Question about initial clm file for coupled cesm runs (1977-2024)

ShannondeRoos

Shannon
New Member
Dear CESM team,

I have a question about the setup of a project, in which we will run multiple ensembles with the fully coupled CESM2.2. Essentially, we run the experiments with nudged SST and also do multiple experiments forcing land (prescribed soil moisture) and circulation (prescribed horizontal winds). The goal of these experiments is to assess driving components behind extreme events, leading to significant crop failures. To recreate these events, we therefore alos do an experiment in which all three components (ocean, land, atmosphere) are prescribed. It follows the approach from Wehrli et al. (2019): https://doi.org/10.1029/2019JD030635
Our main goal is to evaluate the drivers behind crop yield losses.

My main question is; is it okay that in our current setup, we use the default initial file of the year 2000 for the CLM5.0 model, while simulations start at 1977? We will omit the first ~7 years from analysis to count as spin-up time.

Kind regards,
Shannon
 

slevis

Moderator
Staff member
One way to possibly answer your question might be to look at the simulated trends in various fields of interest over the 7-year spin-up period. If you find trends that affect the outcomes of your simulations, then you may revisit the length of spin-up or the choice of initial conditions.
 
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