[MITgcm-support] Regarding surface diagnostic parameters in DIC package

[kunal madkaiker]

Dear Christoph,

Thank you for your email. I'll check the code as you suggested.

Regards
-Kunal

On Thu, Apr 1, 2021 at 11:58 PM Christoph Voelker <christoph.voelker at awi.de>
wrote:

> Dear Kunal,
>
> to some extent yes. There is a setting of the model where calcite
> dissolution is calculated as a function of calcite saturation state, which
> is switched on by setting CAR_DISS=.true. in DIC_OPTIONS.h. That was
> originally put into the model by Kasten Friis.
>
> In that case, the saturation of CaCO3 is calculated at every depth, which
> implies a calculation of the full carbonate chemistry, including the
> pressure dependence of the equilibrium constants. Have a look into the
> routine calcite_saturation.F if you want to understand how.
>
> Note, hoewever, that it is computationally expensive to do so, and because
> of that the standard setting is not to calculate this at every time step,
> but only every now and then.
>
> I hope that helps to get you started.
>
> Cheers, Christoph
> Am 01.04.21 um 15:03 schrieb kunal madkaiker:
>
> Dear MITgcm users,
>
> My question pertains towards the DIC package, which provides pH, pCO2, CO2
> flux, etc
> as 'surface diagnostics'. As the name suggests, it gives output only at
> surface level.
>
> Is there a way I can simulate these parameters in depth as well? Any
> suggestions?
>
> -Kunal
>
> _______________________________________________
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>
> --
> Christoph Voelker
> Alfred Wegener Institute
> Helmholtz Centre for Polar and Marine Research
> Am Handelshafen 12
> 27570 Bremerhaven, Germany
> e: Christoph.Voelker at awi.de
> t: +49 471 4831 1848
>
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