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Is there available CLM-CN spin-up initial condition files for download?

M

meir02ster@gmail_com

Member
Dear all;

In the user guide, it recommends to run CLMCN for 600 years (accelerated spin-up), and then run it for a simulation year to derive the restart file for a further spin up of CN (at least 50 years).

I am wondering if first-step spin-up initial files (after 600 years) are avaialbe to download somewhere. I will appreciate if someone can provide an answer.

Rui
 
slevis

slevis

Moderator
Certain spun up files (from the last and not the first step) are publicly available with the 2010 ccsm4 and cesm1 releases. These can be mapped to different resolutions using the interpinic tool, also available with the 2010 model releases. If fellow users have other files that they are willing to share, that's great, too.

Sam Levis
 
M

meir02ster@gmail_com

Member
slevis said:
Certain spun up files (from the last and not the first step) are publicly available with the 2010 ccsm4 and cesm1 releases. These can be mapped to different resolutions using the interpinic tool, also available with the 2010 model releases. If fellow users have other files that they are willing to share, that's great, too.

Sam Levis
Click to expand...

Dear Sam,

Thank you for your reply. I still have a question though. For example, if I do a ccsm run (without CN), the initial land surface file is "clmi.BCN.2000-01-01_1.9x2.5_gx1v6_simyr2000_c100309.nc" and there is no carbon information such as soil carbon etc. in the history or restart file, which make sense. However, on the other hand, if I do a ccsm run with CN, the initial land surface file it uses is the same and there will be carbon variables in the output histroy file. But where is the inital carbon information in the run with CN, if the initial condition file "clmi.BCN.2000-01-01_1.9x2.5_gx1v6_simyr2000_c100309.nc" is a spun-up file, I would expect to find some carbon information in the file.

I will appreciate if you can help me understand this. Thank you very much.

Rui
 
slevis

slevis

Moderator
The file clmi.BCN.2000-01-01_1.9x2.5_gx1v6_simyr2000_c100309.nc comes from a run with active CN.

Sam
 
D

devarajun@gmail_com

Dev
Member
I am running CLMCN and it ran 1100years but the output is not stable still there is a trend. I am wondering how long it is going to take to reach stable state. If you can provide me spun up files, if u have it will be very useful.

Thanks in advance.
Dev
 
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