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Environmental Fluid Mechanics

, Volume 8, Issue 4, pp 367–387 | Cite as

Sensitivity of atmospheric dispersion simulations by HYSPLIT to the meteorological predictions from a meso-scale model

  • Venkata Srinivas Challa
  • Jayakumar Indrcanti
  • Julius M. Baham
  • Chuck Patrick
  • Monika K. Rabarison
  • John H. Young
  • Robert Hughes
  • Shelton J. Swanier
  • Mark G. Hardy
  • Anjaneyulu YerramilliEmail author
Original Article

Abstract

Mesoscale transport and dispersion of air pollutants from a few major point sources in the Mississippi Gulf coastal region is calculated using a coupled modeling system consisting of the atmospheric dynamical model WRF and the lagrangian particle model HYSPLIT. The sensitivity of the dispersion model results to the meteorological fields is studied by conducting an ensemble of simulations using the WRF model for the same dispersion case. Several parameterization schemes for the physical processes of boundary layer turbulence and land surface temperature/moisture prediction in WRF are used in various combinations to produce different meteorological members which are then used for dispersion simulation. The uncertainty in the simulated concentration probabilities to the meteorological model configurations and the ensemble mean are presented. The parameters used for determining the uncertainties include the wind fields, temperature, area of concentration and the levels of concentration. The results indicate that dispersion model results are influenced by the choices made in respect of the planetary boundary layer and land surface schemes in the mesoscale model to produce the meteorological forecast thereby leading to certain amount of uncertainty in the resultant concentrations. Results show that the specific choices made about the atmospheric model configuration can significantly after the simulated concentrations.

Keywords

Meso scale Atmospheric dispersion WRF HYSPLIT Sensitivity 

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Venkata Srinivas Challa
    • 1
  • Jayakumar Indrcanti
    • 1
  • Julius M. Baham
    • 1
  • Chuck Patrick
    • 1
  • Monika K. Rabarison
    • 1
  • John H. Young
    • 1
  • Robert Hughes
    • 1
  • Shelton J. Swanier
    • 1
  • Mark G. Hardy
    • 1
  • Anjaneyulu Yerramilli
    • 1
    Email author
  1. 1.Trent Lott Geospatial and Visualization Research CentreJackson State UniversityJacksonUSA

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