WRF Progress at NCEP in 2002
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Transcript of WRF Progress at NCEP in 2002
• Steve Lord led effort to establish WRF MOA.• Implemented the Janjic Nonhydrostatic Meso
Model (NMM) in 8 km HiResWindow and in 4km On-Call Emergency Response (OCER) system - establishing NCEP’s baseline for WRF.
• Made available 30-day retrospective data sets (BUFR & GRIB) suitable for WRF testing.
• Adapted (with NSSL) NCEP operational NMM postprocessor to WRF standards, issued code and users’ guide.
WRF Progress at NCEP in 2002
WRF Progress at NCEP in 2002
• Converted Eta & NMM dynamics and all physics modules to WRF coding standards.
• Ensured all converted code reproduced NCEP control version results (VERY IMPORTANT).
• Final step to wrap NMM under WRF modeling infrastructure underway - implementation scheduled for 4Q FY2003.
• Made EMC’s grid-to-obs verification codes available with users’ guide.
• Unification (with AFWA) of Land-Surface Model in WRF framework nearing completion.
WRF Progress at NCEP in 2002
• NCEP led WG#4 developed beta version of WRF 3DVAR for testing (nearly ready for release)
• NCEP led WG#9 is proactive in setting needs for testing and infrastructure efficiencies.
• NCEP led WG#12 establishes NCEP’s prepared BUFR observation set for use in WRF 3DVAR and in WRF verification using NCEP’s code.
• Duane Stevens (University of Hawaii) at NCEP working with WRF teams (application of Semi-Lagrangian to hurricanes and evaluation of NCAR Eulerian vs NMM over Hawaii)
WRF Progress at NCEP in 2002
• Established Parallel system to run NCAR Eulerian mass model with NCEP physics in identical 8 km HiResWindow configuration
• 4 large domain nests (Western,Central&Eastern CONUS + Alaska)• 2 small domain nests (Hawaii and Puerto Rico)
• Semi-Lagrangian semi-implicit dynamic core:• Generalized vertical coordinate embodies pure sigma and pure
isentropic and ALL hybrids in between• Cascade interpolation allowing forward trajectories• High-order accuracy compact difference schemes• Non-reflective top boundary condition• All development within WRF infrastructure
WRF Development at NCEP/EMC
• FY03 Funding• $1.5 M• $700 K NWS base• $800 K External
• Effort for FY03• Total 14.3 PY (Model and Data Assim)• 7.3 PY for development (Semi-Lagrangian, DA)• 7.0 PY for Mesoscale Branch Infrastructure
• Setting up and making test runs• NMM benchmark codes and runs• WRF System Test Plan (N. Seaman – PSU)