The Effect of Surface Soil Moisture on Heat Balance at a Bare Soil Surface
The Effect of Surface Soil Moisture on Heat Balance at a Bare Soil Surface
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表层土壤湿度对裸土表面热平衡的影响
DOI：
10.3178/jjshwr.7.5_393
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
T. Hirota
中科院分区：
文献类型：
--
作者：
M. Fukumoto;T. Hirota
在裸地上同时测量地表土壤水分含量、地表热通量和气象资料，探讨地表土壤水分对裸地地表热平衡的影响。由于直接利用实测数据评价效果较困难，本文构建了一个简单的裸土表面热平衡模型，其中包括由上午9点实测数据确定的参数（反照率、大气发射率、G / Rn比、空气动力阻力和土壤阻力）的经验表达式。通过该模型的计算，明确了给定气象条件下，表层2cm内土壤体积含水量与地表热平衡之间的关系。
Surface soil moisture content, surface heat fluxes and meteorological data were measured simultaneously on a bare field to investigate the effect of surface soil moisture on the heat balance at a bare soil surface. A simple heat balance model for a bare soil surface was constructed, including empirical expressions of parameters (albedo, atmospheric emissivity, ratio G to Rn, aerodynamic resistance and soil resistance) which were determined from the measured data at 9 a.m., as it is difficult to evaluate the effect directly from the measured data. By calculation using this model, the relationship between the volumetric soil moisture content within the top 2cm layer and the surface heat balance under a given meteorological condition was clarified.