Henrik Svensmark: Cosmic Rays, Clouds and Climate



In this in-depth conversational interview and discussion, Professor Henrik Svensmark (formerly of Danish National Space Center) explains his groundbreaking research on how galactic cosmic rays influence cloud formation and climate.

Joined by Dr. Willie Soon and Dr. Ronan Connolly (CERES), Svensmark discusses:

    • The physical mechanism linking cosmic rays → ionization → aerosols → cloud condensation nuclei
    • Laboratory experiments and natural experiments (Forbush decreases)
    • Why IPCC climate models struggle with clouds (grid size & parameterization)
    • The CERN CLOUD experiment and the challenges of independent research
    • Longer-term galactic drivers as the Solar System passes through the Milky Way’s spiral arms
    • Svensmark’s personal reflections on the challenges of independent research, including his recent firing from the Technical University of Denmark (DTU).

This is a rare, candid and in-depth conversation with one of the leading researchers in solar-climate science.

Recorded 26th June 2026, Halle an der Saale, Germany (at the 17th EIKE climate change and energy conference). Also watch this related video below:

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