Analysis of Variation Regularity of Land‐Surface Physical Quantities Over the Dingxi Region of the Loess Plateau
Analysis of Variation Regularity of Land‐Surface Physical Quantities Over the Dingxi Region of the Loess Plateau
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DOI：
10.1002/cjg2.1627
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发表时间：
2011-07
期刊：
影响因子：
--
通讯作者：
Qiang Zhang;Zhaobin Sun;Sheng Wang
中科院分区：
文献类型：
--
作者：
Qiang Zhang;Zhaobin Sun;Sheng Wang
利用黄土高原多种地表物理量的长期综合观测数据，在分析土壤温度和土壤湿度基本特征的基础上，系统分析了地表辐射分量、地表能量分量、地表反照率和鲍温比等主要地表物理量的变化特征，探讨了地表能量不平衡裕度的分布规律。 黄土高原地表物理量特征与其他地区差异较大，特别是日土壤温度向下传播、地表以下30 cm处的“湿层”、地表反照率“Ⅴ”型日变化结构不对称、感热通量双峰分布、能量平衡分量异相、地表能量不平衡幅度大等特征都是新的认识。 地表物理量。
By using the long-term integrated data of a variety of land-surface physical quantities observed over the Loess Plateau,based on analyzing the basic characteristics of soil temperature and soil moisture,the variation characteristics of main land-surface physical quantities of land-surface radiation components,land-surface energy components,surface albedo and Bowen ratio are systematically analyzed.The distribution of margin of land-surface energy unbalance is discussed.It is found that the characteristics of the land-surface physical quantities over the Loess Plateau are more different than in other regions.Especially the downward propagation of daily soil temperature,"wet layer" at 30 cm below the soil surface,asymmetrical "Ⅴ"-type daily variation structure of surface albedo, bimodal distribution of sensible heat flux, the different phase of energy balance components and large margin of land-surface energy unbalance are all the new understanding of characteristics of land-surface physical quantities.