NCEP Modeling Synergy Meeting Highlights: January 28, 2008
This meeting was led by Michael Brennan and attended by Keith Brill, Mary Hart, Geoff DiMego, Ed Danaher, Ken Campana, Vera Gerald, Dave Plummer, and Joe Sienkiewicz. Stephen Jascourt of UCAR/COMET, Rusty Billingsley of Southern Region HQ, David Bright of SPC, and Maj. Eric Dernovish of AFWA attended by remote teleconference.
No representative of NCO was present. A detailed list of all upcoming upgrades and implementations can be found here.
2. NOTES FROM EMC
2a. Global Climate and Weather Modeling Branch
Ken Campana reported briefly on the new GFS upgrade that was detailed in an email earlier this week. The charter containing the details of the upgrade can be accessed at:
This upgrade will involve changes to the GSI, a new quality control scheme, upgrades to the shortwave and longwave radiation physics and the enthalpy replacing virtual temperature as the thermodynamic state variable (due to the model extending beyond the mesosphere). Implementation is tentatively scheduled for April. This implementation will begin running in parallel soon.
The current format GFS spectral coefficient file, using virtual temperature, will continue to be generated for downstream users, at least into 2009. This will be transparent to users and will be in addition to the new format GFS spectral file which contains enthalpy.
2b. Mesoscale Modeling Branch
Geoff DiMego reported on a
2c. Global Ensemble Prediction System
A SREF implementation will begin running in parallel later this year to upgrade the WRF members to the latest available version and increase the resolution of the RSM and WRF members to 32 km (to match the Eta members). Also, the components making up the SREF will be adjusted to include more WRF members. The new SREF will be composed of:
6 Eta members
5 RSM members
10 WRF members (5 NMM, 5 ARW)
2e. Marine Modeling and Analysis Branch
Vera Gerald reported on the following MMAB issues:
version of the
· A parallel version of the wave model ensemble is running, now with 12 members and a longer run time
· A parallel version of the multi grid wave model is now running with output available to 90°N, although currently output north of 76°N is bogus.
· A parallel version of RTOFS is running with a new assimilation scheme and forecast results available out to 6 days, this parallel also includes a updated GFS/HYCOM model interface as well as parallelized post processing.
3. FEEDBACK FROM OPERATIONAL CENTERS/REGIONS
Stephen Jascourt of COMET reported that he had noticed several instances of artificial-looking, stationary narrow zones of enhanced accumulated precipitation and simulated reflectivity in WRF-NMM hi-res-window output. Matt Pyle and others who work on the model are aware of and looking into the problem.
Mike Brennan reported that HPC forecasters had
noticed improved performance of the experimental
4. The next Synergy Meeting will be held Monday, February 25, 2008, at 12:00 pm EST in Room 209 at EMC, with remote conference capability.