What does the somatosensory temperature mean in the weather forecast?

Somatosensory temperature refers to the body temperature index felt by human body, which will be affected by temperature, wind speed and relative humidity when converted into the same temperature.

Because the somatosensory temperature will be affected by temperature, humidity and wind speed, this value is also called "temperature-humidity-wind index". 1958 Paul Sciple of the United States once said that the heat loss of human body caused by wind is directly proportional. According to this statement and the formula for calculating the wind chill index at that time, the following formula is simplified:

Sensory temperature (C) = temperature (C)-2 √ wind speed (m/s).

Extended data somatosensory temperature principle;

The heat absorption of air will be affected by relative humidity and its density; Wind speed will affect the air composition in contact with human body surface. When the wind speed increases, the air that comes into contact with the human body will increase, so the heat it takes away or brings will also increase accordingly. This phenomenon is called "wind chill index". Therefore, in the weather report, the influence of these two variables will be calculated into the "very hot index". Generally speaking, when the air density and humidity increase, the thermal index will increase.

The human body is immersed in water molecules in the air, so water molecules with a temperature higher than the body temperature will hinder the heat dissipation of the human body, while water molecules with a temperature lower than the body temperature will accelerate the heat dissipation of the human body. The higher the humidity, the higher the concentration of water molecules in the air, and the more obvious the effect caused by water molecules.

References:

Baidu encyclopedia-somatosensory temperature