Mesoscale Parallel Experiment Change Log

Experiment Name:  Eta-32 with modified Eta land-surface physics

When Who What
2004/09/09/00 Mitchell, Ek
  • Change "LAI_DATA" in LSM physics from 4.0 to 3.0
    • 2004/09/02/12 Ferrier, Mitchell
  • Revert to ops versions of MIXLEN, PRODQ2, switch to experimental versions of DIFCOF, TURBL, SFCDIF (see 8/23/04 entry)
  • Change "LAI_DATA" in LSM physics from 5.0 to ops value of 4.0
  • Cycled EDAS restarted from ETAZ (current parallel running new Noah LSM w/hi-res soil and veg types)
    • 2004/09/01/12 Ferrier, Mitchell
  • Restore CZIL to test value of 0.1 in SFCDFI
    • 2004/09/01/00 Ferrier, Mitchell
  • Revert back to ops CZIL value of 0.2 in routine SFCDIF
    • 2004/08/31/00 Lin
  • New precipitation assimilation scheme (routine ADJPPT) modified to account for the fact that the variable F_rain is actually the fraction of liquid condensate that is rain, not the fraction of total condensate that is liquid rain
    • 2004/8/27/12 Ferrier, Mitchell
  • Replace operational version of subroutine PRODQ2 with test version (see 4/30/04 entry
  • Cycled EDAS restarted from ETAZ (current parallel running new Noah LSM w/hi-res soil and veg types)
    • 2004/8/25/12 Ferrier, Mitchell
  • Replace operational version of subroutine MIXLEN with test version (see 4/30/04 entry)
    • 2004/8/23/12 Ek, Mitchell
  • Revert back to using new hi-res soil definitions (see 7/1/04 entry)
  • Revert back to using operational Eta PBL physice routines DIFCOF, MIXLEN, PRODQ2, TURBL, SFCDIF (see 4/30/04 entry), except that parameter CZIL is kept at 0.1 in SFCDIF (CZIL=0.2 in control run)
  • Cycled EDAS restarted from ETAZ (current parallel running new Noah LSM w/hi-res soil and veg types)
    • 2004/8/5/12 Ek, Mitchell
  • Parameter SMHIGH_DATA reduced from 6.0 to 3.0; this will raise the value of the reference soil moisture value below which vegetation becomes stressed (SMCREF), which (at first order) should reduce the transpiration (surface moisture flux).
    • 2004/7/28/12 Ek, Mitchell, Wong
  • Revert back to using old 1 deg lat/lon soil type data set w/9 categories:
  • SOIL TYPES FROM ZOBLER (1986), BILL COSBY ET AL (1984)
    1. COARSE ; LOAMY SAND
    2. MEDIUM ; SILTY CLAY LOAM
    3. FINE ; LIGHT CLAY
    4. COARSE-MEDIUM ; SANDY LOAM
    5. COARSE-FINE ; SANDY CLAY
    6. MEDIUM-FINE ; CLAY LOAM
    7. COARSE-MED-FINE ; SANDY CLAY LOAM
    8. ORGANIC ; LOAM
    9. GLACIAL LAND ICE ; LOAMY SAND
  • Cycled EDAS restarted from ETAZ
    • 2004/7/1/12 Ek, Wong, Mitchell. Rogers
  • Upgrade to version 2.8 of NoahLSM with new hi-res soil and vegetation type definitions:
  • CLASS USGS-WRF VEGETATION/SURFACE TYPE
    1. Urban and Built-Up Land
    2. Dryland Cropland and Pasture
    3. Irrigated Cropland and Pasture
    4. Mixed Dryland/Irrigated Cropland and Pasture
    5. Cropland/Grassland Mosaic
    6. Cropland/Woodland Mosaic
    7. Grassland
    8. Shrubland
    9. Mixed Shrubland/Grassland
    10. Savanna
    11. Deciduous Broadleaf Forest
    12. Deciduous Needleleaf Forest
    13. Evergreen Broadleaf Forest
    14. Evergreen Needleleaf Forest
    15. Mixed Forest
    16. Water Bodies
    17. Herbaceous Wetland
    18. Wooded Wetland
    19. Barren or Sparsely Vegetated
    20. Herbaceous Tundra
    21. Wooded Tundra
    22. Mixed Tundra
    23. Bare Ground Tundra
    24. Snow or Ice
    25. Playa
    26. Lava
    27. White Sand
  • SOIL TYPE CLASS
    1. SAND
    2. LOAMY SAND
    3. SANDY LOAM
    4. SILT LOAM
    5. SILT
    6. LOAM
    7. SANDY CLAY LOAM
    8. SILTY CLAY LOAM
    9. CLAY LOAM
    10. SANDY CLAY
    11. SILTY CLAY
    12. CLAY
    13. ORGANIC MATERIAL
    14. WATER
    15. BEDROCK
    16. OTHER(land-ice)
    17. PLAYA
    18. LAVA
    19. WHITE SAND
    • 2004/6/1/12 Lin, Ek
  • Added new precipitation assimilation algorthim currently running in ETAZ:
  • The precipitation assimilation algorthim in the EDAS has been modified to be less aggressive by eliminating the addition/creation of latent heat and moisture fields . Details can be found at http://www.emc.ncep.noaa.gov/mmb/ylin/newpptasm/
    • 2004/5/13/12 Rogers
  • EDAS restarted from ETAV control. The previous restart was not done cleanly with respect to the EDAS precipitation budget history file; it only picked up the ETAV pcphistory_budget file, not the necessary snow ratio files and EGRDSF files.
    • 2004/4/30/12 Ek, Mitchell
