| 热对流对土壤温度和能量平衡的影响 |
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| 引用本文： | 孔丽静,刘树华,吕世华,张宇.热对流对土壤温度和能量平衡的影响[J].北京大学学报(自然科学版),2011,47(3):475-482. |
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| 作者姓名： | 孔丽静 刘树华 吕世华 张宇 |
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| 作者单位： | 1. 北京大学物理学院大气与海洋科学系,北京,100871
2. 中国科学院寒庆旱区环境与工程研究所,兰州,73000 |
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| 基金项目： | 国家重点基础研究发展计划(2009CB421402)资助 |
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| 摘 要： | 在传统的土壤热传导方程基础上,耦合了土壤水分的垂直运动引起的热对流项,用金塔绿洲2005年6月11-15日的观测数据分别计算了土壤热扩散系数以及水的通量密度.以0.05 m深度的土壤层为上边界,模拟了0.10 m和0.20 m深度的土壤层温度,并比较了计算的地表能量闭合因子.结果表明:热传导对流方法模拟的土壤温度与实际...
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| 关 键 词： | 热传导 热对流 土壤热扩散率 水通量密度 能量闭合因子 |
Effect of Thermal Convection on Soil Temperature and Energy Balance |
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| KONG Lijing,LIU Shuhua,Lv Shihua,ZHANG Yu.Effect of Thermal Convection on Soil Temperature and Energy Balance[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2011,47(3):475-482. |
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| Authors: | KONG Lijing LIU Shuhua Lv Shihua ZHANG Yu |
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| Institution: | KONG Lijing1,LIU Shuhua1,Lü Shihua2,ZHANG Yu2 1.Department of Atmospheric and Oceanic Sciences,School of Physics,Peking University,Beijing 100871,2.Cold and Arid Regions Environmental Engineering Research Institute,Chinese Academy of Science,Lanzhou 73000 |
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| Abstract: | The authors coupled the heat convection caused by water vertical movement to the traditional soil heat conduction equation.Utilizing the data collected at Jinta Oasis from June 11 to 15,2005,the thermal diffusivity and the liquid water flux density were calculated respectively.Based on the results of soil thermal diffusivity,taking the soil layer at the depth of 0.05 m as the upper boundary,the authors modeled the temperature for the soil layer at the depth of 0.10 m and 0.20 m by means of the two methods m... |
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| Keywords: | thermal conduction thermal convection soil thermal diffusivity water flux density energy closure factor |
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