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Hi Wenrui,
<div class=""><br class="">
</div>
<div class="">I have a DIC budget calculation in <a href="https://nbviewer.org/github/seamanticscience/Lauderdale_etal_2016_GBC/blob/master/CO2_Flux_Drivers_Online.ipynb" class="">Jupyter Notebook format</a>. My 3° configuration differs from the tutorial slightly
(I used KPP mixing, the virtual flux, and rigid lid), but it should give you something to compare to. </div>
<div class=""><br class="">
</div>
<div class="">You can see that the biological tendency is more than just DICBIOA, which only represents
<b class="">uptake of phosphate</b> due to net biological production, and DICCARB, which is net change in carbon due to calcite production/remin:</div>
<div class=""><br class="">
</div>
<div class="">
<blockquote type="cite" class=""># Calculate biological activity terms (mol/m2/s)<br class="">
dic_bio_flux = (Rcp*(-dicdiag.DICBIOA+dicdiag.DICPFLUX+dicdiag.DICRDOP)*grid.drF).sel(ZC=slice(0,-kave)).sum("ZC")*grid.cmask.isel(ZC=0)<br class="">
dic_carb_flux = ((dicdiag.DICCARB)*grid.drF).sel(ZC=slice(0,-kave)).sum("ZC")*grid.cmask.isel(ZC=0)<br class="">
</blockquote>
</div>
<div class=""><br class="">
</div>
<div class="">See also the code for <a href="https://github.com/MITgcm/MITgcm/blob/7456fbd729aef084d56996e0e389c63422447ab9/pkg/dic/dic_biotic_forcing.F#L276" class="">S/R dic_biotic_forcing.F</a>.</div>
<div class=""><br class="">
</div>
<div class="">So, first, you need to multiply DICBIOA by the Redfield ratio (R_cp=117), which will get you two orders of magnitude. Then, you may need to include the additional diagnostics for DICPFLUX, which is the remineralization of sinking particulate organic
phosphate, and DICRDOP, which is the remineralization of dissolved organic phosphate, again multiplied by R_cp. </div>
<div class=""><br class="">
</div>
<div class="">You might need to modify the code to get all the diagnostics you need: <span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">PFLUX should appear in your dic_tave file, but </span><font color="#000000" class=""><span style="caret-color: rgb(0, 0, 0);" class="">doesn’t
have a diagnostic package output, </span></font><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">DICRDOP might appear as the g</span><font color="#000000" class="">chem tendency for tracer 4? L</font>et me know if you need further help
with this.</div>
<div class=""><br class="">
</div>
<div class="">DICTFLX is probably the right diagnostic for CO2 fluxes in your case, but you might consider comparing DICTFLX and DICCFLX</div>
<div class=""><br class="">
</div>
<div class="">If you use r* coordinates, then you have to take into account the changing volume of the upper cell (see the <a href="https://ecco-v4-python-tutorial.readthedocs.io/ECCO_v4_Salt_and_salinity_budget.html" class="">example for salt/salinity budgets </a>in
that case)</div>
<div class=""><br class="">
</div>
<div class="">Hope this helps, and sorry if I suggested things you already tried.</div>
<div class=""><br class="">
</div>
<div class="">Cheers,</div>
<div class=""><br class="">
</div>
<div class="">Jonathan</div>
<div class="">
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On Mar 12, 2024, at 12:31, Wenrui Jiang <<a href="mailto:wjiang33@jhu.edu" class="">wjiang33@jhu.edu</a>> wrote:</div>
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Hi,</div>
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<span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;" class="">Thank you all for your help. Thanks to your advice, I can now close the budget when I turn the gchem package off. However, I
am having some difficulties adding in the chemistry and atmospheric flux. Could you tell me what diagnostics are needed? It seems like the diagnostics I am using (DICTFLUX, DICBIOA, DICCARB) are off by some factor, but I could not figure them out.</span></div>
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<span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;" class="">Thanks,</span></div>
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<span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;" class="">Wenrui</span></div>
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<font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">From:</b><span class="Apple-converted-space"> </span>MITgcm-support <<a href="mailto:mitgcm-support-bounces@mitgcm.org" class="">mitgcm-support-bounces@mitgcm.org</a>> on behalf
of Martin Losch <<a href="mailto:Martin.Losch@awi.de" class="">Martin.Losch@awi.de</a>><br class="">
<b class="">Sent:</b><span class="Apple-converted-space"> </span>Tuesday, March 12, 2024 5:03 AM<br class="">
<b class="">To:</b><span class="Apple-converted-space"> </span>MITgcm Support <<a href="mailto:mitgcm-support@mitgcm.org" class="">mitgcm-support@mitgcm.org</a>><br class="">
<b class="">Subject:</b><span class="Apple-converted-space"> </span>Re: [MITgcm-support] Closing DIC budget</font>
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<div class="">Hi Dave,
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</div>
<div class="">thanks for the clarification and sorry for my inaccurate post.</div>
<div class="">In fact, nonlinFreeSurf=4, select_rStar=2, turns on the r-start coordinates (sorry for not saying that in my previous post), and with r-star, the conservation should be most accurate (better than “just” non-linear free surface).
