- Proposed Duration:
- 360 min.
- Proposed Averages:
- Starting after 120 min.
- Averages each hour (hour3,hour4,hour5,hour6)
-
The radiation parameterization scheme should be switched off since the
prescribed radiative cooling is applied.
( see section 3.4 ).
-
The boundary layer scheme should be modified so that the prescribed
surface fluxes ( see section 3.3 )
can be imposed.
-
A boundary-layer scheme for the turbulent transport in the dry PBL
-
One (or more) cloud scheme(s) for condensation and
turbulent transport processes in the cloud layer
-
4. Simulation Instructions
4.1 Simulation instructions for the 2d and 3d models
In the 3d LES runs carried out for this case thus far, a steady state was reached after 2~3 hours (Siebesma and Cuijpers 1995). We therefore propose to let the model develop during the first 2 hours. After this period we require hourly averaged output during four hours. To sum up:
4.2 Simulation instructions for 1d models
We request a 1d-run of 36 hours with a timestepping of 300 sec using the standard model formulation. We deliberately have chosen a longer simulation period than used for the 2d and 3d models, since we want to compare the steady-state solutions of the various 1d-models. Our experience is that not every 1d-model has a steady-state solution close to the initial profiels (Siebesma and Holtslag 1996). After 36 hours however most models will have "found" their steady-state solution.
During the 1d-runs: