summer

summer

Summer is the second season of the year, from the beginning of summer to the end of autumn. High temperature is the most significant climate feature in summer, but due to different regions, dry and wet environment, it will produce different hot and dry or humid and rainy climate. China has a vast territory, and the climate in summer is not the same in different regions.

Generally speaking, the monsoon area in Southeast China is hot and rainy in summer, the high altitude area in Southwest China is cool and rainy in summer, and the Northwest China is hot and dry in summer.

Spring, summer long, autumn harvest, winter storage, summer is the best season for the vigorous growth of many crops, sufficient light and suitable temperature and abundant rain provide the necessary conditions for plants. Monsoon climate is the main feature of China's climate. In summer, affected by the warm and humid air from the ocean, it is characterized by high temperature, humid and rainy. During the same period of rain and heat, it is conducive to the growth of crops. In summer, the crops enter the stage of vigorous growth.

In the sense of China's modern Climatology (Climatological Mean Temperature), five consecutive days with an average temperature higher than 22 degrees are regarded as summer, and five consecutive days with an average temperature lower than 22 degrees are regarded as autumn.

Time division

In China, summer begins at the beginning of summer (from May 5 to 7 each year) and ends at the beginning of autumn, while Westerners generally call it summer from the summer solstice to the autumnal equinox. In the southern hemisphere, December, January and February are generally defined as summer.

In the north temperate zone, the meteorological summer is from May 21 (Xiaoman) to August 22 (Chushu) in the Gregorian calendar; in the south temperate zone, the meteorological summer is from November 21 (corresponding to the light snow in the northern hemisphere) to February 19 (corresponding to the rain in the northern hemisphere).

According to the characteristics of the earth's revolution, the length of summer in the north temperate zone is theoretically longer than that in the south temperate zone.

In the sense of China's modern Climatology (Climatological Mean Temperature), five consecutive days with an average temperature higher than 22 degrees are regarded as summer, and five consecutive days with an average temperature lower than 22 degrees are regarded as autumn.

Season introduction

In the summer of the northern hemisphere, all kinds of organisms have come back to life, and most of them begin vigorous life activities. Many creatures will breed in summer, all kinds of animals choose summer mating, fertility; plants compete to blossom and bear fruit. In summer, everything flourishes here.

Summer is the time when Yin and Yang compete with each other. Yang moves upward and Yin forces downward. In summer, Yang Qi is abundant, especially in midsummer. In midsummer, the pure Yang Qi is the fear of yin and evil. Summer is divided into three periods: Mengxia, midsummer and summer. According to the Gregorian calendar, Mengxia is in May, midsummer is in June, and summer is in July. Because the direct sunlight on the day of the summer solstice is on the Tropic of cancer, the summer solstice is always on June 21 or 22 of the Gregorian calendar.

High temperature in summer in northern hemisphere is the most significant climate feature. Due to different regions, dry and wet environment, it will produce hot and dry or humid and rainy climate. In China, the coastal areas are heated in May, and the southwest area forms a low pressure, which causes the southwest monsoon. The southwest monsoon reaches the coastal areas of China in May. At this time, the northeast monsoon will be blocked by the southwest monsoon, and it is rarely affected in summer. It will not be affected until late August to mid September.

China enters summer with the arrival of the first southwest monsoon.

In the summer of May, the weather in the north is still very cold. The cold air in the north meets the southwest monsoon in the South China Sea, forming a trough of low pressure in the South China Sea, which is the beginning of the rainy season in Guangzhou. In June, the ridge line of the subtropical high moves to South China, and the Yangtze River Basin enters the Mei rainy season. In July, the subtropical high pressure reaches near the Yangtze River Basin of China with the passage of time There is a summer drought in this area.

Summer is the best season for many crops to grow vigorously. Sufficient light and suitable temperature provide the necessary conditions for plants. Most areas will be affected by low pressure, and the climate is relatively stable. However, typhoon will form on the ocean near the equator, which is easy to cause damage to the surrounding areas.

Astronomical solar term

Astronomy

In summer, the direct point of the sun is always in the northern hemisphere. It moved northward at first, reached the Tropic of cancer at the summer solstice, and then "regressed" to the south. Summer is the season with the longest sunshine in the northern hemisphere. There will be polar day in the Arctic Circle, and the sun never sets. On July 1-3, the earth will move to the farthest point of its orbit. From the plane of the ecliptic, the sun is in the background of Taurus, Gemini and cancer.

Solar term

At the beginning of summer, the sun is located at 45 degrees of the Yellow longitude, at the intersection of May 5-7

The sun of Xiaoman is located at 60 degrees of the Yellow longitude, which intersects on May 20-22

The sun of Mangchong is located at 75 degrees of the Yellow longitude and intersects on June 5-7

The summer solstice sun is located at 90 degrees of the Yellow longitude, and it meets on June 21-22

The sunstroke sun is located at 105 degrees of the Yellow longitude, which intersects on July 6-8

The sunstroke is located at 120 degrees of the Yellow longitude, at the intersection of July 22 and 24

Climatic characteristics

China has a monsoon climate. In winter, the cold air from Siberia, the cold pole of the northern hemisphere, frequently goes southward, making China the coldest in winter at the same latitude. In summer, the summer monsoon blows from the Southern Ocean, and it is easy to warm up because of the small land specific heat, which makes some parts of China hotter in summer at the same latitude.

