Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
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SCIENCE

The Claim

The ocean stores more carbon than the atmosphere.

Verified by Lenz ·

The Short Version

The scientific evidence shows the ocean holds far more carbon than the atmosphere. Standard carbon-cycle estimates put ocean carbon at roughly 38,000 gigatons of carbon, compared with about 800-900 gigatons in the atmosphere. Caveats about deep-ocean storage or exchange rates do not change the basic comparison the claim makes.

Caveats

  • Most ocean carbon is stored as dissolved inorganic carbon, much of it in the deep ocean rather than in a rapidly exchangeable surface pool.
  • The ocean is the largest active carbon reservoir, but not the largest carbon reservoir on Earth overall; sedimentary rocks store far more.
  • Exact inventory estimates vary somewhat by source and year, but the gap is so large that the claim remains clearly correct.

The Receipts

  1. Climate Change 2021: The Physical Science Basis

    IPCC

  2. Ocean Carbon Uptake

    Pacific Marine Environmental Laboratory

  3. AR6 WGI Chapter 5: Global Carbon and other Biogeochemical Cycles and Feedbacks

    IPCC

  4. Special Report on Carbon Dioxide Capture and Storage – Chapter 6: Ocean Storage

    IPCC

  5. Oceans absorb 30% of our emissions, driven by a huge carbon sink

    CSIRO

  6. Uptake and Storage of Carbon Dioxide in the Ocean

    Oceanography (The Oceanography Society)

  7. Dissolved Inorganic Carbon Storage in Oceans v1.0

    Isometric

  8. CO₂ reservoir

    World Ocean Review

  9. Ocean Carbon Dioxide Removal and Storage

    NIH / PubMed Central

  10. Carbon Cycle

    Woods Hole Oceanographic Institution

+ 6 more sources — see the full list on Lenz

Filed Under

AtmosphereCarbonocean

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