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Status of the Support Activities and WG 6 Activities

Status of the Support Activities and WG 6 Activities. COSMO Working Group 6: Reference Version and Implementation Working Group Coordinator: Ulrich Schättler. Support Activities Status of COSMO-Software Status of the Web Model Documentation Working Group Activities Grib2 Coding Issues

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Status of the Support Activities and WG 6 Activities

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  1. Status of the Support Activitiesand WG 6 Activities COSMO Working Group 6: Reference Version and Implementation Working Group Coordinator: Ulrich Schättler

  2. Support Activities Status of COSMO-Software Status of the Web Model Documentation Working Group Activities Grib2 Coding Issues Source Code Management SRNWP Interoperability Programme Contents COSMO General Meeting 2010

  3. Status of COSMO Software

  4. COSMO-Model versions Status of COSMO Software COSMO General Meeting 2010

  5. Dynamics: Corrected use of cloud ice tendency from Tiedtke scheme in RK Option for generalized Asselin-Filter Option for preventing cold pools in steep valleys (ltadv_limiter) in combination with theta advection (itheta_adv=2) only Option for selecting bottom boundary condition for vertical velocity Option for reference atmosphere with constant Brunt-Väisälä frequency for idealized cases only COSMO-Model 4.10 / 4.11 (released) COSMO General Meeting 2010

  6. Physics New sea-ice scheme New multi-layer snow model Changes to TKE-scheme implicit vertical diffusion; 3D and horizontal correction of windshear production; separate horizontal shear mode; wake turbulence due to SSO; stability corrections for turbulent length scale Radiation New optional aerosol climatology New external parameters for aerosol and surface emissivity Soil-Model New optional external parameter for minimum stomata resistance of plants COSMO-Model 4.10 / 4.11 (released) COSMO General Meeting 2010

  7. Dynamics Modifications to bottom boundary condition Modifications to horizontal diffusion: Removed the 2D mask field; diffusion factors for interior and boundary zone Treat diffusion of pressure now separate from temperature New routines to compute potential vorticity for output Physics Modifications to sea-ice scheme and multi-layer snow model Latent Heat Nudging Reintroduction of spatial quality function Generalisation of the use of radar observation input frequency More robust check in input of radar observations COSMO-Model 4.12 (tested) COSMO General Meeting 2010

  8. 4.13 (31.05.10) Technical modifications to prepare for a new source code control system (SVN) Introduction of an info-module which gives information about the binary, compiler options, etc, for every model run Reconstruction of the Makefile: put Fopts, ObjFiles, ObjDependencies to separate files and keep extra files for every compiler in new directory LOCAL 4.14 (14.06.10) Microphysics: Take density correction of terminal fall velocity into account. This leads to an increase of sedimentation velocity in the atmosphere COSMO-Model 4.13 (released) / 4.14 (in VCS) COSMO General Meeting 2010

  9. INT2LM versions Status of COSMO Software COSMO General Meeting 2010

  10. Option lum2lm to process data from the Unified Model (UKMO) Option to interpolate t_ice and h_ice from GME grid (only) Option to compute FLake cold start variables Decomposition independent computation of interpolation weights for reproducibility Note: There still is a reproducibility problem for the „match“ interpolation of surface / soil variables for isolated land- or sea-points INT2LM 1.10 (released) COSMO General Meeting 2010

  11. 1.11 (23.04.10) Technical modifications to prepare for a new source code control system (SVN) Introduction of an info-module which gives information about the binary, compiler options, etc, for every model run Reconstruction of the Makefile: put Fopts, ObjFiles, ObjDependencies to separate files and keep extra files for every compiler in new directory LOCAL 1.12 (14.06.10) Possibility to switch the reference atmosphere in the option llm2lm Vectorization of subroutine moist-split INT2LM 1.11 / 1.12 (in VCS at DWD) COSMO General Meeting 2010

  12. Plans for the Near Future COSMO General Meeting 2010

  13. Status of COSMO Web

  14. The site now provides a news feed for its updates When the traditional “updates log” is changed, subscribers get a notice of the new items

