5.  Developmental Testbed Center
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5. Developmental Testbed Center. Preliminary Core Test Results. Bob Gall. 18 April 2006. Core Test. Cases: Complete two retrospective runs per day, two months per season, all four seasons for both WRF-NMM and ARW (960 runs) Domains: nearly (99%) identical (dissimilar map projections)

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18 April 2006

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18 april 2006

5. Developmental Testbed Center

Preliminary Core Test Results

Bob Gall

18 April 2006


18 april 2006

Core Test

  • Cases: Complete two retrospective runs per day, two months per season, all four seasons for both WRF-NMM and ARW (960 runs)

  • Domains: nearly (99%) identical (dissimilar map projections)

  • Verification: exclude 5-grid point “halo” region outside common domain

  • Resolution: 13km for both cores (RUC resolution)

  • Vertical resolution: 50 levels for both cores, similar distribution

  • Initial conditions: RUC-13 for both cores (imposes domain limit)

  • Soil initial conditions: Noah LSM “option 99” (RUC LSM in Phase 2)

  • Boundary conditions: 6-h NAM for both cores (as with RUC)

  • Phase 1 (Dec05-Mar06): Use NMM physics for both dynamic cores

    • More tractable task to port NMM physics to ARW core than v.v.

    • “NMM physics”: Ferrier microphysics, MYJ PBL, BMJ convective scheme

  • Phase 2(Mar06-Jun06): Use “RUC-like” WRF-RR physics for both dynamic cores (requires porting of NCAR/RUC physics to NMM)


250 mb temperature

250 mb Temperature


500 mb temperature

500 mb Temperature


Temperature all levels

Temperature all levels


Relative humidity all levels

Relative Humidity all levels


250 mb wind vector

250 mb Wind Vector


Wind vector all levels

Wind Vector All Levels


Precipitation

Precipitation


18 april 2006

Time step 36 sec NMM

50 sec ARW

Ratio ARW/NMM

1.40

Time step 30 sec NMM

72 sec ARW

Ratio ARW/NMM

1.08

Preliminary Timing ResultsCore test domain and resolutionforecast duration 24 hoursPhysics calls:Radiation every 30 min both modelsOther physicsEvery other time step NMMEvery time step ARW


18 april 2006

End


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