Questions about CAM input data

[yelin_jiang@uconn_edu]

Hi Scientists,
I am doing some sensitive tests about land surface effects on suppressing precipitation through CAM6-CLM5 with prescribed SST and Sea ice. Therefore, I chose FHIST as a component and f09_f09_mg17 as the resolution. I intend to do the control simulation from 1990 to 2018/2019 to cover the four major drought events in the Amazon region (1998, 2005, 2010, and 2016). However, when I finish the configuration of my case. The default SST setting is from 1850 to 2017, and I replace the data with the SST 1850-2020. However, for others settings in the cam and clm input list, there is no data after 2015, e.g. tracer_cnst_file, flbc_file, prescribed_strataero_file.
I am not sure whether the case run can be successful after 2015. Do you have some suggestions for that? Or is there any replace data available?
Thanks in advance,
Yelin

 

[oleson]

I'm going to move this to the CAM forum where they have more experience with these types of coupled runs and the questions here seem to have to do more with CAM than CLM datasets.
In general, CLM historical datasets run through 2015. After that, one would have to use one of the future scenarios datasets. Or repeat the 2015 data for the years you want to simulate after that.

 

[hannay]

For the missing datasets in CAM, we often use one of the SSP datasets.

 

[islas]

To give an example of what Cecile suggested, if you're working on cheyenne, you could look at /glade/u/home/islas/CVCWG/GOGAextension_2020/namelists/user_nl_cam. This is the namelist that we used for extending the CAM6 GOGA simulations for the Climate Variabillity and Change working group out to 2020 and everything below at and below the line "&aircraft_emit_nl" is specifying the forcings to be those of SSP370. Alternatively, if you're working somewhere else, you could create a BSSP370 case and look at the namelist and copy over the relevant parts.

 

[yelin_jiang@uconn_edu]

Thanks for all your feedback. Now I try two methods to solve this problem. The first one uses some SSP data as Cecile and Islas suggested and the other one is similar to Keith's method but using fixed mode. Since my objective is to test the land feedback, the CAM chem may not be very important to my results. Maybe the second one will be better. Thanks again!
Yelin