What are the characteristics of autumn?

The most obvious feature of autumn is trees. The city began to clean up a lot of fallen leaves, and many tourists flocked to the mountains to watch the maple red. The overall characteristics are that the solar altitude angle decreases and the temperature decreases in autumn; The autumn wind is cool, the summer heat is gone, the fruits are covered with branches, and the fields are golden.

In autumn, many plants mature in autumn. In the subtropical region of the northern hemisphere, the temperature in autumn is obviously lower than that in summer. As the temperature 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.

Extended data

Autumn solar terms:

1, beginning of autumn

Beginning of autumn, the 13 of the 24 solar terms, is also the first solar term in autumn, which marks the official start of the Meng and autumn seasons: "Autumn" means cool in summer. In early autumn, Beidou points southwest. From this day on, autumn began, the autumn was crisp, the moon was bright and the wind was clear. Since then, the temperature has gradually decreased from the hottest time.

2. High temperature in summer

Summer is the fourteenth of the twenty-four solar terms. Dou Zhiwu (Southwest); The solar calendar is150; August 22-24 of the Gregorian calendar every year. "Out" means termination, and the summer heat means the end of the summer heat. The dog days have passed or will soon end.

Due to the influence of short-term reheating weather (commonly known as "autumn tiger"), there is still continuous high temperature after the summer heat, and it will feel sultry. The weather will change from hot to sultry, and it will generally be cool around the Millennium.

Baidu Encyclopedia-Autumn

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Baidu Encyclopedia-beginning of autumn