It's about to start spring. For my friends, I can't help but feel excited. However, there is a saying among the people in our country that they should wear more clothes in spring. Do you know why? 'spring cover' means that in spring, the temperature just turns warm, so don't take off the cotton padded clothes too early.
Is there a scientific basis for spring and autumn?
In winter, after wearing cotton clothes for several months, the regulation of heat production and heat dissipation of the body is in a relatively balanced state with the ambient temperature in winter. From winter to early spring, it turns warm and cold at first, and the temperature changes greatly. As the saying goes, "a child's face changes three times a day in spring". Take off the cotton padded clothes prematurely. Once the temperature drops, it will be difficult to adapt, which will reduce the body's resistance. The pathogen takes advantage of the deficiency to attack the body, which is easy to cause various respiratory diseases and infectious diseases in winter and spring.
Four standards of chunwu
air temperature
Spring should be judged according to the temperature. 15 ℃ is the critical temperature of spring cover. The research shows that 15 ℃ can be regarded as the critical temperature of cover and not cover for children, the elderly and other people who need "spring cover". That is to say, when the temperature lasts above 15 ℃ and is relatively stable, it can be left out.
Temperature difference
The temperature difference between day and night is more than 8 ℃. The temperature in spring, the day before yesterday, was still warm with spring wind and flowers blooming. In an instant, the cold current might surge and 'flowers blooming and being blown down by the wind', making you aftertaste the winter's killing. In the face of the ever-changing temperature of spring, parents should add and subtract clothes for their children as the weather changes. When to add clothes? Now, it is considered that the temperature difference between day and night is greater than 8 ℃ as the signal to cover.
Opportunity
24-48 hours before the arrival of cold air needs to be prepared. Medical meteorologists have found that the peak incidence of many diseases is closely related to the southward movement of cold air and the duration of cooling. The most obvious is the cold, dyspepsia, before the arrival of cold air convenient foot first. Therefore, the best time to cover should be 24-48 hours before the arrival of the cold air forecast by the meteorological station, and if it is late, it will be like an umbrella.
Duration
Spring covers 7-14 days just right. As the temperature rises, the clothes under cover will always decrease. But the clothes should not be cut too fast, or there will be no 'cover' in place. How to get it in place? Medical experts found that: the temperature needs to be covered with clothes to keep out the cold. Even if the temperature rises after that, it will take another 7 days or so for the weak children and the elderly to adapt. It's possible that they will get sick if they take off their clothes too fast.