Dave Bonan

@davebonan.bsky.social

I study the processes governing Earth's climate system and how it changes. www.davebonan.com

Bordeaux, France, has now recorded more days above 40°C in 2026 alone than during the entire 105-year period from 1920 (when observations began) to 2025. This is deeply shocking.

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New paper out in @pnas.org: this year’s western U.S. snow conditions were pretty dismal, but to what extent was this snow drought due to climate change?  Paper: www.pnas.org/doi/10.1073/... (with Marianne Cowherd, Stefan Rahimi, Yuhong Ye) Thread:👇

PNAS

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

pnas.org

With all the July model runs now in, it is very likely that 2026 will see the largest El Niño event since records began in the late 1800s – and potentially by a truly mind-blowing margin. The median estimate is now 3.6C, roughly 0.8C hotter than the prior record (2.75C). www.theclimatebrink....

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I'm excited to share that I'll be joining the @csuatmossci.bsky.social as an Assistant Professor in Jan. 2027. Interested in research on the physics and dynamics of Earth's climate? Please reach out! If you don't know Fort Collins, here's The Diamond on Longs Peak at sunrise, as seen from the city.

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A balanced take on a nuanced subject, providing a clear summary of the current state of AMOC research and many of the discussions from a workshop in the UK last week. The idea of a more resilient AMOC is consistent with some of our theoretical work on future AMOC changes: rdcu.be/eoqVt

Observational constraints imply limited future Atlantic meridional overturning circulation weakening

Nature Geoscience - Observational constraints, along with a better understanding of climate model behaviour, suggest that the projected weakening of the Atlantic meridional overturning circulation...

rdcu.be

Paul Voosen@voosen.me · 2mo ago

It's out. My latest feature for @science.org, from aboard the RRS Discovery: a deep look at the past, present, and future of AMOC, told through the RAPID program. AMOC is weakening -- maybe, probably. But it also may be more resilient than some have made it seem.