Tom Nelson

Joseph Fournier: “Solar-Driven Glacial Atmospheric Dipole” | Tom Nelson Pod #404

Tom Nelson

Show Notes

Joseph Fournier discusses his Substack article proposing a “solar-driven glacial atmospheric dipole” to explain the Last Glacial Maximum contrast between ice-covered North Atlantic regions and ice-free Beringia. He reviews Milankovitch cycles, zonal vs meridional winds, ITCZ migration, Holocene aridity/desert formation around 4,200 years ago, and Neoglacial solar sensitivity. He focuses on how solar variability (UV, interplanetary magnetic field, energetic particle precipitation, cosmic rays) affects stratospheric polar vortices and couples to tropospheric indices (NAO, SAM), influencing clouds, sunshine, ocean circulation (AMO/AMOC), and glaciers, citing proxy reconstructions and Bond events. They also address the Atlantic “cold blob” freshwater argument and farming implications.

00:00 Beringia Glacial Mystery 02:35 Dedication and Wind Focus 06:08 Holocene ITCZ Shifts 10:21 Deserts and Neoglacial Questions 15:02 Milankovitch Limits 17:22 Zonal vs Meridional Flow 22:09 Southern Annular Mode Basics 25:12 SAM Impacts and Ocean Carbon 28:48 Cloud Belts and Brightening 34:32 SAM History and Solar Minima 38:12 Polar Vortex Coupling 40:17 Solar Magnetism Explained 45:18 GCRs and Stratosphere Temps 52:01 Sunspots vs Hurricane Power 56:01 EPP Ozone and Aurora Link 58:36 Solar System Harmonics 01:01:02 Solar Wobble Link 01:02:34 Jupiter Quakes Core 01:06:41 Zonal vs Meridional 01:11:32 NAO SPV Coupling 01:14:21 Bond Events Framework 01:17:42 Ice Rafted Debris 01:25:26 Greenland Melt Drivers 01:30:38 AMO Gulf Stream THC 01:37:10 Cosmogenic Isotope Cycles 01:42:34 Glacial Dipole Conclusion 01:45:46 Atlantic Cold Blob 01:49:13 Farming Outlook Wrap

https://x.com/JosephF55175005 ========= 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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