The moral of the ancient vernal equinox season?
The vernal equinox is one of the solar terms reflecting the changes of the four seasons and the fourth of the 24 solar terms.
In ancient China, beginning of spring, Changxia, beginning of autumn and beginning of winter were used to indicate the beginning of the four seasons. The vernal equinox, summer solstice, autumn equinox and winter solstice are in the middle of each season. On the vernal equinox, the sun shines directly on the equator, and the time between day and night is equal all over the earth. Therefore, the ancient vernal equinox and autumnal equinox are also called "equinox", and there is a folk proverb that "vernal equinox and autumnal equinox are equally divided day and night".
Equinox has two meanings. First, it refers to "vernal equinox and autumnal equinox, which are equally divided day and night". On the vernal equinox, the sun shines directly on the equator, which is almost equal to the length of day and night in the world, that is, the time of day and night is equal, which is 12 hour. At this time, after half a year of darkness, the North Pole saw the sunshine for the first time on this day, and the corresponding South Pole will also bid farewell to the sunshine on this day.
After the vernal equinox, the position of the direct sunlight point moves to the north, and the day time in the northern hemisphere becomes longer and the night time becomes shorter, but the difference is that the day time in the southern hemisphere becomes shorter and the night time becomes longer.
The vernal equinox represents the second meaning: it is not cold.
With the arrival of the vernal equinox, the weather is no longer cold, the shock has passed, and most areas have ushered in a bright spring. At this time, day and night are equal, but they can't completely relax, and there is still the possibility of cold spring.
During the vernal equinox, the daily average temperature in all parts of China rose steadily to above 0℃ except the alpine mountain area and the area north of 45 north latitude. At this time, the cold has passed and the temperature has risen rapidly, especially in North China and Huanghuai Plain. The daily average temperature rises to above 10℃ almost at the same time as the rainy areas along the Yangtze River and the south of the Yangtze River, entering a bright spring.
On the vast land, the shore is Liu Qing.
Green, Fei Ying grass grows, wheat is jointing, rape is fragrant, peach blossom is red, Li Bai welcomes spring, and South China is a scene of late spring.
The vernal equinox stands for the third meaning: a mild climate.
After the vernal equinox, the temperature rose obviously and the precipitation increased. Except for some parts of northern China, many areas have entered a bright spring, but sometimes there will be spring drought and late spring cold. Except for the severe winter all the year round.
Except for the cold mountain area and the area north of 45 north latitude, the daily average temperature in all parts of China has steadily increased to above 0℃.
At this time, the cold has passed and the temperature has risen rapidly, especially in North China and Huanghuai Plain. The daily average temperature rose to above 10℃ almost at the same time as the rainy areas along the Yangtze River and the south of the Yangtze River, and it entered a beautiful spring, but at this time South China was a scene of late spring.