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冰川冻土 ›› 1983, Vol. 5 ›› Issue (4): 77-88.

• 研究论文 • 上一篇    下一篇

热流板测量精度分析

周允华, 项月琴   

  1. 中国科学院地理研究所农业生态系统试验站
  • 收稿日期:1982-11-02 出版日期:1984-08-25 发布日期:2012-04-26

Measuring Accuracy Analysis of the Heat Flux Plates

Zhou Yunhua, Xiang Yueqin   

  1. Beijing Institute of Geography, Academia Sinica
  • Received:1982-11-02 Online:1984-08-25 Published:2012-04-26

摘要: 地表土壤热通量是地表热量平衡中的一个重要分量,它的确定对于蒸发和湍流热通量的计算,高原冷热源及冰雪消融过程的研究等都有一定的意义。 地表热通量值可通过计算求得,但近年来,许多人利用热流板来直接测量。为了检验热流板测量值的可靠性,我们于1979年夏季在青海格尔木地区进行了试验性观测,现将主要结果分析讨论如下。

Abstract: In this paper, the edge effect of the heat flux plate was examined and the measuring accuracy of the Japanese heat flux plate, TYPE CN-81, and Australian ones was analysed with method developed from the Philip’s theory.The output values from heat flux plates buried in various depths and in different types of soil in Geermu region were measured in the period of the Meteorological Experiment on the Qinghai-Xizang plateau during May-August, 1979, and a harmonic wave analysis of these results was made. Reasonability of time structure and space structure of the heat flux waves was examined according to heat diffusion equation. It showed that if the instrument constant of heat flux plates was assumed as a fixed value, the variation of the phases and the amplitudes of the heat flux waves measured by heat flux plates with depth is reasonable, but the absolute amplitude values contain error, for example, the measured mean values of the heat flux is about 14% lower in the meadow-saline soil, and about 1/3 lower in the gobi in Geermu region.