Dust Storms using Emissions Climatology


  • Dust modeling requires some assimilative techniques
  • Emission climatology may not represent current conditions:
    • Recent rain ‐ causes crusting and higher thresholds
    • Seasonal rain ‐ lack of or excessive vegetation
    • Previous dust storms ‐ lack of erodible material
    • Previous flooding events ‐ excessive erodible material
  • Analyze climatology files to find maximum emission factors
  • Adjust threshold velocities as needed to trigger emissions



CONTROL_dust4.txt

   maximum emissions




ichem=3

   namelist enable dust emission

100000

   namelist particle number




Run simulation: standard run model menu



AirNow_dust.txt

   PM measurement file

1.0E+06

   convert grams to micrograms