Analysis of variation regularity of land-surface physical quantities over Dingxi Region of the Loess Plateau

作者：Zhang Qiang^*; Sun Zhao-Xuan; Wang Sheng

来源：Acta Geophysica Sinica, 2011, 54(7): 1727-1737.

DOI：10.3969/j.issn.0001-5733.2011.07.005

• Loess Plateau
• Dingxi Region
• Land-surface radiation components
• Land-surface energy balance
• Bowen ratio

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.

• 出版日期2011-7
• 单位中国气象局兰州干旱气象研究所