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Telecommunications and Radio Engineering
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ISSN Print: 0040-2508
ISSN Online: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v74.i14.40
pages 1269-1283

RADAR INVESTIGATIONS OF THE AEOLIAN SAND AND DUST TRANSPORTING MANIFESTATIONS IN DESERT AREAS

V. K. Ivanov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
A. Ya. Matveyev
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
V. N. Tsymbal
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
S. Ye. Yatsevich
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura Str., Kharkiv 61085, Ukraine

ABSTRACT

The Aeolian processes transporting sand and dust is a powerful erosive force that shapes the structure of the surface of the vast territories and loads the atmosphere with aerosols of suspended dust spread by wind over long distances. The presence of atmospheric dust in the environment of the planet is one of the factors significantly affecting the temperature and climatic conditions of vast regions. There are no published data on the characteristics of the radio waves scattering features manifested in radar studies of the Aeolian sand and dust transport processes in desert regions, which can be used for determining the parameters of a remote transport. The article presents the results of the analysis of long-time surveys of desert areas by side-looking radars (SLR) of Cosmos-1500 and Sich-1 satellites, synthetic aperture radars (SAR) of ERS-1, ERS-2 and Envisat-1, aimed at identifying the radio waves scattering features manifested in radar studies of Aeolian sand and dust transportation processes in desert regions, which can be used for remote determining the parameters of transportation. It is suggested to explain the mechanism of the effect of a anomalous narrow-directed backward scattering of radio waves, which manifests itself in areas covered with deep sand at the direction of irradiating the surface towards the general direction of the surface wind in the range of local surface irradiation angles Θ ≈ 31÷34°, due to their interaction with consistently oriented ionized air layers bordering on sand ripples structures in the process of forming it with the Aeolian transportation of sand-dust mixture. Ionization is caused by strong inhomogeneous electric field arising in the Aeolian transport process. Results of the study allow creating the new remote monitoring methods of processes in desert areas that affect the climate of vast regions of the Earth.


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