Why don't people freeze water in spring?

Almost all the heat on the earth's surface comes from sunlight, but the energy directly absorbed by air from sunlight is not much. The energy of sunlight is first absorbed by the ground and converted into heat energy, and then heat is conducted from the ground to the air. Therefore, the closer to the ground during the day, the higher the temperature, and the earlier the snow and ice melted under the sunlight.

Ice and snow need to absorb a lot of heat in the air during the melting process, which makes it impossible for the temperature near the ground to rise rapidly during this period, so people still feel very cold. It looks warm, but in fact people still feel quite cold, especially in early spring. This is often said that people don't freeze water in spring.

Extended data:

Precautions:

1, keep warm in spring: the climate changes greatly in spring, especially in early spring, when cold waves often strike. As the saying goes, beginning of spring should keep warm, and it is easy to catch a cold if you are not careful. Although the cold is a small problem, it will also cause many complications if it is not treated in time or improperly.

2. As the temperature rises gradually, you should go to bed late and get up early in your work and rest. You should also choose suitable outdoor activities according to your age and physique. Walking and jogging, flying kites and jogging are all good choices. Older people can even play Tai Ji Chuan and Tai Chi Sword together.

3. It should be noted that when there is little exercise in winter, human function will decline to some extent. Therefore, warm-up exercise should be done before exercise, not too intense, and attention should be paid to sweating and catching a cold after exercise.

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