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How to judge when CAM spin-up is completed?

Wenshuo

Wenshuo
New Member
Dear all,

I am running CAM simulations (AGCM mode with prescribed SSTs), and I would like to know how to properly judge when the model spin-up is completed.

From what I understand, in coupled CESM runs one usually monitors the net TOM energy balance (e.g., RESTOM = FSNT – FLNT) and checks whether it approaches zero. However, in my CAM-only runs I find that RESTOM does not decrease with time and remains at a non-zero value.
My questions are:
  1. For CAM with prescribed SSTs, what criteria should be used to determine spin-up completion?
  2. Is there a standard diagnostic (e.g., surface temperature, precipitation, or atmospheric energy balance) that should be checked instead of RESTOM?
Any advice or references would be very helpful. Thank you!
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