Remote Radio-Physical Harbingers of Drought in Steppes of the South of Western Siberia
Methods for remote sensing of the underlying surface in the microwave range based on moisture dependence of soil emissivity were successfully used in monitoring droughts and assessing water availability of the studied territories. Soil moisture influence on soil cover emissivity calibrated in units...
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MDPI AG
2022-12-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/23/6141 |
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| author | Andrey Romanov Ivan Ryabinin Ilya Khvostov Dmitry Troshkin Dmitry Romanov |
| author_facet | Andrey Romanov Ivan Ryabinin Ilya Khvostov Dmitry Troshkin Dmitry Romanov |
| author_sort | Andrey Romanov |
| collection | DOAJ |
| description | Methods for remote sensing of the underlying surface in the microwave range based on moisture dependence of soil emissivity were successfully used in monitoring droughts and assessing water availability of the studied territories. Soil moisture influence on soil cover emissivity calibrated in units of the radio brightness temperature (T<sub>B</sub>) was studied. We used values of T<sub>B</sub> derived from SMOS satellite data. This paper presents the results of a comparative analysis of soil, meteorological conditions and physical characteristics of soils in the test territories of the Kulunda Plain. The experimental data were applied in computing trends of T<sub>B</sub> and physical temperature (T) described by linear dependencies. Volume fractions of water (W) in soil were calculated based on the satellite sensing data, the results of field studies and laboratory measurements of dielectric characteristics of soils. A map scheme of spatial distribution of W was constructed and the influences of snow cover, precipitation and surface wind velocity on drought were analyzed. The comprehensive analysis of remote, field and laboratory data suggest that the rate of change in the brightness temperature (dT<sub>BH</sub>/dD—up to 17 K per day), which characterizes the rate of fall in volume humidity of soil (ΔW—up to 0.009 cm<sup>3</sup>/cm<sup>3</sup> per day), can be used as a short-term radio-physical harbinger of drought. An experimental dependence of the rate of change in radio brightness temperature on the rate of change in soil moisture was established. |
| first_indexed | 2024-03-09T17:32:41Z |
| format | Article |
| id | doaj.art-40c3f79087fe4a98a6abf7433ac90fd3 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T17:32:41Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-40c3f79087fe4a98a6abf7433ac90fd32023-11-24T12:06:27ZengMDPI AGRemote Sensing2072-42922022-12-011423614110.3390/rs14236141Remote Radio-Physical Harbingers of Drought in Steppes of the South of Western SiberiaAndrey Romanov0Ivan Ryabinin1Ilya Khvostov2Dmitry Troshkin3Dmitry Romanov4Institute for Water and Environmental Problems SB RAS, 1 Molodezhnaya St., Barnaul 656038, RussiaInstitute for Water and Environmental Problems SB RAS, 1 Molodezhnaya St., Barnaul 656038, RussiaInstitute for Water and Environmental Problems SB RAS, 1 Molodezhnaya St., Barnaul 656038, RussiaInstitute for Water and Environmental Problems SB RAS, 1 Molodezhnaya St., Barnaul 656038, RussiaInstitute for Water and Environmental Problems SB RAS, 1 Molodezhnaya St., Barnaul 656038, RussiaMethods for remote sensing of the underlying surface in the microwave range based on moisture dependence of soil emissivity were successfully used in monitoring droughts and assessing water availability of the studied territories. Soil moisture influence on soil cover emissivity calibrated in units of the radio brightness temperature (T<sub>B</sub>) was studied. We used values of T<sub>B</sub> derived from SMOS satellite data. This paper presents the results of a comparative analysis of soil, meteorological conditions and physical characteristics of soils in the test territories of the Kulunda Plain. The experimental data were applied in computing trends of T<sub>B</sub> and physical temperature (T) described by linear dependencies. Volume fractions of water (W) in soil were calculated based on the satellite sensing data, the results of field studies and laboratory measurements of dielectric characteristics of soils. A map scheme of spatial distribution of W was constructed and the influences of snow cover, precipitation and surface wind velocity on drought were analyzed. The comprehensive analysis of remote, field and laboratory data suggest that the rate of change in the brightness temperature (dT<sub>BH</sub>/dD—up to 17 K per day), which characterizes the rate of fall in volume humidity of soil (ΔW—up to 0.009 cm<sup>3</sup>/cm<sup>3</sup> per day), can be used as a short-term radio-physical harbinger of drought. An experimental dependence of the rate of change in radio brightness temperature on the rate of change in soil moisture was established.https://www.mdpi.com/2072-4292/14/23/6141satellitemicrowave sensingdroughtWestern Siberia |
| spellingShingle | Andrey Romanov Ivan Ryabinin Ilya Khvostov Dmitry Troshkin Dmitry Romanov Remote Radio-Physical Harbingers of Drought in Steppes of the South of Western Siberia Remote Sensing satellite microwave sensing drought Western Siberia |
| title | Remote Radio-Physical Harbingers of Drought in Steppes of the South of Western Siberia |
| title_full | Remote Radio-Physical Harbingers of Drought in Steppes of the South of Western Siberia |
| title_fullStr | Remote Radio-Physical Harbingers of Drought in Steppes of the South of Western Siberia |
| title_full_unstemmed | Remote Radio-Physical Harbingers of Drought in Steppes of the South of Western Siberia |
| title_short | Remote Radio-Physical Harbingers of Drought in Steppes of the South of Western Siberia |
| title_sort | remote radio physical harbingers of drought in steppes of the south of western siberia |
| topic | satellite microwave sensing drought Western Siberia |
| url | https://www.mdpi.com/2072-4292/14/23/6141 |
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