ALADIN-HIRLAM workshop on code maintenance and data assimilation

A very preliminary version of the programme is proposed (please note that not all the presentations are not confirmed yet by the relevant speakers). The first two days will be basically devoted to code and maintenance aspects and then the data assimilation issues will be put on the table (from technical to scientific questions), therefore one could just participate partially to the workshop. A block reservation to a hotel nearby (Hotel Papillon, around 30 euros per night) has been made. More practical details will be at the very beginning of September. For any comments on the draft programme or any question, please contact : Andras Horanyi .

Provisional draft programme

Code maintenance, merging issues: 14-15 November (2 days)

Data assimilation practical issues: 16-18 November (3 days)

Monday, 14th of November

Morning:
Ryad El Khatib: General overview on the code architecture
Karim Yessad: General overview of the configurations
Gabor Radnoti: Spectral transforms
Karim Yessad: Eulerian and semi-Lagrangian data flow: direct, TL and AD code, trajectory handling

Afternoon:
Ryad El Khatib: Coding rules
Ryad El Khatib: Source code management: generalities and production of binaries
Martin Janousek: Source code management: more details and examples
Filip Vana: Horizontal diffusion (SLHD)
Gabor Radnoti: Parallel environment

Tuesday, 15th of November

Morning:
Karim Yessad: Semi-implicit scheme and PC schmes (LPC-FULL), data flow: direct, TL and AD code
Martina Tudor: Physics on the data flow
Martin Janousek or Gabor Radnoti: Coupling issues in ALADIN
Laszlo Kullmann: Local installation of ALADIN export version (an example)

Afternoon:
Laszlo Kullmann: Local scripts at HMS for running ALADIN
Bent Hansen Sass: The HIRLAM physics: porting to ALADIN
Claude Fischer: Phasing, merging (example of HIRLAM physics)
Eric Sevault: Description of the OLIVE system
Debriefing on the code maintenance issues (plenary discussion)

Wednesday, 16th of November

Morning:
Claude Fischer: Code description: variational data assimilation
Gerald Desroziers: ARPEGE 4D-VAR multi-incremental (scientific + technical)
Sandor Kertesz: ODB

Afternoon:
Gerald Desroziers: Minimizers for variational data assimilation (M1QN3 vs. CONGRAD)
Loik Berre: Computation of background errors for ALADIN, Part I.: Technicalities
Roger Randriamampianina: Observation pre-processing: tools

Thursday, 17th of November

Morning:
Claude Fischer: 3d-var experimentation in Toulouse
Loik Berre: Computation of background errors for ALADIN, Part II.: scientific overview
Gergely Boloni: Overview of 3d-var installation in Budapest
Roger Randriamampianina: Impact studies with ALADIN
Ludovic Auger: Varpack

Afternoon:
Gergely Boloni: How to run ALADIN 3d-var in Budapest?
Nils Gustafsson: HIRLAM state of the art on data assimilation
2 more HIRLAM presentations: data assimilation science in HIRLAM

Friday, 18th of November

Morning:
Nils Gustafsson: Data assimilation plans for HIRLAM
Claude Fischer: Data assimilation plans for ALADIN
Nils Gustafsson, Claude Fischer: Common research plan on data assimilation for ALADIN and HIRLAM
Discussions on the further planning and concrete steps