[MITgcm-support] MITgcm-support Digest, Vol 263, Issue 1

[ht]

Hello,

Sorry for the confusion in my previous message — I had misunderstood and assumed that orbital forcing could be imposed as a timeseries file, similar to SST forcing. After checking the code, I found that incoming solar radiation is computed internally in pkg/aim_v23/phy_radiat.F.

Since I am trying to perform paleoclimate modeling, I would like to ask the following:
Is there a way in MITgcm to vary the orbital forcing (e.g., obliquity, eccentricity, and precession) over time during a simulation, or alternatively, to specify different orbital parameters for each simulation run?

Thank you very much for your guidance and assistance.

Best regards,
Fisher

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> 1. Using Solar Radiation Data as Boundary Condition in AIM+OCN
> Coupled Simulation (ht)
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> Message: 1
> Date: Sat, 03 May 2025 12:24:36 +0000
> From: ht ht.fisher at protonmail.com
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> To: "MITgcm-support at mitgcm.org" MITgcm-support at mitgcm.org
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> Subject: [MITgcm-support] Using Solar Radiation Data as Boundary
> Condition in AIM+OCN Coupled Simulation
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> Hello,
>
> I am currently working on a coupled simulation by modifying the cpl_aim+ocn case from the verification directory. I would like to use solar radiation data as a boundary condition instead of SST or LST.
>
> However, I am unsure about the correct approach. I tried enabling shortwave heating by #define SHORTWAVE_HEATING for the atmosphere, but this does not seem appropriate, as the surfQsw file appears to represent the net shortwave flux at the sea surface.
>
> Could you please advise me on the proper way to use solar radiation data as a boundary condition?
>
> Thank you very much for your time and assistance.
>
> Best regards,
> Fisher
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