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Seeding the ocean with iron had previously been suggested for carbon sequestration as well https://edu.rsc.org/feature/iron-ocean-seeding/2020176.article https:

• _3u10 5y ago
  I believe the numbers work out to sequestering 1/3rd of CO2 output for around $4 billion per year and creating hundreds of billion in fish as well as untold benefits for the ecosystem
• gscott 5y ago
  Canadian tribes have tried it https://www.q13fox.com/news/canadian-tribes-ocean-fertilization-project-attempts-to-boost-salmon-population https://www.q13fox.com/news/canadian-tribes-ocean-fertilizat...
• beloch 5y ago
  Would having more whales boost CO2 sequestration, or just increase the ammount tied up in the oceans at any given time? If the former, gradual seeding could leave a persistent effect behind in the form of increased whale populations. Seeding wouldn't just be a one-time exchange of money for CO2 sequestration.
  • goda90 5y ago
    Doesn't carbon get sequestered on the ocean floor quite a bit? I imagine more in the ocean would mean more getting trapped in the ocean floor.
    • ruined 5y ago
      limestone is the largest carbon reservoir in the world, storing about 80% of all the world's carbon, and nearly all limestone is former marine organisms. organisms like krill that now have difficulty accreting carbonate structure and surviving due to the increased co2 acidity of the oceans :D