rice, millet and millet.

However, in the Jianghuai area, the awning season is often the most complicated time for weather changes. As the saying goes, "Spring competes for the sun, and summer competes for the time", which is to remind people to pay more attention to the weather changes at this time, arrange production reasonably, and don't let mature grain suffer losses.

10. Summer solstice

Every year (June 2 1~22), when the sun reaches 90 degrees of the yellow meridian, it is the summer solstice, and the summer solstice is the 10 of the 24 solar terms. To, it means extreme, that is to say, the sun grows to the extreme. On the summer solstice, the height of the sun is the longest, and the sun shines almost directly on the tropic of cancer. In the northern hemisphere, the days are the longest and the nights are the shortest, and the weather begins to get hot. From summer to the future, the direct sunlight position gradually moves southward, and the daytime begins to shorten day by day. The southern hemisphere is the opposite.

Astronomy stipulates that summer solstice is the beginning of summer in the northern hemisphere, and climatology takes the beginning day when the average temperature is higher than 22℃ every five days as the beginning of summer. After the summer solstice, the temperature in the north is high, the sunshine is sufficient, and the rain increases, which is beneficial to the growth and development of crops. The middle and lower reaches of the Yangtze River are still in the rainy season, and there are often long-lasting and heavy rainfall, which causes floods and even threatens people's lives and property. Attention should be paid to strengthening flood control. But sometimes in abnormal years, the weather is hot from summer to Sunday, indicating that the weather is dry and hot in the later period.

1 1. Xiao Shu

Every year (July 6th ~ 8th), when the sun reaches longitude 105, it begins to be light summer, which is 1 1 solar term among the 24 solar terms. "Summer heat" means heat. Slight summer heat is a solar term reflecting the heat degree in summer.

Hot in summer means hot. The summer heat rises during the summer heat, but it has not reached the hottest time. At this time, the summer heat is rising and the climate is hot, but it is not hot enough. People often say that it is hot in dog days. In summer, although the Jianghuai area has not yet entered the dog days, it is not far away. Remind the public to pay special attention to heatstroke prevention and cooling.

12. Summer heat

Every year (July 22-24), when the sun reaches longitude 120, it begins with summer, which is 12 of the 24 solar terms. The hot summer is the hottest season in a year, especially in Jianghuai area, where the sun is like fire, Wan Li is cloudless, the wind speed is low, the humidity is high, the daytime is hot and transpiration, the night is sultry and sleepless, and the highest temperature in the afternoon is often above 35℃, reminding people to pay attention to heatstroke prevention and cooling.

In addition, during this period, due to sunny and hot weather and large evaporation, summer drought is prone to occur, resulting in crop water shortage. For mid-season rice that is flowering at booting stage, topdressing and shallow water irrigation should be done in time to prevent drought, and double-season late rice should be transplanted in time.

13. beginning of autumn

Every year (August 7-9), when the sun reaches longitude 135, beginning of autumn and beginning of autumn are 13 of the 24 solar terms. "Autumn" refers to the summer heat to cool down, which means the beginning of autumn, the autumn is crisp, and the autumn with bright moon and cool breeze begins. But in early autumn, the weather in Jianghuai area is still very hot.

According to the standard of dividing seasons according to the average temperature, it must be that the average temperature for five days is below 22℃ to be considered as autumn. According to this standard, the Jianghuai area generally enters autumn in the middle and late September. After beginning of autumn, although the summer heat is hard to disappear for a while, there is still the afterglow of "autumn tiger", but the general trend is that the weather is getting colder and colder. The daily temperature range is gradually obvious, which is often very hot during the day and very cold at night. Autumn actually means that the crops are about to mature.

14. Summer vacation

Every year (August 22-24), when the sun reaches longitude 150, the summer heat begins, which is 14 of the 24 solar terms. "Out" means going. In summer, the heat stops here, that is, in summer, the hot summer will pass, the temperature will gradually drop, and the rainfall will gradually decrease.

But this is just a general rule. In the Jianghuai area, the difference is bigger year by year. In some years, the weather during the hot summer is even hotter than that in summer, such as 1959 1967. The highest temperature before and after the hot summer reaches 39~4 1℃, forming the so-called "autumn tiger" weather. Because of this, it is necessary to remind people to pay attention to heatstroke prevention at this time, and at the same time, the temperature difference between day and night is gradually increasing, and clothes and quilts should be added in time sooner or later. In addition, around summer is the busy season of autumn sowing, so arrange field farming in time.

