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Nested Hourly Analysis A separate nested version of Hirlam is run every hour on a dual-processor 500Mhz PC running Linux. The run provides an hourly analysis and also a short range [3-hour] local forecast. Forecast Model: Hirlam 4.3 forecast model in conjunction with the Hirlam 4.8 OI analysis scheme. Vertical grid: A set of 24 hybrid [eta] levels. Horizontal grid: A rotated latitude-longitude grid is used with the South-Pole at -9˚ longitude, -38˚ latitude). There are 97x98 grid points with a resolution of 0.15˚ x 0.15˚. Experiments with Linux Cluster Met Éireann started to experiment with running Hirlam on a Linux cluster in early 2004. The experiences have been generally good. The cluster performance is similar to the IBM mainframe with the current operational system [Hirlam 5.0.1 and 3DVAR]. We are experimenting with Hirlam 7.0.1. Cluster Hardware: The cluster consists of 10 rack mounted Dell Poweredge 1750 nodes (i.e. 1 master node and 9 compute nodes). The master node has dual 2.8GHz Xeon processors with 4 Gigabytes of ECC DDR RAM; each compute node has dual 3.2GHz Xeon processors with 2 Gigabytes of memory. The compute nodes are connected as a two-dimensional torus via 4 Port Dolphin SCI HBA cards. Cluster Software: (a) Operating system: Redhat ES 3.0 / WS 3.0 (b) Networking software: Scali MPI connect, Scali TCP connect, Scali Manage; (c) Compilers: PGI cluster development kit and Intel Fortran compiler. Sample Products The following are some examples of typical Hirlam output as displayed on the forecaster’s workstation [using the xcharts graphics program]. The first chart shows accumulated rainfall: 106
The next chart shows wind arrows at 500hPa. The colour of each arrow has been chosen to indicate the temperature at that level: Replacement of Mainframe Our IBM mainframe is coming to the end of its life [maintenance is getting too expensive] and we hope to find a replacement system within the next 1twelve months. One option would be to purchase a large linux cluster [or equivalent] but we are also looking at other possibilities including outsourcing. However, no final decision is likely for at least a few more months. We plane to run a nested system using Hirlam 7.0.1 [or a later version, if available]. The outer area will be the same as our current area but with 60 levels; the inner area is still being considered. 107
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NEWSLETTER of the 28 th EWGLAM and
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Newsletter of the 28th EWGLAM and 1
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6.2 P. Clark et al.: The Convective
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1.1 Foreword In 2006, MeteoSwiss ha
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Cornel Soci National Meteorological
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16:15 - 16:45 Filip Vana general Dy
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2 Consortia and ECMWF reports 12
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Research Progress at ECMWF 2005-200
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ocean data assimilation system for
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Physical Aspects 1) The introductio
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either with a 1-dimensional observa
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2.2 ALADIN 22
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Another important event happened, i
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• However inspection of T2m forec
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Figure 4: One case of intercomparis
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The COSMO Consortium in 2005-2006 T
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2. Model system overview The key fe
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Data Assimilation for LM Method: Nu
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2. LM performance known, critically
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expected to result in an improved r
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Schrodin, R. and H. Heise, 2002: Th
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HIRLAM-A activities in 2006 Jeanett
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addition, research on the construct
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HIRLAM Reference System development
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Fig. 2: Case study for 10 June 2006
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Unified Model Developments 2006 Met
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Figure 4: Noise in increments from
Page 57 and 58: Cycle Date Model change and impact
Page 59 and 60: 1.5km On-demand model Figure 8: 1.5
Page 61 and 62: 3.1 Belgium 59
Page 63 and 64: • A prognostic mass-flux scheme f
Page 65 and 66: Perspectives The integrated package
Page 67 and 68: 3.2 Croatia 65
Page 69 and 70: New computer Core of the new comput
Page 71 and 72: 3.3 Czech Republic 69
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Page 79 and 80: LAM efforts at Estonian Meteorologi
Page 81 and 82: grid is 186x170 points in horizonta
Page 83 and 84: McDonald, A., and J. E. Haugen, 199
Page 85 and 86: Operational NWP Activities at the F
Page 87 and 88: Model Forecast model Limited area g
Page 89 and 90: 3.7 France 87
Page 91 and 92: Fig.1. The ALADIN-France domain, wi
Page 93 and 94: Towards AROME, A first try of a Rap
Page 95 and 96: Status Report of the Deutscher Wett
Page 97 and 98: In August 2006 production with the
Page 99 and 100: 3.9 Hungary 97
Page 101 and 102: • LBC coupling at every 3 hours O
Page 103 and 104: IFS as driving model for ALADIN. Th
Page 105 and 106: 3.10 Ireland 103
Page 107: Filtering: Fourth order implicit ho
Page 111 and 112: Italian Meteorological Service Stat
Page 113 and 114: Fig.3 Integration domain for LM- EU
Page 115 and 116: 3.12 Netherlands 113
Page 117 and 118: esults with fixed entrainment and d