  15. New pages have been created for exchanging observation archives www.cosmo-model.org/srnwp/content both the browsing and the downloading procedure is web based COSMO General Meeting 2010

  16. People interested for changes in PP taskLists can get informed fast; When a PP page gets edited, a mail is send to the new cosmo-news mailist COSMO General Meeting 2010

  17. The observation-archive browsing/downloading/uploading mechanism was extended to main site. You can browse the site’s directories looking for non-web-page documents, going up and down the folders tree www.cosmo-model.org/docView COSMO General Meeting 2010

  18. New forum software installed Possibilities for personal pages, discussions and distributed documentation www.cosmo-model.org/forum COSMO General Meeting 2010

  19. Although some contents are still too old, the site has seen some major changes New features have to be communicated to the Users We have to see how we can use the browsing/uploading/downloading and the Forum-pages And (after all): The old contents have to be updated or removed Conclusions COSMO General Meeting 2010

  20. Model Documentation

  21. Model Documentation Dynamics and Numerics, Physics, Assimilation: no updates have been done (at least none have been reported) but: work in progress for Runge-Kutta Documentation User Guides for INT2LM and the COSMO-Model have been updated to the latest versions in paper form. The web page tool has not been updated. Documentation COSMO General Meeting 2010

  22. COSMO Newsletter No. 10 has been published in January 2010 with (only) 10 contributions But we had 6 new Technical Reports: TR 14 - 19 COSMO Priority Project "Further Developments of the Runge-Kutta Time Integration Scheme" (RK); Final Report COSMO Priority Project "Tackle Deficiencies in Quantitative Precipitation Forecast" (QPF); Final Report COSMO Priority Project "INTERP"; Final Report Description of some convective indices, implemented in the COSMO model Statistical Analysis of high-resolution COSMO Ensemble forecasts, in view of Data Assimilation Seven years of activity in the field of mesoscale ensemble forecasting by the COSMO-LEPS system: main achievements and open challenges Documentation COSMO General Meeting 2010

  23. Other WG 6 Activities • Grib 2 Coding Issues • Source Code Management

  24. Some COSMO centres have now decided to use grib_api from ECMWF as standard Grib library (DWD, MeteoSwiss, ARPA-SIM, …) grib_api is already implemented into FieldExtra and work is in progress to implement it into INT2LM. Implementation into the COSMO-Model will follow. Some issues have to be discussed (still ongoing): Coding the vertical coordinate / grid of the COSMO-Model What about the Reference Atmosphere Coordination of usage of Grib2 Grib2 Coding Issues COSMO General Meeting 2010

  25. We code all these parameters as „vertical coordinate parameters“ Coding the Vertical Coordinate COSMO General Meeting 2010

  26. But only the list of vertical coordinate parameters should be there Moreover, Grib only knows about „pairs of vertical coordinate parameters“ in combination with the surface pressure: pressure = ak + bk * surface pressure (typeOfLevel = 119) or height = ak + bk * surface height (typeOfLevel = 118; new in Grib2) After the discussion we had in the last months, we proposed a new vertical coordinate type: typeOfLevel = 150 Do not specify vertical coordinate parameters together with a 2D field but directly specify a 3D field (as a Grib message) with the height of all grid points The list of vertical coordinate parameters can be used to specify additional information about the vertical grid: NLAY: number of vertical layers (Note: # levels = # layers + 1) NGRID: version number of vertical grid Coding the Vertical Coordinate COSMO General Meeting 2010

  27. But what to do with the parameters for the reference atmospheres? These parameters do not belong to the vertical grid and they are only necessary to interpret the field „pressure deviation from reference pressure“ (because they are needed to compute the reference pressure) Using typeOfLevel = 150, we could still code them in the list of vertical coordinate parameters, because this is more or less „local use“ then. But it is not nice Are there different possibilities? Section 2, for example? Coding the Vertical Coordinate COSMO General Meeting 2010

