Estimation of surface soil water content from surface temperatures in dust source regions of Mongolia and China |
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| Authors: | Reiji Kimura and Masato Shinoda |
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| Institution: | (1) Arid Land Research Center, Tottori University, Hamasaka 1390, Tottori 680-0001, Japan |
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| Abstract: | 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. |
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