Scheduled Downtime
On Tuesday 24 October 2023 @ 5pm MT the forums will be in read only mode in preparation for the downtime. On Wednesday 25 October 2023 @ 5am MT, this website will be down for maintenance and expected to return online later in the morning.
Normal Operations
The forums are back online with normal operations. If you notice any issues or errors related to the forums, please reach out to help@ucar.edu

CESM2 default initial condition and spin-up?

M

mengqi

mj
Member
Hi,

I am working with CESM2 and have set up and built an FHIST_BGC case. When checking the CaseDocs/lnd_in file, I noticed that a default initial condition input (i.e., finidat) is specified.

finidat = '/glade/campaign/cesm/cesmdata/inputdata/lnd/clm2/initdata_map/clmi.BHIST.2000-01-01.0.9x1.25_gx1v7_simyr2000_c181015.nc'

My question is: Why does the case provide a default initial condition file? Does this mean I do not need to perform a spin-up simulation, or that I conduct an additional spin-up simulation to replace that default initial file?

Thanks!

M.
 
Sort by date Sort by votes
slevis

slevis

Moderator
Staff member
The model provides default initial conditions for certain compset-grid combinations to allow users to begin meaningful simulations sooner. HOWEVER, before starting production runs that you intend to use in publications, make sure that you are satisfied with the initial conditions because you will need to document them in your papers. In that case, you may decide to complete your own spin-up.
 
Vote Upvote 0 Downvote
M

mengqi

mj
Member
Thank you so much, @slevis!

By the way, I’m not sure how to properly document the default initial conditions in my paper. Could you please provide an example showing how they are originally specified? Thanks!!
 
Vote Upvote 0 Downvote
You must log in or register to reply here.
Top