The origin of great summer heat

What is the origin of the great summer heat? Major Heat

Great Summer-[Great Summer] is one of the twenty-four solar terms of the lunar calendar.

On July 23rd or 24th every year, the sun reaches longitude 120. Twenty-four solar terms: "in mid-June, ... it was hot, small and small, small at the beginning of the month, and big in the month, and it is still hot now." At this time, it is the hottest period of the year, with the highest temperature and the fastest growth of crops, and droughts, floods and windstorms are the most frequent in most areas. It is very important to grab crops and seeds, prevent drought and drainage, and manage fields.

The ancient summer heat in China is divided into three periods: "Rotten grass is firefly; Second, wait for the soil to moisten and cool off the heat; It will be fine when it rains. " There are more than 2000 species of fireflies in the world, which are divided into aquatic and terrestrial species. Terrestrial fireflies lay eggs on hay, and when it is hot, fireflies ovulate, so the ancients thought fireflies were made of rotten grass. The second weather is that the weather becomes sultry and the land is wet. The third kind of weather is frequent thunderstorm, which weakens the heat and humidity, and the weather begins to transition to beginning of autumn.

Summer is yellow day and night. For the areas where double-cropping rice is planted all over the country, the most intense and arduous "double grab" war with the scorching sun and high temperature in a year has begun. As the saying goes: "Early rice grabs the sun, late rice grabs the time", "If you don't mow the grass in summer, you will lack a reed a day". Timely harvesting of early rice can not only reduce the harm caused by wind and rain in the later period, but also ensure a high yield and harvest, making it possible to transplant rice seedlings in time for two nights to strive for sufficient growth period. According to the change of weather, arrange flexibly, cut more on sunny days and variety on cloudy days. We should finish planting for two nights before the end of July, and start in autumn at the latest. In hot summer, you can't get a brick in three days. In hot summer, water evaporates very quickly, especially in the middle and lower reaches of the Yangtze River during the summer drought, and the demand for water for crops planted vigorously is more urgent. It's really "a little summer rain is like silver, and a big summer rain is like gold." The leaf area of cotton during flowering and bolling reaches the maximum in its life, which is the peak of water demand. It is best to require that the soil moisture in the field accounts for 70% ~ 80% of the field capacity. If it is lower than 60%, it will lead to flowering and bolling, so it must be irrigated immediately. It should be noted that it is not advisable to irrigate when the temperature is high at noon, so as to avoid excessive changes in soil temperature and aggravate the shedding of buds and bolls. Soybean flowering and pod setting is also a critical period of water demand, which is very sensitive to water shortage. An agricultural proverb says, "When soybeans bloom, river shrimps touch the ditch." If there is drought, you should water it in time.

Summer maize in Huanghuai Plain has been generally jointing and heading, and heading is about to happen, which is the most critical period for yield formation, so it is necessary to guard against the harm of "neck drought".

"Rice is laughing in the field and people are jumping in the house." High temperature in midsummer is very beneficial to crop growth, but it has obvious adverse effects on people's work, production, study and life. Generally speaking, there are obviously more people suffering from heatstroke in hot days when the maximum temperature is higher than 35℃. In hot days with the highest temperature above 37℃, the number of people suffering from heatstroke will increase sharply. Especially in the middle and lower reaches of the Yangtze River under the control of subtropical high, the sun is like fire, the wind is small and the humidity is high, which makes people feel sultry. Nanjing, Wuhan and Chongqing, three famous stove cities along the Yangtze River in China, have an average annual hot day of 17 ~ 34 days and 3 ~ 14 days. In fact, there are many places hotter than the "three stoves", such as Anqing, Jiujiang and Wanxian. Among them, the average high temperature days in Guixi, Jiangxi, Hengyang, Hunan and Kaixian, Sichuan exceeded 40 days. The whole middle and lower reaches of the Yangtze River is a big stove, so it is particularly important to do a good job of heatstroke prevention and cooling. In addition, many kinds of crop pests are active in summer, so special attention should be paid to personal protection when applying pesticides at high temperature to avoid poisoning accidents.

Hot in summer means hot. Explanation is the hottest solar term in a year.

Generally speaking, the summer solar term is the period with the most sunshine and the highest temperature in South China, the period with the most abundant rainfall, the most common thunderstorm and the most concentrated days of high temperature above 30℃ in western South China, and the period with the most frequent occurrence of high temperature above 35℃ in eastern South China.

