air quality assessment & management
Reference and User Manual
AirWare   On-line Reference Manual
  Release Level 7.0
  Revision Level beta
  Release Date 2015 03

Last modified on:   Sunday, 19-Jul-15 07:32 CEST

The DUST emision model for natural, wind entrained particulates provide an hourly estimate of PM10 on a 1 km regular grid.

The dust emission data due to entrainment and re-entrainment of deposited dust provide dynamic and distributed input to any transport model like CAMx, that can processes an emision matrix for (long-range) transport and deposition, and ambient concentration estimates together with any other, pyrogenic (industrial, domestic, and traffic emissions including sdhipping and air transport) or mechanical activity (mining, construction, traffic).

Wind is used as the main driver for a non-linear threshold model of erosion and entrainment. The erodibility of the surface in any grid are depends on

  • basic landuse, with special treatment of built-up areas ( cities and setlement, industrial installations, unpoaved roads, open mines, temporary construction sites)
  • land cover, primarily vegetation (bare soils, herbaceous and woody)
  • soil moisture (estimated by the meteorological models MM5 and/or WRF)
  • relief energy, defined as the average, normalized elevation differences with a square kilometer, derived from th eunderlying high-resolution (30m) DEM.

The DUST model uses hourly bottom-layer wind data derived from MM5 results (hourly, 3 km resolution) using diagnostic interpolation down to 1 km horizontal spatial resolution. The average hourly wind as computed by MM5 (or the alternative prognostic, non-hydrostatic WRF model) is converted to a wind speed distribution within the hour, based on the Weibull function.

The input data and the files used by the model are described in a separate manual page Dust entrainment: model inputs

The DUST model provides its output (hourly matrix of PM10 emission values) directly to CAMx within AirWare, but in parallel generates these matrices as export files in NetCDF raster format for use with any other transport and dispersion model.

Specifc topics covered in the manual include:

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