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Heat Balance and Soil Moisture in the Loess Plateau, China

机译：黄土高原地区的热平衡与土壤水分

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摘要

A three-layer soil model was used for clarifying the heat balance and soil water content in the Loess Plateau, China, and applied to actual bare soil fields (Tottori Sand Dune and Shenmu District, Shaanxi Province, China). The difference between the observed and calculated evaporation per day was approximately 0.18 mm (5 W m~(-2)) to 0 21 mm (6 W m~(-2)). Because of its moderate mixture of sand, silt and clay, yellow loessial soil in Shenmu affects water retentivity and restriction of evaporation from the soil surface. The seasonal change of heat balance and soil water content was examined using meteorological data in Yulin near Shenmu. The annual means of sensible heat and latent heat flux were 23 W m~(-2) and 19 W m~(-2) (239mm per year), respectively. The soil water content of the second and third layers remained comparatively high in winter.
机译：使用三层土壤模型来阐明中国黄土高原的热量平衡和土壤水分含量，并将其应用于实际的裸露土壤田地（中国陕西省鸟取县沙丘和神木区）。每天观察到的和计算出的蒸发量之间的差约为0.18 mm（5 W m〜（-2））至0 21 mm（6 W m〜（-2））。神木的黄土土壤由于其适度的沙子，淤泥和粘土混合，影响了水的保持力并限制了土壤表层的蒸发。利用神木附近榆林市的气象资料，研究了热平衡和土壤含水量的季节变化。感热和潜热通量的年平均值分别为23 W m〜（-2）和19 W m〜（-2）（每年239mm）。冬季第二层和第三层的土壤水分含量仍然较高。

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