【摘要】 根据能量守恒定律,证明了土壤恒温层温度等于年均气温,并且用4座城市的土壤恒温层温度与当地年均气温进行对比,验证了此结论。利用土壤自然温度场模型,推导出土壤恒温层深度的计算公式。定量分析了影响土壤恒温层深度的5种因素,得出了土壤恒温层深度主要受大气温度年振幅(Tamax-Tam)、恒温层温度振幅(ε)及土壤导温系数(a)3种因素影响的结论。更多还原

【Abstract】 The soil layer of constant temperature equals to the annual average atmosphere temperature,by contrasting soil constant layer temperature with the annual average ambient temperature date of four different cities.Through the model of natural soil temperature field,the depth formula of the constant temperature layer was deduced,and five main factors that influence the soil depth with constant temperature were analyzed.A conclusion was drawn that the soil depth with constant temperature depends of three main factors,the amplitude of ambient temperature(Tamax-Tam),the temperature amplitude of the constant temperature layer ε and the soil thermal diffusivity a.更多还原