<div class=""><br class="">
</div>
<div class="">Martin<br id="x_lineBreakAtBeginningOfMessage" class="">
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On 11. Mar 2024, at 18:54, Dave Munday - BAS <<a href="mailto:danday@bas.ac.uk" class="">danday@bas.ac.uk</a>> wrote:</div>
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<div style="line-break: after-white-space;" class=""><span class="">I’ve been using the DIC pkg with r* coordinates and get extremely good conservation of all the tracers. I’d expect it to be almost as good with the non-linear free surface, as Martin says.</span>
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</div>
<div class="">Dave</div>
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On 11 Mar 2024, at 07:50, Martin Losch <<a href="mailto:Martin.Losch@awi.de" class="">Martin.Losch@awi.de</a>> wrote:</div>
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<div class=""><span style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; text-decoration: none; float: none; display: inline !important;" class="">Hi,</span>
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you can also try to set exactConserv = .TRUE., in data (but I am not sure if there’s an effect on the passive tracers).</div>
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I am not sure, but I think that the tracer conservation will improve very much with the nonlinear free surface. verification/tutorial_global_oce_biogeo does not use a nonlinear free surface. To turn it on, you’d need to define NONLIN_FRSURF (in CPP_OPTIONS.h),
recompile (“make”) and use the appropriate runtime flags: nonlinFreeSurf=4, select_rStar=2, and maybe hFacInf, hFacSup.</div>
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Martin</div>
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<br class="">
<div class="">
<blockquote type="cite" class="">
<div class="">On 6. Mar 2024, at 17:41, Wenrui Jiang <<a href="mailto:wjiang33@jhu.edu" class="">wjiang33@jhu.edu</a>> wrote:</div>
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Hi Sandy,</div>
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Thank you very much for the suggestion. Although I have not figured out everything yet, but it is now much closer to a closure. Thank you!<br class="">
</div>
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Best,
<div class="">Wenrui</div>
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<font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">From:</b><span class="x_Apple-converted-space"> </span>MITgcm-support <<a href="mailto:mitgcm-support-bounces@mitgcm.org" class="">mitgcm-support-bounces@mitgcm.org</a>> on behalf
of Gregorio Sandy <<a href="mailto:Sandy.Gregorio@uqar.ca" class="">Sandy.Gregorio@uqar.ca</a>><br class="">
<b class="">Sent:</b><span class="x_Apple-converted-space"> </span>Tuesday, March 5, 2024 11:13 AM<br class="">
<b class="">To:</b><span class="x_Apple-converted-space"> </span><a href="mailto:mitgcm-support@mitgcm.org" class="">mitgcm-support@mitgcm.org</a><span class="x_Apple-converted-space"> </span><<a href="mailto:mitgcm-support@mitgcm.org" class="">mitgcm-support@mitgcm.org</a>><br class="">
<b class="">Subject:</b><span class="x_Apple-converted-space"> </span>Re: [MITgcm-support] Closing DIC budget</font>
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</strong><strong class=""><span style="background-color: red; color: white; font-family: "Times New Roman", serif; font-size: 12pt;" class=""> External Email - Use Caution </span></strong></div>
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</span></strong></div>
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<span style="font-family: Arial, Helvetica, sans-serif;" class="">Hi Wenrui,</span></div>
<div class="x_x_elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">
<span style="font-family: Arial, Helvetica, sans-serif;" class=""><br class="">
</span></div>
<div class="x_x_elementToProof"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt;" class="">I had a problem as well in closing my tracers budget (by just looking at timeseries of my tracers integrated over my domain, I could see a drift).
