Please tell me what are the characteristics of winter?

Feature 1: Cold

Winter is the coldest season of the year. The outdoor temperature will reach minus 10-20℃ in winter in the north, and the cold winter will cause the river to freeze. People will wear thick cotton-padded clothes, gloves, scarves and hats to keep out the cold.

Feature 2: It snows

It snows only in winter. It's white here, the air is fresh and comfortable, it's usually very cold when it snows, and there are no animals crying. The snow in the south is like small particles, and the snow in the north is like tearing cotton, which is big and dry. Ice will hang on the low eaves.

Feature 3: Short days and long nights.

Compared with summer, winter is characterized by short days and long nights. The winter solstice is the longest and shortest day in the northern hemisphere, and it has entered a "cold day" since the winter solstice. After the solstice of winter, day and night will gradually become the same length. An intuition, they think it should be done.

Extended data

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. The subtropical high has retreated to the south of 20 degrees north latitude in the Pacific Ocean, and the westerly belt has been pressed to the south of 35 degrees north latitude. The westerly belt will be divided into north branch and south branch in Pamirs. The Northern Branch will send the water vapor from the Mediterranean Sea and the North Sea to Tianshan Mountain, forming snowfall. After snowfall, the air will cool down and accumulate in depth, forming cold air southward at the trough on the east side of the Qinghai-Tibet Plateau.

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.