1. Summary of WG6 activities
Massimo Milelli
&
all the group members
13/09/2017 – 19th COSMO General Meeting, Jerusalem

2. Outline Reporting NWP Test Suite PT EDP2 New PP Web updates
New Italian configuration
13/09/2017 – 19th COSMO General Meeting, Jerusalem

3. Outline Reporting NWP Test Suite PT EDP2 New PP Web updates
New Italian configuration
13/09/2017 – 19th COSMO General Meeting, Jerusalem

4. Reporting Newsletter: July 2017 (5 contributions) Technical Reports:
A Turbulence Kinetic Energy - Scalar Variance Turbulence Parameterization Scheme, D. Mironov and E. Machulskaya (TR30)
CALMO - Progress Report, P. Khain, I. Carmona, A. Voudouri, E. Avgoustoglou, J.-M. Bettems, F. Grazzini and P. Kaufmann (TR31)
Calibration of COSMO Model, Priority Project CALMO Final report, A. Voudouri, P. Khain, I. Carmona, E. Avgoustoglou, J.M. Bettems, F. Grazzini, O. Bellprat, P. Kaufmann and E. Bucchignani (TR32)
V.A.S.T. (Versus Additional Statistical Techniques) User Manual (v2.0), N. Vela (TR33)
Common plot activity
TRs from PP CORSO, PP COTEKINO and PP KENDA are pending
13/09/2017 – 19th COSMO General Meeting, Jerusalem

5. Outline Reporting NWP Test Suite PT EDP2 New PP Web updates
New Italian configuration
13/09/2017 – 19th COSMO General Meeting, Jerusalem

6. NWP Test Suite Forecast mode vs Hindcast mode MEC+FF vs VERSUS
The discussion started via some time ago, then during the STC meeting on Monday and it continued during the joint WG6/WG5 meeting.
A conclusion is not yet reached, there will be a follow-up during SMC meeting on Friday morning.
13/09/2017 – 19th COSMO General Meeting, Jerusalem

7. Outline Reporting NWP Test Suite PT EDP2 New PP Web updates
New Italian configuration
13/09/2017 – 19th COSMO General Meeting, Jerusalem

8. PT Evaluation of the Dycore Parallel Phase (EDP2)
Task duration : 01/2017 – 08/2017
Two implementations of the RK dynamical core coexist in COSMO:
Fortran
C++ based on STELLA Library (required to run on GPU)
C++ version will soon be in the official version (with 5.05)
STELLA dycore is required to run the model on GPU, faster on CPU also
Maintenance effort 0.5 FTE/year
13/09/2017 – 19th COSMO General Meeting, Jerusalem

9. Developer experience (using STELLA)
C++ Dycore Source Code Maintainer (P. Spörri, MCH) : nice and efficient to write single source performance portable HPC code
C++ Dycore Users: Experiences at DWD: very different than higher programming language (like Fortran, C++, Python, ...), need permanent support for development. => Seen as a large obstacle for model development
Experience at IMGW (port of EULAG with GridTools): while this is early stage, progress is good and currently there are no major obstacles to port the Fortran code to C++.
=> Divergent opinions !
13/09/2017 – 19th COSMO General Meeting, Jerusalem

10. Developer experience (using STELLA)
Recommendation
Extend the parallel phase of maintaining both the C++ and Fortran implementations
Evaluate again after a period of at least two years
C++ Dycore Source Code Maintainer (P. Spörri, MCH) : nice and efficient to write single source performance portable HPC code
C++ Dycore Users: Experiences at DWD: very different than higher programming language (like Fortran, C++, Python, ...), need permanent support for development. => Seen as a large obstacle for model development
Experience at IMGW (port of EULAG with GridTools): while this is early stage, progress is good and currently there are no major obstacles to port the Fortran code to C++.
=> Divergent opinions !
13/09/2017 – 19th COSMO General Meeting, Jerusalem

11. Outline Reporting NWP Test Suite PT EDP2 New PP Web updates
New Italian configuration
13/09/2017 – 19th COSMO General Meeting, Jerusalem

12. PP CEL-ACCEL
There is a new WG6 PP about COSMO-EULAG on accelerators (PP CEL- ACCEL) by Z. Piotrowski.
The aim is to implement consistent anelastic/compressible COSMO-EULAG dynamical core (DC) within the C++ dynamical core framework of COSMO (the main deliverable being the high-resolution forecasting system ready for pre-operational testing on modern supercomputing architectures, viz., GPU and manycore CPUs).
The duration is 2.5y ( ) and the participants are IMGW and MCH.
13/09/2017 – 19th COSMO General Meeting, Jerusalem

13. Outline Reporting NWP Test Suite PT EDP2 New PP Web updates
New Italian configuration
13/09/2017 – 19th COSMO General Meeting, Jerusalem

14. Main web updates after the meeting in March
Added filters to publication list (by year and by WG topic)
Newly organised Software page
New FTE summary tables for PPs and PTs
In the main home menu (left side), under “Documentation/Release Notes” now the files misc.global are available (better visibility)
PP pages and Events page updated
PT pages added in the main home menu (left side)
SMC repository added to the “User Support/Repository” page
Info about licensees in “Operational” pages
13/09/2017 – 19th COSMO General Meeting, Jerusalem

15. Still to be done… There is an idea to include COSMO-LEPS maps
Documentation of TERRA to be included (public wiki) but DWD internal discussion is still needed
Need to update some “Operational” pages
Comprehensive grib2 page
Updating FAQ page
13/09/2017 – 19th COSMO General Meeting, Jerusalem

16. Outline Reporting NWP Test Suite PT EDP2 New PP Web updates
New Italian configuration
13/09/2017 – 19th COSMO General Meeting, Jerusalem

17. 13/09/2017 – 19th COSMO General Meeting, Jerusalem

18. Thanks for your attention and for your work !
13/09/2017 – 19th COSMO General Meeting, Jerusalem