What are the solar terms from summer to the future?
After the summer solstice, there is a light summer solar term, LesserHeat, which is the eleventh solar term among the 24 solar terms, and it is also the end of the noon month and the beginning of the month. On July 7th or 8th of every year in Gregorian calendar, when the sun reaches 105, it is considered as a slight summer heat. Summer heat, which means hot, is a little hot, not very hot. It means that the weather is getting hotter, but it is not the hottest, and most parts of the country are basically in line with it. Crops all over the country have entered a vigorous growth period, and it is necessary to strengthen field management.
In ancient China, the summer heat was divided into three periods: "First, it was warm and windy; Second, wait for crickets to live in space; The third waiting eagle began to crow. " In summer, there is no cool wind on the earth, and all the winds carry heat waves; The words describing crickets in the Book of Songs in July are "Wild July, August, House September, Bed October". August mentioned in this paper is June in the summer calendar, which is a short time in summer. Because of the heat, crickets leave the field and go to the corner of the yard to escape the heat. In this solar term, the eagle is in the cool high air movement, because the ground temperature is too high.
At this time, the Meiyu in the Jianghuai Basin is coming to an end, and the temperature in long summer has risen and entered the summer drought period; However, when North China and Northeast China entered the rainy season, tropical cyclones were active frequently, and the number of tropical cyclones landing in China began to increase. After the summer, the south should pay attention to drought resistance and the north should pay attention to flood control. Crops all over the country have entered a vigorous growth period, and it is necessary to strengthen field management. Signs of slight summer heat: plum blossoms fall.
The characteristics of light weather in summer
In summer, the average temperature in southern China is about 33 degrees Celsius. In mid-July, the average daily temperature in the low-altitude valley area in southeast China was higher than 30℃, and the maximum daily temperature was higher than 35℃. In the northern part of the northwest plateau, frost and snow can still be seen at this time, which is equivalent to the scene of early spring in South China.
Since the beginning of summer, the plum rains in the Jianghuai basin have ended one after another, and the southeast monsoon rainy season from the Pacific Ocean has begun in the vast areas north of the Huaihe River and east of the Qinling Mountains. The precipitation has increased significantly and the rainfall is relatively concentrated. South China, Southwest China and Qinghai-Tibet Plateau are also in the southwest monsoon rainy season from the Indian Ocean and the South China Sea. The middle and lower reaches of the Yangtze River are generally hot and rainy under the control of subtropical high. In some years, the cold air force in the north is still strong before and after the slight summer heat, and it is evenly matched with the warm air in the south in the middle and lower reaches of the Yangtze River, leading to frontal thunderstorms. Thundershowers in summer are often the weather information of "yellow plum falling", which indicates that the rain belt will stay in the middle and lower reaches of the Yangtze River for some time.
Around the summer heat, most parts of South China entered the season with the most thunderstorms. Thunderstorm is a disastrous weather phenomenon, often accompanied by strong winds, heavy rain and sometimes hail, which is easy to cause disasters. In the eastern part of South China, because it is often controlled by subtropical high, it is often sunny and hot, and after experiencing a slight summer heat, it begins to enter the summer drought period. Climatic characteristics of drought in the east and waterlogging in the west in most parts of southern China.
Basic introduction of summer solstice
June 26th or 22nd is the summer solstice. Although the summer solstice has the longest day and the highest sun angle, it is not the hottest time of the year. Because, close to the surface of the heat, at this time still continue to save, did not reach the maximum time. As the saying goes, "Hot days are in dog days", and the real hot weather is calculated by summer solstice and beginning of autumn. From mid-July to mid-August, the temperature is the highest in all parts of the country, and the highest temperature in some areas can reach about 40℃.
What is the origin of the summer solstice?
Solstice is the earliest of the 24 solar terms. In the 7th century BC, the shadow of the sun was measured by civil soil gauge, thus the summer solstice was determined. The annual summer solstice begins on June 2nd1day (or 22nd) and ends on July 7th (or 8th). According to "Zunxian Manuscript", "The sun arrives in the north, the days are long and the shadows are short, so it is called the summer solstice. At best, it is excellent. " On the day of summer solstice, the sun directly reaches the northernmost part of the year, almost directly to the Tropic of Cancer (23 26' north latitude), and the daytime in the northern hemisphere reaches the longest, and the farther north it is, the longer it is. For example, the daily length of Haikou in Hainan is a little more than 13 hours, Hangzhou is 14 hours, Beijing is about 15 hours, and Mohe in Heilongjiang can reach 17 hours. From summer to the future, the position of direct sunlight on the ground gradually moves southward, and the daytime in the northern hemisphere is shortened day by day. There is a folk proverb that "eating noodles on the solstice in summer will shorten the day". At this time, the southern hemisphere is in the middle of winter.
After the summer solstice, due to the vigorous growth of crops, the rapid growth and spread of weeds, pests and diseases, and the golden season of grass, fertilizer and livestock flourishing in plateau pastoral areas, agricultural production in most parts of southern China entered the field management period. At this time, the rainfall in the western part of South China increased obviously, which gradually changed the distribution trend of rainfall in South China from the east to the east since the spring. If there is a summer drought, it is generally expected to be lifted at this time. In the past 30 years, the number of large-scale floods in western South China in late June was small, but the degree was serious. Therefore, special attention should be paid to preparing for flood control. The summer solstice solar term is the solar term with the largest annual rainfall in eastern South China, which is often controlled by subtropical high in the future, resulting in summer drought. In order to enhance drought resistance and win a bumper harvest in agriculture, it is an important measure to capture and store pre-dormant rainwater in these areas.
What are the three stages of the summer solstice?
There are three stages from summer solstice: first, the release of antlers, second, the beginning of cicada singing, and third, the birth of Pinellia ternata; The third stage of the summer solstice is like this. On the day of summer solstice, the antlers were untied. On the fifth day, they began to sing. On the fifth day, Pinellia ternata was born. That is to say, every five days is a waiting period, and the summer solstice falls on June 2 1-22 in the solar calendar every year, so we can add five days to this time to calculate the time of each of the three waiting periods from summer solstice to Sunday.
Antler solution:
On the solstice of summer, Yin Qi was born, and Yang Qi began to decline, so the front antlers began to fall off.
The first sound:
After the summer solstice, the male cicada flutters its wings because of Yin Qi's feeling.
Pinellia ternata:
Pinellia ternata is a shade-loving herb, named after it was born in swamps or paddy fields in midsummer.
Although Mi and Lu belong to the same family, the ancients thought they belonged to Yin and Yang. The deer's horn faces forward, so it belongs to Yang. On the solstice of summer, Yin Qi was born, and Yang Qi began to decline, so the front antlers began to fall off. Because mi is cloudy, it falls in the corner of the winter solstice. The male cicada will flap its wings and sing after the summer solstice because of Yin Qi's feeling; Pinellia ternata is a shade-loving herb, named after it was born in swamps or paddy fields in midsummer. It can be seen that in the hot summer, some yin-loving creatures began to appear, while positive creatures began to decline.