What does it mean to walk on the ice in 3949?

Lead: The folk song "99-99" still affects people's judgment on the weather. The ballad goes like this: "1929 did not move, walked on the ice in 3949, saw the willows in 5969, opened the river in 799, and the geese came in 899, and the cows went everywhere." Although familiar, most young people still don't understand the real meaning. What does it mean to walk on the ice in 3949? Let me give you a lesson in science.

The significance of walking on the ice in 3949

The significance of walking on the ice in 3949 was that on the third and fourth nine days, the weather was coldest, and even the river was frozen, so it was possible to walk on it.

"Nine" is a customary folk solar term in China lunar calendar, including "Nine in Winter" and "Nine in Summer", among which "Nine in Winter" is widely spread. "Nine-Nine in Winter" is also called "Counting Nine". From the winter solstice, every nine days is a nine, and the eighty-first day of the "nine-nine" is the "nine-nine", in which March 9 and April 9 are the coldest seasons of the year. As the saying goes in the countryside, 1929' s Song of Eliminating Cold "says, 1949 walks on the ice, 1969 looks at the willows by the river, 1979 opens the river, 1999 swallows come and cows go everywhere.

1929 Don't do this: 1929 It's already very cold after the solstice in winter, so when you feel cold outside, you can't help putting your hands in your pockets. Hand frostbite usually occurs in 1929. Be sure to wear gloves and take protective measures when going out. 1929 As long as frostbite does not occur, it rarely happens.

Look at the willows by the river.

Walking on the ice in 3949: In 3949, it was the coldest season of the year, and the river was frozen so thick that adults and children could walk on it. In addition, due to the great difference in climate in China, the opinions in 3949 were slightly different. For example, in 3949, dogs were frozen in Jilin, and in 3949, Jiangsu patrolled the streets for the elderly who picked up feces.

Looking at the willows by the river in May, 1969: By May, 1969, the coldest time had passed, the weather began to get warmer, and the branches of willows began to sprout green buds, which seemed greener from a distance. The green spring not only brings warmth to people, but also brings infinite hope. In terms of time, the last day of May 9th is the "beginning of spring" in the 24 solar terms, which means that winter is over and spring is coming.

The river opens in July and September, and swallows come in August and September: In July and September, the ice and snow begin to melt, and the frozen river surface will slowly thaw, and you will hear the gurgling sound of running water. In August and September, swallows will fly back from the south to nest and start a new round of busy and endless cycle. In addition, some people say that geese fly to the north in August and September, but there is not much difference between "geese come" and "geese come".

1999 and 19 years, cattle were plowed everywhere: by 1999, the weather was warmer than before, and the second day of 1999 was a "sting" among the 24 solar terms. The sting woke up, the weather turned warmer, and there was a spring thunder gradually. Most parts of China have entered the spring ploughing season. Although spring ploughing will be more difficult, the new season represents new hope and a new beginning. Ploughing cows (tractors) everywhere always gives people the feeling of infinite vitality.

Why is "March 949" the coldest time of the year in China?

It depends on the heat absorbed by the ground during the day and the heat emitted at night. Before the winter solstice, the earth emits less heat than it absorbs and accumulates. After the solstice in winter, although the direct point of the sun gradually moves northward, it is still far from our northern hemisphere, and the night is still longer than the day. At this time, the heat received by the ground is still very small, and the heat emitted is relatively large, so the temperature is still falling.

Even in the "3949" period, the heat absorbed by the ground was still less, and the heat emitted by the ground was still more than the heat absorbed. The temperature near the ground continues to drop. When the heat absorbed by the ground is almost equal to the heat emitted by the ground, the temperature reaches the coldest degree.

In "99 Songs", it is sung: "Look at the willows by the river in May, 969". It can be seen that in the northern hemisphere, generally speaking, after the temperature reached the lowest point in a year, it began to turn around in May and June of 1999, and the heat absorbed by the ground began to exceed the heat lost by the ground, and the ground temperature began to rise gradually.

Song of 99 reflects the process from cold to coldest in a year, and the phenological phenomenon reflected in 3949 just shows that 3949 is the coldest period in our country.