| 毛乌素沙地南缘凝结水观测实验分析 |
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| 引用本文： | 张晓影,李小雁,王卫,马育军.毛乌素沙地南缘凝结水观测实验分析[J].甘肃气象,2008,26(3):8-13. |
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| 作者姓名： | 张晓影 李小雁 王卫 马育军 |
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| 作者单位： | [1]北京师范大学 地表过程与资源生态国家重点实验室,北京100875 [2]北京师范大学资源学院土地资源研究所,北京100875 |
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| 基金项目： | 教育部全国优秀博士学位论文作者专项基金，国家自然科学基金，国家科技支撑项目 |
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| 摘 要： | 采用称重法对2007年8月期间毛乌素沙地南缘不同地表类型（改良沙地、生物结皮、物理结皮和流沙）、沙丘不同部位的凝结水形成动态过程进行了系统观测。结果表明：改良沙地凝结水量达0．206mm／d，显著大于生物结皮、物理结皮和流沙，生物结皮凝结水量为0．100mm／d，显著高于流沙，而其他两者之间凝结水量无显著性差异；沙丘不同部位凝结水量差异显著，丘间地凝结水量最大，沙丘坡面次之，沙丘顶部最少，日凝结水量分别为0．0873mm／d、0．0768mm／d和0．0674mm／d；从凝结水形成过程看出凝结水一般在每天17：00产生，次日7：00结束，在夜晚21：00和凌晨3：00左右出现2个凝结水较大值；凝结水的形成与气象因子密切相关，凝结水量与地表温度、大气和地表温度差以及净辐射具有显著相关性。
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| 关 键 词： | 凝结水观测 改良沙地 不同沙地表层 毛乌素沙地 |
Experimental Observation Analysis on Dew Formation in Southern Mu us Sandy Land |
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| ZHANG Xiaoying,LI Xiaoyan,WANG Wei,MA Yujun.Experimental Observation Analysis on Dew Formation in Southern Mu us Sandy Land[J].Gansu Meteorology,2008,26(3):8-13. |
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| Authors: | ZHANG Xiaoying LI Xiaoyan WANG Wei MA Yujun |
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| Institution: | 1.State Key Laboratory of Earth Surface Processes and Resource Ecology;Beijing Normal University;Beijing 100875;China;2.Institute of Land Resources;College of Resources Sciences and Technology;China |
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| Abstract: | Measurements of dew were carried out on four different soil surfaces(biological soil crust,physical soil crust,bare sand and improved sandy soil) and different locations within a dune in Mu us Sandy Land in August 2007.Moreover,the process of dew formation within a day was also observed.The results indicated that the characteristic of particle size was a determining factor for the dew amount for the different soil surfaces,the improved sandy soil had highest dew amount because it had a higher content of sil... |
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| Keywords: | dew observation improved soil different soil surfaces Mu us Sandy Land |
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