The high temperature around summer is a sign of normal climate, because in Da Chun, higher temperature is beneficial to the flowering and filling of crops. However, if the temperature is too high, it will inhibit the growth of crops and the seed setting rate of rice will decrease obviously. Light, heat and water are at the peak of a year after rainfall in western South China, which promote each other and form good climatic conditions for crop growth in Da Chun, but attention should be paid to flood control and drainage. In eastern South China, high temperature and long sunshine are often accompanied by little rain, which will not only limit the exertion of light and heat advantages, but also aggravate the adverse effects of drought on crops in spring, summer and summer. In order to resist the summer drought, in addition to the previous period >>

It is reported that as early as the Spring and Autumn Period and the Warring States Period, China could measure the length of the midday sun shadow with a soil gauge (a pole was erected on the plane) to determine the four solar terms of winter solstice, summer solstice, vernal equinox and autumnal equinox. 1 year. At noon, the shortest day is the summer solstice, and the longest day is 65438.

In ancient times, 1 year was divided into 12 months, and each month had two solar terms. The former is solar terms, while the latter is neutral. Later generations collectively referred to solar terms and neutral gas as solar terms.

It can be seen from the naming of 24 solar terms that the division of solar terms fully considers the changes of natural phenomena such as seasons, climate and phenology. Among them, beginning of spring, Changxia, beginning of autumn, beginning of winter, vernal equinox, autumnal equinox, summer solstice and winter solstice are used to reflect the seasons. The vernal equinox, autumnal equinox, summer solstice and winter solstice are divided from an astronomical point of view, reflecting the turning point of solar height change. Beginning of spring, Changchun, beginning of autumn.

The five solar terms of slight summer heat, great summer heat, slight cold and severe cold reflect the change of temperature. The four solar terms of rain, Grain Rain, light snow and heavy snow reflect the phenomenon of precipitation, indicating the time and intensity of rainfall and snowfall. The three solar terms, White Dew, Cold Dew and First Frost, on the surface reflect the phenomenon of condensation of water vapor, but in essence reflect the process and degree of gradual temperature drop: when the temperature drops to a certain extent, water vapor condenses.

Xiaoman and awn seeds reflect the maturity and harvest of related crops; Scaring and Qingming reflect natural phenological phenomena, especially stinging, which indicates the return of spring with the recovery of lightning and underground stinging insects.

What does a great summer mean? Summer heat is one of the 24 solar terms, with the northern hemisphere between July 22nd and 24th, the southern hemisphere between1October 20th and 2 1, and the sun at longitude120th. In the hot summer, Han people have the custom of drinking tea, drying ginger and burning incense.

"Twenty-four solar terms" said: summer heat, summer heat, the size of the summer heat, small at the beginning of the month, large in the month, it is still hot today. Its climatic characteristics are: Dou refers to C as a great summer heat, and the weather in Sri Lanka is much stronger than a small summer heat, so it is called a great summer heat. Summer solar terms coincide with midsummer in dog days. This is the hottest period of the year, with the highest temperature and the fastest growth of crops. At the same time, various meteorological disasters such as drought, waterlogging and wind disasters are also the most frequent in many areas.

Why do you drink mutton soup in summer? Who knows the origin of this custom? How can I drink mutton soup in summer? You should drink mung bean soup. Mutton soup is warm and suitable for drinking in cold weather.

Satisfied, please adopt.

Matters needing attention and anecdotes in summer heat; Matters needing attention in high temperature health care in summer.

1, heatstroke prevention

When the relative humidity is higher than 85% and the temperature is 30-3l℃, or when the relative humidity is 50% and the temperature is 38℃, or when the humidity is low and the temperature is 40℃, the temperature regulator will have difficulty and heatstroke will occur. One reason of heatstroke is that sweat is not easy to evaporate because of high temperature and high humidity, and the other reason is that sweat seeps out too much because of high temperature and low humidity, so that human water can not be replenished.

The most important thing to prevent heatstroke is to improve the microclimate environment, heat insulation through trees and water curtains, and cooling through natural and mechanical ventilation environment. For high-temperature workers, it is necessary to provide reasonable nutrition, and drinks and medicines for heatstroke prevention and cooling are also necessary.

2, prevent skin diseases and food poisoning

The dog days are hot and humid, bacteria and viruses multiply rapidly, and the incidence of skin diseases is also increasing, such as eczema, prurigo and fungal infection. Therefore, we should pay more attention to the cleanliness of the skin, ventilate indoors and wash our hands after taking the bus.

