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| STUDY ON ANALYTICAL RESOLUTION TO SOIL THERMAL CONDUCTIVE EQUATION AND SOIL THERMAL DIFFUSIVITY OVER NAGQU AREA |
| Received:October 28, 2000 Revised:March 26, 2001 |
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| KeyWord:Thermal conductive equation;Analytical resolution;Soil temperature profile;Soil thermal diffusivity |
| Author Name | Affiliation | | Gao Zhiqiu | Research Center of Environment and Global Change, Chinese Academy of Meteorological Sciences, Beijing 100081 | | Bian Lingen | Research Center of Environment and Global Change, Chinese Academy of Meteorological Sciences, Beijing 100081 | | Zhang Yabin | Research Center of Environment and Global Change, Chinese Academy of Meteorological Sciences, Beijing 100081 | | Wang Jinxing | Research Center of Environment and Global Change, Chinese Academy of Meteorological Sciences, Beijing 100081 | | Jiang Dongmei | Zibo Meteorological Bureau of Shandong Province, Zibo 255048 |
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| Abstract: |
| The soil thermal conductive equation and that with thermal convection term contained were solved analytically. Based on the observation data from soil moisture and temperature measurement system(SMTMS) sites during GAME/Tibet over Tibetan Plateau in September 4-10, 1998, we calculate the apparent soil thermal diffusivity by harmonic method (HM) and Laplace transform method (LTM), and the soil thermal diffusivity by the analytical resolution to soil thermal conductive equation with thermal convection term contained. This study demonstrates that the apparent soil thermal diffusivity in this area over the Tibetan Plateau is between 0.30×10-6 and 0.98×10-6m2/s in the upper layer(at depths 0.04 m to 0.20 m) where the soil thermal diffusivity should be between 0.15×10-6 and 0.72×10-6m2/s. Harmonic method(HM) leads to somewhat greater values of the apparent soil thermal diffusivity than the LTM method, furthermore, apparent soil thermal diffusivity is greater than soil thermal diffusivity. |
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