[MITgcm-support] MITgcm-support Digest, Vol 225, Issue 7

[Remya]

Hi Matthew,

                       What you said is correct, biomass is the 9th tracer,
unless silicate (define USE_SIBLING in BLING_OPTIONS.h) is activated. In my
case silicate is the 9th tracer and biomass 10th. I am attaching
BLING_OPTIONS.h, data.ptracers, data.bling from my model setup. If anything
is required please let me know.

Remya

On Sat, Mar 19, 2022 at 2:17 AM <mitgcm-support-request at mitgcm.org> wrote:

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>    1. Re: Issue with nitrate and total phytoplankton biomass in
>       BLING (Matthew Mazloff)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 18 Mar 2022 08:18:46 -0700
> From: Matthew Mazloff <mmazloff at ucsd.edu>
> To: mitgcm-support at mitgcm.org
> Subject: Re: [MITgcm-support] Issue with nitrate and total
>         phytoplankton biomass in BLING
> Message-ID: <780354F4-9F06-4D1C-9436-68F5370AFF44 at ucsd.edu>
> Content-Type: text/plain;       charset=us-ascii
>
> Hi Remya
>
> For bling with ADVECT_PHYTO I think biomass is the 9th tracer. Is this the
> issue? What is your 9th tracer? It's important to order data.ptracers
> correctly.
>
> I think I need more information about your setup.
>
> Matt
>
>
> > On Mar 18, 2022, at 1:08 AM, Remya <remyceas at gmail.com> wrote:
> >
> > Dear all,
> >
> >                   I am running BLING coupled to the MITgcm model. Among
> the tracers I am facing issues with simulating nitrate and total biomass
> correctly. I have defined ADVECT_PHYTO to initialize total phytoplankton
> biomass as 10th tracer instead of different phytoplankton components
> (Small, large, diazotrophs). The model is using a fraction of initial
> biomass to compute three phytoplankton components initially. In the source
> code bling_bio_nitrogen.F, the total phytoplankton biomass is computed and
> updated as the sum of three phytoplankton components. Total biomass = small
> + large + diazotrophs. However the output I am getting for nitrate and
> biomass is not at all comparable with other datasets. When I computed
> offline the sum of small, large, diazotrophs, it is not the same as total
> biomass. Chlorophyll is simulated somewhat correctly. Also changing nitrate
> concentration does not seem to have much impact on total phytoplankton
> biomass. Please provide suggestions to improve the
>  model simulation to get better nitrate and biomass.
> >
> > Remya.R
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> End of MITgcm-support Digest, Vol 225, Issue 7
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