摘要
对比研究了6种用土壤温度计算表层土壤导温率的方法结果表明,振幅法、相位法、反正切法、对数法虽需较少观测值,计算简单,但结果却不太稳定;谐波法计算过程虽较复杂,但导温率的估算值较稳定,是最可靠的方法之一。利用计算的土壤导温率估算近地表土壤热通量,结果与由温度积分法决定的土壤热通量值非常一致。
Six methods of calculating the soil thermal conductivity and the soil heat flux in the soil near surface layer are studied with observation of soil temperature. The amplitude, phase, arctangent, and logarithm require only a few measurements of temperature and their calculations are simple. However, the results are erratic. Numerical and harmonic methods, which use much more temperature measurements, generally provide more reliable results. The estimation of soil heat flux, based on the calculated thermal conductivity, is consistent well with values of heat flux determined with the temperature integral method.
出处
《中国生态农业学报》
CAS
CSCD
2002年第1期62-64,共3页
Chinese Journal of Eco-Agriculture
基金
国家自然科学基金(49890330)
中国科学院地理科学与资源研究所创新项目(CXIOG-C00-05-01)
关键词
土壤温度
估算
表层土壤导温率
热通量
Soil thermal conductivity, Soil temperature, Soil heat flux