A Comparison of Calpuff Modeling Results With 1977 Inel Field Data Results

  • John S. Irwin
Part of the NATO • Challenges of Modern Society book series (NATS, volume 22)


CALPUFF is a non-steady-state, multi-layer puff dispersion model that simulates the effects of time and space varying meteorological conditions. The puff modeling simulation results are compared with data obtained following a single 3-hour late-afternoon tracer release conducted on April 19, 1977 near Idaho Falls, Idaho, USA. Samplers were positioned on arcs at downwind distances of 3.2, 48 and 90 km. Low-level instrumented masts provided hourly values of wind and temperature at 17 sites within the experimental area. Hourly rawindsondes were available 600 m northwest of the release point. And hourly pibals provided winds aloft at three other sites within the area. In this discussion, alternative combinations of the available meteorological data were used to assess the differences to be seen in the simulation results. Analysis of the results suggests that the simulated lateral dispersion along each arc was best characterized when all of the surface and upper wind observations were used and that the position of the simulated maximum on each arc was poorly characterized regardless of data used.


Wind Field Cylinder Sample Vertical Dispersion Lateral Dispersion Similarity Dispersion 
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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • John S. Irwin
    • 1
  1. 1.Atmospheric Sciences Modeling Division, Air Resources LaboratoryNational Oceanic Atmospheric AdministrationResearch Triangle ParkUSA

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