Schlagwort: ocean-based CDR

Vibbert & Park (2022): Harvesting, storing, and converting carbon from the ocean to create a new carbon economy: Challenges and opportunities

Hunter B. Vibbert & Ah-Hyung Alissa Park IN: Front. Energy Res., Sec. Carbon Capture, Utilization and Storage,

In this perspective article, the authors discuss alkalinity enhancement and biologically inspired CO2 hydration reactions that can shift the equilibrium of ocean water to pump more carbon into this natural sink. Further, they highlight recent work that can harvest and convert CO2 captured by the ocean into chemicals, fuels, and materials using renewable energy such as off-shore wind.


Biennial Ocean Visions Summit & Call for abstracts

April 4-6, 2023, at the Georgia Aquarium in Atlanta or online

„Summit participants will share and discuss cutting-edge advancements in ocean sciences, engineering, policy, governance, and economics that support trajectory-changing solutions to the dangerous climate impacts on the ocean within 7-10 years.“

Ocean Vision is currently soliciting abstracts. Abstracts should focus on existing and emerging problems at the intersection of the ocean and climate crises, and current and potential solutions that can be effectively implemented – as well as anticipating newer problems as these crises intensify. Abstracts should fall within one or more of the five program tracks:

  • Ocean-Based Contributions to Global Decarbonization
  • Ocean-Based Contributions to Carbon Dioxide Removal
  • Ocean Ecosystem Regeneration
  • Human Adaptation to a Changing Ocean
  • Building a Global Community of Solvers at the Ocean-Climate Nexus

The deadline for submitting abstracts is October 26, 2022. The full meeting program and schedule will be published in early February.


Kludze et al. (2022): Biocement from the Ocean: Hybrid Microbial-Electrochemical Mineralization of CO2

Atsu Kludze, Devan Solanki, Marcelo Lejeune, Rito Yanagi, Momoko Ishii, Neera Raychaudhuri, Paul Anastas, Nanette Boyle, Shu Hu IN: iScience, 105156,

This work discusses a hybrid method that combines primary production via the growth of autotrophic microorganisms (i.e., photosynthetic cyanobacteria) and microbially-induced carbonate precipitation. Carbon fixation and carbonate precipitation can be co-optimized by using bipolar membrane electrodialysis devices (BPMEDs), which generate seawater with adjustable pH. The authors examine the scale-up potential for naturally produced bio-carbonate composite materials and compare its production with published ocean CDR strategies for reducing anthropogenic CO2 emissions.


Ocean Visions Summit 2023: Innovating Solutions at the Ocean-Climate Nexus

April 4-6, 2023, in Atlanta, Georgia

The next Ocean Visions Summit will be held from April 4-6, 2023, in Atlanta, Georgia. This will predominantly be an in-person event, but with a modified virtual component. Contributions to the Summit program can be made by applying to chair a session within one of the five tracks: 1) Ocean-Based Contributions to Global Decarbonization, 2) Ocean-Based Contributions to Carbon Dioxide Removal, 3) Ocean Ecosystem Regeneration, 4) Human Adaptation to a Changing Ocean, and 5) Building a Global Community of Solvers at the Ocean-Climate Nexus. Applications should be submitted by 9/30/2022, Ocean Visions will notify candidates by 10/21/2022.


Wallmann et al. (2022): Erosion of carbonate-bearing sedimentary rocks may close the alkalinity budget of the Baltic Sea and support atmospheric CO2 uptake in coastal seas

Klaus Wallmann, Markus Diesing, Florian Scholz, Gregor Rehder, Andrew W. Dale, Michael Fuhr, Erwin Suess IN: Front. Mar. Sci., Sec. Coastal Ocean Processes,

The authors investigate the alkalinity budget of the Baltic Sea to identify previously unrecognized alkalinity sources. They quantify the generation of alkalinity and dissolved calcium (Ca) in this marginal sea applying simple mass balance calculations. Using this approach, the authors identify alkalinity and Ca sources of approximately 324 Gmol yr-1 and 122 Gmol yr-1, respectively, that cannot be ascribed to the riverine input.


