RELEASE_NOTES for CMAQv4.5 - 15 Sep 2005


The changes and new features of this release are:

1)  Aerosols
        - Added sea salt (fine equilibrium; non-interactive coarse
          mode) -- aero4
        - Updated aerosol dry deposition algorithm
        - Updated mechanism include files to remove any aerosol species
          with zero concentrations for aero4
        - Updated ISORROPIA to v1.5 (25 Oct 2003) and fixed some
          discontinuities
        - Added diagnostic variables to calculate PM2.5 concentrations
        - Corrected bug in mode merging to reduce mode crossover
        - Modified SO4 used in ISORROPIA call
        - Corrected inconsistency in MINL2SG (aerodepv)
        - Corrected the EMSULF (H2SO4 emissions) unit conversion bug

2)  Chemistry
        - Added CB4/chlorine chemistry and associated EBI solver
        - Added CB4/air toxics and SAPRC99/air toxics chemistry and 
          associated EBI solvers
        - Added degradation algorithm to the generalized solvers
        - Corrected treatment of convergence failures in EBI solvers
        - No longer support the RADM2 mechanism

3)  P-in-G
        - Improved calculation of plume centerline
        - Fixed bug in the aerosol species array subscripting
        - Corrected error in non-reactive species NH3 fluxes and dry
          deposition

4)  PBL modeling
        - Updated to use PURB (% urban) for setting minimum Kz

5)  Clouds
        - Added new sub-grid cloud mixing algorithm/module
          (based on ACM)
        - Added new cloud diagnostic variables
        - Corrected the interpolation times for resolved clouds (to
          time-step midpoint) and for subgrid clouds (to half hour)

6)  Advection
        - Added new mass continuity scheme

7)  Other
        - Added dynamic vertical layer allocation
        - Added primary carbon source apportionment capability
        - Added sulfate tracking capability