What month is autumn in Beijing?

Autumn in Beijing is September-165438+ 10. The characteristics of autumn: the temperature drops gradually, the autumn wind is cool, the summer heat disappears, the fruits are covered with branches, and the fields are golden. In autumn, the cold air in the north is constantly invading, but its power is not very strong. Autumn weather often forms in northern China, and continuous autumn rain often appears in West China.

The introduction of autumn in China is traditionally the "beginning of autumn" with 24 solar terms as the starting point in beginning of autumn. Entering autumn means that rainfall and humidity tend to decrease or decrease. In nature, the qi of Yin and Yang began to change, the yang gradually declined, the yin gradually emerged, the climate changed from hot to cold, and everything was born with cold and gradually declined.

According to modern meteorology, the autumn in the north temperate zone is from August 23rd (summer) to165438+1October 22nd (light snow). Autumn in the south temperate zone is from February 19 (rain in the northern hemisphere) to May 2 1 (xiaoman in the northern hemisphere).

At present, the division of the four seasons in China is often based on the change of temperature, and the division of "climate average temperature" by modern scholar Zhang Baokun is adopted. According to the weather average temperature method, there are two main criteria to judge autumn. First, the average daily temperature for five consecutive days 10℃-22℃ can be regarded as autumn and become a "short mark"; Second, the moving average temperature of five consecutive groups is lower than 22℃. A set of moving average temperatures refers to the average temperature of the day plus the average temperature of the previous four days divided by 5 to get the moving average temperature of five days, which is a "sliding scale". Entering autumn means that the hot weather has passed and it is beginning to cool down.

Autumn is the harvest season, and many plants mature in autumn. In autumn, in nature, the qi of yin and yang begins to change, the yang is gradually declining, the yin is gradually flourishing, the climate turns from hot to cold, and everything is born with cold and gradually declines. This is the season of alternating hot and cold. As the temperature gradually drops, the leaves of many deciduous perennial plants will gradually change color, wither and fall off, leaving only branches for winter. Panicum miliaceum will come to the end of his life, wither and die. Seasonal variation covers many aspects of climate characteristics, and it is not accurate to judge autumn only by temperature. The most obvious change in autumn is that the leaves of vegetation change from lush green to yellow, and the leaves begin to fall and the crops begin to mature.

The beginning of autumn does not mean the end of hot weather. As the saying goes, "the summer heat is in dog days", according to the calculation method of "dog days", beginning of autumn is often in dog days until the summer heat, so the weather is still very hot in early autumn, and it will generally get cold after the Millennium solar terms. The watershed of summer heat is in autumn, not at the turn of summer and autumn. The climate in autumn is divided into two stages, the early autumn is sultry, and the climate tends to be dry and cool after the Mid-Autumn Festival.

According to the average climate temperature of modern scholar Zhang Baokun, there are four seasons in a year. The index is that the average temperature is lower than 10℃ in winter, higher than 22℃ in summer, and 10~22℃ in spring and autumn respectively.

The standard of average temperature in autumn adopted in meteorology is: after the intense summer heat, the average temperature for five days will be kept below 22℃, that is, it will enter autumn, and when it is lower than 10℃, it will end in autumn (average temperature: 0: 00, 6: 00, 12, 18) and enter autumn.

Natural Disasters The main meteorological disasters in autumn are: autumn rain in West China, cold dew wind in the south, frost and chilling injury at low temperature.

Diet reminds you to eat more acidic food in the autumn diet. The climate in autumn is dry and the temperature difference is uncertain, so it is necessary to protect the liver function of the body. In diet, it is necessary to "increase acid" to enhance the function of the liver and resist the invasion of excessive lung qi. Traditional Chinese medicine believes that autumn is a transitional period between two seasons in Xia Dong, and the temperature changes from hot to cold, so health care should also change from "nourishing yang" to "nourishing yin".

Avoid overeating. In autumn, most people tend to eat too much because of the pleasant climate and abundant food. Eating too many calories will turn into fat accumulation, which will make people fat.

Autumn diet, we should pay attention to the right amount, can not indulge appetite, eat and drink.

Avoid spicy and cold food. Avoid eating greasy and fried food. Avoid eating dry food. Avoid eating aquatic plants.