Radar techniques for identification of desert regions – the sources of dust in the atmosphere

Ivanov, V. K.; Matveev, A. Ya.; Tsymbal, V. N.; Yatsevich, S. Ye.; Bychkov, D. M.

doi:10.15407/rej2015.04.011

Cited by 1 publication

(2 citation statements)

References 7 publications

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“…The experimentally proven the fact that the knocked out reptons escape in different directions in a semicircle [9] explains the rather weak dependency of the intensity of anomalously narrow beam backscat d tering on the wind direction relative to the direction (in the azimuthal plane) of radar illumination of the surface. In the case of downwind illumination, the ef fect has not been observed [8].…”

Section: Specific Features Of Motion Of the Negatively Charged Sand G...mentioning

confidence: 92%

“…In order to verify the proposed explanation of the mechanism of occurrence of the anomalously narrow beam scattering of radio waves suggested in paper [8], it was estimated the efficiency of radio wave scattering by a sandy surface disturbed sand ripples. To that end, in [9] was determined the maximum possible (in the case of the oblique backscatter remote sensing) back scatter factor of such a structure in the steady state (when there is no wind produced motion of the sand ripples) for the situation where the radio wave is nor mally incident upon the surface of the plane lee slope. This was taken into account that the effective depth of penetration of a radio wave with λ = 5.6 cm into dry sand makes dozens of centimeters, i.e.…”

Section: Analysis Of Specific Features Of the Effects Of The Anomalou...mentioning

confidence: 99%

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Spaceborne radar identification of desert regions as suppliers of dust into the atmosphere

Ivanov

Matveyev

Tsymbal

et al. 2017

UJRS

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Atmosphere dust represents a mixture of minute particles of various salts and minerals. Also it contains remains of animal and vegetable organisms, spores of causative organisms and so forth. The dust is carried by winds over considerable distances and its presence in the atmosphere is among the factors which have essential influence on the global climate of the Earth. At present the Aeolian processes and their consequences are monitored from space using multispectral optical systems (TOMS, METEOSAT, MODIS etc.) only. These are not capable of reliable identification of the areas themselves that are sources of raising the dust in the atmosphere independently of the cloudiness, solar illumination and transparency of the atmosphere. This problem can be solved with the use of space radar systems of the Earth remote sensing. The paper presents the first results of the development of a radar technique of identification of desert regions in which dust from the surface is transported up into the atmosphere under the action of Aeolian processes. The work was performed using data of Earth remote sensing SAR Envisat-1 obtained over deserts of Mauritania. Specific features of display of the narrow-beam backscattering of radio waves in radar images in dependence on the surface wind speed and direction and direction of radar illumination of the surface. It is concluded that the radar means of remote sensing represent an efficient tool for detecting regions of dust raise into the atmosphere. Results of the study can be used for the development of new methods of remote monitoring of the processes in desert areas that affect the climate of vast regions of the Earth.

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Section: Specific Features Of Motion Of the Negatively Charged Sand G...mentioning

confidence: 92%

Section: Analysis Of Specific Features Of the Effects Of The Anomalou...mentioning

confidence: 99%

Spaceborne radar identification of desert regions as suppliers of dust into the atmosphere

Ivanov

Matveyev

Tsymbal

et al. 2017

UJRS

View full text Add to dashboard Cite

show abstract

Radar techniques for identification of desert regions – the sources of dust in the atmosphere

Cited by 1 publication

References 7 publications

Spaceborne radar identification of desert regions as suppliers of dust into the atmosphere

Spaceborne radar identification of desert regions as suppliers of dust into the atmosphere

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