Jonathan Overpeck

Jonathan Overpeck

@greatlakespecktwo.bsky.social

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

3,056 Followers 545 Following 578 Posts Joined Nov 2024
9 hours ago
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Compound atmospheric and marine hot extremes coupled with droughts in Madagascar Madagascar is the fourth largest island, bursting with vast biodiversity as well as unique and plentiful natural resources. However, it is also one of…

The majority of countries in the world are seeing - or soon will see - more devastating drought as the planet warms. Especially bad in many low-income countries that didn’t contribute to the warming.

www.sciencedirect.com/science/arti...

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3 days ago
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U.S. Billion-Dollar Weather and Climate Disasters in 2025 | Climate Central Research by Climate Central shows that during 2025, there were 23 individual weather and climate disasters with at least $1 billion in damages.

Billion $ Weather and climate disasters in 2025: "3rd-highest count of billion-$ disasters (inflation-adjusted to 2025 $) since 1980, trailing only 2023 & 2024, .... The total, direct cost of these 23 events in 2025 was approximately $115.0 billion"
www.climatecentral.org/report/us-bi...

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3 days ago
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Millions more people are in the path of rising seas than previously thought Oceans are rising as the climate changes, threatening coastal cities. A new study shows that much more of the world's population is vulnerable than earlier predictions had estimated.

"As many as 132 million more people than previously thought may be in the path of rising seas" if sea level rises by 3 feet/1 meter. This could happen by the end of THIS century unless we get more serious about halting global warming.
www.npr.org/2026/03/09/n...

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6 days ago
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Richard Somerville on the long history of climate change science “Everything depends on what people and their government do,” Somerville writes, not once, not twice, but (if I count correctly) seven times.

A new book worth checking out. “You might think that the science of climate change is young, and that scientists developed it only a few years ago,” Somerville writes. “That is not true.”
thebulletin.org/2026/03/rich...

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6 days ago
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Have Economists Underestimated the Cost of Climate Change? A new study suggests global warming could slash global GDP by up to 30% per degree of warming and reshape climate policy debates.

New research: "a permanent 1C increase in global temperature could reduce world GDP per capita by more than 20% in the long run, with some estimates approaching 30%." Even if it's half that bad, it's really bad...
earth.org/have-economi...

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6 days ago
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Climate change is speeding up — the pace nearly doubled in ten years Earth is now warming at a rate of around 0.35 ºC per decade, fresh analysis finds.

With an El Niño on the way, we're likely to see yet another jump in global temperatures in 2027 as the ocean gives up higher amounts of heat to the atmosphere. www.nature.com/articles/d41...

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6 days ago
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Scientists are trying to solve the mystery of whether global warming is speeding up. A new study says it has the answer | CNN Is the world getting hotter, faster? It’s a big question which has been puzzling and dividing scientists for years. A new paper says it has the answer, and it’s not good news.

He's talking about the U.S.: “I just could not have imagined that policymakers would get such clear evidence that we are heading into a very serious disaster for humanity and not act.”
www.cnn.com/2026/03/06/c...

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6 days ago
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Scientists are trying to solve the mystery of whether global warming is speeding up. A new study says it has the answer | CNN Is the world getting hotter, faster? It’s a big question which has been puzzling and dividing scientists for years. A new paper says it has the answer, and it’s not good news.

He's talking about the U.S.: “I just could not have imagined that policymakers would get such clear evidence that we are heading into a very serious disaster for humanity and not act.”
www.cnn.com/2026/03/06/c...

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1 week ago
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New analysis confirms global warming is accelerating. "all data sources agree: the warming rate has been far higher during the last decade than any previous." agupubs.onlinelibrary.wiley.com/doi/full/10....

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1 week ago
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Sea Levels Are Already Higher Than Many Scientists Think, New Study Shows

“from a global perspective, the findings indicate that hundreds of millions more people — particularly in… Southeast Asian & Pacific nations — are living closer to sea level than widely assumed by Western experts & policymakers”

www.nytimes.com/2026/03/04/c...

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1 week ago
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Western US snowpack is still looking BAD. Hope for snow, but plan for low river flows and severe wildfire risk.

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1 week ago
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This is why our electricity bills are so high right now — Ars Technica New data shows electricity rates rose 5 percent nationwide in 2025.

There are a growing number of reasons why electricity prices went up so much in 2025, and will go up more in the future. Bad energy policy is one reason, surging natural gas prices, infrastructure build out for increasing demand, and now another war.

apple.news/A-J8aQtEXQ0m...

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1 week ago
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Blood Moon setting over Lake Superior. Another Great Lake looking great!

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2 weeks ago
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The College Backlash Is a Mirage Americans are more pessimistic than ever about the value of a degree—but enrollment keeps going up.

College degrees are worth it more than ever, and people know a degree is going to help build many types of career: "Despite the reported skepticism of higher education, enrollment in four-year colleges and universities is growing."
www.theatlantic.com/ideas/2026/0...

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2 weeks ago
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Fossil fuel giant wins $370 million tax break for burning gas as an ‘alternative fuel’ The IRS allowed one of the world’s largest exporters of natural gas to claim its heavily polluting tankers are low-emissions “motorboats,” the company said.

