Beginning of winter means wind and rain, humidity, light, temperature and so on. At a turning point, the climate begins to transition from autumn to winter. In winter, everything is collected. After beginning of winter, everything began to hide.
Introduction to winter
In winter, the light and heat energy of the sun will enter the least season of the year. Because there is not enough light and heat energy in the northern hemisphere, the air in high latitudes will be cooled down and accumulated, and the last cold wave will go south. After winter, a relatively stable winter circulation has basically formed in East Asia, and the Pacific subtropical high has retreated to the south of 20 degrees north latitude.
The westerly belt will be divided into the north westerly wind and the south westerly wind on the Pamirs, and the north westerly wind will send the water vapor from the Mediterranean Sea and the North Sea to Tianshan for snowfall.
The south branch westerly wind forms a south branch trough on the south side of the Qinghai-Tibet Plateau and turns to the Bay of Bengal to transport the water vapor from the Bay of Bengal to the central and eastern regions of China. When the cold air in the north branch trough meets the warm and humid air in the south branch trough, it will form low-temperature rain and snow weather.