Page 119 and 120: simulation. In order to allow a goo
Page 121 and 122: layer for three contrasting nights
Page 123 and 124: 21 UTC). The severe thunderstorm fo
Page 125 and 126: Limited Area Modelling Activities a
Page 127 and 128: (a) Figure 2 ALADIN/Portugal geogra
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Page 131 and 132: LAM ACTIVITIES IN ROMANIA Cornel SO
Page 133 and 134: Fig.3 HRM domain, 78 cumulated prec
Page 135 and 136: - Experiments : variation of the fr
Page 137 and 138: NWP activities at Slovak Hydrometeo
Page 139 and 140: Operational suite upgrades • 23/0
Page 141 and 142: 3.16 Slovenia 139
Page 143 and 144: First experiments with new physical
Page 145 and 146: • resolution of meteorological fi
Page 147 and 148: NWP activities in INM Bartolomé Or
Page 149 and 150: 1 System definition • Creation of
Page 151 and 152: MSLP June-August 2006 Geopotential
Page 153 and 154: NATIONAL STATUS REPORT on Operation
Page 155 and 156: Model input The observations used f
Page 157 and 158: Numerical Weather Prediction at Met
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The setup is based on a new numeric
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weight of importance in the voting
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4.1 F. Vana: Dynamics & Coupling, A
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5 Scientific presentations on data
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COSMO: Overview and Strategy on Dat
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Meteorology in Hamburg (MPI-M). The
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temperature forecasts, this had a s
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5.2 D. Leuenberger et al.: The Late
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scaling factor α and of the latent
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a) b) RAD 1 2 3 4 5 6 7 8 9 10 det
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5.3 C. Fischer and A. Horanyi: Alad
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Figure 1: analysis increments of wi
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3) Averaged emissivities + dynamica
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In parallel, a direct radar observa
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►Algorithms: • FGAT (with Hunga
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Data assimilation activities in LAC
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Fig.3 RMSE difference (WDEF-NAM2).
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6 Scientific presentations on physi
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Physics improvements in the NAE mod
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The top panel in figure 3 shows tha
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The Murk aerosol is based on the ur
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Relaxation term Due to these proble
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Figure 12: SOx emissions in 1990 an
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Buncefield oil depot fire Figure 15
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6.2 P. Clark et al.: The Convective
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y the model (e.g. streaks of gradua
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the Met Office Large Eddy Model (LE
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Figure 4 Domains used in high resol
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1.0 95th percentile threshold Fract
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Figure 10 Surface precipitation rat
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HIRLAM Physics developments Sander
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strong winds. This causes a too lar
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epresenting the weather in the case
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ALARO-0 Physics developments at LAC
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eflectance for sample of 3-layer in
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2.1 Pseudo prognostic turbulent kin
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TKE and the integral buoyancy of th
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7 Scientific presentations on predi
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LAMEPS Development of ALADIN-LACE Y
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The more iterations performed, the
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uncertainty in the model physics, t
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In Budapest, dynamical downscaling
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7.2 J. García-Moya et al.: Recent
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Currently the size of the super ens
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Palmer, T.N., Alessandri, A., Ander
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Figure 4 Example of probability map
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More than 15 mm/6 hours Figure 6 Re
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7.3 C. Marsigli et al.: The COSMO S
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Overview COSMO ensemble systems Pie
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COSMO-LEPS 16-MEMBER EPS An objecti
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The used models are LAMI (Italy), a
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28th EWGLAM Meeting 9-11 October 20
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9 SRNWP business meeting report 293
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Minutes of the Meeting Participatio
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Training and Education Activities i
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These reports were very divers, fro
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Contacts with the Academia In his d
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