Saharan dust electrification perceived by a triangle of atmospheric electricity stations in Southern Portugal

HG Silva, F Lopes, S Pereira, Kerianne Nicoll, S M Barbosa, R Conceicao, S Neves, S Neves, Giles Harrison, M Collares Pereira

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Abstract

Atmospheric Electric Potential Gradient (PG) measurements were carried out in three sites forming a triangular array in Southern Portugal. The campaign was performed during the summer, characterized by Saharan dust outbreaks; 16th-17th July 2014 dust event is considered. Short time-scale oscillations of the PG at two of the stations and a mid time-scale suppression of the PG in the three stations are found. Results are interpreted as evidencing long-range dust
electrification; attributed to the air-Earth electrical current creating a bipolar charge distribution inside of the dust layer. The relevance of using arrays of sensors, instead of single sited, is highlighted.
Original languageEnglish
Pages (from-to)106-120
JournalJournal of Electrostatics
Volume84
Early online date28 Oct 2016
DOIs
Publication statusPublished - Dec 2016

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    Silva, HG., Lopes, F., Pereira, S., Nicoll, K., Barbosa, S. M., Conceicao, R., Neves, S., Neves, S., Harrison, G., & Collares Pereira, M. (2016). Saharan dust electrification perceived by a triangle of atmospheric electricity stations in Southern Portugal. Journal of Electrostatics, 84, 106-120. https://doi.org/10.1016/j.elstat.2016.10.002