What is the significance and symbol of the summer solstice?

The summer solstice is the 10 of the 24 solar terms. After thousands of years of development, solar terms have been given different meanings and symbols, as well as summer solstice. The following is the "What is the Meaning and Symbol of the Summer Solstice" that I carefully arranged for you, for reference only, and I hope it will help you.

What is the significance and symbol of the summer solstice? The summer solstice is the 10 of the 24 solar terms. Fighting means afternoon. The longitude of the sun is 90 degrees. Gregorian calendar June 2 1-22. The solstice in summer is the turning point of the sun's northward movement. After the summer solstice, the direct point of the sun began to move southward from the Tropic of Cancer (23 26' north latitude). For the area north of the Tropic of Cancer in China, after the summer solstice, the height of the noon sun began to decrease day by day. For the area south of the Tropic of Cancer in China, after the sun directly returns to the south from summer to the future, the height of the sun begins to decrease day by day at noon.

Summer solstice time

The summer solstice is the longest day in a year, which is what we call "long days and short nights" in geography. The summer solstice is also the earliest of the 24 solar terms. June 2 1 or 22 of the Gregorian calendar every year is the summer solstice.

The start time of the summer solstice in 2022 is:

June 2, 20221,17: 13:40, Tuesday, May 23rd of the lunar calendar.

The end point of the summer from 2022 to Sunday is:

July 7, 2022 10:37:49, Wednesday, May 24 of the lunar calendar.

The implication of summer solstice

This means that the hot summer is coming. 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. " In other words, the name of the summer solstice only represents the day of the summer solstice in the solar terms, indicating that the hot summer is coming.

The solstice in summer is in mid-May. Summer is the biggest and most extreme, everything grows and flourishes here to the extreme, and the sun is also the most extreme, so it is the shortest night and the longest day in a year, which is a white night close to the extreme and the most poetic day in a year.

Summer solstice is also called "summer season" and "summer solstice festival". In the ancient summer solstice, people prayed for disaster and prosperity by offering sacrifices to God. During the summer solstice, the temperature is high, the sunshine is sufficient, the crops grow rapidly, and the physiological and ecological water demand is high in most parts of China. At this time, the precipitation has a great influence on agricultural output, and there is a saying that "raindrops are worth tens of millions in summer solstice".

Meteorological change

Temperature and precipitation

After the summer solstice, although the direct point of the sun began to move south from the Tropic of Cancer, the days in the northern hemisphere began to shorten gradually, but the temperature will continue to rise for a while, because the heat radiated by the sun to the ground is still more than the heat radiated from the ground to the air, so there is a saying that the summer solstice is not too hot. As the saying goes, "it's a hot day in dog days", and the real hot day is from mid-July to mid-August on the Gregorian calendar.

In summer solstice, the direct sunlight reaches the northernmost part of the year, and the daytime is the longest in all parts of the northern hemisphere. During this period, the temperature in most parts of China was high, the sunshine was sufficient, the crops grew rapidly, and the physiological and ecological water demand was high. After the summer solstice, the ground is heated strongly and the air convection is strong, and thunderstorms are often easy to form in the afternoon to evening. This kind of hot thunderstorm comes and goes, and the rainfall range is small. People call it "dividing fields in summer and rain".

"Summer solstice" is the starting point of midsummer. Although it has not reached the hottest day of the year, it is not far from "health". Starting from "midsummer", after three "three-night days", it entered the hottest dog days of the year. The so-called "several heads fell off in the middle of summer" is characterized by high temperature, high humidity and occasional thunderstorms from summer to the future.

"Stand tall, no shadow"

On the day of summer solstice, the sun is almost direct to the Tropic of Cancer, and it is absolutely (almost) direct until noon. In the area near the Tropic of Cancer, there will be a spectacle of "standing without a shadow". The phenomenon of "standing without shadow" only exists in the area south of the Tropic of Cancer, and the sun shines vertically on the ground twice a year. There are five signs of the Tropic of Cancer in Chinese mainland, which are located in Shantou, Conghua and Fengkai in Guangdong, Guiping in Guangxi and Mojiang in Yunnan.