  28. COSMO-Standard for Source Code Development Try to define clear rules for the development (design, coding rules, documentation, etc.) And also give detailed rules for updating the Reference Version This has been demanded several times Now that the community is growing and other communities are also working with the COSMO-Model, this is inevitable Discussion is going on and we will deliver a „Standard“ until the next COSMO User Seminar Source Code Management COSMO General Meeting 2010

  29. The SRNWP Interoperability Programme

  30. To support future collaborative effort in European Limited Area Modelling by: Defining a standard output format Providing software tools (adaptors) to convert LAM output to the standard format Enabling European LAMs to run from appropriate alternative model fields To display or use in NMHS post-processing system To provide operational backup Idea of Interoperability COSMO General Meeting 2010

  31. Plans for the Adaptor For Parameter List 1: ps, psml, t2m, td2m, … GME UM ARPEGE IFS Fieldextra Read (Write) Grib 2 and transform to COSMO-Model grid: only 2D fields UM_local ALADIN HIRLAM COSMO COSMO General Meeting 2010

  32. Plans for the Adaptor For Parameter List 2: u, v, w, t, p, qx, … to be done status unclear GME ARPEGE GFS? GSM? INT2LM Read (Write) Grib 2 and transform to COSMO-Model grid: 2D fields, full atmosphere, soil parameters ALADIN HIRLAM COSMO COSMO General Meeting 2010

  33. lum2lm (Grib1): Temperature (lowest COSMO Level) from GME IFS UM Aemet UM DWD COSMO General Meeting 2010

  34. lum2lm (Grib1): PP from reference pressure (lowest level) from GME IFS UM Aemet UM DWD COSMO General Meeting 2010

  35. lum2lm (Grib1): Wind speed (lowest level) from GME IFS UM Aemet UM DWD COSMO General Meeting 2010

  36. In December 2009, the “Interoperability Team” met in Reading for discussing last years work and do some planing for 2010. The first 2 deliverables were finally agreed: The Standard Format shall be the native grid and native parameters Documentation supplied with the standard format should be the minimum required Some Grib 2 Issues were discussed: There is a problem with coding the vertical coordinate / vertical grid of COSMO in Grib 2 (see tomorrows session on Postprocessing) Workshop in Reading COSMO General Meeting 2010

  37. Vertical coordinate / vertical grid of the COSMO-Model A COSMO-internal discussion about coding the vertical grid in Grib2 has been initiated early 2010 For the Gal-Chen height based hybrid coordinate it is possible to code the grid with typeOfLevel=118, the corresponding orography (as a 2D field) and vertical coordinate parameters This is NOT possible for e.g. the SLEVE coordinate The COSMO discussion led to a proposal to the WMO Commission for Basic Systems (IPET-DRC: Inter-Programme Expert Team on Data Representation and Codes). A new vertical coordinate type is proposed, where no vertical coordinate parameters together with a 2D field are given, but a full 3D field with the heights of every grid point is specified. The proposal has been discussed also with Enrico Fucile (ECMWF) Work in 2010 COSMO General Meeting 2010

  38. grib_api grib_api has been established at some COSMO centres to be the official Grib(2) library (DWD, MeteoSwiss, ARPA-SIM Bologna) Work is in progress to improve performance on NEC machines (together with NEC, MeteoFrance and ECMWF) It has been implemented in FieldExtra for reading and writing. FieldExtra therefore can now produce the parameters of the standard output format list directly Work is in progress, to implement it into INT2LM Work in 2010 COSMO General Meeting 2010

  39. New Grib 2 test data set and documentation A new Grib2 test data set, which has been produced by FieldExtra, has been provided. This still has the old (Grib1-style) coding of the vertical coordinate No Grib2 test data has been provided with typeOfLevel=118, because this might not be the default case any more (if proposal is accepted) No surface test data (according to the guidelines from the ET on Surface Aspects) has been provided up to now The minimum required level documentation has not been updated according to the plans from last workshop describe native grids describe fields in the standard output list: what field is it, what does it represent in the generating model Work in 2010 COSMO General Meeting 2010

  40. COSMO General Meeting 2010

  41. COSMO General Meeting 2010

  42. Thank you very much for your attention COSMO General Meeting 2010

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