15. Millennium

Every year (September 7~9), when the sun reaches longitude 165, the Millennium begins. Millennium is the15th solar term among the 24 solar terms, which means that the temperature is getting colder and the dew can be seen on the vegetation in the morning. As the saying goes, "A thousand years are divided into autumn nights, and one night is cold." . Before and after the Millennium Festival, the temperature gradually decreased, the summer monsoon was gradually replaced by the winter monsoon, and the northerly wind blew more, and the weather gradually turned cold. Warm during the day and cold at night, it is easier to reach the condition of condensation, so it is getting heavier and heavier and white, so it is called Bailu.

16. vernal equinox

Every year (September 22~24), when the sun reaches longitude 180, it is the autumnal equinox solar term. It is the16th solar term among the 24 solar terms. The "autumnal equinox" means that on this day of the autumnal equinox, the sun shines directly on the equator, and the length of day and night is almost equal, and the day and night are 12 hours respectively. After the autumnal equinox, the direct sunlight crossed the equator and moved to the southern hemisphere. The northern hemisphere gets less and less solar radiation and the temperature drops gradually. The average daily temperature in the Yangtze River basin and its vast area to the north drops below 22℃, and it enters a cool autumn. The cold air mass in the north continues to strengthen and activities begin to be frequent. The warm air that originally occupied the mainland quickly withdrew southward and was filled by the cold air in the north.

At the autumnal equinox, the autumn rain period has basically ended, and the rainfall in most parts of China has decreased significantly. The average precipitation in the middle and lower reaches of the Yangtze River is about 20 mm, which is half or even two-thirds less than that in the middle. The average annual rainfall in Shanghai in late September is 18.3 mm, which is 49.9 mm less than that in mid-September, and the "autumn dry" climate begins to appear. Therefore, it is necessary to prevent autumn dryness at this time.

After the autumnal equinox, the autumn is crisp and the crabs are fat and yellow, which is a beautiful and pleasant season; The autumnal equinox is also an important season for agricultural production, when cotton bolls and late rice begin to mature.

Cold Dew

Every year (65438+1October 8~9), when the sun reaches longitude 195, it is a cold dew solar term. It is the17th solar term among the 24 solar terms. The book "Twenty-four Solar Terms" says that "in September and a half, the dew will be cold and the dew will be condensed". It means that the temperature is already very low, the dew is getting thicker and thicker, and the vegetation is withered. At this time, the dew is cold and will freeze, which is the season when the climate gradually turns cold.

"Cold dew" means that the temperature at this time is lower than that at the Millennium solar terms, and the original white and crystal dew on the ground is about to condense into frost.

"Cold dew first frost festival, tight wind for snow". In the cold dew season, Nanling and the vast areas in northern China have entered autumn, and the northeast and northwest regions have entered or are about to enter winter. At this time, the influence of cold air in the north has been strengthened and it has been invading the south. In some years, the cold air is particularly strong, which makes the temperature in the south of the Yangtze River drop below 16℃, forming a "cold dew wind", which is very harmful to the double-cropping late rice in the south, resulting in empty grain and a substantial reduction in grain production. Therefore, we should always pay attention to listening to the weather forecast to prevent the harm of "cold dew wind"

After the cold dew, most parts of China are under the control of cold and high pressure, and the rainy season is over. The weather tends to be warm during the day and cool at night, and the sky is clear in Wan Li, which is very beneficial to the autumn harvest. Therefore, at this time, we must seize the sunny weather to harvest cotton and achieve a bumper harvest.

18. First frost

Every year (around 654381October 23-24), the first frost begins when the sun reaches the longitude of 2 10, which is 18 of the 24 solar terms. Frost falling is a solar term, which means that the temperature drops and the water vapor near the surface freezes into frost. The book "Seventy-two Days of the Month" said: "In mid-September, the gas stagnated and the dew became frost." It can be seen that falling frost means starting to see frost. "After autumn, the north wind is tight and there is frost at night." In the first frost season, the temperature dropped relatively low. At this time, as long as there is strong cold air in the north and south, the temperature will drop sharply. When the surface temperature drops to 0℃ or below, the water vapor in the air attached to the stratum will reach saturation, condense into tiny ice crystals and form frost. China has a vast territory, and the climate varies greatly from place to place. "first frost comes first" reflects the climate characteristics of the Yellow River Basin. Heilongjiang and Inner Mongolia in the north entered the first frost period in the middle and late September, and the first frost appeared in 65438+February south of Nanling. The first frost in Shanghai usually occurs in the middle of 1 1 year, and the early frost occurs in the late of 1 year, and the final frost usually lasts until the late March of the following year. The appearance of frost shows that the minimum ground temperature has dropped below 0℃, which will have a certain impact on crops. The earlier frost appears, the greater the harm to crops, because plants can not only absorb external water, but also freeze their own water into ice, which will cause crops to suffer from freezing damage.

