I think I have the same reaction to @hausfath.bsky.social and Keith’s op/ed as I do with the idea that global climate “tipping points” and “planetary boundaries” should be the basis of global climate governance —

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

I have a new @nytimes.com guest essay w/ @davidkeith.bsky.social about sunlight reflection. We note its not a solution for climate change and at best a band aid to treat systems, and suggest if its ever done it should only be to replace the cooling from air pollution today:

As a reminder, land areas (where we live) are warming around twice as fast as over the oceans. Subsequently, most of us are 'feeling' temperatures rising faster than the global mean record. Graphic from zacklabe.com/climate-chan...

The Northern Pacific Ocean is currently smashing temperature records. And it is reaching these levels far earlier than the current generation of climate models had expected. A short thread 🧵

India has broken my graph. 30 GW of renewables added so far this year, ahead of 28.6 GW for all of 2024. robbieandrew.github.io/india

This week, @MLiebreich talks to @hannahritchie.bsky.social about her new book 'Clearing the Air', busting 50 climate myths and digging into what really works (and what doesn’t). Out now 🔗 www.youtube.com/watch?v=voLb...

A new report by the prestigious US National Academy of Sciences concludes that the EPA’s 2009 endangerment finding was accurate, has stood the test of time, and is now reinforced by even stronger evidence:

⏰ Reminder: Tomorrow! 🌍 Berkeley Earth Monthly Press Briefing 📅 Wed 9/17 | 8am PDT / 5pm CET Join @rarohde.bsky.social , @hausfath.bsky.social, and our team for insights from the August 2025 Temperature Report + a live Q&A. 🔗 Register: us02web.zoom.us/webinar/regi...

After falling for much of the year (following the record warmth of 2023 and 2024), global temperatures have started to tick back up over the past 6 weeks. We are currently on track for the third warmest September on record.

We're halfway between the IPCC 6th and 7th Assessment Reports, and an international team of 61 scientists updated some of the key metrics used in the reports. As I wrote for @climateconnections.bsky.social, the findings were pretty bleak, but there are some glimmers of hope 🧵 (1/6)

Apropos of nothing… youtu.be/FtxqohNtLIg?...

Whoa! Elsevier fired @richardtol.bsky.social, longstanding Editor-in-Chief of the journal Energy Economics. Richard's side of the story should be ringing alarm bells. #EconSky Fraud and cover-up richardtol.substack.com/p/fraud-and-...

"When political violence becomes imaginable, either as a tool of politics or a ladder for fame, it begins to infect hosts heedlessly."

Best thing California could do to fight fascism is build more housing.

The current administration has claimed renewables are making the grid less reliable. If that were the case, I'd expect states adding the most renewables over the past decade to have the largest increase in outages. However, the opposite seems to be true!

Climate skeptics have long been obsessed with corrections to temperature records for changes in measurement techniques and instruments over time. But it turns out that if we just used the raw data we'd see more warming. My latest at The Climate Brink: www.theclimatebrink....

New starter pack with @ipcc.bsky.social #AR7 scientists (bureau, authors, REs)! Full list: apps.ipcc.ch/report/autho... For SR cities scientists see separate starter pack! @dianaurge.bsky.social @sherilee.bsky.social @siir-kilkis.bsky.social @janfuglestvedt.bsky.social go.bsky.app/2FuXb3Y

August 2025 was the third warmest August on record after 2023 and 2024 at approximately 1.3C above preindustrial levels. This continues a string of recent months a bit cooler than the exceptional 2023/2024 temperatures but warmer than any prior years.

I'm not sure many folks realize just how persistent the warming from CO2 is. Here is a set of 1000-year climate model runs (using FaIR) simulating one year of CO2 emissions (40 gigatons in 2020); a millennia later the world has not cooled back down!

Proud to be part of an effort by 85 scientists from around the world to respond to a misleading DOE climate science report last month. The fact that our rebuttal is more than 3x the length of the DOE report is a good example of Brandolini's Law in action...

Welcome progress in making climate science a little more operational (and responsive). (This is what we were talking about in our opinion piece last year: www.nytimes.com/2024/11/13/o... @hausfath.bsky.social )

Grok showed up in my Tesla this morning, and started speaking to me without me trying to trigger it. I saw a tab called "conspiracy theories", clicked it and asked Grok about climate change. This is what Elon Musk is telling Tesla drivers about climate change.

The US is building a record amount of electricity generation capacity in 2025 to meet rapidly growing demand. And its overwhelmingly clean energy, with a bit of gas. Meanwhile the Trump administration wants to stop permitting of new solar and wind projects.

Happy to announce that I'll be serving as a lead author for Chapter 2 (titled "Large-scale changes in the climate system and their causes") of the upcoming IPCC 7th Assessment Report, alongside 21 other scientists from around the world: apps.ipcc.ch/report/...

