Carbon sequestration and trackAtomicRatio

[Vidette McGregor]

Hi Atlantis team

 

Has anyone used their Atlantis model to explore scenarios looking at carbon sequestration?

 

I’m wondering if this is a.) do-able in an Atlantis model; b.) would require turning on ‘trackAtomicRatio’; c.) if we could proxy this by converting nitrogen using species-specific nitrogen to carbon ratios, probably external to the Atlantis model.

 

The trackAtomicRatio option seems to be quite an undertaking, although I’m keen to hear if anyone has experience with turning this on.

 

Best wishes,

Vidette

Dr Vidette McGregor Ecosystem Modeller +64-4-386-0851 National Institute of Water & Atmospheric Research Ltd (NIWA) 301 Evans Bay Parade Hataitai Wellington New Zealand Connect with NIWA: niwa.co.nz Facebook LinkedIn Twitter Instagram YouTube

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[Robert Wildermuth]

Hi Vidette,

I’ve been interested in doing this for our California Current model. We’ve only gone as far as discussions, but Isaac seemed to think it was doable using the Redfield ratio, similar to your option (c). This would be a more coarse approach than you suggest, but maybe worth a quick stab before making code edits.

I have a feeling any worth-while effort at looking at carbon “sequestration” will require a good look at carbonate specifications and particulate sinking rates, likely beyond the defaults, and possibly more related to the hydrology model providing inputs rather than Atlantis itself. My initial curiosity was limited to “storage” in living biomass, which would be a rough calculation (hopefully) possible from Atlantis as specified.

Happy to brainstorm further, though I’m in the field so it may need to wait ’til October.

Best,

Robert

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[Vidette McGregor]

Hi Robert

 

Thanks for the prompt response!

 

I’m in the fairly early stages of thinking about this, so some time in October would be good timing to brainstorm this idea further.

 

I hadn’t really thought about the particulate sinking rates. Possibly the physics.prm file is worth a closer look too. We’re also interested in exploring the effects of destructive fishing methods (e.g., trawling, dredging) on carbon in the sediments, although this might be a bit more ambitious. The storage in living biomass is possibly easier to get to in Atlantis – and you’re right, starting with something that is relatively quick before delving into code changes makes sense!

 

Cheers,

Vidette