| 典型干旱区荒漠戈壁陆面参数的观测研究 |
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| 作者姓名： | Zhang Qiang Cao Xiaoyan Wei Guoan Huang Ronghui |
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| 作者单位： | Zhang Qiang，Cao Xiaoyan and Wei Guoan Cold and Arid Regions Environment and Engineering Institute，Chinese Academy of Sciences，Lanzhou 730000 Huang Ronghui Institute of Atmospheric-Physics，Chinese Academy of Sciences，Beijing 100029 |
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| 基金项目： | This research was sponsored by the National Key Program for Developing Basic Sciences Research on the Formation Mechanism and Pr |
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| 摘 要： | 根据目前流行的陆面过程模式的需要，利用２０００年５－６月敦煌陆面过程野外观测实验加强期的观测资料，分析了西北典型干旱区荒漠戈壁的一些关键陆面过程和土壤参数的特征和规律。并且利用相对反射为权重加权平均，计算得到典型干旱区敦煌荒漠戈壁的平均反射率为０.２５５±０.０２１；剔除建筑物干扰后，利用对数平均法计算的粗糙度长度平均值为０，００１９±０。０００７１ ｍ；剔除绿洲影响后，用无降水影响的资料确定出土壤湿度影响因子为０．００４５；剔除降水影响后，用观测资料计算的敦煌典型干旱区荒漠戈壁的热容量平均值为１．１２×１０~６ｍ~（－３）Ｋ~（－１），比“黑河试验”在戈壁和在其它沙漠观测的有关值略小一些，但热扩散率和热传导率都比“黑河试验”在戈壁观测的值小一倍左右；观测的敦煌戈壁典型天气条件下的土壤含水量非常小，基本上不超过１％。
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| 关 键 词： | 戈壁 陆面参数 水汽输送约束因子 粗糙度长度 土壤热扩散率 干旱区 陆面过程模式 |
| 收稿时间： | 27 November 2000 |
Observation and study of land surface parameters over Gobi in typical arid region |
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| Zhang Qiang,Cao Xiaoyan,Wei Guoan,Huang Ronghui.Observation and study of land surface parameters over Gobi in typical arid region[J].Advances in Atmospheric Sciences,2002,19(1):121-135. |
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| Authors: | Zhang Qiang Cao Xiaoyan Wei Guoan Huang Ronghui |
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| Institution: | Cold and Arid Regions Enironment and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000,Cold and Arid Regions Enironment and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000,Cold and Arid Regions Enironment and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000,Institute of Atmospheric Physics, Chinese Academy of Sciences Beijing 100029 |
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| Abstract: | According to the need of popular land surface process models, characteristics and rules of some key land surface process and soil parameters over Gobi in typical arid region of Northwest China are analyzed by using the data observed during the intensive observation period of the Dunhuang Land-Surface Process Field Experiment (DLSPFE) (May-June 2000). Using the relative reflection as weighting factor, the weighted mean of the surface albedo over Dunhuang Gobi in typical arid region is calculated and its values are 0.255 -+ 0.021. After canceling the interference of the buildings, the mean values of the roughness length averaged with logarithm is 0.0019-+ 0.00071 m. After removing the influence of the oasis, the soil wetness factor computed with data under condition of no precipitation is 0.0045. After removing the influence of the precipitation, the mean values of the soil heat capacity over Dunhuang Gobi in typical arid region is 1.12 ×l06 J m -3K-1, a bit smaller than the values observed in HEIFE. But the soil heat diffusivity and conductivity are about one of those observed in HEIFE. The soil water content over Dunhuang Gobi in typical synoptic condition is very little and does not exceed 1% basically. |
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| Keywords: | Gobi Land surface parameters Restraining factor to evaoration Surface albedo Roughness length Soil heat diffusivity |
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