China Weather News "There is only a pinch of cumin between me and the barbecue", "Give me ice watermelon..." Yes, it's the annual dog days, starting from July 11th, our country It will enter the hottest, humid, and sultry days of the year.

Why is Dog Days the most difficult?

Which of the "San Fu" is the hottest?

China Weather.com has launched a coup to prevent heatstroke during the dog days to help you survive the dog days and safe.

 Why is Dog Days the most difficult?

Which of the "San Fu" is the hottest?

  This year's first bust will start on July 11th, and the mid-day bust will be from July 21st to August 9th. The last bust will start on August 10th and is expected to end on August 19th, which will last forty days.

After the formal fall, the "sauna days" of high temperature, high heat and high humidity will appear frequently, and the heat will be unbearable.

  The term "San Fu" is derived from the Five Elements doctrine that prevailed in the Qin and Han Dynasties. It mainly refers to the hottest period of the year in the Central Plains climate. It is a collective term for "tou fu", "zhong fu" and "mo fu". Appears in mid-July to mid-August.

According to Hu Xiao, chief meteorological analyst of China Weather Network, dog days are characterized by obvious high temperature and high humidity, a large number of accumulated days, and strong continuity.

  How hot is it in dog days?

China Weather.com has collected meteorological data for the past 30 years (1991-2020). The extreme high temperature in northern China, Huanghuai, and the eastern part of Northwest China in the dog days is above 40℃, and the high temperature lasts for 5-7 days. Due to the high humidity, the extreme high temperature is not as strong as in the north, but it has great endurance. The number of high temperature days is more than 20 days, and even up to 35 days locally.

Turpan, the "Hot Overlord" I have to mention, had an extremely high temperature of 47.8°C (August 5, 2008), and the number of high-temperature days lasted for 39 days, almost a high-temperature grand slam.

  Is the ancient sanfu also so hot?

Historical climate research shows that the hottest summer in my country's history occurred in the eighth year of Qianlong.

"China's Three Thousand Years of Meteorological Records" stated that at that time, the entire North China region, including Beijing, Tianjin, Hebei, Shanxi, and Shandong, was extremely hot; the actual temperature recorded by French missionaries in Beijing that year (1743) was July 20-25 The daily temperature value is higher than 40 ℃, which reached 44.4 ℃ on July 25.

It makes people feel emotional: "How did people survive the era without air conditioning?"

  Why is the dog days so difficult?

According to Hu Xiao, after entering the volts, the surface humidity increases and the surface heat accumulates, so it gets hotter day by day, and the heat accumulation on the ground reaches the 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 specific heat capacity of water is much larger than that of dry air, which is also an important reason for the sultry weather.

The subtropical high pressure strengthens in July and August. Under its control, the sinking airflow inside the high pressure makes the weather clear and less clouded, which is conducive to sun exposure, and the ground radiation heats up, making the weather even hotter.

  Which of the "San Fu" is the hottest?

Hu Xiao said that in a certain year or a certain region, whether the highest temperature appears in the first, middle, or last, or whether the "autumn tiger" will appear after the beginning of autumn, actually depends on the weather system at that time.

Normally, in my country's mainland, the heat is mainly at the top and middle, but most of the southeast coast and island areas are hot at the end.

Even in the middle and lower reaches of the Yangtze River, which are usually hot in the middle and lower reaches of the Yangtze River, in mid-to-late August after the end of the fall, there may occasionally be continuous high-temperature weather called the "autumn tiger".

 The correct way to open the dog days: heatstroke prevention and cooling

  When the weather is hot, many people think that "Futian should be dedicated to preventing heatstroke." In fact, it is "cold" that Futian should be more careful about.

Taking cold showers, blowing on the air conditioner for a long time, drinking iced cold drinks, etc. are all the root causes of cold air entering the body.

  Hu Xiao suggested that the temperature of the air conditioner should be adjusted to about 26℃ in Futian. When the air conditioner is not turned on, pay attention to opening the window for ventilation. Exercise in Futian is gentle. You can choose to go outdoors before 10 o'clock or after 5 o'clock in the afternoon to make your body sweat slightly. Pay attention to hydration after exercise, and it is best not to drink beverages with a lot of sugar; pay attention to the diet to avoid coldness, so as not to cause stomach cramps.

  Although the dog days are really hot enough for us, it is actually a normal climatic phenomenon. Every year we should welcome it and deal with it with a peaceful mind.

Prevent heatstroke, don't be greedy for cold; eat more bitter gourd and less cold drinks; in short, as long as we respond positively and correctly, we can all live through the hurdles healthily and safely.