Bucharest 2006 J. Steppeler (DWD) WG2 activities 2006 Bucharest 2006 J. Steppeler (DWD)

WG2: List of Work Packages 2006 2. 1Priority WG2: List of Work Packages 2006 2.1Priority Further development of Runge Kutta 2.1.1 Looking at pressure bias (Foerstner , Torrisi, possibly CIRA) OK 2.1.2 Continue RK case studies ( De Morsier, Torrisi, possibly CIRA )OK 2.1.3 Conservation (Baldauf ) OK/2 2.1.4 Advection of moisture quantities in conservation form (Foerstner) OK 2.1.5 Investigation of convergence (Baldauf) NOT DONE 2.1.6 Deep valleys (Bitzer, Foerstner, Reinhard) OK 2.1.7 Different filter options for orography (Foerstner) OK 2.1.8 3rd order in the vertical for Runge Kutta scheme OK/2 2.1.9 Physics coupling scheme : Report of possibilities in Sept 2006 Not Done 2.1.10 Testing of alternative fast wave scheme (Gassmann) OK De Morsier .1, Foerstner .5, Torrisi .1, Baldauf .2,

2. 2 Priority. Z-coordinate (see next slide) 2. 3 2.2 Priority Z-coordinate (see next slide) 2.3 Implicit integration: 3-d pilot study (Thomas, Schättler, Steppeler) Publication in print, Visit Thomas planned 2.4 CP (Charney Phillips vertical staggering) version of LM with theta and pi (Exner function) as prognostic fields: (Herzog, Gassmann) OK 2.5 Further development of radiative upper boundary condition: real cases (Herzog, Gassmann, De Morsier) OK 2.6 LM User Seminar / Advanced Numerics Seminar (Steppeler, Baldauf) OK

LM_Z OK, untested Not done, no staff Only two Version 1.4 done, overachieved not done OK, not complete ? OK OK, preliminary test Not done OK, in print MWR First meeting OK Not done, for next year

Conclusions administrative This may be considered to be most important, but it is really not very meaningful. LM_RK: Rome: .1; Germany .6; Switzerland : Not done .1 LM_Z: Rome .2; Bologna .2; Greece .3; Poland .5; Germany .3; Switzerland .1; Switzerland Not done .1 The PDEs reflect in no way the importance of the work to the success of the project.

Verbesserte Vertikaladvektion für dynamische Var. u, v, w, T, p‘ analytic sol. implicit 2. order implicit 3. order implicit 4. order C=1.5 80 timesteps Idealized 1D advection test C=2.5 48 timesteps

case study ‚25.06.2005, 00 UTC‘ Improved vertical advektion for dynamic var. u, v, w, T, p‘ total precipitation sum after 18 h with vertical advection 2. order difference total precpitation sum after 18 h ‚vertical advection 3. order – 2. order‘

cold pool – problem in narrow valleys is essentially induced by pressure gradient term T (°C) starting point after 1 h after 1 h modified version: pressure gradient on z-levels, if |metric term| > |terrain follow. term| J. Förstner, T. Reinhardt

All PDE delivered except Task 7 of LM_Z (.1 PDE) LM_RK: Conclusions, Formal: PDEs delivered OK, but some WP not exactly to plan, but often useful some much above plan All PDE delivered except Task 7 of LM_Z (.1 PDE) LM_RK: LM_Z: Main goal achieved, but not all work done, very convincing results of LM_Z 1.4 Report in print MWR Implicit integration: Guest scientist Thomas CP OK Radiative upper boundary condition: OK LM User Seminar / Advanced Numerics Seminar OK