Why is it so hot during the dog days? Can you swim during the dog days?

The dog days are hot mainly because they are the hottest time of the summer. On the one hand, the humidity on the surface increases, the heat absorbed every day is more, the heat dissipated is less, the accumulated heat reaches the peak, and the weather is very hot. On the other hand, the subtropical high pressure in summer strengthens, the ground radiation warms up, and the weather is even hotter. Although the dog days are hot and unbearable, the diet should not be too light, because people sweat a lot in summer and consume a lot. You should eat more nutritious foods such as meat and eggs to maintain physical activity. Swimming in the dog days can prevent heatstroke and cool down, because the speed at which the human body dissipates heat in water is twenty times that in the air. The heat generated by the human body in water is less than the heat dissipated to the outside, which can have a good cooling effect.

Contents of this article

1. How are the dog days of summer calculated?

2. Why is the dog days so hot?

3. Can I swim during the dog days of summer?

How are the dog days of summer calculated?

The dates of the three hottest days are calculated by combining the solar terms of the Ganzhi calendar with the dates of the Ganzhi calendar. According to the traditional calendar, the third Geng day after the summer solstice is the beginning of the hottest days, the fourth Geng day is the beginning of the middle of the hottest days, and the first Geng day after the beginning of autumn is the beginning of the last of the hottest days.

The three hottest days of the year mostly occur between the Lesser Heat and the End of Heat. It is the time of the year with the highest temperature, humidity and stuffiness. The word "fu" means that the yin energy is forced by the yang energy to hide underground. There are three types of fu: the first, second and third fu.

The length of the dog days mainly depends on the difference between the middle dog days. Because the time of the first dog days after the summer solstice may be different every year, the number of days in the middle dog days may also be different. It may be 10 days, 20 days, or even longer.

During the dog days of summer, the climate in southern my country is characterized by high temperature and high humidity, while the climate in northern China is characterized by high temperature and dryness.

Why is it so hot in the dog days of summer?

The dog days are hot mainly because they are in the hottest season of summer. On the one hand, it is because the surface humidity increases, absorbing more heat and dissipating less heat every day, so the accumulated heat reaches its peak and the weather is very hot. On the other hand, it is because the subtropical high pressure strengthens in summer, the ground radiation warms up, and the weather becomes even hotter.

The dog days of summer last about 40 days each year. Their climatic characteristics are high temperature, low air pressure, high humidity and low wind speed, which make the human body easily feel hot and stuffy.

During the dog days of summer, the sun's strongest rays are generally from 10 a.m. to 3 p.m. So try to avoid going out during this time. If you need to go out, it is recommended that you take sun protection and heatstroke prevention measures.

Although the dog days are unbearably hot, the diet should not be too light, because people sweat a lot and consume a lot in summer. You should eat more nutritious foods such as meat and eggs to maintain physical activity.

Can I swim during the dog days of summer?

You can swim in the dog days of summer. It is best to choose an indoor swimming pool to swim, which can prevent heatstroke and reduce body temperature, because the body dissipates heat in water 20 times faster than in the air. The heat generated by the body in water is less than the heat dissipated outside, which can have a good cooling effect.

It is best to wear swimming goggles with good sealing performance when swimming. You can put some eye drops after swimming. If your eyes have adverse symptoms such as itching and redness, it is best not to go swimming for the time being.

The swimming time should not exceed two hours. After getting ashore, you should rinse with clean water in time. After drying your body, apply some moisturizing skin care products, such as body lotion.

It is best to use swimming earplugs when swimming and use a nose clip to prevent choking. Cleaning the outer ear wax before swimming can effectively prevent pain and inflammation caused by soaking the ear wax.