  • DIFCOF.F & TURBL.F changed: In very stable conditions when the PBL depth is diagnosed as the lowest Eta model level above the surface, impose a lower limit on eddy diffusivity (Km,Kh) of 0.5 m^2/s up to (and one level above) the inversion height in order to maintain atmospheric turbulent mixing at least above this nominally small value.
  • EDAS restarted from ETAV control
    • 2004/4/9/12 Ek, Mitchell
  • Changes to parameters (SALP, SNUP) in the patchy snow cover formulation so as to decrease the snow depth (via snow-water-equivalent) for 100 percent snow cover, and thus increase the surface albedo for a given snow cover.
  • Removed 3/25/2004 changes to DIFCOF and TURBL
  • EDAS restarted from ETAY control
    • 2004/3/25/00 Ek, Janjic, Mitchell
  • DIFCOF.F & TURBL.F changed: In very stable conditions when the PBL depth is diagnosed as the lowest Eta model level above the surface, impose a lower limit on eddy diffusivity (Km,Kh) of 0.5 m^2/s up to (and one level above) the inversion height in order to maintain atmospheric turbulent mixing at least above this nominally small value.
  • EDAS restarted from ETAY control
    • 2004/3/1/12 Ek, Mitchell
  • DIFCOF.F changed: Impose a lower limit on eddy diffusivity (Km,Kh) of 0.5 m^2/s in order to maintain atmos turbulent mixing at least above this nominally small value.
  • EDAS restarted from ETAY control
    • 2004/2/27/00 Y. Lin, Rogers
  • ADJPPT2.F is changed so that we do NOT increase cloud ice proportionally when Pobs > Pmod. The old set up can lead to excess build-up of CWM. Changed in all 32 km runs.
    • 2004/2/17/12 Rogers
  • Discovered that ETAV (32-km control) was not using GOES-12 radinaces, while ETAY aand ETAL were. GOES-12 weas turned on in ETAV and ETAY, ETAL were restarted from ETAV EDAS.
    • 2004/2/13/12 Ek, Mitchell, Rogers
  • Included zenith angle fix (valid at top of the hour) in RADTN; removed erroneous version of this fix in CHKOUT (Both also changes in ETAV control)
  • Removed use average temperature of the lowest 2 atmos levels (above the surface) in the longwave radiation adjustment
  • SFLX changed : Code invokes a non-linear weighting in the Noah LSM skin temperature over snow versus over patches of snow-free ground (thus when snow cover is less than 100 percent), such that the skin temperature over patches of snow-free ground weighs more, yielding higher skin temperatures and greater surface sensible heat flux over a particular model gridbox for a given snow cover fraction compared to the control case (which has linear weighting)
  • ETAV control upgraded to use Mar 2004 version of the ops Eta model, including bias adjustment of precip analyses, use of precip type from microphysics in LSM.
  • EDAS restarted from ETAV control
    • 2004/2/4/12 Ek, Mitchell
  • Change : Use average temperature of the lowest 2 atmos levels (above the surface) in the longwave radiation update.
  • EDAS restarted from ETAV for ETAL and ETAY
    • 2004/1/28/12 Ek, Mitchell
  • Change SURFCE to remove diurnal adjustment to albedo, reverting back to the use of the mid-day albedo (corrected for snow cover) throughout the day
  • EDAS restarted from ETAV for ETAL and ETAY
    • 2004/1/9/00 Ek, Mitchell
  • CZIL in subroutine SFCDIF was changed from 0.05 to 0.1
    • 2003/12/31/12 Freedman, Ek, Mitchell
  • Subroutine SFCDIF was changed : For the profile functions for the very stable boundary layer (z/L=>1), impose a consistent limit on z0/L.
    • 2003/12/24/12 Freedman, Ek, Mitchell
  • Changes to subroutines MIXLEN and PRODQ2 which removes mixing length limits under stable conditions -- should increase (downward) turbulent heat mixing in stable conditions.
    • 2003/12/19/12 Ek, Mitchell
  • Removed test using the average temperature of the lowest 3 atmos levels (above the lowest atmos level above the surface) in the longwave radiation update.
  • Changes to two parameters (SNUP, SALP) in the snow-cover fraction formulation so as to decrease snow cover fraction (and hence decrease snow albedo) for a given snowdepth (given snow water equivalent) below a (now higher) threshhold for the snowdepth.
  • Diurnally adjusted surface albedo fed to Noah LSM model
  • ETAL EDAS restarted from ETAY control
    • 2003/12/08/12 Ek, Mitchell
  • Reduction in CZIL from 0.1 (for ETAX, vs 0.2 for ops Eta) to 0.05 for ETAL which may reduce (increase) the daytime (nighttime) skin temperatures by increasing the roughness length for heat and thus increase the turbulent heat fluxes.
  • Test using the average temperature of the lowest 3 atmos levels (above the lowest atmos level above the surface) in the longwave radiation update.

    • Page Last Modified: December 8, 2003