Satellite remote sensing applications for surface soil moisture monitoring: A review |
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Authors: | Lingli Wang and John J Qu |
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Institution: | (1) EastFIRE Laboratory, Environmental Science and Technology Center (ESTC), College of Science, George Mason University, Fairfax, VA 22030, USA |
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Abstract: | Surface soil moisture is one of the crucial variables in hydrological processes, which influences the exchange of water and
energy fluxes at the land surface/atmosphere interface. Accurate estimate of the spatial and temporal variations of soil moisture
is critical for numerous environmental studies. Recent technological advances in satellite remote sensing have shown that
soil moisture can be measured by a variety of remote sensing techniques, each with its own strengths and weaknesses. This
paper presents a comprehensive review of the progress in remote sensing of soil moisture, with focus on technique approaches
for soil moisture estimation from optical, thermal, passive microwave, and active microwave measurements. The physical principles
and the status of current retrieval methods are summarized. Limitations existing in current soil moisture estimation algorithms
and key issues that have to be addressed in the near future are also discussed. |
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Keywords: | surface soil moisture monitoring satellite remote sensing |
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