WG2 activities 2006

Bucharest 2006

J. Steppeler (DWD)

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 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)OK2.5 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

OK, untestedNot done, no staff

Only two

Version 1.4 done, overachieved

not done

?

Not done, for next year

OKOK, preliminary testNot done

OK, in print MWR

OK, not complete

First meeting OK

LM_Z

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.

Idealized 1D advection test

analytic sol.implicit 2. orderimplicit 3. orderimplicit 4. order

C=1.580 timesteps

C=2.548 timesteps

Verbesserte Vertikaladvektion für

dynamische Var. u, v, w, T, p‘

case study ‚25.06.2005, 00 UTC‘

total precipitation sum after 18 hwith vertical advection 2. order

difference total precpitation sum after 18 h‚vertical advection 3. order – 2. order‘

Improved vertical advektion for dynamic var. u, v, w, T, p‘

starting point after 1 h after 1 h

modified version:pressure gradient on z-levels, if

|metric term| > |terrain follow. term|

cold pool – problem in narrow valleys

is essentially induced by pressure gradient term

T (°C)

J. Förstner, T. Reinhardt

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 ThomasCP OK

• Radiative upper boundary condition: OK• LM User Seminar / Advanced Numerics Seminar

OK