A simple electrodynamic model of a dust devil

We present an electrodynamic model of a dust devil applying a similar methodology as performed previously for charging in terrestrial thunderstorms. While thunderstorm processes focus on inductive charging between large graupel and smaller ice and water droplets, we tailor the model to focus on the...

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Bibliographic Details
Published in:	Geophysical research letters Vol. 30; no. 20; pp. 2050 - n/a
Main Authors:	Farrell, William M., Delory, Greg T., Cummer, Steven A., Marshall, John R.
Format:	Journal Article
Language:	English
Published:	American Geophysical Union 01-10-2003 Blackwell Publishing Ltd
Subjects:	Atmospheres—structure and dynamics Atmospheric electricity Meteorology Meteorology and Atmospheric Dynamics Planetary meteorology Planetology Solid Surface Planets
Online Access:	Get full text
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Summary:	We present an electrodynamic model of a dust devil applying a similar methodology as performed previously for charging in terrestrial thunderstorms. While thunderstorm processes focus on inductive charging between large graupel and smaller ice and water droplets, we tailor the model to focus on the electric charge transfer between dust grains of different sizes and compositions. We specifically compare and contrast the triboelectric dust charging processes presented previously in Melnik and Parrot [1998] and Desch and Cuzzi [2000] in the development of macroscopic dust devil electric fields. We find that large vertical E‐fields (∼20 kV/m) can develop in the devil.
Bibliography:	istex:E4283B66E89AA7DFB9B6ECF3F9ACAD842AA766E4 ArticleID:2003GL017606 ark:/67375/WNG-6ZDTPVJC-H ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	0094-8276 1944-8007
DOI:	10.1029/2003GL017606