Characteristics of autumnal equinox What are the main characteristics of solar terms?

The autumnal equinox is the solar term after the Millennium solar term among the 24 solar terms in China, and it has already entered the autumn climate. What are the characteristics of autumnal equinox? What are the characteristics of the autumnal equinox solar terms?

Beginning of autumn is beginning of autumn, the first frost is late autumn, and the autumnal equinox is exactly half of the 90 days from beginning of autumn to the first frost. At the autumnal equinox, the Yangtze River basin and its vast northern area have entered autumn, and the daily average temperature has dropped below 22℃.

The cold air mass in the north began to have some influence. In most areas, the rainy season has just ended, with a cool breeze blowing gently, the sky is high and the clouds are light in Wan Liqing, the air is crisp in autumn, the sweet-scented osmanthus is fragrant, the crab is fat and the chrysanthemum is yellow, and the autumn equinox is a beautiful and pleasant season. It is also an important solar term in agricultural production. After the autumnal equinox, the direct sunlight moved to the southern hemisphere, and the northern hemisphere got less and less solar radiation, while the ground lost more heat and the temperature dropped significantly.

At this time, the waiting temperature in the southern region has generally dropped below 22℃, and it has entered a cool autumn. An autumn rain and a cold. The cold air from the south meets the warm and humid air that gradually decays, resulting in repeated rainfall and the temperature dropping again and again. In the northern part of the northwest plateau, the daily minimum temperature has dropped below 0℃, and you can already see the magnificent snow scene flying all over the sky and the earth wrapped in silver. It is rainy and humid in autumn in the south and Liangshan Prefecture, which has great influence on autumn harvest, autumn ploughing and autumn planting.