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The role of the atmospheric electric field in the dust-lifting process

Journal
Date Issued
2016
Author(s)
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Taj-Eddine, K.
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Ori, G. G.
DOI
Abstract
Mineral dust particles represent the most abundant component of atmospheric aerosol in terms of dry mass. They play a key role in climate and climate change, so the study of their emission processes is of utmost importance. Measurements of dust emission into the atmosphere are scarce, so that the dust load is generally estimated using models. It is known that the emission process can generate strong atmospheric electric fields. Starting from the data we acquired in the Sahara desert, here, we show for the first time that depending on the relative humidity conditions, electric fields contribute to increase up to a factor of 10 the amount of particles emitted into the atmosphere. This means that electrical forces and humidity are critical quantities in the dust emission process and should be taken into account in climate and circulation models to obtain more realistic estimations of the dust load in the atmosphere.

Volume
43
Issue
10
Start page
5501
Uri
Url
Issn Identifier
0094-8276
Ads BibCode
2016GeoRL..43.5501E
Rights
open.access
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