[MITgcm-support] MITgcm-support Digest, Vol 215, Issue 4

[Weiyang Bao]

Hi Jean-Michel,

I have a follow-up question for modifying the tracer. Thanks to your suggestion, I managed to generate the time-evolving tracer at selected model domain by changing the tendency term in the ptracers_apply_forcing.F code. If I want to have the other time-continuous tracer in the same domain at the same time, is the forcing subroutine capable of doing so? Will I need a separate run for this tracer or the RBCS package could help? Thank you in advance!

Best, Weiyang
On May 14, 2021, 12:00 PM -0400, mitgcm-support-request at mitgcm.org, wrote:
> Send MITgcm-support mailing list submissions to
> mitgcm-support at mitgcm.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mailman.mitgcm.org/mailman/listinfo/mitgcm-support
> or, via email, send a message with subject or body 'help' to
> mitgcm-support-request at mitgcm.org
>
> You can reach the person managing the list at
> mitgcm-support-owner at mitgcm.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of MITgcm-support digest..."
>
>
> Today's Topics:
>
> 1. Time-Varying Ptracer Concentration (Weiyang Bao)
> 2. Re: Time-Varying Ptracer Concentration (Jean-Michel Campin)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 13 May 2021 20:39:06 -0400
> From: Weiyang Bao <wbao at udel.edu>
> To: mitgcm-support at mitgcm.org
> Subject: [MITgcm-support] Time-Varying Ptracer Concentration
> Message-ID: <d2907a92-97d6-41e1-b925-839a3bb7da28 at Spark>
> Content-Type: text/plain; charset="utf-8"
>
> Dear MITgcm users,
>
> I?m trying to introduce two passive tracers at a selected region of my coastal model domain. In order to estimate the ?age? (time elapsed) of the tracer since it was introduced, one of the tracers need to have a steady input with a concentration say 1, the other tracer should have a concentration that grows at a known rate, say 1, 2, 3,? at time 1, 2, 3,? and the ratio of these two tracers can be used to estimate. I?ve figured out using the RBCS package to relax the first tracer and maintain a continuous concentration of unity, but not sure how to generate the time-varying (or linearly increasing) concentration for the second tracer. It will be much appreciated if you could share some ideas.
>
> Thanks for your time,
>
> Weiyang
>
> Weiyang Bao
> Ph.D. Candidate, Physical Ocean Science and Engineering
> School of Marine Science and Policy
> University of Delaware
> wbao at udel.edu
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20210513/db9f189e/attachment-0001.html>
>
> ------------------------------
>
> Message: 2
> Date: Fri, 14 May 2021 00:25:05 -0400
> From: Jean-Michel Campin <jmc at mit.edu>
> To: mitgcm-support at mitgcm.org
> Subject: Re: [MITgcm-support] Time-Varying Ptracer Concentration
> Message-ID: <20210514042505.GA24091 at ocean.mit.edu>
> Content-Type: text/plain; charset=us-ascii
>
> Hi Weiyang,
>
> May I suggest to take a look in verification/tutorial_global_oce_latlon/code
> where the 2 ptracers forcing subroutines have been modified to simulate
> a surface age tracer: concentration relaxed to zero at the surface but increasing
> with time (source term equal to unity) everywhere else.
>
> This is not exactly what you are looking for but could be a good starting point
> to get the correct modified code for your second tracer.
>
> Cheers,
> Jean-Michel
>
> On Thu, May 13, 2021 at 08:39:06PM -0400, Weiyang Bao wrote:
> > Dear MITgcm users,
> >
> > I???m trying to introduce two passive tracers at a selected region of my coastal model domain. In order to estimate the ???age??? (time elapsed) of the tracer since it was introduced, one of the tracers need to have a steady input with a concentration say 1, the other tracer should have a concentration that grows at a known rate, say 1, 2, 3,??? at time 1, 2, 3,??? and the ratio of these two tracers can be used to estimate. I???ve figured out using the RBCS package to relax the first tracer and maintain a continuous concentration of unity, but not sure how to generate the time-varying (or linearly increasing) concentration for the second tracer. It will be much appreciated if you could share some ideas.
> >
> > Thanks for your time,
> >
> > Weiyang
> >
> > Weiyang Bao
> > Ph.D. Candidate, Physical Ocean Science and Engineering
> > School of Marine Science and Policy
> > University of Delaware
> > wbao at udel.edu
>
> > _______________________________________________
> > MITgcm-support mailing list
> > MITgcm-support at mitgcm.org
> > http://mailman.mitgcm.org/mailman/listinfo/mitgcm-support
>
>
>
> ------------------------------
>
> Subject: Digest Footer
>
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mailman.mitgcm.org/mailman/listinfo/mitgcm-support
>
>
> ------------------------------
>
> End of MITgcm-support Digest, Vol 215, Issue 4
> **********************************************
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20210520/7caa9775/attachment.html>