What is the relationship between temperature and ground temperature? How to convert

There is no direct correspondence between air temperature and ground temperature. Generally, the results are obtained by direct measurement without conversion.

Ground temperature generally refers to the atmospheric temperature above the ground 1.25-2.0 meters. When measuring, in order to prevent the influence of solar radiation on the observed value, the temperature measuring instrument must be placed in the shutter or radiation protection cover, and the measuring element must be well ventilated. The ground temperature should be measured with a special geothermal meter.

Extended data:

1. There are three main factors affecting the temperature distribution, namely latitude, land and sea and height. However, when drawing the isotherm map, the temperature value is often corrected to the same height, that is, sea level, to eliminate the height factor, so as to show the latitude, land and ocean more clearly.

In different seasons of the year, the temperature distribution is different. Usually 1 month represents winter in the northern hemisphere and summer in the southern hemisphere, and July represents summer in the northern hemisphere and winter in the southern hemisphere.

2. Knowledge related to ground temperature

(1) Geothermal gradient: geothermal increment per 100 m in the warming zone.

(2) Normal geothermal gradient: the gradient is less than or equal to 30C/hm.

(3) Abnormal geothermal gradient: the geothermal gradient exceeds 30C/hm.

(4) Geothermal high temperature area: the area where the geothermal temperature exceeds 400℃ (the geothermal temperature of 3 1-37 degrees is the first-class heat damage area, and the temperature above 37 degrees is the second-class).