Planned Changes to Eta-12 (Ferrier)

• Total condensate fields properly cycled in EDAS – major task whenever the size & content of restart file changes

• Gridscale cloud & precipitation microphysics:

  • Set the lower limit for all forms of condensate to a mixing ratio of 1.e-12 kg kg-1throughout the model
  • Tunable parameters based on grid resolution (e.g. threshold relative humidity for onset of condensation, and threshold cloud mixing ratio for autoconversion to rain) are assumed to vary linearly as a function of grid resolution
  • Corrected probabilistic freezing of rain as a function of temperature to remove an underflow error
  • Corrected an error representing the number concentration of nucleated ice crystals between -5C and -10C.