I don't know if it can help you but I added the following line in data.ptracers for all my tracers (1 to 5):</span></div>
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</span></div>
<div class="x_x_elementToProof"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt;" class=""><b class="">PTRACERS_linFSConserve(1)=.TRUE.,</b></span></div>
<pre class=""><div class="x_x_elementToProof"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt;" class="">PTRACERS_linFSConserve applies mean Free-Surf source/sink at surface.</span></div></pre>
<div class="x_x_elementToProof"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt;" class="">Good luck,</span></div>
<div class="x_x_elementToProof"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt;" class=""><br class="">
</span></div>
<div class="x_x_elementToProof"><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt;" class="">Sandy</span></div>
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<div id="x_x_divRplyFwdMsg" dir="ltr" class=""><font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">De :</b><span class="x_Apple-converted-space"> </span>MITgcm-support <<a href="mailto:mitgcm-support-bounces@mitgcm.org" class="">mitgcm-support-bounces@mitgcm.org</a>>
de la part de Wenrui Jiang <<a href="mailto:wjiang33@jhu.edu" class="">wjiang33@jhu.edu</a>><br class="">
<b class="">Envoyé :</b><span class="x_Apple-converted-space"> </span>lundi 4 mars 2024 13:18<br class="">
<b class="">À :</b><span class="x_Apple-converted-space"> </span><a href="mailto:mitgcm-support@mitgcm.org" class="">mitgcm-support@mitgcm.org</a> <<a href="mailto:mitgcm-support@mitgcm.org" class="">mitgcm-support@mitgcm.org</a>><br class="">
<b class="">Objet :</b><span class="x_Apple-converted-space"> </span>[MITgcm-support] Closing DIC budget</font>
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<div class=""><span style="font-weight: bold;" class="">ATTENTION :</span><span class="x_Apple-converted-space"> </span><span style="font-size: 10pt;" class="">Ce courriel provient d'une source externe. Assurez-vous que cette dernière est sûre avant d'ouvrir
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<div class="x_x_x_elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt;" class="">Dear MITgcm support group,<br class="">
<br class="">
Thanks for reading this. My name is Wenrui Jiang, and I am a PhD student from Johns Hopkins. I want to apologize in advance for my inexperience.<br class="">
<br class="">
I am trying to close the DIC budget on the biogeochemical tutorial example (<a href="https://mitgcm.readthedocs.io/en/latest/examples/global_oce_biogeo/global_oce_biogeo.html" originalsrc="https://mitgcm.readthedocs.io/en/latest/examples/global_oce_biogeo/global_oce_biogeo.html" shash="RxEm2QucUKJCMLfTS5on5cxdtUR/WuqLKFGon/C4iObeSrfrFZkqkHGQzTD/AToSFmRMil18ktIZ4puy3TgMa1RUkIFZ51S4c9JKHRmvhcwx9kWa6YBRYCoBQ5Z7w7BHvt51Koe18n4mDUQwmCN5H4SXu/pfAaKQTZSO0JTyXbE=" id="LPlnk840669" class="">https://mitgcm.readthedocs.io/en/latest/examples/global_oce_biogeo/global_oce_biogeo.html</a>).
The diagnostics that I include are:<br class="">
<br class="">
TRAC01 |SMR MR|mol/m^3 |Dissolved Inorganic Carbon (DIC) [mol C/m^3] concentration<br class="">
ForcTr01|SMR MR|mol/m^3/s |DIC forcing tendency<br class="">
AB_gTr01|SMR MR|mol/m^3/s |DIC tendency from Adams-Bashforth<br class="">
Tp_gTr01|SMR MR|mol/m^3/s |DIC total transport tendency (before gchem_forcing_sep)<br class="">
ADVrTr01|WM LR|mol/m^3.m^3/s |Vertical Advective Flux of DIC<br class="">
ADVxTr01|UU MR|mol/m^3.m^3/s |Zonal Advective Flux of DIC<br class="">
ADVyTr01|VV MR|mol/m^3.m^3/s |Meridional Advective Flux of DIC<br class="">
DFrETr01|WM LR|mol/m^3.m^3/s |Vertical Diffusive Flux of DIC (Explicit part)<br class="">
DFxETr01|UU MR|mol/m^3.m^3/s |Zonal Diffusive Flux of DIC<br class="">
DFyETr01|VV MR|mol/m^3.m^3/s |Meridional Diffusive Flux of DIC<br class="">
DFrITr01|WM LR|mol/m^3.m^3/s |Vertical Diffusive Flux of DIC (Implicit part)<br class="">
<br class="">
DICBIOA | 15 |SM P MR |mol/m3/sec |Biological Productivity (mol/m3/s)<br class="">
DICCARB | 15 |SM P MR |mol eq/m3/sec |Carbonate chg-biol prod and remin (mol eq/m3/s)<br class="">
DICTFLX | 1 |SM P L1 |mol/m3/sec |Tendency of DIC due to air-sea exch (mol/m3/s<br class="">
<br class="">
So far, I managed to close the Tp_gTr01 term with the advective and diffusive flux in the interior to machine precision. However, at the surface there is a large residual, which I am not able to close with ForcTR01. I am wondering if this is a dilution effect
from PTRACER_ref.<br class="">
<br class="">
I am also having a hard time matching Tp_gTr01 and the tendency diagnosed from DIC and Eta snapshots using the GCHEM diagnostics. The GCHEM diagnostics seems to have very small value (10^-10 mol/m^3/s) which is much smalller than the difference.<br class="">
<br class="">
I would really appreciate it if you could tell me whether:<br class="">
<br class="">
1. I am using the correct diagnostics in the correct way;<br class="">
2.there are any model setups that prevent a tracer closure.<br class="">
</span></div>
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<div class="x_x_x_elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt;" class="">Thank you very much!<br class="">
</span></div>
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<div class="x_x_x_elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">
Sincerely,
<div class="">Wenrui</div>
<br class="">
</div>
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;" class="">
<span style="font-size: 16pt; color: rgb(12, 136, 42);" class="">Wenrui Jiang</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;" class="">
<br class="">
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Ph.D. Student,</div>
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Department of Earth & Planetary Sciences,</div>
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Johns Hopkins University.</div>
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<a href="mailto:wjiang33@jh.edu" class="">Email: wjiang33@jh.edu</a></div>
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