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...

July 2025 was the third warmest July on record in the ERA5 dataset at 1.25C above preindustrial levels, though it was notably down from the prior records set in 2023 and 2024.

Is sea level around the US accelerating? If you actually do the analysis, instead of just repeating talking points from decades ago, the answer is yes. tamino.wordpress.com/2025/08/03/s...

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....

Nothing ever changes but the climate Thorts on a repought. diagrammonkey.wordpress.com/2025/08/01/n...

NEW: i spoke to nine (!) scientists across several disciplines whose work was cited in the new Department of Energy report that downplays the severity of climate change. all of them say their work was misrepresented, cherry picked, and/or lacked context —

2025 has seen the second warmest first half of the year on record after 2024 – and is on track to be the second or third warmest year since records began in 1850. My latest State of the Climate report over at Carbon Brief: www.carbonbrief.org/...

The EPA cited my paper in their argument against the endangerment finding today. However, their point is completely backwards: my paper actually supports the EPA's 2009 range of 1.8C to 4C warming by 2100. www.nature.com/artic...

I got to be a guest host on the Open Curcuit podcast with @stephenlacey.bsky.social & @cleangridview.bsky.social this week, & here’s how we talked about the One Big Beautiful Bill & what it does to raise costs, raise emissions, & reduce reliability. 🔌💡 Listen: www.latitudemedia.com/news/open-ci...

Global emissions from heating are about 4x those from cooling. Air conditioning is an important and lifesaving adaptation to climate change. Decarbonize the grid.

Great Ezra Klein interview with Jane Flegal and Jesse Jenkins this week on the emissions impacts of the partial repeal of the Biden administration's signature climate law and the path forward for decarbonization: www.nytimes.com/2025...

People disagree about nearly everything in the climate space. EXCEPT BIOFUELS. Absolutely everybody thinks using corn & soy for fuel is a terrible idea - except the people who stand to gain from it, and the people who want those folks' votes. www.reuters.com/sustainabili...

Has renewable energy reduced electricity prices? As I discuss over at The Climate Brink, empirical evidence over the past 24 years in the US points to yes: www.theclimatebrink.... Here is the change in non-hydro utility scale renewables and electricity prices for each state.

🌳 🔥 🌎 Our new paper: The extreme fire-prone #weather underpinning some of the worst #wildfire episodes this century has become more than twice as likely due to #climate change—a trend now evident across much of the world's tropical and mid-latitude #forests. www.nature.com/articles/s41...

And now: A thread regarding my thoughts on "1.5°C"--not only as a Paris Agreement target, but also re: relevance to recent #climate events & overlaps (or not) w/geophysical realities. (This was originally written as a response to a journalist, who used excerpts in their article.)

"The power of human beings to control and change the environment is growing as our technology grows. At present, we clearly have reached the stage where we are capable to make significant changes in the global climate." -Carl Sagan, 1985

Join @rarohde.bsky.social, @hausfath.bsky.social and the Berkeley Earth team this Thurs 7/10 at 8am PDT/5pm CET for our next monthly press briefing featuring updates and insights from our June 2025 Temperature Update. 🔗 To register: us02web.zoom.us/webinar/regi...

The flooding of the Guadalupe River in Texas was undoubtedly made worse because of climate change. I would estimate that there was 7-20% more rainfall than w/o the human interference in the climate. But w/o detailed attribution studies on the storm and associated runoff, we can't know for certain.

Today, *every* living prior leader of NASA's science directorate have released a joint letter condemning the proposed cuts to NASA science. These individuals every administration from Reagan to Biden, and all believe these cuts are insanely destructive: www.planetary.org/press-releas...

On The Climate Brink: What to know about the flooding in Texas? What's the connection to climate change? www.theclimatebrink.com/p/update-on-...

Good piece by @andrewdessler.com over at The Climate Brink on the role of climate change in increasing the severity of extreme precipitation events: www.theclimatebrink....

June 2025 was the third warmest June on record after 2024 and 2023 in the ERA5 dataset. It was approximately 1.3C above preindustrial (1850-1900) levels.

I often hear claims that variable renewables (wind and solar) increase electricity prices, but this does not seem to empirically be true. If anything states, with higher renewables have slightly cheaper electricity, though the relationship isn't significant:

I'm furious that the world no longer has access to the U.S. National Climate Assessment. I was a contributor to the 4th Assessment, watched the hard work of my White House colleague roll out the 5th, and I was the lead author of the Mitigation Chapter for the 6th Assessment before they dismissed us.

This comparsion in the NYTimes today is pretty stark. China is racing ahead to be a high-tech exporter of 21st century technologies, while the US is doubling down on being a petro-state exporting the technologies of the 19th century: www.nytimes.com/inte...