Papers on Climate and Atmospheric Physics
A new model for dust emission by saltation bombardment
Article first published online: 21 SEP 2012
Copyright 1999 by the American Geophysical Union.
Journal of Geophysical Research: Atmospheres (1984–2012)
Volume 104, Issue D14, pages 16827–16842, 27 July 1999
How to Cite
1999), A new model for dust emission by saltation bombardment, J. Geophys. Res., 104(D14), 16827–16842, doi:10.1029/1999JD900169., and (
- Issue published online: 21 SEP 2012
- Article first published online: 21 SEP 2012
- Manuscript Accepted: 25 FEB 1999
- Manuscript Received: 12 JUL 1998
In this paper, we present an analysis on the mechanism of dust emission and describe a new model for the prediction of dust emission rate caused by saltation bombardment, based on the volume removal by impacting sand grains as they plough into the soil surface. The model predicts a relationship between the removed volume V and the particle impacting velocity U of the form V ∝ Un, with n = 2 ∼ 3. The dust emission rate is found to be proportional to u*n + 1, where u* is friction velocity. These model predictions are consistent with wind tunnel and field observations. The model offers a new interpretation of observed data and a simple scheme for the calculation of dust emission.