== DYCOMS ==

=== Purpose === 
With this example stratocumulus-topped boundary layers can be studied.

=== Description === 
The setup is based on the [http://www.knmi.nl/~siebesma/BLCWG/ GCSS] LES intercomparison case [http://www.atmos.ucla.edu/~bstevens/dycoms/rf01/rf01.html DYCOMS-II-RF01] ([http://dx.doi.org/10.1175/MWR2930.1 Stevens et al. (2005)]). It describes stratocumulus convection in the sub-tropics over the ocean. With PALM, a well-mixed, coupled boundary layer with a continuous cloud deck can be simulated. Results from DYCOMS simulations with PALM were published in Heinze et al., (2012).

=== References ===
* '''Heinze, R., S. Raasch and D. Mironov, 2012: Budgets of scalar fluxes for cloudy boundary layers'''\\ 20th Symposium on Boundary Layers and Turbulence, Boston, MA, USA (talk) [https://ams.confex.com/ams/20BLT18AirSea/webprogram/Manuscript/Paper209161/heinze_ams20blt.pdf extended abstract]\\\\

=== PALM version ===
[[CRev(0,995)]]

=== Required user code ===
Please find the user code [[attachment:user_code.tar|attached]]. The DYCOMS case requires a special radiative forcing which is contained in calc_radiation_dycoms.f90. Due to this radiation scheme, small adjustments in the Makefile and in prognostic_equations.f90 are necessary. Additionally, prandtl_fluxes.f90 has to be slightly modified. The files mentioned before can be found in the attachment [[attachment:user_code.tar|user_code]] in addition to the user routines. All the files in the [[attachment:user_code.tar|attachment]] have to be placed in the same directory as the user routines.

=== Parameter files ===
Please find the parameter file [[attachment:dycoms_p3d|attached]]. 

=== Model run ===
The basic command is\\\\
{{{mrun -d dycoms -r "d3# ts# pr# xy# 3d#" -X 128 -T 8 -t ????}}}\\\\
Please set other options, such as {{{-h}}}, {{{-K}}}, and {{{-q}}}  according to your needs. Note that this example will require 128 processors for at least ???? minutes. If you want to carry out this job with less processors, please adjust the parameter file accordingly.

=== Monitoring ===
Please find the run control file [[attachment:dycoms_rc|attached]]. 

=== Postprocessing ===
The results of the simulation are in accordance with the results of most of the other LES models which took originally part in the LES intercomparison. For a quantitative comparison, the LES data of the models is available [http://gcss-dime.giss.nasa.gov/dycoms-ii/modsim_dycoms-ii_gcss7-rf01.html here].