
Jonathan Cohler: “ Fossil fuel combustion drove essentially none of the atmospheric CO2 growth” #427
Tom NelsonShow Notes
Jonathan Cohler presents a newly submitted paper using mass conservation, isotopic signatures (delta 13C), and multiple datasets to apply the Keeling relation and infer a consistent intercept near -13.2‰ across sites and time spans. He argues this makes fossil fuels (signature ~-28‰) at most 26% of net atmospheric CO2 change and, using preindustrial constraints, essentially ~0–1.3%, contradicting claims by IPCC, NASA, NOAA, EPA, and the CO2 Coalition. He says CO2 residence time is ~3.8 years and attributes rising CO2 to natural temperature-driven ocean/soil outgassing. He criticizes the CO2 Coalition for conflating accounting identities with causation, describes harassment, and says he resigned.
00:00 New Paper Claim 01:29 Three Inputs Setup 03:25 Isotope Signatures 101 06:05 Keeling Relation Explained 10:17 Datasets And Intercepts 13:38 Solving For Fossil Fraction 22:22 Why Fossil Dominance Fails 25:16 Rejecting The Conclusion 28:04 Carbon Cycle Turnover 31:45 What Drives CO2 Rise 33:56 Ancient CO2 And Whataboutism 36:53 CO2 Coalition Errors Teaser 37:38 Accounting vs Causation 39:23 Feynman on Conservation 40:37 What Proves Causality 41:37 Atmospheric Balance Equation 42:53 Coalition Paper Misreads 46:25 Molecules Not Labeled 48:08 Residuals Aren't Attribution 49:56 Isotopes Discriminate Sources 51:27 Airborne Fraction Fallacy 53:41 Retention and Cycle Time 56:02 Harassment and Resignation 01:03:18 CO2 Forcing and Policy Costs 01:08:51 X Feedback and Contact 01:13:38 Wrap Up and Links
https://x.com/cohler https://papers.jcohler.com/ ========= Slides, summaries, references, and transcripts of my podcasts: https://tomn.substack.com/p/podcast-summaries My Linktree: https://linktr.ee/tomanelson1
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