Space-borne radar observation of near-surface wind effect on anomalously highly-directional backscattering of radio waves from Aeolian processes of sand and dust transporting in desert regions

Keywords: radar observation, anomalously highly-directional backscattering of radio waves, Aeolian transport of sand and dust, near-surface wind

Abstract

Aeolian process of sand and dust transporting is known to form the near-ground surface structures over vast territories and fill the atmosphere up with suspended aerosols-like dust particles which are spread then by winds over long distances. The presence of atmospheric dust in the planet's environment is one of the factors affecting the temperature and climatic conditions of vast regions of the Earth. A number of publications (Ivanov et al., 2015; Ivanov et al., 2016; Ivanov et al., 2016; Ivanov et al., 2018) analyze the revealed effect of anomalously highly(narrow) directed backscattering of radio waves which manifests itself in radar remote sensing (in range of local irradiation angles θ ≈ 31°÷32°) in areas covered with deep sand. At the same time, there is no specific data available from published studies investigating the impact of the near-surface wind on anomalously highly-directional backscattering of radio waves based on the results of radar remote sensing researches of Aeolian sand and dust transport processes in desert regions that, in turn, could have been used later to determine the parameters of such transport process. This article presents the results of analysis of the data obtained from long-term studies of desert regions of El-Djuf, Akshar and Trarza in Mauritania by means of space-borne SAR Envisat-1. The purpose of the analysis was actually to identify the specifics of the effect that the near-surface wind has on the anomalously highly-directional backscattering of radio waves which is identified by radar based researches of Aeolian processes of sand and dust transport in desert regions, so can be used for remote determination of such transportation parameters.

References

Archive data of the meteorological website. (2003). Retrieved from http://www.wetter3.de/Archiv/index.html.

Greeley, R., Blumberg, D. G., Williams, S. H. (1996) Field measurements of the flux and speed of wind-blown sand. Sedimentology, 43(1), 41–52. https://doi.org/10.1111/j.1365-3091.1996.tb01458.x

Haddad, S., Salman, M. J. H., Jha, R. K. (1983). Effects of Dust Sandstorms on Some Aspects of Microwave Propagation. Proc. URSI Commission F Symposium, Louvain-la-Neuve: ESA publication. 194, 153–161.

Ivanov, V. K., Matveyev, A. Ya., Tsymbal, V. N., Yatsevich, S. Ye. and Bychkov, D. M. (2015). Radar investigations of the aeolian sand and dust transporting manifestations in desert areas. Telecommunications and RadioEngineering. 74 (14), 1269–1283. https://doi.org/10.1615/telecomradeng.v74.i14.40

Ivanov, V. K., Matveyev, A. Ya., Tsymbal, V. N., Yatsevich, S. Ye. and Bychkov, D. M. (2016). Radar identification of desert regions as suppliers of dust in the atmosphere. Telecommunications and RadioEngineering. 75 (10), 937–948. https://doi.org/10.1615/telecomradeng.v75.i10.70

Ivanov, V. K., Matveyev, A. Ya., Tsymbal, V. N., Yatsevich, S. Ye. and Bychkov, D. M. (2016). Spaceborne radar identification of desert regions as suppliers of dust into the atmosphere. Ukrajinsjkyj zhurnal dystancijnogho zonduvannja Zemli. 11, 39–47. Retrieved from https://ujrs.org.ua/ujrs/article/view/87/pdf.

Ivanov, V. K. (Eds.) (2018). Radar monitoring of natural and anthropogenic hazardous phenomena. (Part 2). Lambert Academic Publishing, Germany. Retrieved from https: //www.lappublishing.com.

Kok, J. F., Renno, N. O. (2008). Electrostatics in Wind-Blown Sand. Physical Review Letters, 100, 014501. https://doi.org/10.1103/physrevlett.100.014501

Kok, J. F. (2009). Understanding wind-blown sand and the electrification of granular systems by Jasper F. (2009). A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy (Appl. Physics) in The University of Michigan. Retrieved from https://deepblue.lib.umich.edu/bitstream/handle/2027.42/63669/jfkok_1.pdf?sequence=1&isallowed=y

Lancaster, N. (2009) Aeolian features and processes. The Geological Society of America, 1–25. Retrieved from https://www.nature.nps.gov/geology/monitoring/files/geomon-01.pdf.

Mohd Taufik Jusoh Tajudin. (2014). Study and design of reconfigurable antennas using plasma medium. Universite Rennes 1, access mode: https://tel.archives-ouvertes.fr/tel-01060295.

Namikas, S. L. (2003). Field measurement and numerical modeling of Aeolian mass flux distributions on a sandy beach. Sedimentology. 50, 303–326. https://doi.org/10.1046/j.1365-3091.2003.00556.x

Stow, C. D. (1969). Dust and sand storm electrification. Weather. 24(4), 134–137. https://doi.org/10.1002/j.1477-8696.1969.tb03165.x

Zheng, X. J. (2013). Electrification of wind-blown sand: Recent advances and key issues. The European physical journal E. 36, 138

Zhou, Y.H. Shu, Qin He, Jing, Xiao (2005). Zheng Attenuation of electromagnetic wave propagation in sandstorms incorporating charged sand particles. The European Physical Journal E. 17(2), 181–187. https://doi.org/10.1140/epje/i2004-10138-5

Section
Techniques for Earth observation data acquisition, processing and interpretation