[MITgcm-support] Frictional heating in the ocean model

[Zhu, Fangze]

Thanks, Martin! I will check how the atmospheric model computes frictional heating and do similar work to diagnose this field for the ocean.

Fangze

On 10/26/20, 5:37 AM, "MITgcm-support on behalf of Martin Losch" <mitgcm-support-bounces at mitgcm.org on behalf of Martin.Losch at awi.de> wrote:

    Hi Fangze,

    I have never used addFrictionHeating, but I have the impression that the field “frictionHeating” is never computed for the oceanic case, i.e. it is always zeros. I cannot find any code to compute frictional heating for the ocean. Feel free to add this missing physics in analogy to atm_phys_tendency_apply* or similar.

    Martin

    > On 20. Oct 2020, at 16:28, Zhu, Fangze <fzhu at albany.edu> wrote:
    > 
    > Hi everyone,
    >  
    > Does anyone know how to calculate the frictional heating due to dissipation of kinetic energy in the ocean model? I believe the variable name is “HeatDiss” and I have already included this variable in the data.diagnostics file.
    >  
    > I have made the following modifications to try to turn on the frictional heating in the ocean model:
    > 	• [CPP_OPTIONS.h] #define ALLOW_FRICTION_HEATING  (the model has been re-compiled after this modification)
    > 	• [data]  addFrictionHeating=.TRUE.,
    > 	• [data]  staggerTimeStep=.TRUE.,  (to include FricHeat in the pickup file)
    >  
    > It turned out that the HeatDiss diagnostics were all zeros. However, this was not the case in the atmospheric model.
    >  
    > Are there any flags I didn’t turn on? How can I let the model update this variable?
    >  
    > Thanks in advance!
    >  
    > Best,
    > Fangze
    >  
    > -------------------------------------------------------------------------
    > Fangze Zhu
    > Department of Atmospheric & Environmental Sciences
    > University at Albany, SUNY
    > fzhu at albany.edu
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