Jonathan Overpeck
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Jonathan Overpeck
@greatlakespecktwo.bsky.social
2.7K followers 540 following 450 posts

Environmental/Climate scientist for 35+ years; NAS Member. Samuel A. Graham Dean, @UMSEAS @UMICH. Tweets my own. Thinking grad school? Join us at @UMSEAS.

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Jonathan Taylor Overpeck is an American climate scientist. Since 2017, he has served as the Samuel A. Graham Dean of the University of Michigan School for Environment and Sustainability. Overpeck has authored more than 220 scientific publications. In 2007, he was a coordinating lead author on a report for the Intergovernmental Panel on Climate Change, which was awarded a Nobel Peace Prize. .. more

Environmental science 48%
Geology 24%
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greatlakespecktwo.bsky.social
Jonathan Overpeck @greatlakespecktwo.bsky.social · 3d
Bad news for large natural carbon sinks: "Our findings suggest the potential for a similar response to climate change by woody aboveground biomass in moist tropical forests globally, which could culminate in a long-term switch from carbon sinks to carbon sources."
www.nature.com/articles/s41...
Aboveground biomass in Australian tropical forests now a net carbon source - Nature
A transition from carbon sink to source for the aboveground woody biomass of moist tropical Australian forests has occurred, driven by increasingly extreme climate anomalies.
www.nature.com

greatlakespecktwo.bsky.social
Jonathan Overpeck @greatlakespecktwo.bsky.social · 3d
Coastal flooding could get much worse: "For a scenario in which emissions keep increasing throughout the twenty-first century, the disappearance of many Antarctic ice shelves could unleash a 10-metre increase in sea levels." www.nature.com/articles/d41...
Most Antarctic ice shelves are set to disappear if greenhouse-gas emissions remain high
The disappearance of many Antarctic ice shelves could lead to a sea-level rise of 10 metres.
www.nature.com

greatlakespecktwo.bsky.social
Jonathan Overpeck @greatlakespecktwo.bsky.social · 3d
Climate change is costing more in terms of lives. "Pollution from wildfire smoke is increasing in the United States. Climate change is projected to exacerbate the problem, leading to 70,000 premature deaths each year by 2050."
www.nature.com/articles/d41...
Wildfire smoke and its harmful effects will worsen with climate change
Excess deaths from wildfire-smoke-derived fine particulate matter could reach 70,000 a year in the United States by 2050.
www.nature.com

Reposted by Peter Thorne, Jonathan Bamber, Tatiana Ilyina , and 1 more

climateofgavin.bsky.social
Gavin Schmidt @climateofgavin.bsky.social · 3d
Finally out! The outcome of a virtual workshop in Feb 2024 with modelers and observationalists to put together data and protocols to include historical changes in ice sheet/ice shelf discharge in CMIP models. Hopefully not too late for some CMIP7 runs!

gmd.copernicus.org/articles/18/...
Datasets and protocols for including anomalous freshwater from melting ice sheets in climate simulations
Abstract. Anomalous freshwater fluxes from the Greenland and Antarctic ice sheets and ice shelves are impacting the surrounding oceans, and we need to be able to account for these effects in climate m...
gmd.copernicus.org

Reposted by Daniela Gabor, Richard S.J. Tol, Joe R. Feagin , and 16 more

davidho.bsky.social
David Ho @davidho.bsky.social · 4d
The US is the world's largest oil and gas producer. Yet, "China is now making more money from exporting green technology than America makes from exporting fossil fuels."
China’s clean-energy revolution will reshape markets and politics
The world’s biggest manufacturer now has an interest in the world decarbonising
www.economist.com

greatlakespecktwo.bsky.social
Jonathan Overpeck @greatlakespecktwo.bsky.social · 22d
Worth a read: "Mike [a leading expert on climate science] describes how his thinking about climate change has evolved—from initial doubt to genuine concern."
revkin.substack.com/p/warming-wo...
Warming Worries of a Once-Doubtful Climate Scientist
Mike Wallace says reality is bad enough. Catastrophe-versus-hoax framing obscures the momentous dangers from unabated greenhouse-gas heating.
revkin.substack.com

greatlakespecktwo.bsky.social
Jonathan Overpeck @greatlakespecktwo.bsky.social · 28d
The Earth has reached its first planetary climate tipping point - a global coral die-off due to rising ocean temperatures. Much marine life depends on functioning coral reefs, so this is scary news for global marine ecosystems and all who depend on them. grist.org/oceans/coral...
Corals are disappearing, pushing Earth to its first major ‘tipping point’
A new report says Earth has reached a dire milestone with the widespread death of warm-water coral reefs. It's not too late to save what remains.
grist.org

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Reposted by Stefan Rahmstorf, Jonathan T. Overpeck

Reposted by Jonathan T. Overpeck

Reposted by Jonathan T. Overpeck

greatlakespecktwo.bsky.social
Jonathan Overpeck @greatlakespecktwo.bsky.social · Oct 3
Global renewable deployments still setting records. www.canarymedia.com/articles/cle...
Chart: Global investment in renewables hits record even as US falters
Over the first six months of this year, a total of $386 billion flowed to renewable-energy projects — 10% more than one year prior.
www.canarymedia.com

greatlakespecktwo.bsky.social
Jonathan Overpeck @greatlakespecktwo.bsky.social · Oct 3
Wildfire risks will keep rising until climate change is stopped. “It is unambiguous and it is clear climate change is playing a role. These aren’t just bigger fires, they’re fires occurring under increasingly extreme weather conditions that make them unstoppable.” www.theguardian.com/world/2025/o...
Wildfires are getting deadlier and costing more. Experts warn they’re becoming unstoppable
Of 200 fires in the past 44 years, half of the fires that cost US$1bn or more were in the last decade
www.theguardian.com