Zhanjiang, Maoming, Yangjiang, Yunfu, Zhaoqing, Jiangmen, Foshan, Zhongshan, Zhuhai, Shenzhen, Dongguan, Huizhou and Shanwei, which are located south of the Tropic of Cancer in Guangdong Province, can be seen standing without a shadow twice a year. People living in the Tropic of Cancer and its vicinity to the south can set up a pole in the sun from summer to noon a few days before and after, and observe how the "immediate effect" becomes "without a trace".

Convective weather

After the summer solstice, the ground is heated strongly and the air convection is strong, and thunderstorms are often easy to form in the afternoon to evening. This kind of hot thunderstorm comes and goes, and the rainfall range is small. People call it "dividing fields in summer and rain". Liu Yuxi, a poet in the Tang Dynasty, skillfully used this weather to write a famous poem, "The east rises and the west falls, and the road is sunny and sunny." The heavy precipitation brought by convective weather is not always as beautiful as described in the poem, and it often brings local disasters.

Thundershower day

During the summer solstice, the temperature is high, the sunshine is sufficient, the crops grow rapidly, and the physiological and ecological water demand is high in most parts of China. At this time, the precipitation has a great influence on agricultural output, and there is a saying that "raindrops are worth tens of millions in summer solstice". At this time, the precipitation in the middle and lower reaches of the Yangtze River can generally meet the needs of crop growth.

After the summer solstice, the ground is heated strongly and the air convection is strong, which is easy to form thunderstorms. This kind of hot thunderstorm comes and goes, and the rainfall range is small. Heavy rains may occur in some areas, which may easily lead to floods and even threaten people's lives and property. Attention should be paid to strengthening flood control.

Jianghuai Meiyu

Summer solstice season is the "Meiyu" season in Jianghuai area. This is the yellow ripening period of plums in Jiangnan. The air is very humid, and cold and warm air masses meet here to form a trough of low pressure, which leads to rainy weather. In this weather, the utensils are moldy and the human body feels uncomfortable. Some mosquitoes breed quickly, and some intestinal bacteria are easy to breed. At this time, we should pay attention to drinking water hygiene and try not to eat cold food to prevent the occurrence and spread of infectious diseases.

High temperature sauna

Like the winter solstice, the summer solstice is also a solar term reflecting the changes of the four seasons. After the summer solstice, although the direct point of the sun gradually moved southward, the days in the northern hemisphere became shorter and the nights became longer. However, because the heat radiated from the sun to the ground is still more than the heat radiated from the ground to the air, the temperature will continue to rise in the future, so there is a saying that it is not too hot from summer to the sun.

The summer solstice means that the hot weather officially begins and then gets hotter and hotter, so there is a folk saying that the summer solstice is not too hot. From summer to the future, although the direct point of the sun gradually moves southward, the days in most parts of the northern hemisphere are shorter and the nights are longer, but the heat radiated by the sun to the ground is still more than the heat radiated from the ground to the air, so the temperature will continue to rise in the future.

Phenological phenomenon

In some ancient literary works in China, Xiaoman is divided into three stages: the first stage is the staghorn solution, which means that the deer's horn is forward, so it belongs to Yang. It is believed that it is the antlers that start to fall off in summer, but the dense one is yin, so it falls off in winter (dense and Lu belong to the same family, but the ancients thought that both belong to Yin and Yang). When the cicada starts to sing, it means that after the summer solstice, the male cicada will flap his wings and sing. Pinellia ternata was born in the third season, which means that 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 creatures that like yin begin to appear, while those that like yang begin to decline.

Is the solstice in summer the hottest time?

No, it's the hottest in dog days.

Why is it hot in dog days?

After lodging, the surface humidity increases, and the heat absorbed every day is more, but the heat emitted is less, and the heat on the surface is accumulated. So it gets hotter every day, and when it enters the dog days, the accumulated heat on the ground reaches its peak and the weather is the hottest. In addition, there is much rain in summer, the air humidity is high, and the heat capacity of water is much greater than that of dry air, which is also an important reason for the sultry weather. The subtropical high intensified in July and August. Under the control of the subtropical high, the descending airflow inside the high makes the weather clear and cloudy, which is beneficial to the sunshine, the ground radiation heats up and the weather is hotter.