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Phase Leading of Temperature Variations in Cavity Caused by Heat Conduction Between Air and Rock |
| WU Shu-Chao;CHEN Fan;FAN Shu-Hua;LUO Jun |
| Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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| Cite this article: |
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WU Shu-Chao, CHEN Fan, FAN Shu-Hua et al 2003 Chin. Phys. Lett. 20 2192-2194 |
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Abstract It is well known that the terrestrial temperature varies with the period of 24 hours mainly due to the rotation of the earth in the field of the solar radiation. However, we observed the phenomenon that the semidiurnal (12-hour) temperature oscillation is dominant in our underground laboratory. By the spectrum analysis, the close correlation between the variations of temperature and atmospheric pressure was discovered, and the result of phase analysis showed that the phase of semidiurnal pressure lags behind that of the semidiurnal temperature. A model of heat conduction between air and rock is presented to explain the semidiurnal temperature oscillation observed in the underground laboratory.
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| Keywords:
44.10.+i
91.10.Tq
92.70.Cp
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Published: 01 December 2003
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