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On the Validation of Satellite Microwave Remote Sensing Data under Soil Salinity Conditions

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Abstract

The results of a comparative analysis of the underlying surface brightness temperature obtained from the SMOS satellite and calculated with the use of ground-based measurements of moisture and the laboratory measurements of dielectric characteristics of samples of saline soils and saline water from test sites of the Kulunda Steppe are presented. The values of the underlying surface brightness temperatures calculated with the use of ground investigations and the laboratory studies correlate satisfactorily with the values of brightness temperatures measured from the SMOS satellite. The deviations can be caused by the seasonal drying of highly mineralized shallow lakes, which results in a significant change in the areas occupied by lakes and the appearance (instead of a water surface) of wetlands with a high content of mineral salts, whose radio emission characteristics differ from the characteristics of the water surface and the soil cover.

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ACKNOWLEDGMENTS

We are grateful to our international colleagues Susanne Mecklenburg, Luca Festa (ESTRIN/ESA), and Arnaud Mialon (SECBIO) for helpful advice on processing the SMOS data.

Funding

The experimental studies were supported by the Russian Foundation for Basic Research _p_Sibir’, grant no. 13-05-98041 “Study of Seasonal Variations of Microwave Emission of Saline and Bitter Lakes in Southern West Siberia,” and Integration Interdisciplinary Project of Siberian Branch, RAS no. 69 “Integrated Studies of Climatic, Hydrological, and Ecosystem Processes on the Territory of West Siberian Swamps.” The SMOS images were provided under the ESA project no. 4747 “Remote Mapping of Siberian Saline Soils.”

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  1. Institute for Water and Environmental Problems, Siberian Branch, Russian Academy of Sciences, Barnaul, Russia

    A. N. Romanov & I. V. Khvostov

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  1. A. N. Romanov
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  2. I. V. Khvostov
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Correspondence to A. N. Romanov.

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Translated by L. Mukhortova

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Romanov, A.N., Khvostov, I.V. On the Validation of Satellite Microwave Remote Sensing Data under Soil Salinity Conditions. Izv. Atmos. Ocean. Phys. 55, 1033–1040 (2019). https://doi.org/10.1134/S0001433819090445

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