What winds blow in autumn? What are the characteristics of autumn? ~ ~ ~ ~ urgent ~

The north wind usually blows in autumn in our country. In autumn, the weather turns cold, the temperature difference between day and night is large, the leaves gradually turn yellow, crickets sing obviously, there is dew in the morning after the Mid-Autumn Festival, the days are getting shorter and shorter, the maple leaves are red, the fruits are numerous, and the crops are bumper.

Most plants in autumn will lose their leaves, and the leaves of plants will change from green to yellow or red, which is related to the pigments contained in the leaves.

The temperature will gradually drop in autumn, generally slower than in winter. Due to the difference of dry and wet conditions, cold and rainy weather conditions or dry and cool weather conditions appear in different regions. In the cold late autumn, due to the large temperature difference between day and night, the water vapor transpiration during the day will condense at night, either dew or frost.

In autumn, the direct point of the sun gradually moves south from the northern hemisphere, passes through the equator after the autumnal equinox, and the sun shines directly into the southern hemisphere. Seen from the northern hemisphere, the angle of the sun gradually becomes lower, and the gap between day and night becomes smaller. At the autumnal equinox, the length of day and night is equal. In autumn, the distance between the earth and the sun is from far to near.

Extended data:

In China, traditionally, "beginning of autumn" in the 24 solar terms is taken as the starting point of autumn. Entering autumn means that rainfall and storms tend to decrease or decrease, and everything in nature begins to mature from lush.

At present, the four seasons are often divided according to the temperature change, and the division of "climate average temperature" by modern scholar Zhang Baokun is adopted. According to the weather average temperature method, the daily average temperature for five consecutive days is between 10℃-22℃. Entering autumn means that the hot weather has passed and it is beginning to cool down.