What are the characteristics of autumn?

The characteristics of autumn are: the temperature drops gradually, the autumn wind is cool, the geese fly south, the fruits are covered with branches, and the fields are golden.

Autumn is the harvest season, the temperature is obviously lower than that in summer, and the leaves of many plants will gradually change color, wither and fall, leaving only branches. From the point of view of temperature, autumn will be cold and rainy, or dry and cool.

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.

Autumn climate:

It is autumn in beginning of autumn so far, which means that precipitation and humidity are at the turning point of the year, and there is a tendency to decrease or decrease. In nature, everything begins to grow from lush to rich and mature. 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.