Why is Dog Day the hottest? Why is Dog Day the hottest?

The Dog Days occur between the Slight Heat and the Autumnal Equinox. They are the season with the highest temperature in the year. After the Dog Days enter, the surface humidity increases, absorbing more heat and dissipating less heat every day, so the day will be longer than It's a hot day.

The reason why the dog days are the hottest

After the dog days enter, the surface humidity increases, absorbing more heat and dissipating less heat every day. The heat on the surface layer accumulates, so it gets hotter day by day. , entering the third volt, the accumulated heat on the ground reaches its highest peak, and the weather is the hottest. In addition, there is a lot of rain in summer, the air humidity is high, and the heat capacity of water is much greater than that of dry air, which is also an important reason for the muggy weather. The subtropical high pressure strengthens in July and August. Under the control of the subtropical high, the downdraft inside the high pressure makes the weather clear and less cloudy, which is conducive to sunlight. The ground radiation heats up, making the weather hotter.

What are the Dog Days?

The Dog Days occur during the Minor Heat and the Autumn Equinox. They are the hottest, humid and sultry days of the year. The so-called "Dog Days" refers to the "Dog Days" of the lunar calendar, which is the hottest period of the year. It can be understood this way: "F" means that the weather is too hot and it is better to stay down than to move. But the reason why the dog days of summer are called "dog days" is because there are also many cold factors involved. Sanfu is the hottest three to forty days of the year in the Central Plains. Sanfu is calculated according to the lunar calendar, and it is approximately between mid-to-late July and early August in the solar calendar.

Common knowledge on heatstroke prevention in the dog days of summer

1. In summer, strenuous activities such as mountain climbing and outdoor activities during the day are not recommended. It is recommended to choose sports activities such as swimming and jogging in the morning and evening.

2. Drink more boiled water, and drink water regularly. Do not wait until you are thirsty before drinking. It is not advisable to drink too much after you are thirsty. You should drink less juice, soda and other beverages, which contain more saccharin and electrolytes. Drinking too much will cause adverse irritation to the gastrointestinal tract and affect digestion and appetite.

3. It is not advisable to drink excessive amounts of alcohol. The human body is easily affected by the temperature in summer, and it is easy to accumulate dampness and heat. Excessive dampness and heat is the cause of skin sores and carbuncles. Drinking a lot of liquor will increase heat and dampness, which is tantamount to adding fuel to the fire.

4. The diet should not be too light. In summer, people are active for a long time, sweat a lot, and consume a lot of energy. They should eat more nutritious foods such as chicken, duck, lean meat, fish, and eggs to meet the metabolic needs of the human body. Summer seasonal vegetables, such as lettuce, cucumbers, tomatoes, etc., have a high water content; fresh fruits, such as peaches, apricots, watermelons, melons, etc., have a water content of 80 to 90%, and can be used to replenish water.

5. The nap time should not be too long. If the nap time is too long, the central nervous system will be further inhibited, and the relative reduction of blood flow in the brain will slow down the metabolic process, causing the whole body to feel uncomfortable and more sleepy after waking up.

6. Avoid "rapid cooling" after being heated. In hot summer, when people go out or return from work, they like to either turn on the fan or take a cold shower immediately. This will quickly close the pores in the body and make it difficult for the body's heat to dissipate. It will also cause insufficient blood supply to the brain due to rapid contraction of blood vessels in the brain, causing People feel dizzy.

7. The temperature difference between the indoor and outdoor air conditioners should not be too large. It is advisable to use an air conditioner where the indoor and outdoor temperature difference does not exceed 5 degrees. Even if the weather gets hotter, the indoor temperature of the air conditioner should not be lower than 24 degrees.

8. It is not advisable to wear metal jewelry. If some metals in metal decorations are stained with sweat, the skin in contact may appear reddish or itchy, which can easily lead to contact dermatitis.

9. Remember to prepare sun protection equipment when going out in summer. It is best not to walk in the scorching sun between 10 am and 4 pm. If you must go out at this time, you must take protective measures, such as using a parasol, wearing a sun hat, wearing sunglasses, and preferably apply sunscreen.

10. Live a regular life, avoid staying up late frequently, and ensuring adequate sleep are also effective measures to prevent heatstroke. Be careful not to lie under air conditioner vents or fans when sleeping.

11. Always carry heatstroke prevention and cooling medicines with you when you go out, such as Dishui, Rendan, Fengyoujing, etc., for emergency use.