Why do some people say that the south feels colder than the north?

1. There are several factors that affect people's perception of cold and warm, including temperature, humidity, wind speed and illumination. Among them, humidity has a great influence on human perception. The thermal conductivity of humid air is greater than that of dry air. When the humidity increases by 10%, the temperature people feel will decrease by 1℃, which is why people will feel colder if they stay in the south where the temperature is higher in winter.

2. The feeling of coldness comes from the nerve's reaction to heat dissipation on the body surface, and the degree of coldness depends on the speed of heat dissipation on the body surface. When your hands are soaked in cold water, immediately touching the object whose water temperature is higher than that will give you a warm feeling. Even if the temperature of that object is much lower than the body temperature, the illusion of warmth actually comes from the temperature difference between the local temperature (hand) and the object, not the temperature difference between the body temperature and the temperature.

3. In addition, the "hardware" of winter in the north and the south is also different. First of all, there is central heating in the north and not in the south; Secondly, there are differences in the external wall insulation system between north and south buildings, and the buildings in the north are generally more cold-resistant than those in the south. Cold and wet, just like that, it becomes a cycle. The colder and wetter the weather is, the more humid the air is, and the colder people will feel.

Extended data:

The temperature in the north is low, but the humidity is very small, and the skin sensitivity of pedestrians is also small; Moreover, there is often the sun during the day, and pedestrians can absorb heat from the light. In the south with high humidity and continuous rainy weather, water molecules in the air are adsorbed on the surface skin of human body, and the evaporation process will take away the heat of human body; At the same time, rainy weather makes it difficult for human body to absorb external heat.

There is heating in winter in the north, and heating in the south basically depends on air conditioning. The temperature of air conditioner can't reach the height of heating, so the indoor temperature in the south is relatively low, and the feeling of humidity will be more obvious.

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