[MITgcm-support] Surface forcing of ptracers...

[Jody Klymak]

Dear Matt and Manfredi,

Thanks to you both.  I think that is more than enough to point me in the right direction. 

Cheers Jody

Sent from my iPhone

> On May 22, 2022, at 00:01, Manfredi Manizza <mmanizza at ucsd.edu> wrote:
> 
> 
> Hi Jody,
> 
> I think you could  look at code of the DIC package that comes with MITgcm.  You can either strip down the code to 1 tracer and 
> also remove the routine of gas exchange for CO2 or  you can then just copy from that code  the routine for gas exchange of O2 with the  solubility and gas exchange parameters along that you need to make it work and re-adapt to your code.
> 
> In the second case you might need gchem pkg too (is needed for dic pkg too I think) compiled to make it work. Then you add the gas exchange code
> and pass the flux term to your O2- like  tracer tendency only if  k = 1 (surface ocean only).
> 
> Here below  something similar to your case done a while ago where I added the "thermal oxygen"
> but still in the context of a  full bgc model. 
> 
> In that case I just copied the code of the oxygen cycle and removed the 
> "sources minus sink" term so that it becomes "abiotic" only, like  that tracer you want to obtain for
> your study in the fjord if I understood correcly.
> 
> https://www.tandfonline.com/doi/full/10.3402/tellusb.v64i0.18429
> 
> I hope this helps.
> 
> Manfredi
> 
>> On Sat, May 21, 2022 at 2:51 AM Jody Klymak <jklymak at uvic.ca> wrote:
>> Hi all,
>> 
>> I am trying to add a crude oxygen signal to a wind and thermally forced fjord simulation.  I don’t particularly need the oxygen to interact bio-chemically with anything, but I assume it would be more realistic for the gas exchange to depend on the wind speed and the surface oxygen saturation (as a function of T and S).  
>> 
>> I am finding it a little difficult to parse how I might do that.  I don’t see a surface forcing for ptracer.  It seems that maybe biochem has all this, but its still not clear if I should use all this machinery and how to initialize in an idealized sense.  
>> 
>> Any pointers gratefully received.  
>> 
>> Thanks a lot.   Jody
>> 
>> --
>> Jody Klymak    
>> https://urldefense.proofpoint.com/v2/url?u=http-3A__ocean-2Dphysics.seos.uvic.ca_-7Ejklymak_&d=DwIGaQ&c=-35OiAkTchMrZOngvJPOeA&r=igpxhFyItwkD6Vnn8g54Ybzj3kX5f-S1LY9JKm2YT1c&m=nkgsUY2t8ODuPG_Q1j0WukX0YFM4WaWyWHEtpl4Irx0TBNMmMbHsGZcbi8hudusN&s=bZOGEPvGiJv1KgPp3U-2Hzz7Ze3F1qZ-g-DMbG019-8&e= 
>> 
>> 
>> 
>> 
>> 
>> 
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> 
> 
> -- 
> Dr. Manfredi Manizza
> Geosciences Research Division
> Scripps Institution of Oceanography
> University of California San Diego
> 9500 Gilman Drive La Jolla, CA 92093-0244
> email : mmanizza at ucsd.edu
> tel   : +1-858-534-7094
> web   : http://bluemoon.ucsd.edu/mmanizza/ 
> web   : https://mmanizza.scrippsprofiles.ucsd.edu/
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