Model History & Features
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Version History

            1.0 – 1979          rawinsonde data with day/night (on/off) mixing

NOAA Tech Memo ERL ARL-112 (1982)

 

            2.0 - 1983           rawinsonde data with continuous vertical diffusivity

NOAA Tech Memo ERL ARL-166 (1988)

 

            3.0 - 1987           model gridded fields with surface layer interpolation

NOAA Technical Memo ERL ARL-195 (1992)

 

            4.0 - 1996           multiple meteorological fields and combined particle-puff

NOAA Technical Memo ERL ARL-224 (1997) 

 

4.0 – 8/1998    switch from NCAR to postscript graphics for PC

4.1 – 7/1999    isotropic turbulence for short-range simulations

4.2 – 12/1999  terrain compression of sigma & use of polynomial

4.3 – 3/2000    revised vertical auto-correlation for dispersion

4.4 – 4/2001    dynamic array allocation and support lat-lon grids  

4.5 – 9/2002    ensemble, matrix, and source attribution options

4.6 – 6/2003    non-homogeneous turbulence correction, dust storm

4.7 – 1/2004    velocity variance, TKE, new short-range equations

4.8 – 2006    CMAQ compatibility, expanded ensemble options, plume rise, Google Earth, trajectory clustering, staggered grids

 

            5.0 - 2008           direct I/O GRIB files and WRF interface

Features

            - Predictor-corrector advection scheme

            - Linear spatial & temporal interpolation of meteorology from external sources

            - Vertical mixing based upon SL similarity, BL Ri, or TKE

            - Horizontal mixing based upon velocity deformation, SL similarity, or TKE

            - Puff and Particle dispersion computed from velocity variances

            - Concentrations from particles-in-cell or Top-Hat/Gaussian distributions

- Multiple simultaneous meteorology and/or concentration grid