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| 土壤水分的垂直运动对黄土高原糜田土壤温度的影响 | |
| 引用本文： | 王琳琳,高志球,沈新勇,陈渭民.土壤水分的垂直运动对黄土高原糜田土壤温度的影响[J].南京气象学院学报,2008,31(3):363-368. |
| 作者姓名： | 王琳琳 高志球 沈新勇 陈渭民 |
| 作者单位： | 1. 南京信息工程大学,江苏省气象灾害重点实验室,江苏,南京,210044;中国科学院大气物理研究所,大气边界层和大气化学国家重点实验室,北京,100029 2. 中国科学院大气物理研究所,大气边界层和大气化学国家重点实验室,北京,100029 3. 南京信息工程大学,江苏省气象灾害重点实验室,江苏,南京,210044 |
| 基金项目： | 中国科学院"百人计划"，国家自然科学基金，国家重点基础研究发展计划(973计划)，江苏省气象灾害重点实验室基金 |
| 摘 要： | 利用2005年8月21—23日黄土高原塬区地表过程野外试验加密观测土壤温度数据,通过耦合热传导对流方法计算得到糜田0.05～0.1 m浅薄土壤层的热扩散率为2.950×10^-7～3.015×10^-7m^2.s^-1,液态水通量密度为1.738×10^-6～2.197×10^-6m^3.s^-1.m^-2。在此基础之上,利用耦合热传导对流方程和传统热传导方法对土壤温度进行模拟,结果表明：由于传统热传导方法没有考虑土壤水分的垂直运动,模拟振幅偏大0.4 K、位相后移0.140 7 rad,与观测值的协方差分别为2.99、2.14;耦合热传导对流方法模拟振幅与观测值的协方差为2.13,模拟结果较理想。 |
| 关 键 词： | 热传导 热对流 热扩散率 液态水通量密度 |
Impact of Soil Water Vertical Movement on the Soil Temperature in a Broomcorn Millet Field over the Loess Plateau |
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| WANG Lin-lin,GAO Zhi-qiu,SHEN Xin-yong,CHEN Wei-min.Impact of Soil Water Vertical Movement on the Soil Temperature in a Broomcorn Millet Field over the Loess Plateau[J].Journal of Nanjing Institute of Meteorology,2008,31(3):363-368. | |
| Authors: | WANG Lin-lin GAO Zhi-qiu SHEN Xin-yong CHEN Wei-min |
| Institution: | WANG Lin-lin, GAO Zhi-qiu, SHEN Xin-yong ,CHEN Wei-min ( 1. Jiangsu Key Laboratory of Meteorological Disaster,NUIST,Nanjing 210044,China; 2. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmosphere Physics,Chinese Academy of Sciences,Beijing 100029,China) |
| Abstract: | Based on the soil temperature data collected at the soil site covered with broomcom millet over the Loess plateau during the period from August 21 to 23,2005, we calculate the thermal diffusivity （2. 950 × 10^-7 ～ 3. 015 × 10^-7 m^2 · s^-1 ） and the liquid water flux density （ 1. 738 × 10^-6 ～ 2. 197 × 10^-6m^3 · s^-1· m^-2） via the method of coupled thermal conduction and convection transfer at the depths 0.05 m to 0. 1 m in this area. The soil temperatures are therefore modeled by using the method of coupled thermal conduction and convection transfer, as well as the traditional method of thermal conduction alone. The result shows the latter overestimates both the amplitude （ 0. 42 K） and phase shift （0. 140 7 rad） of soil temperature,and the covariances of two schemes are 2.99 and 2. 14,respectively,because it does not consider the soil water vertical movement, while the covariance of the former is 2. 13, which makes a reasonable estimate of soil temperature. |
| Keywords: | thermal conduction thermal convection thermal diffusivity liquid water flux density |
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