When bio mCDR went too far?

[Greg Rau]

The Overlooked Piece of the Carbon Cycle That Froze the Planet by Silvia Pineda-Munoz, PhD - Climate Ages

“ When all that plankton died, they sank, carrying carbon to the seafloor. Normally, that burial would be good news as it locks carbon away for ages. But in a warmer, busier ocean, oxygen levels plummeted. Low oxygen meant phosphorus wasn’t staying buried; it kept recycling back into the water, fueling yet more plankton blooms.”

GR What I don’t get is how P (and other bio-essential elements?) recycles in the ocean under low O2 while C doesn’t.  Anyway, if P is the key, should we then bulldoze guano off those bird-covered islands (and eliminate fossil fuel use) to save the planet?

[Michael Hayes]

Greg, et al.

Any coastal offshore mixed CDR, SRM, water, energy, nutrient production platform will likely attract lots of sea birds. Getting the birds to roost on them might open up a guano supply. Such a mixed use platform system was proposed by a group of multiple federal agencies around two years ago. 

Yet, here we are.

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[steve.rackley]

If 

{the "offshore mixed CDR, SRM, water, energy, nutrient production platform" is sufficient to "attract lots of sea birds"}

then 

{it seems unlikely that their additional nutrient input will be pivotal.}

endif

[Michael Hayes]

Steve, et al.,

Apologies, I was not claiming that the increased seabird population, due to increased industrial, or mCDR, activity, would be "pivotal" to CDR. I simply pointed out that there would be, beyond any doubt, an increased seabird population around such platforms. 

If multi-purpose mCDR platforms were used as the 'pivotal', or primary, CDR method for ~10 GtC/yr, one could look forward to a robust rebound from the 70% loss of seabirds that we now see, and likely a robust rebound of many of the threatened aquatic surface life in our coastal waters.

Fish Accumulator Devices, or anchored rafts, are one of the earliest known forms of community scale fishing, and FADs are also currently being used to help stop large drag net ships from raping traditional coastal fishing grounds off of Somalia and other sites.

The concept of a global scale deployment of mCDR qualified water/ energy/nutrient production FADs is not simple, yet I'm far from the first to propose it. Last year, at this time of year, most federal agencies were directed to make it happen. 

Best regards

 

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[Brian Cady]

Greg Rau and all,

I believe that phosphorus in anaerobic, extremely electronegative sediments, forms PH3, phosphine, a gas. Phosphine gas can and often does bubble up, supplying phosphorus to aerobic surface waters, stimulating productivity.
Related articles:
https://www.sciencedirect.com/science/article/abs/pii/S004896971834926X
https://pmc.ncbi.nlm.nih.gov/articles/PMC4217446/
https://www.sciencedirect.com/science/article/abs/pii/S0048969700003685

https://d1wqtxts1xzle7.cloudfront.net/80785554/d7b41b8fead8877e10ebc7e54e9b812a99d4-libre.pdf

https://www.sciencedirect.com/science/article/abs/pii/S0043135424005402

https://www.researchgate.net/publication/347408563_Global_phosphorus_dynamics_in_terms_of_phosphine

https://www.sciencedirect.com/science/article/abs/pii/S0960852401000323

Brian

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