Why does the wet and cold weather in the south often make people feel colder?

Wet and cold weather refers to the weather with low temperature, much rain and little sunshine. Judging from the feeling of human body, once the low temperature in the south is superimposed with rain, it will form the magic of "wet cold", which has strong permeability and can reach the body surface through layers of coats, leading to the drop of body surface temperature, and the human body will feel "wet cold". The reason why wet cooling is colder than dry cooling is that the air humidity is high, and the water on the human surface is difficult to evaporate into the air. The liquid film staying on the skin surface increases the convective heat transfer coefficient between the human body and the outside air, and increases the heat lost by convective heat transfer, so people feel colder.

In wet and cold weather, people should pay attention to cold and warmth, and the air humidity is high. When you go out, you'd better wear a hat and knee pads to keep your clothes dry. Don't wear wet clothes. It is best not to expose the skin to the air, so as not to get cold and damp, and fall off the root of the disease. But the hands and feet should not be tied too tightly to avoid poor peripheral blood circulation and frostbite.

When the weather becomes wet and cold, the outdoor climate cannot be changed, but the indoor temperature can be adjusted appropriately. The temperature should not be too high. The most suitable indoor temperature range in winter is 17-23℃. To keep the room warm and dry, it is necessary to properly ventilate and keep the indoor humidity at about 50%.

Other things being equal, when it is cold, the greater the humidity, the colder the weather; When it is hot, the higher the humidity, the hotter it is.

The specific principle is simple. When it is cold, clothes keep you warm. Water is more conductive than air. The wetter the clothes, the easier it is to get hot. When the weather is hot, the temperature drop depends entirely on sweating. If the environment is humid, sweat evaporates slowly and dissipates slowly, the hotter it feels. Of course, the most direct difference between dry cooling and wet cooling is humidity. Dry cooling humidity is small, and wet cooling humidity is large.

The southern region basically belongs to subtropical monsoon climate with more precipitation, while the northern region is mostly temperate continental climate with less precipitation. So the air humidity in the south is much higher than that in the north.

Matters needing attention in wet and cold weather

1, pay attention to add clothes

To be equipped with winter clothes, hats, shoes, gloves, etc. Clothes, shoes, gloves, etc. Avoid dampness and keep it dry. Hands and feet should not be tied tightly, so as not to affect peripheral blood circulation and cause chilblain and frostbite. Don't wear bottoming shirts and sweaters with too big neckline at this time. Put on turtle neck and wrap a thick scarf. This is the way to keep fit in winter.

Step 2 Exercise properly

Exercise is the best way to improve your cold resistance. Continuous regular exercise habits can improve the physique of those who are afraid of the cold. Exercise can stimulate muscles, speed up blood circulation and enhance immunity.

If you can't go out to exercise because of the rain, it is also a good exercise method to play Tai Chi and do yoga at home.

3. soak your feet in hot water

Soaking your feet with hot water at 55-70 degrees Celsius before going to bed can not only relieve fatigue, but also help you sleep. Soaking in hot water can relax tendons and activate collaterals, accelerate blood circulation, and play a role in preventing and treating diseases, especially for patients with chilblain and varicose veins of feet. The optimum water temperature is generally 5 to 6 degrees higher than human body temperature, which means that it is better to keep the water temperature at 42℃. If it is too hot, it will make us uncomfortable. If it's too cold, soaking feet won't help much.