Change forcing from PD to piControl in CM2

Earth System
,
1

Hello,

How do I change a CM2 suite from present day to pre-industrial?

Thanks,
Wilma

2

Hi Wilma

Whats the goal here - can you just start with a PI configuration (e.g. cy339)?

I guess you want to use the spun-up ocean from a PD experiment for a PI control experiment ?

3

Hi, I’m using the CM2-025 configuration which is PD and now want to do a piControl run, if that helps.

1 Like
4

Hi @wghuneke, I’ll try and take a look into which changes will need to be made. Is your PD CM2-025 configuration available to checkout from mosrs?

1 Like
5

Hi @wghuneke, @MartinDix has shared this comparison between the 1 degree PI and 1 degree PD suites (mosrs login required).

You should be able to apply the opposite changes to swap to the pre-industrial forcings. Specifically the changes to the spectral files, gas MMRs, and ozone and emissions ancillaries. The changes to the suite.rc were related to cleaning up the suite, and shouldn’t need to be reversed.