How to generate SST forcing dataset for running a CESM2 pacemaker experiment?

[Jerry]

What version of the code are you using?
CESM2.1.3
Have you made any changes to files in the source tree?
No
Describe every step you took leading up to the problem:

If this is a port to a new machine: Please attach any files you added or changed for the machine port (e.g., config_compilers.xml, config_machines.xml, and config_batch.xml) and tell us the compiler version you are using on this machine.
Please attach any log files showing error messages or other useful information.

Describe your problem or question:
Dear all,
I want to run a SST pacemaker experiment using CESM2.1.3 with SST in the tropical Atlantic restored to the observations.
I follow the instruction in CESM2 Pacific Pacemaker Ensemble Instructions | Community Earth System Model and
have difficulties in the step of generating the SST forcing files.
I have no idea how to prepare the SST forcing files. What is the time resolution of these forcing files? Are they hourly or monthly averages?
If they are hourly, how can I interpolate the monthly averages to hourly values?
Does NCAR provide any scripts on data reprocessing of the SST forcing files?
I would appreciate any response.

 

[islas]

Hi Jerry,

The original CESM2 pacemakers were run with monthly SSTs. They need to contain SST in netcdf files that contain the following i.e., the SSTs you want to use as input on the POP grid....



The naming convention of the files should be that at the end they contain YYYY.DDD.HH where YYYY is the year, DDD is the Julian Day and HH is the hour. So you should have a series of files that each have one timestamp for SST in them with the filename indicating what that timestamp e.g., here are the first files in our input directory

 

[Jerry]

Hi Jerry,

The original CESM2 pacemakers were run with monthly SSTs. They need to contain SST in netcdf files that contain the following i.e., the SSTs you want to use as input on the POP grid....

View attachment 5597

The naming convention of the files should be that at the end they contain YYYY.DDD.HH where YYYY is the year, DDD is the Julian Day and HH is the hour. So you should have a series of files that each have one timestamp for SST in them with the filename indicating what that timestamp e.g., here are the first files in our input directory

View attachment 5598

Hi, Islas,​

Your answer has been very helpful to me, and it has made me understand the format for building SST force files.​

On the other hand, I wonder if I could have permission to download the files you listed, so that I don't have to create the SST force files myself. Or at least, could I get a year's worth of files to test if the other steps of the pacemaker can be successful?​

Yours,
Jerry

​

​

 

[asphilli]

Hi Jerry,
I tarred up all of the files that Isla cited and put them on our ftp site. You can access the tar file directly here:
https://ftp.cgd.ucar.edu/pub/asphilli/ModifiedSST_ERSST.tar (~800MB)
Let me know if you have any trouble downloading the file.
Best,
Adam

 

[islas]

Also, just a clarification in case anyone is looking at this forum post a long time from now - these files will only stay on the ftp server for a limited time so you might no longer find them there.

 

[Jerry]

Hi Jerry,
I tarred up all of the files that Isla cited and put them on our ftp site. You can access the tar file directly here:
https://ftp.cgd.ucar.edu/pub/asphilli/ModifiedSST_ERSST.tar (~800MB)
Let me know if you have any trouble downloading the file.
Best,
Adam

Thanks Adam,

Hi Jerry,
I tarred up all of the files that Isla cited and put them on our ftp site. You can access the tar file directly here:
https://ftp.cgd.ucar.edu/pub/asphilli/ModifiedSST_ERSST.tar (~800MB)
Let me know if you have any trouble downloading the file.
Best,
Adam

Thank you for uploading the files!
I have successfully downloaded them.
Best,
Cao.