With the increase of soil depth, daily variation amplitude of soil temperature decreases.
随着土壤深度的增加，地温日变幅逐渐减小。
The difference between different underlying surfaces only helps increase or decrease the daily variation amplitude of the elements.
下垫面差异只起到加强或缓和气象要素日变化幅度的作用。
For different soil depths, the amplitude of temperature daily variation can be approximated as an exponential function of the depth.
一日内地温变幅与深度关系可拟合成指数函数。
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