No corruption here…
“The IRS ruling appears to allow one of the world’s largest exporters of natural gas to claim its heavily polluting tankers are low-emissions “motorboats.”

www.washingtonpost.com/business/202...

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2 weeks ago
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VOICES: Why solar still makes sense With 10-year payback and 30-year lifespan, solar panels protect Metro Detroit residents from rising utility costs and blackouts.

Can't stress this enough: "Here’s what fossil fuel corporations don’t want you to know: solar has officially become the cheapest form of energy in history"
planetdetroit.org/2026/02/sola...

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2 weeks ago
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Michigan going electric... Fun facts I just learned: EV & plug-in hybrid EV registrations in MI jumped 126% from 2023 to 2025, & the number of public DC fast chargers in the state jumped 84% from 2024 to 2025. Pretty easy (& more affordable) to ditch the old internal combustion vehicle in MI

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2 weeks ago
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Supreme Court’s Michigan pipeline case is about Native rights and fossil fuels, not just technical legal procedure The issue in front of the US Supreme Court is seemingly mundane, about federal or state jurisdiction. But it is actually much bigger, encompassing some key questions of the 21st century.

Excellent overview of the Line 5 SCOTUS case and the threats the pipeline poses to the Great Lakes, to Tribal rights, to state rights, and to climate change. It's infrastructure of a by-gone era that threatens too much.
theconversation.com/supreme-cour...

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2 weeks ago
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From Energy Use to Air Quality, the Many Ways Data Centers Affect US Communities Energy prices and water use aren't the only ways data centers affect U.S. communities. We break down the impacts — and how some states are dealing with them.

Excellent new data center overview doc. Note, however, that this is not a great idea: "Two-thirds of U.S. data centers built or in development since 2022 are in water-stressed areas."
www.wri.org/insights/us-...

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2 weeks ago
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Battery storage costs keep plummeting, as installations rocket up. One bright spot for the U.S. power grid.
www.canarymedia.com/articles/bat...

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2 weeks ago
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Climate change is already costing Colorado. A new report estimates how much costs will rise through 2050. Shorter ski seasons, hotter summers, longer wildfire seasons, increasingly burdened infrastructure and other climate-related impacts could cost Colorado up to $37 billion by 2050.  This is according t...

Colorado has an idea what climate change will be costing the state by mid-century: "Climate trends like deepening drought and extreme heat could wind up costing Colorado up to $37 billon"
www.skyhinews.com/news/climate...

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2 weeks ago
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Is Climate Change Making Inflation Worse?

Climate change also driving up inflation? “There’s mounting evidence that more frequent extreme weather events do make some things more expensive. But how that plays out depends on where you live”

www.nytimes.com/2026/02/23/c...

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2 weeks ago
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Economists Still Agree on Climate Change | The Regulatory Review Despite the retraction of a recent study, economists still agree that climate change is expensive and dangerous.

1 of 38 studies retracted, consensus remains strong: "An overwhelming majority of economists agree that the damages of climate change will be large, and the costs of climate inaction significantly exceed the costs of action."
www.theregreview.org/2026/02/23/h...

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2 weeks ago
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Snowball Earth might have had a dynamic climate and open seas Sediments from Scotland hint that ocean-atmosphere interactions continued more than 600 million years ago despite widespread ice.

As a fan of varves (annual lake sediment layers), this story is cool. We knew the ancient "snowball" Earth climate was really more of a slush ball, but quite interesting given that the distribution of continents 700 million yrs ago was way different.
www.sciencenews.org/article/snow...

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3 weeks ago
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Opinion | Can you spot these misconceptions around wind power? Take our quiz. The aesthetics of wind turbines are debatable. The fact of their increasing impact is not.

Take this quiz and learn about onshore wind electricity generation - the facts may surprise. www.washingtonpost.com/opinions/int...

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1 month ago
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What do people know about data centers? We explain in 5 charts. A new POLITICO poll shows that views about the artificial intelligence hubs swing if projects are associated with President Donald Trump.

Fascinating survey-based insight into how Americans think about data centers in their communities, as well as the politics of data centers. Most American's support data centers as long as...
www.eenews.net/articles/wha...

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1 month ago
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A big majority of Americans favor the regulation of CO2 (the most impactful greenhouse gas) as a pollutant. Strongly supported by science too!

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1 month ago
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As temperatures rise, US incomes fall Climate change is capable of affecting the entire economy

Costs of climate change continue to rise: "Global warming has cut incomes in the U.S. by 12% since 2000"
theweek.com/environment/...

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1 month ago
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The State of the Climate 2026 | Ep242: Zeke Hausfather How do we model the climate system? How warm will 2026 be? And can geoengineering be anything more than a bandaid? This week on Cleaning Up, Bryony Worthington sits…

Excellent pod on recent and future climate change, climate action, and geoenginneering pros/cons. www.cleaningup.live/the-state-of...

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1 month ago
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What the China-Canada EV Trade Deal Really Means Podcast Episode · Shift Key with Robinson Meyer and Jesse Jenkins · 01/28/2026 · 46m

Interesting pod: More Chinese EVs coming to N America, and “Fortress America” and continued anti-EV federal policy could mean American carmakers will “crumble.” podcasts.apple.com/us/podcast/s...

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