Modeling of particulate matter transport in atmospheric boundary layer following dust emission from source areas

Itzhak Katra, Tov Elperin, Andrey Fominykh, Boris Krasovitov, Hezi Yizhaq

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A two-dimensional model for particulate matter (PM) dispersion due to dust emission from soils is presented. Field experiments were performed at a dust source site (Negev loess soil) with a portable boundary layer wind tunnel to determine the emitted PM fluxes for different wind speeds and varying soil conditions. The numerical model is formulated using parameterizations based on the aeolian experiments. The wind velocity profiles used in the simulations were fitted from data obtained in field measurements. Size distribution of the emitted dust particles in the numerical simulations was taken into account using a Monte Carlo method. The PM concentration distributions at a distance of several kilometers from the dust source under specific shear velocities and PM fluxes from the soil were determined numerically by solving advection-diffusion equation. The obtained PM10 concentrations under typical wind and soil conditions are supported by PM data recorded over time in a standard environmental monitoring station. The model enhances our capacity of quantification of dust processes to support climate models as well as health risk assessment.

Original languageEnglish
Pages (from-to)147-156
Number of pages10
JournalAeolian Research
Volume20
DOIs
StatePublished - 1 Mar 2016

Keywords

  • Advection-diffusion equation
  • Aeolian processes
  • Dust emission
  • PM
  • Portable wind tunnel
  • Wind mast

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