In 2009, the EPA found that greenhouse gasses endanger public health, and put in place measures to protect the environment. Now, Trump’s rolling back these protections, making us less safe, and devastating the environment. @houseseec.bsky.social and I are demanding he restore these protections.

Trump was 24 years old in 1970. Maybe he just hasn't stayed up to date with climate science in the 55 years since...

In a UN speech today, President Trump said that "all of these [climate] predictions were wrong". Back in 2019 I led a research effort to digitize old climate model projections and assess how well they did. Turns out they got future warming pretty spot on!

Sorry, but disagree with @hausfath.bsky.social here. You open Pandora's box, you ain't closing it again. We've already seen with Paris that well intentioned international agreements do not translate into physical reality and SRM governance is a much harder problem. Zero is the only safe level. /1

Would be nice to see the enthusiasm for SRM redirected toward methane abatement and urban heat island mitigation, neither of which are “magic bullets” like SRM, but both of which meaningfully complement the temporal and/or spatial scales of decarbonization benefits

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How does one of the most insightful climate scientists, Ray Pierrehumbert, who literally wrote the textbook on the topic, not have more followers?

Top Scientists Find Growing Evidence That Greenhouse Gases Are, in Fact, a Danger www.nytimes.com/2025/09/17/c...

I like Adam's work, and wish the department the best, but if I were an early career person thinking of this position, I'd have to ask myself whether given how Columbia disgraced itself by caving in to Trump, there could be any reassurance Columbia would have my back if my climate work irritated him.

Tonight I’m going to tell you about a California bill called SB326, authored by Senator Josh Becker and cosponsored by Senators Laird and Stern. This bill is perhaps the most significant wildfire legislation to land on Governor Newsom’s desk this year. I hope he signs it.

Maybe the land carbon sink is weaker than we thought. Big implications: "A lower-than-expected land carbon sink would also imply that the land biosphere may be closer to transitioning from a net carbon sink to a net source than current models predict" Randerson et al. www.science.org/doi/10.1126/...

I'm hiring a postdoc to join the Climate, Pollution, and Solutions group at UC Irvine's Earth System Science Department! Flexible start date + research on one of three tracks in climate, pollution, and solutions. More info on the position and how to apply in the ad here: recruit.ap.uci.edu/JPF09874

The Department of Energy hired five academics to raise doubts about climate change. 85+ climate experts (organized by @andrewdessler.com) reviewed their report. Our conclusion, detailed in 450 pages of analysis: it is biased, full of errors, and not fit to inform policy making.

Look at this graph. The share of national income going to the richest 10 percent was lowest (and share to lower 90 percent highest) when union membership was at its highest. As unions have weakened, inequality has widened. This is why we must build back union power.

🌊With the Fall semester upon us, it's time to start thinking about recruiting/applying to grad school for 2026. If you are a marine scientist looking for a graduate student, I've created a form where you can add your name and other info: docs.google.com/forms/d/e/1F... Please share widely! (1/2)

No More Unions Allowed At NASA. Happy Labor Day. nasawatch.com/personnel-ne... #NASA @NASA

New AMS statement outlines five foundational flaws that make the Department of Energy's Climate Synthesis Report "inconsistent with scientific principles and practices." Read the full statement: https://bit.ly/3UQRC82

Our comment on the DOE CWG report is done. It tips the scales at 439 pages, approx. 3x longer than the DOE report. This is related to Brandolini's law: The amount of energy needed to refute bullshit is an order of magnitude bigger than that needed to produce it. Example: refuting one sentence.

🌊 Together with @krhendry.bsky.social, Tiago Dotto, Madeleine Youngs and Andrea Piñones, we are organizing a workshop on "Ocean Connectivity and Exchange Across the Antarctic Peninsula: Processes and Impacts". It will be held via zoom on October 14-16. Pre-registration form below. Please join us!

Advertising this PhD student position once more (deadline 30 August) workingat.nioz.nl/o/phd-positi... We are looking for someone with a MSc in physical oceanography, fluid dynamics or physics to study how ocean eddies contribute to the Atlantic Meridional Overturning Circulation

"American science has no need to be "Restored" to a "Gold Standard:" American science has already set the "Gold Standard" for scientific research and publishing for over 80 years." Read the full Editorial by the #AGUPubs Editors-in-Chief: doi.org/10.1029/2025... #GoldStandardScience

Today marks day 1 of public hearings on the EPA’s reconsideration of the endangerment finding, a 2009 declaration that greenhouse gases threaten public health. Follow along with us👇🧵

Excellent article explaining the situation relating to the only US Antarctic research icebreaker. Stopping research on why flow of some marine-based glaciers in Antarctica has accelerated, discharging increasing amounts of ice into the ocean, won't stop it happening. We'll just know less about it.

The National Science Foundation will stop operating the Nathaniel B. Palmer icebreaker and slash polar science funding by 70 percent, devastating Antarctic research

Sign AGU’s letter to defend climate science. 
The Trump administration has proposed overturning the EPA’s endangerment finding — the science-based determination that greenhouse gases threaten public health.