Bacteria multiply very fast in this solar term and easily cause food poisoning. The main symptoms are fever, chills, abdominal pain, diarrhea, purulent bloody stool and acute diarrhea. See a doctor as soon as possible. In addition, pay attention to food hygiene, pay attention to killing flies, and don't eat unclean meals. It is best to eat the food on the same day, and the food should be boiled and heated overnight.

Step 3 exercise reasonably

For healthy people, you can do more exercise on the premise of drinking more water, eating reasonably and getting enough sleep. Sweating is also good for your health. The amount of exercise varies according to your physical fitness. Generally speaking, a healthy person will sweat a lot after doing some big exercises, which will make his body comfortable, and the amount of exercise should be based on this. It is best to exercise in the morning or evening, and avoid exercising in the scorching sun. Choose sports with relatively small amount of exercise, such as broadcast gymnastics, Tai Ji Chuan, skipping, jogging, badminton, table tennis, etc. Avoid being too tired and sweating, consuming gas and hurting body fluid. It is worth noting that after stopping exercise, you can't use cold water to cool your body, and you can't drink too much cold drinks. It is best to drink hot tea or mung bean soup to prevent heatstroke. Don't stay in bed immediately after strenuous exercise and don't eat immediately.

Interesting Stories about Summer: The Origin and Customs of Summer

1, the origin of solar terms

When the sun reaches longitude 120, it is a solar term of "great summer heat". "Big Summer", like "Little Summer", is a festival that reflects the degree of summer heat, and "Big Summer" means extremely hot. Twenty-four solar terms: "in mid-June, ... it was hot, small and small, small at the beginning of the month, and big in the month, and it is still hot now." At this time, around the Mid-Autumn Festival, most parts of the country entered the hottest period of the year, and it was also the fastest growing period of warm-loving crops. However, natural disasters such as droughts, floods and typhoons occur frequently, and the tasks of drought relief and field management are very heavy.

Generally speaking, the summer solar term is the period with the most sunshine and the highest temperature in South China, the period with the most abundant rainfall, the most common thunderstorm and the most concentrated days of high temperature above 30℃ in western South China, and the period with the most frequent occurrence of high temperature above 35℃ in eastern South China. The summer heat is also the season with the most thunderstorms. There is a proverb that says, "Without a drop of lightning in the east, the west can't walk", which means that if there is lightning in the east in summer afternoon, it won't rain here. If lightning is in the west, it will come soon, and it is too late to hide. People often call the thunderstorm in summer afternoon "northwest rain" and describe it as "northwest rain, which falls on the driveway." "Summer rain separates the ridge of the field" and "Summer rain separates the back of the cow". It vividly shows that thunderstorms are often sunny here and sunny there, just like the poem of Liu Yuxi, a poet in the Tang Dynasty: "The east is sunny, the west is rainy, and the road is sunny."

The ancient summer heat in China is divided into three periods: "Rotten grass is firefly; Second, wait for the soil to moisten and cool off the heat; It will be fine when it rains. " There are more than 2000 species of fireflies in the world, which are divided into aquatic and terrestrial species. Terrestrial fireflies lay eggs on hay, and when it is hot, fireflies ovulate, so the ancients thought fireflies were made of rotten grass. The second weather is that the weather becomes sultry and the land is wet. The third kind of weather is frequent thunderstorm, which weakens the heat and humidity, and the weather begins to transition to beginning of autumn.

2, solar terms customs

The 22nd of this year is the summer heat in the twenty-four solar terms of the China lunar calendar. The hot summer is the hottest season in a year, and it is also the season with the fastest growth of crops and the most frequent droughts, floods and windstorms in various places. Agricultural activities such as grabbing crops and seeds, fighting drought and drainage are more arduous. Nevertheless, "exquisite" China people still don't forget to take time out of work and hold various folk activities on this day every year to express their good hopes for life in the hot summer.

The folklore of summer solar terms is mainly reflected in eating. There are two kinds of folk food customs in this season: one is to eat cold food to cool off the heat. For example, southeast Guangdong ... >>

The origin of the twenty-four solar terms is a precious scientific heritage created by Chinese ancestors after thousands of years of practice. It is a tool to reflect the changes of weather, climate and phenology and master the farming season.

