Why are the days long and the nights short after the solstice in winter?

The day starts early and the night starts late.

The winter solstice around 65438+February 2 1 is the shortest day and the longest night in the northern hemisphere. After this day, the whole northern hemisphere has longer days and shorter nights. The length of a day is divided into morning and afternoon at 12. The two parts are equal in length. If the days get longer, the afternoon will get longer.

Because the sun shines directly on the tropic of Capricorn after the winter solstice, the sun moves south, and its light depends on its position. In winter, the farther north the sun moves, the farther north the direct point of the sun is. So China is in the northern hemisphere, so the days are short and the nights are long in winter.

Because the earth's axis is inclined, the length of day and night varies in different parts of the earth. In the polar regions of the earth, the sun is skewed all year round, and the length of day and night changes the most.

In the high latitudes of the northern and southern hemispheres, the sun does not set or rise all day. In other words, 24 hours a day is either day or night. In the polar regions, this is called extreme day and night. In the North Pole and South Pole, there are six months of days and nights.

Extended data:

Climatic characteristics:

The arrival of the winter solstice marks the beginning of winter. The northern hemisphere receives the least solar radiation, about 50% less than the southern hemisphere. However, this is not the coldest time. The so-called cold is on March 9 and April 9. This is because there is atmosphere and water on the surface of the earth, which can store heat. It is not a question of being or losing, but a question of accumulating heat.

Therefore, the weather is usually not very cold before the winter solstice. After the winter solstice, although the solar altitude angle gradually rises, it is a slow recovery process. The heat lost every day is still greater than the heat received, showing a weak situation.

On March 9 and April 9, the product will be the least hot and the lowest temperature, and the weather will be much colder. It will be colder if there is cold air. After the cold front, the weather will gradually get warmer.