论文部分内容阅读
分析大气边界层观测站地表能量平衡需要估计其地表土壤热通量.发展了一种由多层土壤温度和湿度观测资料估算土壤热通量的新方法.该方法首先求解一维热扩散方程得到土壤温度的基本廓线,然后校正所求温度廓线与观测值的偏差,最后积分温度廓线得到土壤各层的热通量.与众多的方法不同,该方法不需要事先给定不易准确测量和推求的热传导(或热扩散)系数值.通过与实测资料对比、模型合成数据试验、以及敏感性分析等,表明该方法的计算结果稳定可靠,对土壤表层数厘米深度内有无观测资料也不敏感.此外,指出热流板可准确测量热通量的方向和相位,但所测通量值的误差常较大.
It is necessary to estimate the surface soil heat flux for the analysis of the surface energy balance of the observatory of the atmospheric boundary layer. A new method for estimating soil heat flux from multi-layer soil temperature and humidity observation data is developed. This method first solves the one-dimensional thermal diffusivity equation The basic profile of soil temperature and then the deviation of the temperature profile from the observed value can be corrected and the temperature profile of the integrated temperature profile can be used to obtain the heat fluxes of all layers of the soil.Different from many methods, this method does not need to be given in advance and can not be accurately measured And deduced the coefficient of thermal conductivity (or thermal diffusion) .Compared with the measured data, the data of the model synthesis test and the sensitivity analysis, the results show that the method is stable and reliable. Whether there is any observation data within the depth of several centimeters In addition, it is pointed out that the heat flow plate can accurately measure the direction and phase of the heat flux, but the error of the measured flux value is often large.