A magical record! Now 3,000,000 years long! Repost this quote and see if it increases by another order of magnitude.

Cc @sillin.bsky.social

As part of #PolarBearWeek (Nov. 2-8), a new AI-based system from @polarbearsinternational.org, tested in the Far North for several years, officially launched to alert locales of animals nearby to deter human-wildlife conflicts. @vfennalvarado.bsky.social www.theweathernetwork.com/en/news/natu...

Good morning from the tundra 💙

For our department Halloween party, I went as scary Stratospheric Aerosol Injection (SAI) - mostly to tease @danvisioni.bsky.social

Multi-panel view of the last few days of Hurricane Melissa: ↖️ GOES-19 infrared brightness temp ↗️ GOES-19 visible satellite ↙️ Hurricane hunter planes & flight paths ↘️ Recon-derived flight level wind swath ⬇️ Estimated minimum pressure from recon dropsondes

this is a very impressive analysis of some of the statistical "oddities" in Pielke Jr's analysis that normalized climate impacts are declining. Everyone should read this. economicsfromthetopdown.com/2025/10/26/r...

For understanding climate change impacts to tropical cyclones in near-real time, explore our new attribution pages unique to each storm from @climatecentral.org: www.climatecentral.org/tropical-cyc... "Climate change made the ocean temperatures along Melissa's path 500 to 700 times more likely."

With the Arctic sea ice maintaining its trend of declining, average extent since the 1980s, there is another side to the story with a unique, slightly more positive statistic. @polarbearsinternational.org @climateflavors.bsky.social www.theweathernetwork.com/en/news/clim...

Really important paper led by my @iiasa.ac.at colleague Alex Nauels www.nature.com/articles/s41... “The difference between decisive climate action today and continued high emissions is not just measured in degrees of warming but also in meters of sea-level rise” 👏👏👏

The Billion Dollar Weather and Climate Disaster dataset is back and now at @climatecentral.org! Through the first half of 2025, there were 14 separate billion-dollar weather and climate disasters across the United States, costing $101.4 billion. 1/2 www.climatecentral.org/climate-serv...

A request for weather interested volunteers! Met Eireann would like to rescue millions of weather observations taken in Ireland over many decades that are still stuck on paper. #WeatherRescue Anyone can help: www.zooniverse.org/projects/met...

Thanks to @climateflavors.bsky.social of @polarbearsinternational.org for the assist. Study says billions of tonnes of defrosted carbon could get released into the atmosphere by 2100 due to melting permafrost, further adding to Earth's warming from more GHG. www.theweathernetwork.com/en/news/clim...

The attack on @frediotto.bsky.social was seeded years ago by Roger Pielke Jr, who started arguing that this table from a recent @ipcc.bsky.social report proved that climate science cannot attribute extreme weather to climate change. But Roger is of course lying. And we know this for 2 reasons. 🧵

It seems there are two main reasons things haven’t gone completely to shit in the US: 1. Lawyers and the courts; 2. Journalists and the media. Most of us can’t do anything about the first, but we can support journalism. Stop complaining about paywalls and subscribe to news & donate to public media.

Sometimes I think about how from 1935-1975ish, Bell Labs produced an insane amount of revolutionary science and technology, including 11 Nobel Prizes, the transistor, UNIX, C, the laser, the solar cell, information theory, etc. The secret? Provide scientists with ample, steady, no-strings funding.

This is why two hurricanes can not merge into a monster. Watch as #Imelda’s growing outflow and sinking air impinges on #Humberto’s core, likely soon leading to weakening. Systems are now under 600 miles apart.

If there is one piece of good news regarding our planet's future, it's our ozone layer and ongoing shrinking of its hole. New @wmo-global.bsky.social report said Earth's protective ozone layer is healing and the hole in 2024 was smaller than in recent years. www.theweathernetwork.com/en/news/clim...

🧪 Were you one of the many thousands of STEM students (and mentors) impacted by the sudden change in #NSF #GRFP eligibility last week? We created a petition to NSF leadership and Congress to reverse the changes - please sign and share your stories here!! laurenkuehne.github.io/grfpChanges/

A lot of people think that every international student admitted means one fewer spot for domestic students, when the opposite is more likely true - the tuition revenue international students bring allows public universities to provide substantial discounts to domestic students, improving access.

Paris-Berlin sleeper: low carbon, 2 years old, constantly full, but currently losing SNCF a few million EUR/yr Intl Jet fuel tax exemptions are 80 years old and cost the EU 22 million EUR/yr for the Paris-Berlin route alone. And you're cutting... the sleeper? www.theguardian.com/travel/2025/...

📢 Submissions are now open for the U.S. Climate Collection, a joint @theAGU + @ametsoc initiative. This special collection will publish U.S.-focused climate assessment science that’s free to read, ensuring rigorous, accessible science informs decisions for years to come. 🔗 buff.ly/1tHUSLC

New paper out. In which we helped the folks at the Allen Institute for AI (AI2) show that their climate emulator does a good (though not perfect) job at reproducing E3SMs' response to different SST boundary conditions. 1/ agupubs.onlinelibrary.wiley.com/doi/full/10....