The recent DOE climate science report misrepresents the work of many researchers. Carbon Brief asked those cited to review the parts of the report where their work was used, and we collectively found 100+ misleading or false statements: interactive.carbonbr...

Very cool paper

Research advocates are expressing alarm over a White House directive on federal grantmaking released yesterday that they say threatens to enhance President Donald Trump’s control over science agency decisions on what to fund. scim.ag/45q6P4J

Portal to help support the NASEM fast-track effort to assess the EPA endangerment finding (deadline for submissions, Aug 27) www.nationalacademies.org/our-work/ant...

I have a new post over at The Climate Brink on how the recent DOE report on climate science and the EPA's proposed overturning of the endangerment finding used and misused my research: www.theclimatebrink....

“Humans are highly adaptable and Americans are particularly so, but the data and evidence indicate that climate change will cause many Americans to die earlier than they otherwise would,” write Solomon Hsiang and Marshall Burke, two climate scientists and Stanford professors.

I've been getting a lot of requests for comments on the DOE report "A critical review of the impact of U.S. greenhouse gas emissions on the U.S. climate". Here are some initial thoughts. More will come later.

Since 1968, the United States has always had at least one research vessel operating in Antarctica. Until last year, we had two. If the Palmer is decommissioned, the U.S. would no longer have a dedicated research ship in Antarctica. For the first time in almost six decades. (2/n)

🌊❄️🧪 🇦🇶 Please share: We have learned that the National Science Foundation is moving ahead with plans to decommission the U.S. Research Vessel/Ice Breaker Nathaniel B. Palmer this October. If you care about Antarctic research, please read on (1/n)

Exciting paper answering a question we have been asking for years: Why is the ocean-sea ice model ACCESS-OM2-01 simulating the formation of Dense Shelf Water around Antarctica so well? More in this paper by colleagues from ANU and @antarcticsciaus.bsky.social 🌊🇦🇶

Today, President Trump signed a bill into law that will eliminate $1.1B of federal funding for public media. This devastating act tipped the threat against journalism in America into a crisis. Millions depend on the NPR Network. Now, we’re counting on you. Donate here: n.pr/458sOhq

Tomorrow the International Court of Justice (ICJ) will issue an advisory opinion (AO) on nations’ responsibilities to address climate change & uphold human rights. I'm grateful to have been a climate science advisor on it, supporting the testimonies of Sierra Leone, Namibia, & others #ClimateICJAO

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Discontinuing the Mauna Loa observing program would be a tragedy. The epitome of sticking your head in the sand. www.nytimes.com/2025/07/17/c... See the compelling case for maintaining the Keeling Curve from Keeling himself: www.youtube.com/live/CcWR6Cd...

Today is a day of action to protect science and American innovation. Email Congress, call your representative. www.protectscienceandinnovation.org

We are six months into the second Trump administration and the scale and severity of its assault on our nation's science and democracy has been unrelenting. Today, @ucs.org releases a detailed assessment of the damage so far and where we go from here: www.ucs.org/resources/sc... #ProtectScience

a key result is that using state-of-the-art mixing maps NEMO simulates ventilation ages in the mid-depth Pacific which are *way too old*

Deep Ocean Ventilation: A Comparison Between a General Circulation Model and Data-Constrained Inverse Models - new paper led by former PhD student Bruno Millet comparing ventilation timescales and pathways between OCIM, TMI, and NEMO agupubs.onlinelibrary.wiley.com/doi/full/10....

IBES affiliate @maratimes.bsky.social, an assistant professor of Earth, Environmental, and Planetary Sciences, lost her first federally funded grant from NASA earlier this year. “One of my big concerns is that the trust in science and in scientists is broken,” she told @virginiagewin.bsky.social.

"The private sector cannot fill this void. The National Weather Service processes over 6 billion observations daily and issues approximately 1.5 million forecasts and 50,000 warnings annually. No private entity possesses infrastructure that can match this scale and reliability."

This is horrible news for anyone who breathes air or drinks water. EPA's research arm works to identify emerging pollution hazards. Ask yourself, who would be against that...🤔🤔🤔

NASA ROSES is out (delayed from Valentine's Day) and there is *nothing* in it for cryosphere research. While the ice sheets are melting, sea ice cover is shrinking, permafrost is slumping, sea level is rising...NASA cannot fund you to work on any of it.

In these times of imposed austerity, in which higher education faces existential threats from the government, I feel blessed to have three brilliant new faculty members joining us at UCI ESS! Welcome Mark (@markengland.bsky.social‬), Lyssa (@lfreese.bsky.social‬), and Leonard! ps.uci.edu/news/3336

Big up to @rdzombak.bsky.social for bringing eyes to this story. 🧪 So many people beyond my little cohort of fellows are impacted by slowdowns at NOAA. America is rapidly losing footing as a leader in climate science and we all are paying the cost.