We may need to remove carbon from the atmosphere—can the ocean help? Biomass-based marine carbon dioxide removal (mCDR) explores whether natural ocean processes can help store carbon for the long term. Oceanographer and biogeochemist Dr. Morgan Raven explains how organic carbon moves through marine systems, why low-oxygen environments like deep-sea brines and fjords may enable long-term carbon sequestration, and what scientists still need to understand before these approaches can scale. This episode explores marine carbon dioxide removal, carbon sequestration, blue carbon, and ocean biogeochemistry, while addressing uncertainty, environmental risk, and the role these strategies might play alongside emissions reduction. A clear, grounded look at one of the most complex and debated frontiers in climate science.

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Episode Guests: Dr. Morgan Raven

Review Dr. Raven’s publications on Google Scholar

Check out the work of the NOISE Lab

Listen to COP30: Oceans on the Rise? for more on mCDR

10 New Insights in Climate Science for 2025 by Future Earth

Episode Transcript and more information on the Pine Forest Media website

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Hosted, produced, and edited by Clark Marchese

Cover art by Jomiro Eming

Theme music by Nela Ruiz

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