the subsoil temperature in the CAM initial condition

[huihuojia@163_com]

There are variables related to land model in CAM's IC:

double TS1(time, lat, lon) ;
TS1:long_name = "TS1 subsoil temperature" ;
TS1:units = "K" ;
double TS2(time, lat, lon) ;
TS2:long_name = "TS2 subsoil temperature" ;
TS2:units = "K" ;
double TS3(time, lat, lon) ;
TS3:long_name = "TS3 subsoil temperature" ;
TS3:units = "K" ;
double TS4(time, lat, lon) ;
TS4:long_name = "TS4 subsoil temperature" ;
TS4:units = "K" ;

1. why puts these variables related to land model in CAM's IC, not CLM's IC?
2. If I want to use a real-time initial condition for CAM, I may need to interpolate the real-time data into the CAM grid for variables like temperature, U/V wind. Then could I do this interpolation for TS1/TS2/TS3/TS4 using real-time soil temperature data?
3. What are the depths of these four variables?

Thanks

 

[eaton]

These variables no longer need to be in CAM's IC file.  They were used by the CAM standalone version of the CSIM4 component which was still an option in CAM4, but was removed in CAM5. 

 

[huihuojia@163_com]

Does that mean if I use the CESM script to run F_2000 compset, even I use -phys CAM4, the CSIM4 component won't use the TS variables?And are the TS variables needed by the CLM component? or just need by CSIM4 in CAM4?Thanks

 

[eaton]

There is no csim4 component in the F_2000 compset.The argument "-phys cam4" does not imply you are using the CAM4 model.  It means you are using the cam4 physics package which can be run from the CAM5 model.CLM does not look at CAM's initial file.  If it did need TS variables it would be getting them from somewhere else. 

 

[huihuojia@163_com]

Thanks for your help.and I have another question, there is the TIME variable in the compset longname:The notation for the compset longname is   TIME_ATM[%phys]_LND[%phys]_ICE[%phys]_OCN[%phys]_ROF[%phys]_GLC[%phys]_WAV[%phys][_BGC%phys]and TIME could be: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 scenarioRCP6 => transient RCP6.0 future scenarioRCP4 => transient RCP4.5 future scenarioRCP2 => transient RCP2.6 future scenario2013 => RCP4.5 based scenario from 2013 (control for WACCM/CARMA nuclear winter study)1996 => present day with conditions for solar minimum in 1996AMIP => transient for "stand-alone" CAM (1979 startdate)GEOS => GEOS5 meteorology for "stand-alone" CAM what is the main difference among these times? Is that based on CO2 content?Thanks