[MITgcm-support] Adding Biogeochemistry (BGC) Cost/Objective Function

[Yohei Takano - BAS]

Dear all,

   I am trying to add new cost/objective function within pkg/ecco framework following the
ptracer example from the codes. For the bgc objective function, I am thinking of introducing
air-sea co2 flux, pco2 (DIC and BLING package), chlorophyll (BLING package)  for example and
now working on air-sea co2 flux in DIC package as a starter.

   In the end, I have modified "cost_gencost_customize.F", "ecco_phys.F", and "ecco_check.F"
codes to include  "m_DICCFLX" and "m_boxmean_DICCFLX" for gencost bar file and manage to
compile and run the model. However, the adjoint part of the simulation does not generate any
ADJ* file (adxx_* files are generated, I still need to check the output) and I am wondering if I need
to change other part of the code to include this such as codes in pkg/autodiff. Here I am thinking of
the default ADJ* files (such as taux, temperature etc. common for other adjoint simulations)
not something new. The costfunction0012 contains values so I think it is defining the objective function okay,
just the output behaviour is different from what I expected from other runs.

   In the end I understand I should separate bgc from physics (i.e. not to include in "ecco_phys.F") but
just for a starter I am starting from modifying the existing codes. I am running the model for 2 years
the adjDumpFreq    = 1209600.0, so I am expecting to have ADJ* output every two weeks.

   Is there any other part of the codes/pkg I need to update (or missing some settings)?
Any comments, suggestions will be great.

Thank you,

Yohei




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