China has a vast territory, and the climate in summer is not the same in different regions. Generally speaking, the monsoon area in Southeast China is hot and rainy in summer, the northwest is hot and dry in summer, and the southwest is cool and rainy in summer.

Due to the cold air in Siberia, the sky in the north of China is cloudless, the ground receives a lot of solar radiation, and the rainfall is scarce, and the transpiration is very weak, so sometimes the phenomenon that the north is hotter than the South appears in summer.

The southeast monsoon brings moist air from the sea. It first landed in the south of China and collided with the Siberian cold wind on the mainland. Therefore, the south of China entered the rainy season first.

With the strengthening of the southeast monsoon, July and August in northern China will also usher in rainy weather. There is a folk saying: "May is long in South China and June (in the middle and lower reaches of the Yangtze River), and rain is boundless in North China and Northeast China." It vividly describes the movement of rainfall belt in China.

Interpretation of traditional Chinese Medicine

Heatstroke instead of relieving it

Traditional Chinese medicine will divide heatstroke into "Yang heat" and "Yin heat". Yang heat is usually seen in the phenomenon of heatstroke caused by long-term exposure to the sun, while Yin heat is the cause of most heatstroke, which refers to "heat inside, cold and wet outside". It is usually caused by urban people solving heatstroke in the wrong way.

Traditional Chinese medicine will divide heatstroke into "Yang heat" and "Yin heat". Among them, Yang heat is usually seen in workers and sports people who have been exposed to the sun for a long time. The symptoms are dizziness, tiredness, thirst, body heat, etc. if you don't supplement water and rest in time, you may even have heat failure and shock, endangering life safety. The problem of Yin heat stroke is the cause of most cases of heat stroke.

The so-called "overcast heat" refers to "hot inside, cold and wet outside". It is usually caused by urban people's wrong way to relieve the heat. For example, when they get very hot outdoors, they suddenly enter the room with air-conditioning turned on; or when they are sweating, they take a cold bath or drink cold drinks. This can cause skin pores to contract, the body is difficult to dissipate heat and heatstroke. In the current summer days, sunscreen should be used to avoid the environment with too large temperature difference. When you feel uncomfortable due to sultry, you should go to a cool and ventilated place as soon as possible to let your body cool and replenish water properly.

If you can use the morning, evening or night to do moderate exercise, not only can healthy perspiration, but also can promote metabolism, help increase energy consumption and weight loss.

It is suitable to eat summer melons

For the best ingredients to relieve summer heat in summer, several kinds of melons are the most suitable, such as winter melon, bamboo shoot melon, etc. combined with traditional Chinese medicine, such as white lentils and lentil flowers, can not only remove dampness and relieve summer heat, but also invigorate spleen and appetizer to relieve summer heat. Among them, wax gourd with sweet taste and cold nature has the effect of clearing away heat and promoting diuresis, detumescence and detoxification, generating body fluid and removing trouble. If you eat wax gourd during the summer heat or cold, it can bring the effect of antipyretic treatment.

Because of the cold nature of wax gourd, people with deficiency cold should avoid eating as much as possible.

Don't eat hot and dry food

You must not eat too much hot food in summer, such as mutton. According to modern medicine, the stimulation of hot summer makes the nerve center in a state of tension, and the activity level of endocrine glands will also change, resulting in poor digestion, poor appetite and no desire to eat. So it's better to eat more light and less oily food in summer, which will be easier to digest, while too greasy food is not suitable, which will reduce the secretion of gastric juice and slow down the emptying of the stomach. In the hot and humid season, eating more heat clearing and dehumidification food can help prevent the body from being troubled by dampness and heat, which is quite helpful for relieving heat and generating fluid. Comparatively speaking, fried hot and dry food should be eaten less.

Weak constitution, eat less cold food

Mung bean is cool in nature and sweet in taste. It has the functions of clearing away heat and toxin, relieving heat and trouble, relieving thirst and strengthening stomach. From the perspective of dietotherapy, the warm, cold and other natural properties of food should be consistent with the physical state of the eater, so as to play a role in health care. Although mung bean soup has the effect of relieving heat and replenishing qi, moistening throat and relieving thirst, it belongs to people with cold constitution (such as cold and weak limbs, cold pain in waist and legs, diarrhea, etc.), eating mung bean will aggravate symptoms and even cause other diseases.

Cold bottom people drink less

Herbal tea

Many people like to drink a cup of frozen herbal tea to relieve summer heat in summer, but the original drink of herbal tea should be based on personal physique, such as people with cold background, drinking too much herbal tea will be dizzy at any time, even if people with hot background drink more, it is not appropriate, so we must pay attention to their physique and drink it properly. Because the herbal tea is cold and has the effect of clearing away heat and toxin, nourishing yin and reducing fire, but the cold bottom people who are prone to cold drink too much will aggravate the disease of cold, so the cold bottom people should choose the herbal tea mainly to remove dampness and cold, such as purple perilla leaf, ginger and jujube.

Chinese PinYin : Xia Tian