When it comes to winter, the first thing we think of is cold. So, is it cold in the South or cold in the north? This topic once again set off a heat. As we all know, the cold in the north is called dry cold, while the cold in the south is wet cold. Which is colder, wet cold or dry cold?
Is it cold in the South or in the north in winter
Is it cold in the South or in the north
In the absence of heating, from the analysis of somatosensory index, generally, the lower the relative humidity and the greater the wind speed, the lower the somatosensory temperature can be obtained, so it will be colder in the north.
The specific analysis is as follows:
In winter in the south, the relative humidity is often more than 70%, higher in cloudy and rainy weather, and the wind is generally not strong. Most of the wind in the north is about level 2 and 3, and the air is dry. According to the somatosensory temperature formula of the Central Meteorological Observatory, when the relative humidity reaches 70%, the somatosensory temperature is actually 2.6 ℃. In the north, if you want to reach the same somatosensory temperature under the same temperature conditions, you need to hang strong winds of force 7 and 8. However, in winter in the north, strong winds of force 5 and 6 are rare, and strong winds of force 7 and 8 are even rare. Which is colder, wet or dry?
70% relative humidity is common, but strong winds of magnitude 7 and 8 are not common. In this way, under the same temperature conditions, the south is more vulnerable to wet and cold magic attacks, while the north is relatively less likely to encounter cold wind.
Wind force and relative humidity are the most important meteorological factors affecting somatosensory temperature besides air temperature. The effect of wind on body temperature is mixed, while air humidity always plays a counter effect.
Generally, regardless of winter and summer, the greater the wind, the lower people's somatosensory temperature is than the actual temperature. Wind is essentially the flow of air. When the air flows quickly, it will quickly take away the heat of human skin. The greater the wind speed, the faster and more heat the human body loses. This is why when the temperature is the same, windy days make people feel colder than when there is no wind or breeze.
Moist air contains a lot of moisture, and the thermal conductivity of water is greater than that of dry air, so the thermal conductivity of moist air is also greater than that of dry air. In winter, due to the low temperature around and the better thermal conductivity of humid air, the heat of human body is continuously transmitted to the surrounding air, feeling colder and colder.
Wet and dry cooling
In a word, for the little friends in the north, it is the best way to get warm indoors. No matter how cold the wind is outside, they immediately feel the warmth of spring all the year round as soon as they enter the house, while the wet and cold in the south is 360 & deg; All round attack, so that you have nowhere to hide, from morning to night, outdoor cold, indoor colder.