Dominant environmental parameters for dust deposition and resuspension in desert climates

Benjamin Figgis, Bing Guo, Wasim Javed, Said Ahzi, Yves Rémond

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Field studies of dry deposition usually measure dust accumulation over periods of days or weeks. However, long measurement periods obscure the effects of meteorological conditions on the deposition rate. Previously we developed an “outdoor soiling microscope” (OSM) in order to measure dust deposition and detachment every 10 min in the field. In this study a greased/ungreased pair of OSMs was deployed for 51 days in the desert climate of Doha, Qatar. Stepwise regression analysis was performed to quantify the explanatory power of meteorological parameters on dust deposition and detachment rates. It was found that wind speed dominated deposition and rebound of dust particles, and produced a distinctive “threshold” response in deposition. The dry deposition results were highly consistent with a model by Kim et al. (2000) derived from outdoor experiments. By comparison, relative humidity and particulate matter concentration had less influence on dust flux rates.

Original languageEnglish
Pages (from-to)788-798
Number of pages11
JournalAerosol Science and Technology
Volume52
Issue number7
DOIs
Publication statusPublished - 3 Jul 2018

Fingerprint

resuspension
Dust
dust
dry deposition
Particulate Matter
particulate matter
relative humidity
Deposition rates
regression analysis
Regression analysis
Particles (particulate matter)
wind velocity
desert climate
parameter
Atmospheric humidity
Microscopes
Fluxes
rate
experiment
Experiments

Keywords

  • Nicole Riemer

ASJC Scopus subject areas

  • Environmental Chemistry
  • Materials Science(all)
  • Pollution

Cite this

Dominant environmental parameters for dust deposition and resuspension in desert climates. / Figgis, Benjamin; Guo, Bing; Javed, Wasim; Ahzi, Said; Rémond, Yves.

In: Aerosol Science and Technology, Vol. 52, No. 7, 03.07.2018, p. 788-798.

Research output: Contribution to journalArticle

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