This past month showed us once again how extraordinary our weather and climate community is (scroll for 🧵). Whether you’re joining us as student, scientist, hobbyist, or concerned citizen, let’s #SaveNCAR and put an end to the war on science together 💯

Looking for: postdoc on quantitative history of China; postdoc on measuring wildfire fuels with LiDAR; PhDs on modeling fire in the boreal forest and the Pacific Northwest; MSc’s on earth system science; interns in many topics. Check it out!

Our guide to approaching (and starting!) conversations about NCAR and the importance of weather and climate science. #SaveNCAR

There aren't a lot of resources for what people can do to prevent the destruction of NCAR, so I made this: #NCAR #climate #climatescience #weather #meteorology #activism #myresources

From wildfire warnings to flood forecasts, NCAR's research impacts everyone in America. President Trump's attempt to dismantle it for political vengeance is beyond reckless. We will fight against this dangerous scheme every step of the way.

From @AGU.org: Senators are working on legislation to save NCAR, but we need extra support for these 8 states. Your Senators in Alabama, Alaska, Florida, Louisiana, Mississippi, North Carolina, Texas, and Wyoming need to hear from you.

On #AGVTV at #AGU25, Dr. Melissa Kenney and I talked about the opportunity for the entire scientific community to contribute towards climate assessment research. Submit your papers at USclimatecollection.org. youtu.be/7Kb-hfwIUxQ?...

I came to the US over 10 years ago for a postdoc at NCAR. It changed my life and supercharged my ability to do science. NCAR's unique community nature makes it a global node in atmospheric and climate research. It's really not possible to overstate its value for science and society.

It’s simply not possible to overstate how important NCAR is to US and world science. We need to fight this with everything we’ve got.

For 40+ years, the U.S. gov has conducted highly respected & productive polar bear research. At a time when many in power question the value of gov-supported scientific research, some involved express concern about what is at stake. Learn why gov-led polar bear research is vital. pbears.org/4a1eRVE

Join us! In a few days, @climatecentral.org will be launching a new webinar series on the state of our climate! I’ll provide monthly overviews of current global and U.S. conditions, along with special guests, featured topics, and written reports. ➡️ Sign up at www.climatecentral.org/climate-brie...

I was the 92nd viewer. This should have 92M views.

In a new article over at Carbon Brief, I explore why the past three years – 2023, 2024, and 2025 – have been exceptionally warm. The main culprits turn out to be a combination of El Nino and internal variability, declining aerosols, and a strong solar cycle: www.carbonbrief.org/...

📢Submit to our EGU session!📢 We are organizing a session at EGU 2026 in Vienna, with a focus on climate sensitivity, radiative feedbacks and the pattern effect! If you work on anything related to climate sensitivity, we'd love to have you! 🥳🥳🥳 Submit soon! :)

This is absolutely awful. This was one of the best resources for climate indicators data, and my go-to share for help answering public questions. Luckily I captured some of them on my new U.S. climate page a few months ago: zacklabe.com/united-state...

Fall (Sep-Nov) 2025 was the warmest on record for the combined U.S and Canada region.

New on SHIFT KEY: 2025 has been a wild and wacky year for climate policy. What did @robinsonmeyer.bsky.social and @jessedjenkins.com get right about what to expect — and what did they get wrong? Listen to the full episode here or wherever you get your podcasts: podcasts.apple.com/us/podcast/s...

Hudson Bay is finally starting to freeze over in earnest. 2025 will likely go down as the 2nd-longest ice-free period for the Western Hudson Bay polar bear population, continuing the long-term trend (now >1 month longer than in the 1980s).

Kelly's point is why I think the merits of Zillow removing climate risk scores (www.nytimes.com/2025/11/30/c...) is fairly nuanced. To make it clear: Zillow clearly did not do this for the right reasons, and the realty and developer lobbies have long been opponents of better climate information.

October 2025 was the warmest October on record for the #Arctic. Arctic sea-ice extent is currently the lowest on record for late November. My newest 'climate viz of the month' summarizes some of this latest data: zacklabe.com/climate-viz-... #ClimateChange #SciComm #OpenScience #OpenData #DataViz

Tehran is having an historic drought due to a combination of factors, including climate change. The ocean is not helping. 1/3

My latest for @science.org: A remarkable set of high-resolution climate model runs, computed over 900 (!) days of supercomputing time, are revealing how warming-induced changes to Earth's wind patterns due can prime huge spikes in extreme rainfall. But the MESACLIP runs also do much more than that.

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