A Natural Experiment in the Sky: Shipping, Clouds, and Climate episode artwork

EPISODE · Apr 21, 2026 · 56 MIN

A Natural Experiment in the Sky: Shipping, Clouds, and Climate

from Oceanography

Cleaner ship fuel created a climate experiment. Meteorologist Dr. Michael Diamond explains how shipping emissions influence cloud formation above the ocean and how the IMO sulfur cap changed that signal. Combined with disruptions to major shipping routes, the policy gave researchers a rare natural experiment for studying aerosols, clouds, and climate. The results also inform current questions about marine cloud brightening without turning past pollution into an argument for deployment.Support our science communication directly by donating to Pine Forest Media or directly on PayPalEpisode Guests: Dr. Michael DiamondFind Dr. Diamond’s published article on the impacts of the IOM regulation and preprint on the impacts of a changed shipping route. Review Dr. Diamond’s publications on Google ScholarListen to Pine Forest Media’s NEWEST PODCAST GREEN FREQUENCYEpisode Transcript and more information on the Pine Forest Media websiteFollow Pine Forest Media on Instagram @pineforestmediaHosted, produced, and edited by Clark Marchese Cover art by Jomiro EmingTheme music by Nela RuizFind some more Pine Forest Media podcasts belowListen to Plastic Podcast on Spotify or Apple PodcastsListen to South Pole on Spotify or Apple PodcastsListen to Something in the Water on Spotify or Apple Podcasts Hosted on Acast. See acast.com/privacy for more information.

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A Natural Experiment in the Sky: Shipping, Clouds, and Climate

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