The autumnal equinox is coming soon. What is the solar term after the autumnal equinox? The climate characteristics of the autumnal equinox, will it be very cold?
What is the solar term after the autumnal equinox: Cold Dew solar term.
The cold dew solar term is the seventeenth of the twenty-four solar terms and the fifth in autumn. When the cold dew solar term comes, the sun reaches the Yellow meridian 195° The weather began to get colder and colder. The ancient book "the collection of the seventy-two seasons of the moon" said: "on September day, the dew is cold and will condense." It means that the temperature of cold dew is lower than that of White Dew, and the dew on the ground is colder and is about to condense into frost.
The first solar term after the autumnal equinox is cold dew. The cold dew solar term is a deepened version of the White Dew solar term. The White Dew solar term is that the temperature drops, and the cold air condenses into water vapor, which is displayed in the form of water droplets near the ground. When the cold dew, the temperature drops again, not only white water droplets, but also very cold when staying in the morning and evening.
Climatic characteristics of autumnal equinox:
In autumn, the daily average temperature is below 22 ℃
At the autumnal equinox, the Yangtze River Basin and the vast areas to the north of China have successively entered autumn, and the daily average temperature has dropped below 22 ℃. The northern air-conditioning group began to have a certain influence. In most areas, the rainy season has just ended. The cool wind is blowing, the blue sky is thousands of miles, the wind is sunny, the autumn is crisp, the sweet smell of Dangui, the fat crab and chrysanthemum are yellow, and the autumnal equinox is a beautiful and pleasant season.
The ground heat dissipates much and the temperature decreases rapidly
After the autumnal equinox, the position of direct sunlight moves to the southern hemisphere. The northern hemisphere gets less and less solar radiation, while the ground loses more heat, and the speed of temperature reduction is significantly accelerated. Agricultural proverbs say: 'an autumn rain is a cold', 'White Dew autumn night, a cold night' The Yanmen gate opens in August, and the geese bring frost at their feet. It is not surprising to see frost at the autumnal equinox.
Cold air heading south
On the autumnal equinox, the sun is located at 180 degrees of the Yellow longitude, the sun is almost direct at the equator, and the day and night are almost the same length. At this time, the temperature in the South generally dropped below 22 ℃ and entered a cool autumn. " An autumn rain, a cold '. The cold air going south meets the gradually decaying warm and humid air, resulting in rainfall and temperature drop again and again.