Frost is the condensation of water vapor on the ground when it meets cold weather. So it's not the frost in the first frost, but it means that the weather is cold and the earth will have the first frost.

During the first frost season, most areas in China are in drought, the precipitation is obviously reduced, and the air is relatively dry, which is easy to cause fires. Therefore, we should attach great importance to fire prevention.

"If you don't cut grain in the first frost, you will lose one reed a day." In the first frost season, when the late rice is ripe, it is necessary to pay close attention to harvesting, otherwise the grain yield will be reduced due to bird damage and grain falling.

19. beginning of winter

Every year (165438+1October 7~8), when the sun reaches 225 in beginning of winter, the solar term is beginning of winter. It's the 19 of the 24 solar terms. Beginning of winter is one of the solar terms reflecting seasonal changes, and the folk custom in China is that beginning of winter is the beginning of winter. The book "The Seventy-two Phases of the Moon" says: "The beginning also stands" and "the winter also ends, and everything is harvested". In fact, China is a vast country, and winter doesn't always start at the same time. According to the standard of dividing four seasons by climatology, if the average climate temperature is lower than 10℃ for winter, then the statement that "beginning of winter is beginning of winter" only conforms to the climate law of Huanghuai area. Mohe in the northernmost part of China and the area north of Daxing 'anling have entered the winter in early September, and Beijing has entered the winter in late June at 65438+ 10, while the winter in the Yangtze River basin will not really start until around the "light snow" solar term. In Shanghai 165438+ 10, the average temperature in the first five months was above 10℃, and in the last period it dropped below 10℃, so the winter in Shanghai lasted until the last period165438+1. In early winter, although there is less and less solar radiation in the northern hemisphere, there is still some heat storage on the surface in summer, so it is generally not too cold. When the weather is clear and cloudless, there is often warm and comfortable "Xiaoyangchun" weather. At this time, the cold air in the north also has a strong force, often invading the south, forming a strong wind, cooling down and accompanied by rain and snow. Therefore, in the early winter season, the weather is cold and warm, and cold and warm alternate frequently, which has adverse effects on people's lives, human health and agricultural production. Therefore, we should pay more attention to listening to the weather forecast, adjust clothes according to the weather changes, ensure good health, and take anti-freezing measures for crops to prevent freezing damage.

There are folk sayings such as "beginning of winter has no rain and sunny winter, beginning of winter has rainy winter and rainy winter" and "beginning of winter has a northwest wind and a bumper harvest in the coming year", which shows that the weather in beginning of winter has a great influence on the future climate and needs attention.

20. Xiaoxue

Every year (165438+1October 22~23), when the sun reaches 240 degrees of the yellow meridian, it is a light snow solar term, and it is the 20th solar term in 24 solar terms, indicating the start time and degree of snowfall. Twenty-four solar terms say: "In mid-October, the cold rain is thin, so it condenses into snow. The words of the villain are not prosperous. " Before and after the light snow, the first snow generally appeared in the Yellow River basin. However, snow is not "condensed by rain and thinned by cold air", but when the temperature in the cloud is lower than 0℃, water vapor condenses on tiny ice crystals in the cloud and grows into snow crystals. If the temperature under the cloud is higher than 0℃, the snow will melt into raindrops during the landing.

Snow is the product of cold weather. In the light snow solar term, the northern Sichuan Basin began to enter the winter. "Lotus flowers are not covered by rain, and chrysanthemums still have Ao Shuang branches", which has already presented the scene of early winter. Because there are barriers at the northern foot of Qinling Mountain and Daba Mountain to block the invasion of cold air and reduce the severity of cold wave, the basin is "warm in winter and cool in summer".

