1, the snow is too late for spring, and it is flying through the courtyard trees. -Han Yu's Chun Xue
2, the green is not exhausted, the willow is white-eyed, the red is about to break, and the apricot is dull. -Shi Dazu's "The First Branch of Dongfeng Wing Chun Snow"
3, Blue Bridge Chun Xue Jun returned to Japan, Qinling Autumn Wind I went. -Bai Juyi's "Blue Bridge Post See Yuan Jiu Poetry"
Chun Xue is full of air, and it feels like it is blooming. -Oriental Qiu "Chun Xue"
5. In order to report the spring breeze and snow, wicker can't help getting cold at first. -Rong Yu's Early Spring in the Snow
6, ask what the sky means, to the depth of spring, thousands of miles of Longshan flying snow? -Chen Zilong's "Nian Nujiao Chun Xue Yong Lan"
7. The snow is gone outside, Qian Shan is green, and bloom is blooming along the river in February. -Ouyang Xiu's Song of Cao Xie West Lake in Spring
Formation of snow
Water vapor in the atmosphere condenses directly or water droplets condense directly, which is snow. It can also be said that it snows when the temperature in the cloud is too low and small water droplets form ice crystals and fall to the ground or snow. Ice absorbs heat when it melts, so the ground temperature will be lower than when it snows.
The atmosphere needs to contain cold ice crystal nuclei and sufficient water vapor, below 3.0℃ (freezing point). If the cold air is quite strong and carries moisture, it can snow at the temperature of 1℃ to 10℃. There will be opportunities for snowfall where the climate zone belongs to the middle latitude to the high latitude (that is, the area south of the Tropic of Cancer or around the north of the Tropic of Cancer), and there will be the same opportunities if there are some topography in Zhongshan or Plateau with an altitude of more than 2000 meters in the low latitude area.