Lightnews — Scholar-powered news

Reposted by Flavio Lehner

Kevin J. CREATURE @kevinjkircher.com · 4d

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.

sites.stat.columbia.edu

51 490 1.7K

Reposted by Flavio Lehner

Jeff Berardelli @weatherprof.bsky.social · 9d

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.

13 43 210

Reposted by Flavio Lehner

Nate Howes TWN @natetwnclimate.bsky.social · 9d

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...

Smaller ozone hole in 2024 pushes Earth closer to seeing it vanish - The Weather Network

A new World Meteorological Organization (WMO) report offers good news about Earth's ozone layer, which is on the road to a recovery to 1980 values in the coming decades--a positive sign for the health...

www.theweathernetwork.com

1 2 3

Flavio Lehner @climateflavors.bsky.social · 9d

Fyi, you can have global entry with only a greencard.

Fingers crossed you don’t have to have any such discussion.

1 2

Reposted by Flavio Lehner

Lauren Kuehne @omfishient.bsky.social · 9d

🧪 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/

Petition to NSF to Restore Eligibility for the 2026 Graduate Research Fellowship Program Competition

laurenkuehne.github.io

12 16

Reposted by Flavio Lehner

Dave Vanness @djvanness.bsky.social · 9d

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.

Nick Fleisher @nickfleisher.bsky.social · 9d

30% drop year over year!

Amid visa restrictions, international freshmen enrollment plummets at UW-Madison

This year’s number of international freshmen is the lowest recorded since at least 2015.

www.jsonline.com

82 1.7K 5.9K

Reposted by Flavio Lehner

Ben Sanderson @benmsanderson.bsky.social · 9d

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/...

It’s goodnight Vienna as Paris sleeper train to Austria and Berlin hit by cuts

Some Nightjet services suspended from mid-December after French withdrawal amid public budget crisis

www.theguardian.com

12 270 490

Reposted by Flavio Lehner

AGU (American Geophysical Union) @agu.org · 13d

📢 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

2 22 32

Reposted by Flavio Lehner

Cristi Proistosescu @cristiproist.bsky.social · 13d

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....

Applying the ACE2 Emulator to SST Green's Functions for the E3SMv3 Global Atmosphere Model

The Ai2 Climate Emulator broadly captures the top-of-atmosphere (TOA) radiative response to local sea surface temperature (SST) anomalies ACE and EAMv3's global TOA radiation sensitivity to all S...

agupubs.onlinelibrary.wiley.com

2 10 25

Reposted by Flavio Lehner

Christopher Callahan @ccallahan45.bsky.social · 14d

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

James Goodwin @jamesgoodwin.bsky.social · 14d

"... Zeldin intends to sign off next week on the final policy and legal justifications for repealing the so-called endangerment finding and Biden-era climate rules for cars and trucks... before agency staff have time to sift through all public comments...." subscriber.politicopro.com/article/eene...

E&E News: Internal docs: Zeldin races ahead without analysis in endangerment rollback

The EPA administrator plans to sign off on the repeal's policy and legal justifications before his staff finishes the regulatory impact analysis.

subscriber.politicopro.com

7 14

Reposted by Flavio Lehner

Climate.us @climate.us · 15d

🚨 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.

5 100 220

Reposted by Flavio Lehner

Zeke Hausfather @hausfath.bsky.social · 15d

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!

17 370 770

Flavio Lehner @climateflavors.bsky.social · 16d

Sorry, I meant 5.0.2...

1

Flavio Lehner @climateflavors.bsky.social · 16d

Thanks and nice to see this, Tim! What's happening over North America in CRUTEM 5.1 minus 5.2? Just random variations in stations reporting or something more systematic?

1

Reposted by Flavio Lehner

Tim Osborn @timosbornclim.bsky.social · 16d

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

1850-2025 time series of global mean temperature anomaly from the HadCRUT5 dataset.

6 44 120

Reposted by Flavio Lehner

Ben Sanderson @benmsanderson.bsky.social · 18d

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

Cristi Proistosescu @cristiproist.bsky.social · 18d

ECS <2 is absurd in the year of our lord 2025.

