b40.1850.track1.2deg.003/b40.1850.track1.1deg.006 CESM tags

[hkleppin]

I plan to start a branch run from the 1850 control run (b40.1850.track1.2deg.003 - 1deg ocean/2deg atmosphere), but using the 1deg atmosphere ( b40.1850.track1.1deg.006) for that branch run. I want to use the restart files from the 1deg atmosphere and the ocean restart files from the 2deg atmosphere run.
So i was wondering whether both runs used the same CESM tag?

 

[hannay]

From Andy about the cesm tags:

The b40.1850.track1.2deg.003 case was originally built from the ccsm4_0_beta35 tag. Starting at model year 0587-01-01, the integration was carried out using an executable built from ccsm4_0_beta41. The history file output from these two executables is bit-for-bit for this case.

The b40.1850.track1.1deg.006 case was originally built from ccsm4_0_beta23 but changed to ccsm4_0_beta29 at model year 0301-01-01. I do not know whether these are bit-for-bit or not. At model year 0715-01-01 the nitrogen deposition file was changed and also some source mods in the ocn overflows.F90 source file were made.

 

[hannay]

After clarifying offine with Hannah, she wants to use the restart files from the 1deg atmosphere/land (b40.1850.track1.1deg.006) but ocean restart files coming from another run (b40.1850.track1.2deg.003).Set an hybrid run from b40.1850.track1.1deg.006:In env_run.xml, set:RUN_TYPE=hybrid
RUN_REFDATE=0300-01-01 (I picked year 300 as an exmpale to show ho to set this, pick the year you want to start from)
RUN_REFCASE=b40.1850.track1.1deg.006
GET_REFCASE=FALSE We will provide later instructions on how to use a spunup ocean with an hydrid run.Note that the instructions on how to run with a spunup ocean in the CESM user guide are for a startup run and NOT for an hybrid run.
http://www.cesm.ucar.edu/models/cesm1.2/cesm/doc/usersguide/x2369.html