Status of the COSMO-Software and Documentation COSMO Working Group 6: Reference Version and Implementation Working Group Coordinator: Ulrich Schättler

Contents Developments in 2009/2010 Plans for the Near Future Model Documentation COSMO Newsletter COSMO Technical Reports 06.09.2010 COSMO General Meeting 2010

Developments in 2009 / 2010 COSMO-Model versions Version Implementation Date Status 4.9 15.07.09 released 4.10 11.09.09 tested 4.11 27.11.09 4.12 13.04.10 4.13 31.05.10 4.14 14.06.10 in VCS (at DWD) 06.09.2010 COSMO General Meeting 2010

COSMO-Model 4.10 / 4.11 (released) 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 06.09.2010 COSMO General Meeting 2010

COSMO-Model 4.10 / 4.11 (released) 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 06.09.2010 COSMO General Meeting 2010

COSMO-Model 4.12 (tested) 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 06.09.2010 COSMO General Meeting 2010

COSMO-Model 4.13 (released) / 4.14 (in VCS) 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 06.09.2010 COSMO General Meeting 2010

Developments in 2009 / 2010 INT2LM versions Version Implementation Date Status 1.9 03.03.09 released 1.10 16.12.09 1.11 23.04.10 in VCS (at DWD) 1.12 14.06.10 06.09.2010 COSMO General Meeting 2010

INT2LM 1.10 (released) 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 06.09.2010 COSMO General Meeting 2010

INT2LM 1.11 / 1.12 (in VCS at DWD) 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 06.09.2010 COSMO General Meeting 2010

Plans for the Near Future Technical Work Status Reconstruction of mpe_io Prototype available Implementation of ifdefs for external libraries not started Choice of output format for every Namelist group Implementation of grib_api started for INT2LM New Physics Interface Prototype for Microphysics Semi-Technical COSMO-ART for Runge-Kutta under development 2-moment Microphysics Generic treatment of idealized cases Implementation of generic tracer variables needs coordination Tile / Mosaic approach prototype available; definition of fluxes? Full 3D strang splitting implemented at MCH; should be discussed in WG2 OASIS prototype for OASIS 3.0; new work for 4.0 Urban Module technical difficulties 06.09.2010 COSMO General Meeting 2010

Plans for the Near Future Update COSMO-Model with CLM (cosmo_100614_4.14_clm_1) Update INT2LM with CLM (int2lm_091216_clm_4) New release of COSMO-Model and INT2LM in autumn including …? Depending on the outcome of the discussion about Source Code Management 06.09.2010 COSMO General Meeting 2010

Documentation 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. 06.09.2010 COSMO General Meeting 2010

Documentation 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 06.09.2010 COSMO General Meeting 2010

Thank you very much for your attention 06.09.2010 COSMO General Meeting 2010