1. 2D-model in arp/ifs framework Same code as the complete 3D-model Few modifications driven by the LMAP key Setup (geometry) SL scheme Developped by the NH Aladin team Also some utilisations within Arome (Squall line)

2. Running the 2D-model (3 steps) Step 1 : to prepare an Aladin/Arome file –ACADFA facilities- Step 2 : run the model Step 3 : Post-processing –FLUX facilities-

3. ACADFA (many versions) ACADFA Runsrc finit Makefile Source files.exe namelist Output file

4. The different steps of ACADFA Set up internal constants Read namelist Set-up of namelist-deductible variables Temp from brunt-Vaissala frequency Pressure and level coefficients from dZ,Temp, Ref pressure Prepare output file (frame of the fa file) Write grid-point data Compute orography (from the def of the hill) Write constant fields Write 2D spectral data Compute surf pressure from interpolation of ref pressure over the hill Write 3D spectral data Write other fields with constant values in general

5. some namelist variables of Acadfa IDGUX (C+I) & IDGL (C+I+E), IFLEV INSMAX= meridional truncation ZDELY, ZDELZ LMPHYS, LREASUR LNHDYN LMAP IPOSITION (position of Hill), ZWIDTH, ZHEIGHT ZT00, ZP00, ZU00, …

6. Run a 2D case Nothing special providing the good file except : Lmap=F, RCORI_ACAD (coriolis for academic) in nemgeo Tune or not the sponge (mountain waves absorbing layer at the top) Nproma=-ndgl (namdim)

7. Flux facilities (post-processing for academic cases) An ensemble of sources able to read fa 2d outputs and to make ascii files Then can be plotted with usual graphics tools

8. Ex in Arome 2D squall line To test Microphysics and 1D TKE in Arome Some tuning of Acadfa to put a prescribed profile (T, Q, U) coming from an observed RS + horizontal homogeneity. Some prescribed values during the run (a cooling during a limited period of time and on a bounded layer, some idealized values of surface fluxes), still in the code under key LSQUALL key (NAMMNH)

9. Theta-theta0 Relative wind Cloud Vertical velocity Sum hydroTKE humidity 2D Academic Squall Line TKE+microphysics (Yann Seity, feb 2004)

10. 2D Academic Squall Line TKE+microphysics Yann Seity feb 2004 AROME(7.5s)(+8h) AROME (30s)

11. Concluding remarks A tool developped by dynamicians But should interest also the physicians to test for ex the importance of advection for some processes or some phys-dyn interactions in a simplified framework