Heat balance and soil moisture in the Loess Plateau, China
Heat balance and soil moisture in the Loess Plateau, China
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DOI：
10.2480/agrmet.60.103
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发表时间：
2004-06-01
影响因子：
1.3
通讯作者：
Zhang, Xingchang
中科院分区：
文献类型：
--
作者：
Kimura, Reiji;Kamichika, Makio;Zhang, Xingchang
采用三层土壤模型对黄土高原地区的热量平衡和土壤水分状况进行了研究，并将其应用于实际的裸田（鸟取沙丘和陕西神木）。每天观测到的蒸发量与计算得出的蒸发量之间的差异约为0.18 mm（5 W m-2）至0.21 mm（6 W m-2）。神木黄绵土是一种砂、粉土、粘粒混合的中等质地土壤，它对土壤的保水和限制蒸发有一定的影响。利用榆林市近神木区的气象资料，分析了热量平衡和土壤水分的季节变化。感热通量和潜热通量的年平均值分别为23 W m-2和19 W m-2（239 mm/a）。第二层和第三层土壤含水量在冬季保持较高水平。
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 (239 mm per year), respectively. The soil water content of the second and third layers remained comparatively high in winter.