As early as the Spring and Autumn Period and the Warring States Period, China was able to measure the length of the sun's shadow at noon with a soil gauge (a pole was erected on the plane), thus determining four solar terms: winter solstice, summer solstice, vernal equinox and autumn equinox. In a year, the shortest day of the noon soil return shadow is the summer solstice, the longest day is the winter solstice, and the shadow with moderate length is the vernal equinox or autumn equinox. The Book of History in the Spring and Autumn Period recorded the solar terms. The twenty-four solar terms are completely recorded in Huainanzi written by Liu An in the Western Han Dynasty. In ancient China, the lunar calendar was used to record time, and the solar calendar was used to divide the 24 solar terms of spring, summer, autumn and winter. Our ancestors called five days 1, and three days were called solar terms. The whole year was divided into 72 days out of 24 solar terms.

With continuous observation, analysis and summary, the division of solar terms is gradually enriched and scientific. By the Qin and Han dynasties more than 2000 years ago, a complete concept of 24 solar terms had been formed.

In ancient times, a year was divided into twelve months, and each month had two solar terms. The former is solar terms, while the latter is neutral. For example, beginning of spring is the first month's festival, and it rains in the first month. Later generations called solar terms and neutral gas solar terms.

The names of the 24 solar terms are: beginning of spring, Rain, Sting, Vernal Equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, Chufrost, beginning of winter, Light Snow, Winter Solstice, Slight Cold and Severe Cold.

The twenty-four solar terms are divided according to the position of the sun on the ecliptic (that is, the orbit of the earth around the sun). Depending on the sun starting from the vernal equinox (longitude zero, at this moment the sun shines vertically on the equator), every advance of 15 degrees is a solar term; After a week's operation, I returned to the vernal equinox, which is a tropical year with 360 degrees, so it is divided into 24 solar terms. The dates of solar terms are relatively fixed in the solar calendar. For example, beginning of spring in the solar calendar always falls between February 3rd and 5th. However, in the lunar calendar, the date of solar terms is not easy to determine. Take beginning of spring as an example. It can be the first day of the lunar calendar in the previous year, 65438+February 15, and the latest is the first month, 15.

It can be seen from the naming of the twenty-four solar terms that the division of solar terms fully considers the changes of natural phenomena such as seasons, climate and phenology. Among them, beginning of spring, Changxia, beginning of autumn, beginning of winter, vernal equinox, autumnal equinox, summer solstice and winter solstice are used to reflect the seasons, and a year is divided into four seasons: spring, summer, autumn and winter. The vernal equinox, autumnal equinox, summer solstice and winter solstice are divided from an astronomical point of view, reflecting the turning point of solar height change. Beginning of spring, Changchun, beginning of autumn and beginning of winter reflect the beginning of the four seasons. Because China is a vast country with a very obvious monsoon and continental climate, the weather and climate vary greatly from place to place, so the four seasons in different regions are also very different.

The five solar terms of slight summer heat, great summer heat, slight cold and severe cold reflect the change of temperature and are used to express the degree of heat and cold in different periods of the year; Rain, Grain Rain, light snow and heavy snow reflect the phenomenon of precipitation, indicating the time and intensity of rainfall and snowfall; The three solar terms, White Dew, Cold Dew and First Frost, on the surface reflect the phenomenon of condensation and condensation of water vapor, but in essence reflect the process and degree of gradual temperature drop: when the temperature drops to a certain extent, water vapor condenses; The continuous drop in temperature not only increases condensation, but also gets colder and colder; When the temperature drops below zero degrees Celsius, water vapor condenses into frost.

Xiaoman and awn seeds reflect the maturity and harvest of related crops; Frightening and Qingming reflect natural phenological phenomena, especially stinging, which indicates that spring will return with the recovery of early thunder in the sky and underground stinging insects.

Twenty-four agricultural songs in Hua Xinfeng's twenty-four solar terms. From the first frost, it is said that "slight cold" is colder than "great cold"

Talk about the customs and climate of the summer solstice; The climate and customs of winter solstice.

