Natassa Romanou

Bridging Physics & AI in Climate Modeling 🌍🤖

Introducing JCM v1.0: A fully differentiable, intermediate-complexity atmospheric model built in Python/JAX.

Training hybrid models is hard because legacy code lacks gradients. JCM solves this.

430,000-Year-Old Wooden Tools Are the Oldest Ever Found

My village made it to New York Times (and Science and PNAS). www.nytimes.com/2026/01/26/s... Great work @katharv.bsky.social

🥵 2024 El Niño pushed us over 1.5°C, making it the hottest year on record:

heatwaves
floods
hunger for +110 mln people
$3.4 trn in costs

Could such extremes trigger tipping points too?

@aromanou.bsky.social #NASA explains in next #ClimTipWebinar

Join 👉 3 Feb 2–3pm CET
bit.ly/climtip-webi...

It appears that this legend owns a little bookstore — and you can order books from him instead of Bezos. Link in next post.

Checks out

Me too!

Only well-off AAAS fellows are "ok"; the rest of us aren't.

If the science minibus passes, the decimation remains. Colette notes NIH ECRs are crushed. NCAR is not explicitly protected. Money won't arrive before a 5% grant success rate at NASA planetary forces more ECRs out after the 20% NASA RIF.

Published today in "Ocean Heat Content Sets Another Record in 2025", by Pan et al.

Link: link.springer.com/article/10.1...

What are data centers? Expert explains AI boom, energy concerns Why are data centers so controversial in the communities where tech companies want to build them?

I talked with @wuwmradio.bsky.social about data centers and how they affect the environment: www.wuwm.com/what-are-dat...

Successful Liquid Lake Conditions in a Cold Martian Paleoclimate - Eos Simulations from a new lake model explain how liquid water could have been maintained over Mars in a cold climate, thus resolving a critical scientific gap in our understanding of Mars’ early history.

🌟 Editor's Pick! 🌟

“Simulations from a new lake model explain how liquid water could have been maintained over Mars in a cold climate, thus resolving a critical scientific gap in our understanding of Mars’ early history.”

🔗 eos.org/editor-highl...

#AGUPubs
@AGU_Eos

In 2025, the Ocean Stored a Record-Breaking Amount of Heat, Again - Eos The ocean soaked up more heat last year than any year since modern measurements began around 1960, according to a new analysis published in Advances in Atmospheric Science.

The ocean keeps getting hotter: In 2025, it absorbed 23 zettajoules (that’s 23 * 10²¹ joules) of heat, breaking a record for the ninth consecutive year. 🧪🌎🌊 eos.org/research-and...

@agu.org should give the social media person at Eos a raise.

Starting 2026 with a bang, our paper is published! 🎉🎉🎉

In it, we explored how polar amplification depends on the underlying climate state, with implications for understanding the past and future evolution of polar climate change!

Enjoy! :)

agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL118423

Υπάρχει ελπίδα να το δούμε σύντομα στη Νέα Υόρκη?@gavgero.bsky.social

YouTube video by SmallPlanet Mankind's Folly | Official Trailer | English Version

Have you seen the permafrost? Me neither. Catch a glimpse of its perils though in Yorgos Avgeropoulos' documentary (trailer here). www.youtube.com/watch?v=U1mF... #climatecrisis #fossilfuels #arctic

The ocean absorbs excess human emitted CO₂ from the atmosphere, and through a series of reactions, decreases seawater pH in a process known as #OceanAcidification. #OADayofAction 🧪🌊🦑

www.pmel.noaa.gov/co2/file/Haw...

📈 by #NOAA and UH Mānoa

How a Move to the Shallows 300,000 Years Ago Drove a Phytoplankton Bloom - Eos And what that could mean for today’s ocean.

Do alkalinity or nutrient levels have a bigger impact on marine phytoplankton? New research from @eth-eaps.bsky.social provides answers, with ramifications for oceanic carbon cycles and climate change. eos.org/research-spo...

Daily global temperature anomalies from 1940 to present, grouped by year, showing gradual global warming

2025 goes down as the ~3rd-warmest year on record (based on ERA5).

Like in 2024, every single day this past year was warmer than the average of even the most recent reference period (1991-2020).

Marine Heat Waves Can Exacerbate Heat and Humidity over Land - Eos Researchers found the unprecedented 2023 East Asian marine heat wave increased land temperatures and humidity by up to 50%.

Marine heat waves can make heat over land much worse.

Global mean surface temperature anomalies for each year from 1891 to 2025. There is interannual variability and a long-term warming trend. 5-year running means and a long-term linear trend line are also shown (0.79°C per century).

🚨 The first preliminary analysis from the Japan Meteorological Agency highlights 2025 as the third warmest year on record globally (since at least 1891 in this data).

Additional climate rankings will be released later for other datasets.

Graph and methods by ds.data.jma.go.jp/tcc/tcc/prod...

Scientists and PBS reporter Miles O'Brien on their way to Thwaites Glacier www.pbs.org/newshour/sho...

I want to put two hearts to that one! Maybe even three!

oh so yes!

Well, my very very close second choice.

And to my GISS family to take back our building. #GISS

And to New York City especially, to show everyone how it's done. #Mamdani_mayor

Here's to 2026! More jobs for scientists, more papers, more good science, and a brilliant FOD! Peace and love to the world. Let's crash it!

Under an archway that reads “CITY HALL,” Zohran Mamdani stands on subway stairs with his right hand raised. He is being sworn in by Letitia James, the state attorney general, as he rests his left hand upon a Quran held by his wife, Rama Duwaji. A headline reads: "Zohran Mamdani Is Sworn In As Mayor of New York City." Photo by Amir Hamja for The New York Times.

Zohran Mamdani was officially sworn in as mayor of New York City early on Thursday, just after the New Year’s Eve ball dropped in Times Square. www.nytimes.com/2025/12/31/n...

Good morning. Let's make a collective resolution: this will be the year in which we start to turn things round.