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Point discharge current measurements beneath dust devils

Lorenz, R. D., Neakrase, L. D. V., Anderson, J. P., Harrison, R. G. 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:Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:67963
Publisher:Elsevier

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