The origin of the twenty-four solar terms, twenty-four solar terms, must depend on the true position of the sun in the sky. It is actually a "moment" rather than a "day". China's traditional calendar is a combination of Yin and Yang, and the criterion is the movement of the sun (day, year and solar terms) and the movement of the moon (month). Observed from the earth, the sun will move eastward by about 1 degree every day, and the time of one round is called "tropic year" or "solar year", and its trajectory is called "ecliptic". Because the inclination of the earth's rotation axis relative to the public rotation axis is 23.5 degrees, the elevation angle of the sun is higher at noon in summer and lower in winter, which affects the temperature and season throughout the year. In order to let our ancestors know the climate change in cold and summer, decide the progress of farming or serve as a reference for daily life, ancient historians stipulated that the tropical year from winter solstice to winter solstice of the following year should be divided into twelve equal parts, which is called Zhongqi; Then, the two equal parts of neutral gas are called solar terms, which are the source of 24 solar terms. The formulation of this solar term is called "flat gas method". However, because the earth's orbit around the sun is elliptical. Near the sun, the speed of the earth's revolution is faster, but far away, it is slower. For the Central Plains region where this calendar was made at that time, some solar terms could not reflect the real climate. Therefore, since the Qing Dynasty, the vernal equinox has been set at 0 degrees, and every time the sun runs 15 degrees on the ecliptic, it is set as a solar term or neutral atmosphere, so the 24 solar terms have 24 specific moments instead of 24 specific days. This method of making solar terms is called "fixing gas method". Beginning of spring/Rain/Smell/Equinox/Qingming/Grain Rain/Long Summer/Xiaoman/Mangzhong/Summer Solstice/Slight Summer/Great Summer/beginning of autumn/Early Summer/Millennium/Equinox/Cold Dew/First Frost/beginning of winter/Light Snow/Heavy Snow/Winter Solstice/Slight Cold/Severe Cold/.

Beginning of spring: Spring begins. beginning of spring means the beginning. Spring is stupid, which means that everything begins to come alive.

Rain: When spring comes to the world, the rain begins to increase and the spring rain keeps coming.

Sting: Insects hibernate or hide, which is called sting. Spring thunder will awaken the dormant and hibernating insects underground, and the excavation activity will begin.

Equinox: In the middle of spring, the sun shines directly on the equator. On this day, the sun rises in the east and sets in the west. The northern hemisphere and the southern hemisphere of the earth receive equal light, and the length of day and night is equal. In ancient times, it was called vernal equinox, and autumn was divided into day and night.

Qingming: The weather is getting warmer and warmer, spring is blooming, vegetation is beginning to sprout and flourish, and the earth is clear and beautiful.

Grain Rain: Rain gives birth to a hundred grains. At this time, farmers have just finished spring ploughing, and the seedlings in the field need a lot of rain. Timely and sufficient rain can make the grain grow sturdily. But the climate at this time is sunny, rainy and hot, which is the most unpredictable.

Long summer: Since early summer, the climate has been warm and everything has grown rapidly.

Xiaoman: Full refers to the full grain, and summer crops such as rice and wheat are about to bear fruit, waiting for maturity, but not yet full.

Ear seed: crops with awns begin to mature and bear ears. At this time, it is also a suitable season to sow crops in autumn.

Summer solstice: the hot summer is coming innocently. At this time, the sun shines directly on the Tropic of Cancer, and the northern hemisphere receives the most light, with the longest day and the shortest night. At noon, the elevation of the sun is the highest in a year, so the sun shadow is the shortest in a year. After the summer solstice, the days get shorter and the nights get longer.

Slight summer heat: summer heat is hot. At this time, the weather is getting hotter, but it is not hot enough. Although the northern hemisphere is exposed to the sun for the longest time from summer to Sunday, the heat from the sun must first warm the ground and the atmosphere before it can be stored in the atmosphere, so the weather starts to heat up slowly from summer to Sunday, and the heat will gradually rise to the extreme from summer to the future.

Summer heat: the climate is extremely hot, reaching its peak.

Beginning of autumn: From beginning of autumn, the temperature will change from hot to cold, and cool and comfortable autumn is coming.

Summer heat: It means that the summer heat is over, but sometimes a sunny afternoon is as hot as the summer heat, which can be regarded as the return of summer.

The Millennium: It's getting cold. At night, the water vapor contained in the air comes into contact with the objects cooled rapidly by radiation on the ground, so some of them condense into water droplets and attach to the flowers and leaves on the ground. These transparent and sparkling water drops are called white dew.

Autumnal Equinox: Autumn is halfway through, just like the vernal equinox. At this time, the sun shines directly on the equator, and the northern and southern hemispheres on the earth receive equal light, and the length of day and night is equal.

Cold dew: this >>

The origin of the twenty-four solar terms? The origin of the twenty-four solar terms

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. After continuous improvement and perfection, by the Qin and Han Dynasties, the 24 solar terms had been completely established. In BC 104, the taichu calendar written by Deng Ping officially set 24 solar terms in the calendar, and defined the astronomical position of the 24 solar terms.

