A temperature prediction-correction method for estimating surface soil heat flux from soil temperature and moisture data  

作　　者：Kun Yang JieMin Wang 

机构地区：[1] Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100085, China [2] Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 73000, China

出　　处：《Science China Earth Sciences》2008年第5期721-729,共9页中国科学（地球科学英文版）

基　　金：the Program of One Hundred Talented People of the Chinese Academy of Sciences

摘　　要：Surface soil heat flux is a component of surface energy budget and its estimation is needed in land-atmosphere interaction studies. This paper develops a new simple method to estimate soil heat flux from soil temperature and moisture observations. It giveSurface soil heat flux is a component of surface energy budget and its estimation is needed in land-atmosphere interaction studies. This paper develops a new simple method to estimate soil heat flux from soil temperature and moisture observations. It gives soil temperature profile with the thermal diffusion equation and, then, adjusts the temperature profile with differences between observed and computed soil temperatures. The soil flux is obtained through integrating the soil temperature profile. Compared with previous methods, the new method does not require accurate thermal conductivity. Case studies based on observations, synthetic data, and sensitivity analyses show that the new method is preferable and the results obtained with it are not sensitive to the availability of temperature data in the topsoil. In addition, we pointed out that the soil heat flux measured with a heat-plate can be quite erroneous in magnitude though its phase is accurate.

关 键 词：soil heat FLUX thermal CONDUCTIVITY TEMPERATURE correction heat-plate 

分 类 号：P456[天文地球—大气科学及气象学]