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PLANS HIRLAM version 7.1.2 operational 2007Q4 with 4D-VAR 66 km linear grid

SMHI operational HIRLAM EWGLAM 2007 8-11 october, DUBROVNIK Lars Meuller Swedish Meteorological and Hydrological Institute. Rotated lat/lon South pole at -30 / -10. Operational HIRLAM 4 forecasts a day. 00, 06, 12 and 18 UTC HIRLAM C22 – analysis +48 hours

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PLANS HIRLAM version 7.1.2 operational 2007Q4 with 4D-VAR 66 km linear grid

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  1. SMHI operational HIRLAMEWGLAM 2007 8-11 october, DUBROVNIKLars MeullerSwedish Meteorological and Hydrological Institute Rotated lat/lon South pole at -30 / -10 • Operational HIRLAM • 4 forecasts a day. 00, 06, 12 and 18 UTC • HIRLAM C22 – analysis +48 hours • 2 hours data cutoff • HIRLAM E11 – analysis +72 hours • 1 hour 25 min data cutoff • HIRLAM G05 – analysis + 48 hours • nested to E11 • ECMWF preprocessing • SYNOP,SHIP,TEMP,PILOT, • BUOY,AIREP,AMDAR • BUFR AMDAR • ATOVS AMSU-A radiances – EARS • HIROMB oceanographic model for ice cover and SST • HIRLAM system • Based on HIRLAM version 6.3.5 • 3D-VAR FGAT ( analysis ) • DFI ( initialisation ) • ISBA ( surface scheme ) • moist CBR ( turbulence ) • Kain-Fritsch ( covnvection ) • Rasch-Kristjansson ( large scale ) HIRLAM domain’s C22 E11G05 Levels: 40 60 60 Hor. Res. 0.2° ( 22 km ) 0.1° ( 11 km ) 0.05° ( 5.6 km ) Gridpoints 306×306 256×288 294×441 Boundaries ECMWF 3 hour ECMWF 3 hour E11 every hour Time step 600 sec 300 sec 150 sec • PLANS • HIRLAM version 7.1.2 operational 2007Q4 • with • 4D-VAR • 66 km linear grid • SL, SETTLS • vert. diff. + large scale cond. linearised simplified physics • weak digital constraint • linear propagation of assimilation increments • statistical balance background constraint • 11 km / 60 levels on ~ C-domain 2008Q2 ( on new cluster ) • Forecast Index: • Hit rate for t2m +/- 2-4° • Kuipers index for total cloud cover. • 3 classes. 0-3, 4-6 and 7-8 octas • Kuipers index for precip. • 2 thresholds. 1 and 5 mm / 12 hours • Hit rate for 10m wind • +/- ( 1.7 m/s + 0.195×forecasted value ) • Swedish stations Test with new model Cop – oper Hirlam 6.3.5, 3DVAR Cnn – Hirlam 7.1.2 4DVAR HIRLAM-A at SMHI ALADIN and AROME have been run in research mode with daily forecasts. Results have been used to gain experience in meso-scale modelling. AROME at 2.5 km covering all of Sweden is to expensive to run at present. As a start, ALARO at 5 km (corresponding to G05) will be set up in an pre-operational mode 2007Q4. Version 32t3 Computer system at the National Supercomputing Centre at Linköpings University www.nsc.liu.se • Operational: • BLIXT • Linux • 82 nodes • dual Intel Xeon • 3.2 Ghz, 2 GB memory • Infiniband interconnect • Scali MPI connect • Intel compilers • Open PBS • Backup • BRIS • Linux – Home-made • 16 nodes • dual Intel Xeon • 2.2 Ghz, 1 GB memory • Scali interconnect • ScaMPI, MPICH, LAM • Intel compilers • Open PBS Compuer plans Replacement of BRIS New cluster, BORE, to run HIRLAM with 4D-VAR on 11 km horisontal resolution 606*606*60 gridpoints + AROME Operational 2008Q1 • > 8 cores per node • > 100 nodes • Intel / AMD / ? • Infiniband / InfiniPath / • Myrinet / Qadrics / ? • open until 20071120

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