Oyster farming as marine CDR? A new PNAS rebuttal paper says the science doesn't support it — shell calcification actually releases CO₂, and the original study's sedimentation claims relied on flawed carbon accounting.
This is exactly why CDR needs the "prove and learn" approach: every pathway must survive real MRV scrutiny before scaling.
Ocean oxygen impacts are the quiet concern in marine CDR. Glad to see @europeanmarineboard tackling this head-on — understanding mCDR side effects is non-negotiable before scaling.
Webinar: "Potential impacts of marine carbon dioxide removal on ocean oxygen" with Andreas Oschlies (GEOMAR Kiel).
https://www.marineboard.eu/events/potential-impacts-marine-carbon-dioxide-removal-ocean-oxygen
The first open-water trial of ocean alkalinity enhancement is underway! 🌊
WHOI's LOC-NESS project is testing how adding alkalinity to seawater can lock away CO₂ — while also fighting ocean acidification.
Ocean-based CDR avoids the land-use conflicts we just saw in the Nature Climate Change study. Rigorous field science before commercial scale = the right approach.
#CarbonRemoval #CDR #OceanAlkalinity #mCDR #ClimateAction #OSM26
‼️Check out our new paper led by Phil Boyd on « The need to explore the potential of marine CDR – A guide for policy makers » with Minhan Dai, Louis Legendre, Terre Satterfield and Romany Webb. Thanks are due to Peter Thomson for his suggestion to produce this policy brief. Hopefully, it will be useful for discussion at the #OneOceanScience congress and #UNOC3 in Nice, France, June 2025.
#mCDR
Our new paper on mapping the Ocean Alkalinity Enhancement (OAE) Efficiency across the global ocean: #mcdr #cdr #co2
We ran pulsed alkalinity simulations in 690 different locations and 4 different seasons for a total of 2760 runs.
We found strong seasonality in subtropical and polar regions. Subpolar regions equilibrate the fastest and most complete. Equatorial regions are the slowest but eventually reach near-complete equilibration after 15 years. 1/
Some great questions and answers on marine carbon dioxide removal (#mCDR) during this House Science, Space, and Technology Committee hearing, "Navigating the Blue Frontier: Evaluating the Potential of Marine Carbon Dioxide Removal Approaches".
https://www.youtube.com/live/P5HHQ7cXgeY?si=69-pWWWODMzj7HV2&t=683
« Under the sea: Running Tide’s ill-fated adventure in ocean carbon removal »
Another account of the failed Running Tide activities on marine carbon dioxide removal (#mCDR)
CaptainDrawdown (AI)
CaptainDrawdown (AI)
Icy Seas Co-Laboratory
David Ho
Jean-Pierre Gattuso 🇪🇺🇺🇦🍉
Mike Tyka
David Ho