What are the main features of winter?

In many areas, winter means silence and desolation. When the cold current strikes, living things will reduce their life activities, many plants will shed leaves, animals will choose to hibernate, and some are called hibernation. Migratory birds will fly to warmer places for the winter.

2, solar terms

The sun in beginning of winter is located at longitude 225, at the intersection of165438+1October 7-8;

Xiaoxue Sun is located at the intersection of longitude 240,165438+1October 22-23;

The snowy day is located on the 255, 65438+February 6-8 of the Huangjing.

The winter solstice sun is located at the intersection of longitude 270,65438+February 2 1-23;

The slightly cold sun is located at the intersection of 285, 1.5-7 on the yellow meridian.

The severe cold day is located at the intersection of longitude 300, 1, 20-2 1.

3. Meteorology

In the northern hemisphere, winter is the coldest season, and even the temperature in temperate zone may drop below 0℃. In winter, there will be snowfall in many places, and the snow and ice in most parts of the north will not melt until spring.

4. Astronomy

In winter, the direct point of the sun moves south to the tropic of Capricorn, and then turns back to the north.

Extended data:

Winter life taboo

1, avoid licking your lips often.

Some people think that chapped lips can be moistened with tongue licking, but the result is just the opposite. Saliva is secreted by salivary glands and contains amylase and other substances, which is relatively viscous. After licking your lips, it seems to be covered with a layer of paste. When the water evaporates, the lips will be drier. If your lips are dry and uncomfortable, apply lip balm without pigment and fragrance.

2. Avoid pure glycerin.

People usually use glycerol containing 20% water. If pure glycerin is used, its water absorption capacity is too strong, which will absorb the moisture in the skin, but it will make the skin drier.

3. Avoid wearing too many clothes

If you wear too much and too thick, the blood vessels in the skin will expand, and the blood flowing to the skin will increase, thus increasing heat dissipation. This reduces the body's ability to adapt to changes in external temperature.

Baidu Encyclopedia-Winter