„This Startup Is Enhancing the Ocean’s Ability to Store Carbon, Reversing Acidification“

by Scarlett Buckley on

„Ebb Carbon’s pioneering carbon-removal technology combines with electrochemistry to accelerate the ocean’s natural process of carbon removal, safely storing it for 10,000+ years, whilst simultaneously reducing ocean acidity […] The electrochemical process works by intercepting the saltwater that saltwater-treating facilities deposit back into the ocean and adjusting the electricity of its molecules — the salt and water molecules in saltwater are rearranged to produce acid and slightly alkaline saltwater solutions. When this alkaline saltwater returns to the ocean, a natural chemical reaction occurs — and CO2 is pulled out of the air and stored as bicarbonate.“


Connelly et al. (2022): Assuring the integrity of offshore carbon dioxide storage

D.P. Connelly, J.M. Bull, A. Flohr, A. Schaap, D. Koopmans, J.C. Blackford, P.R. White, R.H. James, C. Pearce, A. Lichtschlag, E.P. Achterberg, D. de Beer, B. Roche, J. Li, K. Saw, G. Alendal, H. Avlesen, R. Brown, S.M. Borisov, C. Böttner, P.W. Cazenave, B. Chen, A.W. Dale, M. Dean, M. Dewar, M. Esposito, J. Gros, R. Hanz, M. Haeckel, B. Hosking, V. Huvenne, J. Karstens, T. Le Bas, T.G. Leighton, P. Linke, S. Loucaides, J.M. Matter, S. Monk, M.C. Mowlem, A. Oleynik, A.M. Omar, K. Peel, G. Provenzano, U. Saleem, M. Schmidt, B. Schramm, S. Sommer, J. Strong, I. Falcon Suarez, B. Ungerboeck, S. Widdicombe, H. Wright, E. Yakushev IN: Renewable and Sustainable Energy Reviews 166:112670; DOI:10.1016/j.rser.2022.112670

The public must be assured that potential leakages from storage reservoirs can be detected and that therefore the CO2 is safely contained. The authors conducted a controlled release of 675 kg CO2 within sediments at 120 m water depth, to simulate a leak and test novel detection, quantification and attribution approaches. The authors show that even at a very low release rate (6 kg day⁻¹), CO2 can be detected within sediments and in the water column. Alongside detection the authors show the fluxes of both dissolved and gaseous CO2 can be quantified. The CO2 source was verified using natural and added tracers. The experiment demonstrates that existing technologies and techniques can detect, attribute and quantify any escape of CO2 from sub-seabed reservoirs as required for public assurance, regulatory oversight and emissions trading schemes.


Can oceans save us? Part I: Using oceans to pull more CO2 from the air

w/ Mowgli Holmes, Greg Rau, and James Lindsay hosted by Wil Burns and James Lawler on

Climate Now produced a special three-part podcast series that explores a novel suite of technologies, termed Ocean CDR, that aims to speed up Earth’s natural GHG regulator by enhancing the biogeochemical processes already happening in the oceans. In the first episode (27 min), a suite of entrepreneurs talk who see the climate-saving and profit-making potential of Ocean CDR, who show what these technologies are, how they work, and why they could be so valuable to mitigating climate change.


Do oceans absorb more CO2 than expected?

by Torsten Fischer on

„Scientists developed a new model that includes the vertical migration of phytoplankton and can thus calculate the active „pumping up“ of nutrients. According to the calculations of the team of authors, by 2100 about 40 gigatons more CO2 per year would be absorbed than current climate models predict. This corresponds to sixty times the carbon emissions of Germany and thus roughly 10% of our carbon budget. That would significantly adjust the world’s climate account upward. For this, however, it is necessary to know about essential processes, including the behavioral patterns of microorganisms. The verification of the new study’s theory (published in Nature Climate Change) could make a decisive contribution to this.“