📄 PREPRINT 🌊

New preprint in Biogeosciences. Long MS, sorry, but cool concepts (CAP, alkalinity stability, and CO2 uptake rates at low open ocean wind speeds). Now hoping the reviewers will be as excited about the results as I am!

Read it? Let me know your thoughts!

doi.org/10.5194/egus...

What works in the ocean may not work in soils.
Our new paper shows that total alkalinity titrations—robust in seawater—can be misleading in soils due to organic alkalinity.
We argue that charge-balance & cation-based accounting may be more robust for terrestrial CDR.
doi.org/10.5194/bg-2...

  We specialize in removing crushed chalk dust from sidewalks and synthetic turf surfaces. Our synthetic turf cleaning service in Hermosa Beach, California, uses alkalinity mapping and pH-control https://briteturf.com/Top-Synthetic-Turf-Cleaning-Service-Hermosa-Beach-California-Clear-Chalk-Dust.html

Extremely insightful and complex study on ocean alkalinity enhancement under different future emission scenario. Congratulations to @jhauck.bsky.social and team. This is a great primer for many of the things we plan to elaborate further in #OAEMIP.

This isn’t theory. It’s measurable geochemistry – isotope fingerprints, total alkalinity in leachate, mineral depletion analyses, and time-series soil and pore-water sampling. Together, these methods produce a defensible carbon number that independent registries can verify.

Sprinkle fireplace ash into the bottom of your trash can to leave it smelling fresh, as the alkalinity means it will cling to moisture and absorb bad smells.

Alkalinity is a little low.

A comparison between alkalinity in the ocean and in soils, led by Jelle Bijma, motivated by enhanced weathering as a carbon dioxide removal method.

🌊

bg.copernicus.org/articles/23/...

We can essentially predict 🌊ocean CO2 uptake and atm CO2 reduction based on amount of alkalinity added (R2 > 0.98). Of course, some processes are missing in all models, and this will be very different for the first 1-2 decades of the simulation as we illustrate with the large ensemble spread.

6/end

Do you think there is a lot of spread between 🌊 models when simulating alkalinity enhancement?

After decade long simulations, there is astonishingly little spread between models, irrespective of their choice of scenario and regional deployment mask.

5/x

- The feedbacks in the ESM make that efficiencies are smaller than in ocean-only or concentration-driven simulations and lead to high uncertainties in the first one or two decades. That will be a real challenge for monitoring.

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🌊 New ocean alkalinity enhancement paper out, led by @tanvi05.bsky.social:

We conducted global and regional (subduction regions) alkalinity enhancement simulations in the emission-driven AWI-ESM.

Key findings are ...

shorturl.at/9Cz5r @miriamseif.bsky.social @awi.de @cdrmare.bsky.social

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Biomarker δ13C values record consistent savanna vegetation and variable alkalinity of Lake Olduvai during Pleistocene wet/dry cycles | PNAS www.pnas.org/doi/10.1073/... #stableisotopes

Very happy to welcome Dr Abby Guo to our group today as a postdoc. She will be using data from China's largest Ocean Alkalinity Enhancement trials to understand how well the concept works as a C sink and what the potential side-effects are on marine ecosystems 🌊

www.hopwood-marine-science.com/about

Some posts about doing science, as we do.