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根据自然环境下地表的热平衡方程，建立了计算地表热红外辐射特性的理论模型．利用温湿耦合原理，对地表热特性及辐射特性随含水量的变化给予了充分的考虑．给出了不同地表辐射温度的周日模拟计算结果，并进行了对比和分析，结果表明，在相同的自然环境下，不同地表的热红外辐射特性有一定的差别，尤其是人工地表和自然地表之间热红外辐射特性在白天相差较大．
According to the thermal equilibrium equation of the earth’s surface under natural environment, a theoretical model for calculating the thermal infrared radiation characteristics of the earth’s surface is established. Using the principle of temperature and humidity coupling, sufficient consideration has been given to the variation of the thermal characteristics and radiation characteristics of the ground surface with the water content. The simulation results of solar radiation at different surface temperatures are given and compared and analyzed. The results show that there are some differences in the thermal infrared radiation characteristics of different ground surfaces under the same natural environment, especially on the surface of artificial and natural Thermal infrared radiation between the characteristics of a larger difference in the daytime.