Numerous component sets (i.e. compsets) are provided "out-of-the-box" with CESM release. You can also call create_newcase giving it the -user_compset argument to point to your own customized component set name.
In CESM1.2, the component set definition file, $CCSMROOT/scripts/ccsm_utils/Case.template/config_compsets.xml has been redefined to be hierarchical. The following documents the rules involved for generating a compset from the hierarchy. The compononent set longname is given by the following notation:
TIME_ATM[%phys]_LND[%phys]_ICE[%phys]_OCN[%phys]_ROF[%phys]_GLC[%phys]_WAV[%phys][_BGC%phys] TIME = Time period (e.g. 2000, 20TR, RCP8...) ATM = [CAM4, CAM5, DATM, SATM, XATM] LND = [CLM40, CLM45, DLND, SLND, XLND] ICE = [CICE, DICE, SICE, SICE] OCN = [POP2, DOCN, SOCN, XOCN,AQUAP] ROF = [RTM, DROF, SROF, XROF] GLC = [CISM1, SGLC, XGLC] WAV = [SWAV, XWAV] BGC = optional BGC scenario
The optional %phys attributes specify submodes of the given system ALL the possible %phys choices for each component are listed with the -list command for create_newcase and also summarized below.
========================================= Time period (first four characters) ========================================= 1850 => pre-industrial 2000 => present day 20TR => transient 1850 to 2000 5505 => transient 1955 to 2005 9205 => transient 1992 to 2005 RCP8 => transient RCP8.5 future scenario RCP6 => transient RCP6.0 future scenario RCP4 => transient RCP4.5 future scenario RCP2 => transient RCP2.6 future scenario NUKE => Nuclear winter hypothetical scenario (based on RCP4.5) 1996 => present day with conditions for solar minimum in 1996 AMIP => transient for "stand-alone" CAM (1979 startdate) GEOS => GEOS5 metereology for "stand-alone" CAM ========================================= CAM ========================================= CAM4% => cam4 physics CAM5% => cam5 physics CAM%WCCM => CAM WACCM with daily solar data and SPEs: CAM%WCMX => CAM WACCM-X: CAM%WCSC => CAM WACCM specified chemistry: CAM%WCBC => CAM WACCM with the stratospheric black carbon CARMA model: CAM%WCSF => CAM WACCM with sulfur chemistry and the sulfate CARMA model: CAM%FCHM => CAM super_fast_llnl chemistry: CAM%TMOZ => CAM trop_mozart chemistry: CAM%MOZM => CAM trop_mozart_mam3 chemistry: CAM%MOZS => CAM trop_mozart_soa chemistry: CAM%SMA3 => CAM trop_strat_mam3 chemistry: CAM%SMA7 => CAM trop_strat_mam7 chemistry: CAM%SSOA => CAM trop_strat_soa chemistry: CAM%RCO2 => CAM CO2 ramp: ========================================= CLM ========================================= note: [^_]* means match zero or more of any character BUT an underbar. (in other words make sure there is NOT a underbar before the string afterwards) CLM40 => clm4.0 Physics CLM40%[^_]*SP => clm4.0 Satellite phenology CLM40%[^_]*CN => clm4.0 Carbon Nitrogen CLM40%[^_]*CNDV => clm4.0 Carbon Nitrogen Dynamic Vegetation CLM40%[^_]*CROP => clm4.0 Prognostic crop CLM40%[^_]*SNCR => clm4.0 SNICAR radiative forcing calculation on CLM45 => clm4.5 Physics CLM45%[^_]*SP => clm4.5 Satellite phenology CLM45%[^_]*CN => clm4.5 Carbon Nitrogen Biogeochemistry (BGC) (as in CLM4.0) CLM45%[^_]*CNDV => clm4.5 Carbon Nitrogen BGC with Dynamic Vegetation CLM45%[^_]*BGC => clm4.5 BGC (CN with vertically resolved soil BGC, based on Century with Methane) CLM45%[^_]*CROP => clm4.5 Prognostic crop CLM45%[^_]*VIC => clm4.5 VIC hydrology CLM40%[^_]*SNCR => clm4.0 SNICAR radiative forcing calculation on CLM45%[^_]*BGCDV => clm4.5 BGC (CN with vertically resolved soil BGC, based on Century with Methane) with dynamic veg ========================================= CICE ========================================= CICE => prognostic cice CICE%PRES => prescribed cice ========================================= POP2 ========================================= POP2 => POP2 default POP2%ECO => POP2/Ecosystem POP2%DAR => Darwin marine ecosystem (not supported in community releases) ========================================= RTM ========================================= RTM => default RTM model RTM%FLOOD => RTM model with flood ========================================= CISM ========================================= CISM1 => cism1 (default, serial only) ========================================= DATM ========================================= DATM%QIA => QIAN atm input data (1948-1972) DATM%CRU => CRUNCEP atm input data for (1901-2010) DATM%S1850 => CPL history atm input data DATM%1PT => single point tower site atm input data DATM%NYF => COREv2 datm normal year forcing DATM%IAF => COREv2 datm interannual year forcing ========================================= DLND ========================================= DLND%NULL => dlnd_mode is NULL , dlnd_sno_mode is NULL DLND%SCPL => dlnd_mode is NULL , dlnd_sno_mode is CPLHIST (used for TG) DLND%LCPL => dlnd_mode is CPLHIST, dlnd_sno_mode is NULL ========================================= DROF ========================================= DROF%NYF => COREv2 drof normal year forcing DROF%IAF => COREv2 drof interannual year forcing DROF%NULL => null mode ========================================= DICE ========================================= DICE%SSMI => dice mode is ssmi DICE%SIAF => dice mode is ssmi_iaf DICE%PRES => dice mode is prescribed DICE%COPY => dice mode is copy DICE%NULL => dice mode is null ========================================= DOCN ========================================= DOCN%NULL => docn null mode DOCN%SOM => docn slab ocean mode DOCN%DOM => docn data mode DOCN%US20 => docn us20 mode DOCN%COPY => docn copy mode
There are two ways to create a customized user-defined component set. If the component set you want is not listed in the supported component sets, and you have no new optional %phys definitions for any of the components, then using the above definitions you can create your own component set on the fly by using your own longname definition to create_newcase. As an example, the following will create a compset that is not currently supported out-of-the-box in CESM1.2.
> ./create_newcase -case mycompset \ -user_compset 1850_CAM5_CLM45%CN_CICE_POP2_RTM_SGLC_SWAV \ -res ne30_g16 \ -mach yellowstone
If you want to create a component set that has new physics definitions, then the process is a bit more complicated. You will need to first edit $CCSMROOT/scripts/ccsm_utils/Case.template/config_compset.xml and fill in the appropriate sections specified by the string "USER_DEFINED section" as necessary. At that point, you can then call ./create_newcase as above with the -user_compset argument that is now customized to our requirements.