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Point discharge current measurements beneath dust devils

Lorenz, R. D., Neakrase, L. D. V., Anderson, J. P., Harrison, R. G. ORCID: https://orcid.org/0000-0003-0693-347X and Nicoll, K. A. (2016) Point discharge current measurements beneath dust devils. Journal of Atmospheric and Solar-Terrestrial Physics, 150-151. pp. 55-60. ISSN 1364-6826

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To link to this item DOI: 10.1016/j.jastp.2016.10.017

Abstract/Summary

We document for the first time observations of point discharge currents under dust devils using a novel compact sensor deployed in summer 2016 at the USDA-ARS Jornada Experimental Range in New Mexico, USA. A consistent signature is noted in about a dozen events seen over 40 days, with a positive current ramping up towards closest approach, switching to a decaying negative current as the devil recedes. The currents, induced on a small wire about 10 cm above the ground, correlate with dust devil intensity (pressure drop) and dust loading, and reached several hundred picoAmps.

Item Type:Article
Refereed:Yes
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:67963
Publisher:Elsevier

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