The number of snowfall days in the whole year is mostly less than 5 days, which is much less than that in the middle and lower reaches of the Yangtze River at the same latitude. There is little chance of snowfall before the heavy snow. Even in the middle of winter, you can rarely see the charming scenery of "blowing open the petals of ten thousand pear trees". For many years, there were no traces of snow at all in some places. Du Fu, a poet who once lived in Sichuan for a long time, has the feeling that it doesn't snow in winter in western Sichuan. Because the surface temperature of the basin is often above 0℃ in winter, it is more difficult to snow than to snow. Occasionally, although the sky is buzzing, there is no "broken jade" on the ground. In the cold western Sichuan Plateau, snow usually starts at 65438+ 10 all year round. The number of snowfall days in the northwest of the plateau can reach more than 60 days a year, and snowfall is possible in some alpine regions all year round.

Liu Zongyuan, a writer in the Tang Dynasty, once described the climate characteristics of Sichuan as "rainy days, dogs barking at sunrise". After the light snow in the basin, it is the period with the most fog and the least sunshine in a year. The foggy days in winter can account for half of the whole year, and the sunshine hours are only one-seventh of the whole year.

During the light snow, the first frost can be seen in the northwest of the basin, so it is necessary to guard against the harm of frost to crops. The lowest temperature in Gansu and northern Afghanistan is around-15℃, so it is necessary to keep livestock warm and cold.

2 1. Heavy snow

Every year (65438+February 6~8), when the sun reaches 255 degrees of the yellow meridian, it is a solar term of heavy snow. Heavy snow is 2 1 solar term in the 24 solar terms. At this time, the earth has put on winter clothes, and the weather is even colder. The possibility of snowfall is greater than the light snow season, so it is called heavy snow.

During the heavy snow season, the northern part of China is already a world of snow and ice wrapped in silver. Under normal circumstances, there are not many days of snowfall in the heavy snow season in Jianghuai area. Of course, in some years, the influence of strong cold air is earlier, and the northern scenery of Wan Li with frozen snow will also appear in the Jianghuai area.

As the saying goes, "Xue Rui indicates a good year". If snow covers the earth in severe winter, it creates a good wintering environment for wintering crops. If there is little or no snow, the overwintering crops will suffer from freezing injury. However, the snow season is not the coldest time of the year. Farmers should seize the time to apply wax fertilizer to winter wheat and rape, check the stored vegetables and potatoes frequently, and ventilate them in time.

22. Winter solstice

Every year (65438+February 2 1~23), when the sun reaches 270 degrees of the yellow meridian, the winter solstice solar term begins. The winter solstice is the 22nd of the 24 solar terms. In winter solstice, the sun shines directly on the Tropic of Capricorn, with the shortest day and the longest night in the northern hemisphere, and the least solar radiation heat is obtained. After the winter solstice, the direct position of the sun will gradually move northward, and the daytime in the northern hemisphere will gradually increase. The so-called "eating winter solstice noodles makes the day longer" means this.

In climatology, the winter solstice indicates the beginning of the dead of winter. Starting today, it will enter the cold. Today is the first day of the ninth day, 998 1 days later, the end of the winter will usher in a bright spring. In addition, the weather conditions from winter to Sunday have a good correspondence with the weather throughout winter. There are many meteorological proverbs circulating among the people, such as "dry winter and rainy year" and "dry winter and no rain on the winter solstice".

23. slight cold

Every year (65438+1October 5~7), when the sun moves to 285 degrees of the yellow meridian, it is a slight cold solar term. Slight cold is the 23rd of the 24 solar terms. This is not the coldest time of the year, but it is often around March 9.

As the saying goes, "March 9 is cold", and the degree of cold can be imagined. There's a saying in North China that "a slight cold is freezing, and dripping water turns into ice", but this year's statement is not effective. There is no strong cold air activity in the north recently, and the highest temperature in central and southern North China reaches 7~ 1 1℃, which is also rare in the same period in history. At present, the temperature in most northern wheat areas is high, but due to the large proportion of weak seedlings of winter wheat, it is still impossible to relax the cold and preserve moisture.

There are weather proverbs about slight cold: "Slight cold is not cold, clear the mire" and "Slight cold is too cold, so it will be warm next spring". The slight cold weather is sunny and warm, which indicates that it will be very cold next spring.

24. Great cold

Every year (65438+1October 20 -2 1), when the sun moves to 300 degrees of the yellow meridian, it is a severe cold solar term. The Great Cold is the last of the 24 solar terms. Cold means extreme cold. The cold season is on April 9 and the Jianghuai area, and the amount of rain and snow is much lighter and colder. As the saying goes, "it rains and snows every year, but not on April 9", and "walking on the ice on March 9" is a portrayal of the climate characteristics in the cold season.