Estimation of surface soil water content from surface temperatures in dust source regions of Mongolia and China
Estimation of surface soil water content from surface temperatures in dust source regions of Mongolia and China
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DOI：
10.1007/s12665-011-1167-9
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发表时间：
2012-03
影响因子：
2.8
通讯作者：
R. Kimura;M. Shinoda
中科院分区：
文献类型：
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作者：
R. Kimura;M. Shinoda
地表条件，如地表粗糙度和土壤湿度，控制着东北亚的风蚀和粉尘排放。用于预测沙尘事件的沙尘建模系统需要地表土壤含水量的空间和时间变化数据，目的是防止沙尘造成的损害。在蒙古国巴彦温珠尔和中国神木，对一个修正的温度-植被干燥指数（MTHRR）进行了测试，以了解它是否能重现沙尘季节测量的表层土壤含水量。根据气象数据估计的地面温度和空气动力学最低和最高表面温度计算了MTT。在巴彦温珠尔，当土壤含水量低于4%时，用MTD 1估算土壤含水量的误差标准差为±1.5%。这与所使用的土壤湿度传感器的±1%的观测误差相比是有利的。
Surface conditions, such as surface roughness and soil moisture, control wind erosion and dust emission in northeast Asia. Data on spatial and temporal changes of surface soil water content are needed for dust-modeling systems used to predict dust events with the aim of preventing damage from them. A modified temperature-vegetation dryness index (MTVDI) was tested to see if it could reproduce surface soil water contents measured during the dust event season in Bayan Unjuul, Mongolia, and Shenmu, China. MTVDI was calculated from land surface temperature and aerodynamic minimum and maximum surface temperatures estimated from meteorological data. The standard deviation of the error of estimations of soil water content from MTVDI was ±1.5% in Bayan Unjuul when soil water content was lower than 4%. This compares favorably with the observational error of ±1% of the soil moisture sensors used.