The Open UniversitySkip to content
 

In situ measurements of particle load and transport in dust devils

Metzger, S. M.; Balme, M. R.; Towner, M. C.; Bos, B. J.; Ringrose, T. J. and Patel, M. R. (2011). In situ measurements of particle load and transport in dust devils. Icarus, 214(2) pp. 766–772.

Full text available as:
Full text not publicly available
Due to copyright restrictions, this file is not available for public download
Click here to request a copy from the OU Author.
URL: http://dx.doi.org/10.1016/j.icarus.2011.03.013
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/j.icarus.2011.03.013
Google Scholar: Look up in Google Scholar

Abstract

In situ (mobile) sampling of 33 natural dust devil vortices reveals very high total suspended particle (TSP) mean values of 296 mg m−3 and fine dust loadings (PM10) mean values ranging from 15.1 to 43.8 mg m−3 (milligrams per cubic meter). Concurrent three-dimensional wind profiles show mean tangential rotation of 12.3 m s−1 and vertical uplift of 2.7 m s−1 driving mean vertical TSP flux of 1689 mg m−3 s−1 and fine particle flux of ~1.0 to ~50 mg m−3 s−1. Peak PM10 dust loading and flux within the dust column are three times greater than mean values, suggesting previous estimates of dust devil flux might be too high. We find that deflation rates caused by dust devil erosion are ~2.5–50 μm per year in dust devil active zones on Earth. Similar values are expected for Mars, and may be more significant there where competing erosional mechanisms are less likely.

Item Type: Journal Article
Copyright Holders: 2011 Elsevier Inc.
ISSN: 0019-1035
Keywords: Mars; atmosphere; Earth
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 29259
Depositing User: Matthew Balme
Date Deposited: 17 Aug 2011 10:56
Last Modified: 04 Feb 2013 17:31
URI: http://oro.open.ac.uk/id/eprint/29259
Share this page:

Actions (login may be required)

View Item
Report issue / request change

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340   general-enquiries@open.ac.uk