On the applicability of Kirchoffs law and the principle of heat balance in thermal infrared remote sensing:A non-isother

This paper proposes a basic equation of thermal radiation interaction between surface objects on the basis of the principle of heat balance in the interface. The solution of this equation takes account of the contribution of sensible heat flux and latent heat flux more completely, compared with traditional solution for surface cooling and heating processes. By the aid of the experimental data conducted in the Xiaotangshan experimental site, Beijing, both the non-applicability of Kirchoff's law and the measurability of surface emissivity in a non-isothermal system have been highlighted. Two methods called ventilation and time-delay compensations have been proposed to reduce the error induced by change of surface temperatures of non-isothermal objects during the measurement of emissivity. Based on the solution of the basic equation, this paper has analyzed and pointed out the misunderstanding in comprehension and application of Kirchoff's law published in literature.

作 者： ZHANG Renhua Li Zhaoliang SUN Xiaomin ZHU Zhilin WANG Weimin   作者單位： ZHANG Renhua,SUN Xiaomin,ZHU Zhilin,WANG Weimin(Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China)

Li Zhaoliang(Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101,China;LSIIT CNRS UMR7005, Bld Sebastien Brant, BP.10413, 67412 Illkirch, France) 

刊 名： 中國(guó)科學(xué)D輯（英文版）  SCI 英文刊名： SCIENCE IN CHINA (EARTH SCIENCES)  年，卷(期)： 2005 48(1)  分類號(hào)： P3  關(guān)鍵詞： applicability of Kirchoff's law   heat balance   non-isothermal system  

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