SMHI operational HIRLAMEWGLAM 2004 4 - 7 October , OSLO

Lars Meuller SMHI

Backup: SGI ORIGIN 3800 • 128 MIPS R14000 processors • 128 GFLOPS peak performance • 128 GB shared memory • IRIX operating system • LSF batch system

PLANS • Hirlam version 6.3.4• 4D-VAR on limited area• improved treatment of snow in ISBA• new observations VAD wind profiles GPS humidity AMSU-B humidity ( over sea ) • test of non hydrostatic model

Operational HIRLAM

• 4 forecasts every day. HIRLAM22 and HIRLAM11 00z, 06z, 12z, 18z• HIRLAM22 analysis + 48 hour 2 hours cutoff• HIRLAM 11 analysis + 24 hour 1 hour 15 min cutoff • ECMWF preprocessing SYNOP, TEMP, PILOT, BUOY, AIREP, AMDAR• ATOVS AMSU-A radiances – EARS ( over sea )• VAD-winds passive

Hirlam system

HIRLAM version 5.1.4 • 3D-VAR analysis • DFI initialisation• ISBA ( surface scheme )• CBR ( turbulence )• Kain-Fritsch ( convection )• Rasch-Kristjansson ( large scale ) • MPI parallel

HIRLAM22• 40 levels, 0,2O (22km) horizontal resolution• 306x306 gridpoints• ECMWF boundaries every 3h - BC• Semi-Lagrangian time stepping 10 min

HIRLAM11 • 60 levels, 0,1O (11km) horizontal resolution • 246x268 gridpoints • HIRLAM22 boundaries • Semi-Lagrangian time stepping 5 min

Computer system at the National Supercomputing Centre at Linköping University

Operational :

PC-cluster HOME-MADELinux RedHatIntel, GNU and PGI compilersScaMPI, MPICH,LAM mpi-libIntel MKL – Math Kernal LibraryOpen PBS batch system

New cluster > 80 PEdiscussions started

www.nsc.liu.se

precip

10 m windCoastal stations