The time when the sun runs along the longitude of the Yellow River from zero 15 degrees is called "a solar term". It runs 360 degrees every year, and * * * experiences 24 solar terms, twice a month. Among them, the first solar term of each month is "solar term", that is, beginning of spring, Jingzhe, Qingming, Changxia, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Hanlu, beginning of winter, Heavy Snow, Xiaohan, etc. 12 solar terms; The second solar term of each month is "Zhongqi", that is, there are 12 solar terms such as rain, vernal equinox, Grain Rain, Xiaoman, summer solstice, great summer heat, intense heat, autumn equinox, first frost, light snow, winter solstice and great cold. "Solar term" and "neutral qi" appear alternately, each lasting 15 days. Now people have called "solar terms" and "neutral gas" solar terms.

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.

In order to facilitate memory, people compiled 24 solar terms songs:

Twenty-four solar term song

The spring rain shakes the spring and the valley days, and the summer is full of mountains and summers.

Autumn dew, autumn frost, little snow in winter and cold in winter.

Seven-character poem of twenty-four solar terms

The earth goes around the sun, and it takes a year to complete a circle.

A year is divided into December, and the 24 solar terms are closely linked.

According to the Gregorian calendar, these two gases will not change every month.

The first half of the year is Saturday and Monday, and the second half is every eight days and every Wednesday.

These are festivals, and the difference is only one or two days.

There are 24 verses in succession, and the following formula is kept in mind:

A slight cold in January was followed by a severe cold, and it rained in the spring of February;

The vernal equinox is in March and Qingming Grain Rain is in April.

Long summer and full summer in May, full summer solstice in June;

July is hot and slightly hot, and August is long summer, beginning of autumn;

In September, the Millennium meets the autumnal equinox, and the first frost and cold dew are all in October;

There is a light snow in 1 1 month in beginning of winter, and a heavy snow in winter solstice to welcome the New Year.

Grasp the season and busy production, sow and harvest in time to ensure a bumper harvest.

With the spread of China calendar, the 24 solar terms have spread to many parts of the world.

Beginning of spring: beginning of spring is standing, and beginning of spring is beginning of spring.

Rain: It began to rain and gradually increased.

Sting: Sting means hiding. Sting refers to the sudden movement of spring thunder, which awakens the hibernating animals in the soil.

Equinox: Equinox means equal share. The vernal equinox means that day and night are equally divided.

Qingming: sunny and lush.

Grain Rain: Rain makes a hundred valleys. With sufficient and timely rainfall, cereal crops can thrive.

Long summer: the beginning of summer.

Xiaoman: Summer crops such as wheat are full of seeds.

Miscanthus species: Miscanthus crops such as wheat are mature.

Summer solstice: The hot summer is coming.

Summer heat: Summer heat means heat. Slight summer heat refers to when the climate begins to get hot.

Big institutions: the hottest time of the year.

Beginning of autumn: The beginning of autumn.

Summer heat: place means stop and hide. Summer is the end of hot summer.

White dew: The weather turns cold and the dew condenses into white.

Autumnal equinox: divided equally between day and night.

Cold dew: Dew is cold and will freeze.

First frost: it's getting colder and colder, frosty.

Beginning of winter: The beginning of winter.

Xiaoxue: It's starting to snow.

Heavy snow: the snowfall is increasing, and there may be snow on the ground.

Solstice of winter: the cold winter is coming.

Slight cold: The climate began to get cold.

Great cold: the coldest time of the year.

Beginning of Spring

One of the 24 solar terms. The solar term that begins in spring. On February 4th or 5th every year, when the sun reaches 3 15 degrees, it is beginning of spring. "Twenty-four solar terms": "The first month festival, the beginning, the beginning ... long summer, autumn and winter are the same." The ancient "Li Si" refers to the beginning of spring, summer, autumn and winter, and its agricultural meaning is "planting in spring, growing in summer, harvesting in autumn and storing in winter", which summarizes the whole process of the relationship between agricultural production and climate in the middle and lower reaches of the Yellow River. China has a vast territory, complicated geographical conditions, great climate difference and different seasons. Therefore, although "Li Si" can reflect the climate characteristics of the four seasons in the middle and lower reaches of the Yellow River, the specific climate significance of "Li Si" is not significant and cannot be applied to all parts of the country.

The date of soil thawing in the middle and lower reaches of the Yellow River began in early spring. The first weather in beginning of spring should be "easterly thaw", which is basically the case, but as a symbol of beginning of spring, it is too early.

In China's climatology, beginning of spring is usually defined as a day when the daily average temperature is stable above 10℃ every five days, which is inconsistent with the meaning of beginning of spring in the middle and lower reaches of the Yellow River. ......& gt& gt