Our working hypothesis was they were going to have AI summarize all 350,000 comments but it turns they’re just going to <checks notes> ignore them entirely

🚨 NCA5 is now LIVE! 🚨 They took it down, but we've brought it back at: nca5.climate.us Bookmark. 👏 this. 👏 page. 👏 This is just our first step in restoring trusted science information that Americans need to understand what's happening with the climate.

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!

After a brief (ahem) hiatus, the HadCRUT5 global temperature dataset has now been updated to June 2025 by @metoffice.gov.uk @climateuea.bsky.social and @ncas-uk.bsky.social

The last few years definitely raise some questions about the lower bounds of ECS BUT.. people, AR7 can't cite bluesky. We need strong updated literature, which fully takes into account the last few years of data - ideally from a few independent groups. Tick tock

#realktalk though, when is the deadline for papres to be accepted to be considered for AR7?

Yet another Nat Cat job? Actually, we're searching for TWO experts, specialized in tropical cyclones or earthquakes. US or UK, remote work definitely an option. Great job for an ECR physical scientist looking to join the insurance/reinsurance industry! eedu.fa.em3.oraclecloud.com/hcmUI/Candid...

Es ist eine grosse Ehre, den 2025 Deutschen Umweltpreis zu erhalten! Danke an alle meine jetzigen und ehemaligen Gruppenmitglieder und viele Kolleg:innen! @lukasgudmundsson.bsky.social @yasserhaddad.bsky.social @yannquilcaille.bsky.social @michaelgwindisch.bsky.social @usyseth.bsky.social

“particles spewed by Canadian wildfires killed 82,000 people in 2023, according to a study published in Nature on Wednesday. The long tendrils of smoke choked towns not just in Canada and the US, but also across the Atlantic. The pollution was responsible for 22,000 early deaths in Europe alone.”

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!

It's Reviewer classics week: - This work is not novel but I can't provide literature to back up my verdict. - While you have now included all the datasets that I asked you to, you are still not considering enough datasets. - Do this analysis that you already did (in the supplement).

Our new study on how large floods will change in Europe under climate change, led by @bfang.bsky.social, with @bevacquae.bsky.social

Thanks to @climateflavors.bsky.social of @polarbearsinternational.org for the chat, help with this. With the Arctic's sea ice loss a worrisome trend, projections continue to indicate when the region could see its first instance of individual, ice-free day. www.theweathernetwork.com/en/news/clim...

Our 400+ page comment on the DOE climate working group report is now out. Our conclusion: The merchants of doubt are back, and they're coming for climate science.

Wikipedia editors trying to fend off the onslaught of AI crap have crowdsourced some telltale signs of LLM-generated writing; it might be handy for editors and proofreaders generally. Thanks to @ellenrykers.com for pointing me to it. en.wikipedia.org/wiki/Wikiped...

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.

I raise this point frequently - we're not even well-adapted to the weather and climate extremes we already experience ('adaptation deficit', a la Burton 2009). Addressing that would go a meaningful way toward reducing total vulnerability to future climate changes www.pnas.org/doi/10.1073/...

My lab's been attacked by an anti-wind group and their lawyers. They threatened the science funding of my whole university, to shut me and my undergraduate research assistants up. NYT just covered it. 1/n www.nytimes.com/2025/08/25/c...

My latest: The Trump administration is not waiting for the next fiscal year -- or Congress -- to cut climate science at NOAA. A new document details the money it won't spend *this* year on climate research.

Worthwhile (and moving) read on strategies for continuing to do important research under threat. hrdag.substack.com/p/scatter-an...

🚨 REPORTERS: Join Our DOE Climate Report Media List 🚨 If you're a reporter or communicator, sign up for updates on comments regarding the DOE climate report. We will share embargoed releases, background materials, and follow-up opportunities with you.

Excellent write-up by Bob Henson on a series of new papers, including ours, pointing to a larger role for external forcing in the Southwest's recent drying, not only through the well-studied warming but also through declines in precipitation.

This is an important article about the recently released DOE climate report which is immediately being used to remove important federal action on climate change. This quote summarizes the situation quite well. A “tell me how you really feel” moment. www.cnn.com/2025/08/08/c...

Right then... A quick review of the DOE's new 'critical review' of climate science. Whether it's worth a formal community response - I'm still not sure, but here's my first thoughts /thread/

Please consider joining our #AGU session on compound climate events, led by @rahimileila.bsky.social. Invited speaker: Markus Reichstein. agu.confex.com/agu/agu25/pr...

Please consider joining our #AGU session on beautifully complex Water-Energy-Carbon interactions with a broad scope from theory to applied science. Invited talks by Julia Green @juliakgreen.bsky.social and Gabe Kooperman.