How to run compset B1850 with year 2000 input - can't find input data

[camillaws]

I want to run a fully coupled simulation of cesm 2.1 for year 2000. As I did not find a "B2000" compset I created a case based on B1850. It says in the compset definition overview that initialization times can be set to 1850 or 2000:

CESM2.2.2 Component Sets Definitions

Component Sets Definitions for CESM2.2.2

www.cesm.ucar.edu

I think I have managed to get most of the namelist values set up correctly, including year 2000 values for the solar constant, greenhouse gases and aerosols. However, the initialization file is still the original B1850 one, see "ncdata" in this excerpt from CaseDocs/atm_in:
/
&cam_initfiles_nl
bnd_topo = '/cluster/projects/nn9188k/cesm2.1.1/inputdata/atm/cam/topo/fv_1.9x2.5_nc3000_Nsw084_Nrs016_Co120_Fi001_ZR_GRNL_031819.nc'
ncdata = 'b.e20.B1850.f19_g17.release_cesm2_1_0.020.cam.i.0301-01-01-00000.nc'
use_topo_file = .true.
/
I cannot find one that seems to reflect year 2000 conditions, and I have looked here:

https://svn-ccsm-inputdata.cgd.ucar.edu/trunk/inputdata/cesm2_init/

I am using resolution f19_g17 for my run.

I'm not sure if I'm looking in the wrong places or if the year 2000 initial conditions should be specified in other ways that I think. Please let me know if you know what I'm missing here! :)

 

[hannay]

I would use a CMIP6 run restart.

I put a set of restart files on the ftp server:
ftp://ftp.cgd.ucar.edu/pub/hannay

b.e21.BHIST.f19_g17.CMIP6-historical-2deg.001.rest.2000-01-01-00000.tar

You need to put the file into your run directory and untar it.

To tell the model to start from these initial state, you can set:
./xmlchange RUN_TYPE=hybrid
./xmlchange RUN_REFCASE=b.e21.BHIST.f19_g17.CMIP6-historical-2deg.001
./xmlchange RUN_REFDATE=2000-01-01

 

[lvxin]

I would use a CMIP6 run restart.

I put a set of restart files on the ftp server:
ftp://ftp.cgd.ucar.edu/pub/hannay

b.e21.BHIST.f19_g17.CMIP6-historical-2deg.001.rest.2000-01-01-00000.tar

You need to put the file into your run directory and untar it.

To tell the model to start from these initial state, you can set:
./xmlchange RUN_TYPE=hybrid
./xmlchange RUN_REFCASE=b.e21.BHIST.f19_g17.CMIP6-historical-2deg.001
./xmlchange RUN_REFDATE=2000-01-01

Dear hannay，
The ftp://ftp.cgd.ucar.edu/pub/hannay directory is empty, what's the problem？

 

[Ting-Hui Lee]

Hi,

I would like to run a B2000 case using CESM2.3 on my machine. May I download your restart file? The link ftp://ftp.cgd.ucar.edu/pub/hannay is not working.
Could anyone provide me with another link for downloading the restart file? Thank you so much.

Best regards

 

[Xun Li]

I would use a CMIP6 run restart.

I put a set of restart files on the ftp server:
ftp://ftp.cgd.ucar.edu/pub/hannay

b.e21.BHIST.f19_g17.CMIP6-historical-2deg.001.rest.2000-01-01-00000.tar

You need to put the file into your run directory and untar it.

To tell the model to start from these initial state, you can set:
./xmlchange RUN_TYPE=hybrid
./xmlchange RUN_REFCASE=b.e21.BHIST.f19_g17.CMIP6-historical-2deg.001
./xmlchange RUN_REFDATE=2000-01-01

Dear Hannay,
The ftp server:ftp://ftp.cgd.ucar.edu/pub/hannay is not working now, I need the restart file for the year 2000 of the "BHIST" compset with the resolution f19g17, thank you very much.

 

[strandwg]

Dear Hannay,
The ftp server:ftp://ftp.cgd.ucar.edu/pub/hannay is not working now, I need the restart file for the year 2000 of the "BHIST" compset with the resolution f19g17, thank you very much.

Please retrieve

ftp://ftp.cgd.ucar.edu/pub/strandwg/b.e21.BHIST.f19_g17.CMIP6-historical-2deg.001.rest.2000-01-01-00000.tar

 

[Xun Li]

Please retrieve

ftp://ftp.cgd.ucar.edu/pub/strandwg/b.e21.BHIST.f19_g17.CMIP6-historical-2deg.001.rest.2000-01-01-00000.tar

The link works, thanks a lot!