The data used in Sherwood et al is now almost a decade old (not to mention Lewis and Curry 2014).

Even ignoring pattern effects, we’re now already at ~1.5C with less than 2xCO2 and an even larger energy imbalance.

No way Effective ECS is <2.

Ken Rice @kenrice.bsky.social · 18d

But it's not just uniform vs Jeffreys. There are other priors and there are other ways to estimate ECS. As Andrew points out, if your method suggest a good chance of the ECS being < 2K, then there's probably an issue with the method, or it's at least worth considering this.

1 2 11

Reposted by Flavio Lehner

Cristi Proistosescu @cristiproist.bsky.social · 18d

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

1 1 2

Reposted by Flavio Lehner

Scott St. George @scottstgeorge.paleohydrology.com · 23d

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...

Natural Catastrophe Analyst - Earthquake/Hurricane Specialist

An exciting opportunity to join an established research network team at Willis (a WTW business), helping clients understand and manage risk while shaping the Willis “view of risk.” Using your scientif...

eedu.fa.em3.oraclecloud.com

9 6

Reposted by Flavio Lehner

Prof. Sonia I Seneviratne @soniaseneviratne.bsky.social · 27d

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

DBU Deutsche Bundesstiftung Umwelt @umweltstiftung.bsky.social · 27d

Ausgezeichnet!🏆Mit dem Deutschen Umweltpreis 2025 von der DBU #uwp25 werden die Klimaforscherin @soniaseneviratne.bsky.social @ethz.ch & das Geschäftsführungsduo Lars Baumgürtel und Dr. Ing. Birgitt Bendiek des Stahlverzinkungsunternehmens ZINQ geehrt. buff.ly/QEDIjX0

8 13 83

Flavio Lehner @climateflavors.bsky.social · 23d

Idk of an online source for that specific data but I should have the global means lying around somewhere. Can you send me an email?

The full data is available via MMLEA or ESGF but that's a pain if you just need global mean.
www.cesm.ucar.edu/community-pr...
aims2.llnl.gov/search/cmip6/

Multi-Model Large Ensemble Archives | Community Earth System Model

www.cesm.ucar.edu

1 1

Reposted by Flavio Lehner

Dr. Jeff Masters @drjeffmasters.bsky.social · 28d

“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.”

Ed Maibach @maibached.bsky.social · 28d

Every avoidable death is a tragedy. Smoke from Canada’s wildfires killed nine-year-old Carter Vigh – and 82,000 others around the world. #EndFossilFuels.

@gchalliance.bsky.social
@docsforclimate.bsky.social
@fossilfueltreaty.bsky.social

Smoke from Canada’s wildfires killed nine-year-old Carter Vigh – and 82,000 others around the world

Toxic particles spewed by 2023’s wildfires were even responsible for 22,000 early deaths in Europe, researchers say

www.theguardian.com

3 33 80

Reposted by Flavio Lehner

Zeke Hausfather @hausfath.bsky.social · Sep 9

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!

16 170 580

Flavio Lehner @climateflavors.bsky.social · Sep 8

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).

9

Reposted by Flavio Lehner

Jakob Zscheischler @zscheischlerjak.bsky.social · Aug 29

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

Communications Earth & Environment @commsearth.nature.com · Aug 29

❄️🌧️Reduced snowmelt dominates changes in Northern Europe's largest floods, while heavy precipitation dominates Western Europe flood events.

@bfang.bsky.social @zscheischlerjak.bsky.social

👉Read more here:
www.nature.com/articles/s43...

Diverging trends in large floods across Europe in a warming climate - Communications Earth & Environment

Reduced snowmelt dominates northern Europe’s largest floods variation while heavy precipitation dominates western Europe flood events, according to a joint assessment of changes in the timing, spatial...

www.nature.com

1 6 18

Reposted by Flavio Lehner

Nate Howes TWN @natetwnclimate.bsky.social · Sep 2

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...

Arctic may see single occurrences of ice-free days sooner than predicted - The Weather Network

A recent study presents an alternate take on when the Arctic could see individual instances of ice-free days, with models pinpointing a quicker timeline for than previously thought--as early as this d...

www.theweathernetwork.com

1 1 3