How to run an ocean-only simulation for SSP585 (using BSSP585 forcing)?

[yujiezhang]

Hi everyone,


I would like to run an ocean + sea-ice only simulation under the SSP585 scenario. The default compset for this scenario seems to be BSSP585, but it activates all components.


My goal is:

• POP + CICE active
• ATM / LND / ROF as data components
• Forcing consistent with SSP585

Is there an existing compset for this? Or a recommended way to modify BSSP585 (e.g., switching to DATM while keeping SSP585 forcing)?


Any guidance would be appreciated. Thanks!

 

[mlevy]

Unfortunately there is not an existing compset for this -- there was discussion about including future scenarios in the Ocean Model Intercomparison Project, but creating atmospheric forcing datasets for those runs is difficult. Switching the BSSP585 to use DATM isn't sufficient, you need to generate datasets for DATM to pass to POP2 and CICE.

I asked a few people I thought might have experience with this, and one recommendation would be to follow the steps in Alexander et al (2020); they were running the ROMS ocean model, but I think discuss how to generate forcing files from a fully coupled simulation to use in the forced ocean sea-ice run. Note that there is no guarantee of scientifically valid results if you run CESM in this manner...