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Figure 7: log10 vis as a function of RH The way to control the relative priority of aerosol and rh increments from vis is via the aerosol background error. This is set to 1.0 in log10 units but we don’t have a good handle on this number. A lower value implies it is more difficult to change MURK, however previous tests with a value of 0.3 made fog forecasts worse. Another simpler way to control these large increments is to simply have a capping limit. This is currently set to 1000 micrograms per kilogram operationally, but tests with a value of 200 micrograms per kilogram (Figure 8) have shown benefit. Figure 8: Impact of reducing AEROMAX from 1000.0 (left hand panel) to 200.0 (right hand panel) 214
Relaxation term Due to these problems in the assimilation process, a “relaxation term” was added to the model. Aerosol amounts are relaxed to 25 micrograms per kilogram over land and 12.5 micrograms per kilogram over sea with a timescale of 2 days. The assumption that the aerosol concentrations over most land points are identical was possibly reasonable in the U.K Mesoscale model. However, this assumption is not appropriate in the NAE. The mass mixing ratio over Greenland or Iceland is clearly not going to be identical to the aerosol mass mixing ratio over continental Europe. It would be better to relax to a climatology field rather than fixed land/sea values or scrap the relaxation completely if we could reduce our data assimilation problems. Murk sources Figure 9: Aerosol emissions at 20.0 metres and 320 metres over the U.K. Figure 10: Aerosol emissions at 20.0 metres over Europe 215
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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
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Cycle Date Model change and impact
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1.5km On-demand model Figure 8: 1.5
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3.1 Belgium 59
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• A prognostic mass-flux scheme f
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Perspectives The integrated package
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3.2 Croatia 65
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New computer Core of the new comput
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3.3 Czech Republic 69
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LAM efforts at Estonian Meteorologi
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grid is 186x170 points in horizonta
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McDonald, A., and J. E. Haugen, 199
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Operational NWP Activities at the F
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Model Forecast model Limited area g
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3.7 France 87
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Fig.1. The ALADIN-France domain, wi
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Towards AROME, A first try of a Rap
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Status Report of the Deutscher Wett
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In August 2006 production with the
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3.9 Hungary 97
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• LBC coupling at every 3 hours O
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IFS as driving model for ALADIN. Th
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3.10 Ireland 103
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Filtering: Fourth order implicit ho
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The next chart shows wind arrows at
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Italian Meteorological Service Stat
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Fig.3 Integration domain for LM- EU
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3.12 Netherlands 113
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esults with fixed entrainment and d
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simulation. In order to allow a goo
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layer for three contrasting nights
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21 UTC). The severe thunderstorm fo
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Limited Area Modelling Activities a
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(a) Figure 2 ALADIN/Portugal geogra
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een locally implemented as an optim
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LAM ACTIVITIES IN ROMANIA Cornel SO
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Fig.3 HRM domain, 78 cumulated prec
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- Experiments : variation of the fr
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NWP activities at Slovak Hydrometeo
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Operational suite upgrades • 23/0
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3.16 Slovenia 139
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First experiments with new physical
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• resolution of meteorological fi
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NWP activities in INM Bartolomé Or
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1 System definition • Creation of
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MSLP June-August 2006 Geopotential
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NATIONAL STATUS REPORT on Operation
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Model input The observations used f
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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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Page 183 and 184: COSMO: Overview and Strategy on Dat
Page 185 and 186: Meteorology in Hamburg (MPI-M). The
Page 187 and 188: temperature forecasts, this had a s
Page 189 and 190: 5.2 D. Leuenberger et al.: The Late
Page 191 and 192: scaling factor α and of the latent
Page 193 and 194: a) b) RAD 1 2 3 4 5 6 7 8 9 10 det
Page 195 and 196: 5.3 C. Fischer and A. Horanyi: Alad
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Page 201 and 202: In parallel, a direct radar observa
Page 203 and 204: ►Algorithms: • FGAT (with Hunga
Page 205 and 206: Data assimilation activities in LAC
Page 207 and 208: Fig.3 RMSE difference (WDEF-NAM2).
Page 209 and 210: 6 Scientific presentations on physi
Page 211 and 212: Physics improvements in the NAE mod
Page 213 and 214: The top panel in figure 3 shows tha
Page 215: The Murk aerosol is based on the ur
Page 219 and 220: Figure 12: SOx emissions in 1990 an
Page 221 and 222: Buncefield oil depot fire Figure 15
Page 223 and 224: 6.2 P. Clark et al.: The Convective
Page 225 and 226: y the model (e.g. streaks of gradua
Page 227 and 228: the Met Office Large Eddy Model (LE
Page 229 and 230: Figure 4 Domains used in high resol
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Page 233 and 234: Figure 10 Surface precipitation rat
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Page 257 and 258: TKE and the integral buoyancy of th
Page 259 and 260: 7 Scientific presentations on predi
Page 261 and 262: LAMEPS Development of ALADIN-LACE Y
Page 263 and 264: The more iterations performed, the
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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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