1. Status of the COSMO-Software and Documentation WG 6: Reference Version and Implementation WG Coordinator: Ulrich Schättler

2. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 2 Contents Source Code Administration: Developments in 2008/09 DWD plans for the near future Model Documentation COSMO Newsletter COSMO Technical Reports

3. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 3 Source Code Administration Starting point last autumn: –COSMO-Model 4.2 and INT2LM 1.7officially distributed –COSMO-Model 4.5 and INT2LM 1.8 as development versions Plans for the year 2008/09: –Consolidate last development versions –Include COSMO-ART –Include 2-moment microphysics –Prepare the COSMO-Model for an easy use of test-cases –Prepare the COSMO-Model for OASIS coupling –Include optimizations by NEC and IBM –Hybrid parallelization

4. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 4 Source Code Administration INT2LM 1.9 (03.09.09) –Implementation of new reference atmosphere –Modifications in the initialization of perturbed pressure –Reading additional external parameters 12 monthly ratios of NDVI (DWD, Grib 1 only) 12 monthly values of plcov, lai, z0 (CLM in NetCDF only) 12 monthly values of aerosol types (DWD, Grib1 only) Minimum stomata resistance of plants Thermal radiative surface emissivity –Modifications for the vertical interpolation in case of llm2lm –Alternative interpolation of soil humidity –Alternative treatment of IFS humidity –Additional options for itype_w_so_rel –Bug fixes and technical adaptations

5. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 5 Source Code Administration COSMO-Model 4.6/4.7: (12.12.08) –Correction updates and bug fixes Nudging: observation processing in NetCDF Dynamics: remove analytical computation of reference pressure, which must be done simultaneously in INT2LM Soil Model: split IF statements with llandmask and m_styp (which is only defined, if llandmask=.TRUE. ) Initialize ldiabf_satad=.FALSE. for Leapfrog

6. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 6 Source Code Administration COSMO-Model 4.8: (13.02.09) –New reference atmosphere –Implemented stable integration of the Coriolis terms by calculating their tendencies in every RK substep (optional) –Included (optional) computation of „old“ 2m temperature; can be chosen by itype_diag_t2m –Splitted computation of dynamical and convective gusts (vmax_10m still is the sum of both) –Included several options for computing dynamical gusts with itype_diag_gusts –Technical adaptations and bug fixes –Call to SR global_values only, if number of processors > 1

7. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 7 Source Code Administration COSMO-Model 4.9: (15.07.09) –Implementation of COSMO-ART This is an initial release which most probably needs further testing Introduced ifdef s for a clean splitting of this component (-DCOSMOART, -DPOLLEN ); please note: lmorg.F90  lmorg.f90 ) Source Code is not distributed with the COSMO-Software, but only by KIT (the Karlsruhe Institute of Technology) –Changes in the dynamics More accurate (and expensive) discretization of metric terms for the Runge-Kutta scheme Implemented option for using potential temperature as advected variable Introduced itype_lbc_qrsg to control the treatment of humidity variables at the boundary zones –Technical adaptations and bug fixes

8. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 8 Some routines have been (partly) reorganized for better vectorization (e.g. synthetic satellite images, radiation on a coarser grid) Implemented 3D versions for diffusion and advection operators. This had negative effects on the IBM (destruction of cache re-use), therefore it is implemented with an ifdef NECSX (default: FALSE) In some routines, a loop collapsing has been implemented „by hand“ (using above ifdef ) Timings for a 12 hour COSMO-DE forecast (should take about 11 minutes on as few processors as possible) NEC SX-9 1  12 PE IBM pwr6 16  16 PE Time to Optimization 4.214951.5720.5 4.42021.8659.13 days 4.81024.2678.53 weeks 4.9634.2679.83 months Source Code Administration Vector Optimizations: The COSMO-Model still is a performance portable model!

9. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 9 INT2LMCOSMO-Model New Reference Atmosphere done COSMO-ART, Pollen Interpolation of Pollen still missing done New External Parametersdone Use of new parameters still missing Optimizations by NEC, IBM – NEC: nearly done IBM: still missing 2-Moment Microphysics –  Easy Use of Test Cases –  OASIS coupling –  Hybrid Parallelization  Summary of Software Status Source Code Administration

10. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 10 Source Code Administration Actions in the next weeks –Testing of the new versions of INT2LM and the COSMO-Model; additional work, if necessary –Distribution of the new versions to all partners –Preparation of new external parameter data sets with additional fields –Every COSMO partner updates its operational implementation –Every COSMO partner takes care of the update of the corresponding COSMO web pages!

11. DWD Plans for the near future

12. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 12 COSMO-EU Grid spacing: 7 km Layers: 40 Forecast range: 78 h at 00 and 12 UTC 48 h at 06 and 18 UTC 1 grid element: 49 km 2 COSMO-DE Grid spacing: 2.8 km Layers: 50 Forecast range: 21 h at 00, 03, 06, 09, 12, 15, 18, 21 UTC 1 grid element: 8 km 2 Global model GME Grid spacing: 40 km Layers: 40 Forecast range: 174 h at 00 and 12 UTC 48 h at 06 and 18 UTC 1 grid element: 1384 km 2 Model System at DWD

13. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 13 Grid spacing reduced from 40 to 30 km. Number of layers increased from 40 to 60. Number of gridpoints increased from 14.7 to 39.3 Mill. Time step decreased from 133.33 s to 100.00 s. Cost of model increased by a factor of more than four. Uppermost model layer moved from 10 hPa to 5 hPa. Prognostic precipitation without advection of rain (q r ) and snow (q s ). Tiedtke convection scheme replaced by Bechtold scheme. Variational soil moisture assimilation scheme (SMA). GME 30 km / 60 Levels

14. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 14 30 km Max: 2796 m 40 km Max: 2551 m

15. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 15 GME L40 GME L60 ECMWF L91 ECMWF L60

16. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 16 GME data volume to be transferred will increase by a factor of at least 2.7 = (60/40) *(256/192) 2. Including rain (q r ) and snow (q s ) in the initial and lateral boundary data will increase the factor to about 3.3. This might imply an increase of the Internet connection bandwidth at the NMHS receiving GME data! The improved quality of GME will lead to an improved quality of the COSMO-Model forecasts, especially for near surface weather conditions. Impact on Users of GME Data

17. Model Documentation COSMO Newsletter COSMO Technical Reports

18. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 18 Model Documentation Dynamics and Numerics, Physics, Assimilation: –no updates have been done (at least none have been reported) User Guides for INT2LM, COSMO-Model: –Updates for the new / changed Namelist variables Documenting the procedures for INT2LM has started because of the Interoperability Programme

19. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 19 COSMO Newsletter COSMO Newsletter No. 9 has been published in December 2008

20. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 20 COSMO Technical Report TR No. 12: Adriano Raspanti: Final Report on Priority Project VERSUS (Verification System Unified Survey) TR No. 13: Chiara Marsigli: Final Report on Priority Project SREPS (Short Range Ensemble Prediction System)

21. 07.-11.09.2009 11th COSMO General Meeting - Offenbach, Germany 21 THE END Thank you for your Attention