met.no wikis project index
met.no bugzillas index
About this installation
This menu is a sidebar menu. To create a custom sidebar menu in your own project create a page with the name «sidebar».
NOTE THAT THE COMPSETS MENTIONED IN THIS EXAMPLE ARE NO LONGER MAINTAINED! THE GENERAL EXPLANATION AND IDEAS ARE STILL VALID!
The essential file to edit is
This examples shows how to simply add a to the “F_AMIP_CAM5” compset:
Under “<!– F compsets –>”, add
<COMPSET sname="F_AMIP_CAM5-OSLO" alias="FAMIPOSLO" >AMIP_CAM5%OSLO_CLM40%SP_CICE%PRES_DOCN%DOM_RTM_SGLC_SWAV</COMPSET>
The “CAM5%OSLO” options have to be defined, so a line like this is needed:
<CAM_CONFIG_OPTS compset="_CAM5%OSLO" >-phys cam5 -cam_oslo aerlife</CAM_CONFIG_OPTS>
The compset needs a description, we also need the line
<desc compset="_CAM5%OSLO">cam 5 physcs and oslo aerosols</desc>
We could also define a specific use-case (namelist) for our compset. This would need a line like:
<CAM_NML_USE_CASE compset="_CAM5%OSLO" >my_namelist</CAM_NML_USE_CASE>
This would only work if the file my_namelist.xml exists as
It should now be possible to create a new case directory, which we here name FAMIPOSLOtst and configure with 1 degree horizontal atmospheric resolution;
./create_newcase -case ../cases/FAMIPOSLOtst -compset FAMIPOSLO -mach hexagon -res f09_f09
and finally set up and compile the model:
In NorESM there are 3 new config-options for CAM:
They change number of tracers and turn on different preprocessor flags in in a perl script called “configure”, see:
To understand the implementation do:
svn diff -r 202 models/atm/cam/bld/configure
The new oslo-options also need to be defined, see
To see how these new options were added, do:
svn diff -r 202 models/atm/cam/bld/config_files/definition.xml
First run the model to produce 6 hourly data. The following namelists are needed:
user_nl_cam &camexp mfilt = 1, 4, nhtfrq = 0, -6, avgflag_pertape ='A','I', fincl2 = 'PS','U','V','TAUX','TAUY','FSDS','TS','T','Q','PHIS','QFLX','SHFLX'
user_nl_clm &clmexp hist_mfilt = 1,4 hist_nhtfrq = 0,-6 hist_avgflag_pertape = 'A','I' hist_fincl2 = 'SNOWDP','H2OSNO','H2OSOI'
First create a compset which has the configure-option “-offline_dyn”. Check in config_compsets.xml which compsets have this configure-option added. See for example the compset NFAMIPNUDGEPTAERO in https://svn.met.no/NorESM/noresm/branches/featureCAM5-OsloDevelopment_trunk2.0-1/noresm/scripts/ccsm_utils/Case.template/config_compsets.xml
Then use this compset to create a case. You need the following user-input (for example in your user_nl_cam)
&metdata_nl met_data_file='/work/shared/noresm/inputForNudging/FAMIPC5NudgeOut/atm/hist/FAMIPC5NudgeOut.cam.h1.1979-01-01-00000.nc' met_filenames_list = '/work/shared/noresm/inputForNudging/FAMIPC5NudgeOut/atm/hist/fileList.txt'
This info can be added directly in a use_case which you associate with the compset created (see e.g. 2000_cam5_oslonudge.xml)
where met_data_file is the first met-data file to read, and met_filenames_list is a list of the following met-data. The first lines of the file should look something like this (guess what the rest of the file should look like? : )
/work/shared/noresm/inputForNudging/FAMIPC5NudgeOut/atm/hist/FAMIPC5NudgeOut.cam.h1.1979-01-01-00000.nc /work/shared/noresm/inputForNudging/FAMIPC5NudgeOut/atm/hist/FAMIPC5NudgeOut.cam.h1.1979-01-02-00000.nc /work/shared/noresm/inputForNudging/FAMIPC5NudgeOut/atm/hist/FAMIPC5NudgeOut.cam.h1.1979-01-03-00000.nc
This file can be created at the place where you put the metdata with this command:
alfgr@hexagon-4:/work/shared/noresm/inputForNudging/FAMIPC5NudgeOut/atm/hist> ls -d -1 $PWD/*.h1.*.nc > fileList.txt
When looking at aerosol indirect effects, it's recommended to nudge only U, V and PS:
&metdata_nl met_nudge_only_uvps = .true.
Choose relaxation time (hours). Use the same time as dt in met_data_file:
&metdata_nl met_rlx_time = 6
Link to ERA-interim metdata instead of model produced metdata. Remember to choose the files corresponding to your resolution (examples below are for f09_f09 and 32 levels in the vertical):
&metdata_nl met_data_file = '/work/shared/noresm/inputdata/noresm-only/inputForNudging/ERA_f09f09_30L_days/2001-01-01.nc' met_filenames_list = '/work/shared/noresm/inputdata/noresm-only/inputForNudging/ERA_f09f09_30L_days/fileList2001-2015.txt'
Add also the ERA-topography (no matter which fields you are nudging):
&cam_inparm bnd_topo = '/work/shared/noresm/inputdata/noresm-only/inputForNudging/ERA_f09f09_30L_days/ERA_bnd_topo.nc'