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Modifying F compset for RCP8.5 conditions in CESM1

Hi there,

I'm trying to build an F compset case using the isotope-enabled version of CESM1, but to use fixed 2100 conditions appropriate for RCP8.5. A compset for this doesn't appear to exist, so I thought I would use an existing F compset and manually modify the namelist variables to be appropriate for RCP8.5 end-of-century. I also need to use CAM5 physics and CN BGC, to make the run consistent with the CESM1 Last Millennium Ensemble.

What I'm confused about is which compset would be the best starting point: I see that there is an F_AMIP_CAM5_CN compset and an F_1850-2000_CAM5_CN option on the list of supported compsets at

Can someone please advise on the differences between these two and which one might be more suitable for modifying in this way? Or maybe it doesn't matter for this purpose?

Thanks!
 
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