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Dewi Le Bars

@dewilebars

Climate scientist at KNMI in the Netherlands. Maker of sea-level scenarios. Interested in everything climate, vegan food, CrossFit, philosophy and good books. I post in English, Dutch and French.

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22.11.2024
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Latest posts by Dewi Le Bars @dewilebars

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Francesca Albanese et la bassesse des puissants La rapporteuse des Nations unies sur les droits de l’homme dans les territoires palestiniens occupés, Francesca Albanese, se trouve une fois encore exposée à une campagne politique qui la prend pour …

La rapporteuse des Nations unies sur les droits de l’homme dans les territoires palestiniens occupés, Francesca Albanese, est un cauchemar pour les puissants : une femme affranchie de la peur, qui défend les droits des faibles face à l’autorité des protégés. blogs.mediapart.fr/ziad-majed/b...

14.02.2026 18:36 👍 350 🔁 148 💬 7 📌 5
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DCENT‐I: A Globally Infilled Extension of the Dynamically Consistent ENsemble of Temperature Dataset DCENT-I infills data gaps in DCENT, producing spatially coherent temperature fields (top) and a slightly higher GMST warming estimate (bottom). Top: December 1877 temperature anomalies (°C; 1961–1990...

The paper describing the new DCENT-I dataset of monthly global surface temperature since 1850 is just published.

rmets.onlinelibrary.wiley.com/doi/10.1002/...

13.02.2026 11:08 👍 31 🔁 15 💬 3 📌 2

Sure I DM you

14.02.2026 12:17 👍 0 🔁 0 💬 0 📌 0

A further update on bsky.app/profile/bobk... — it turns out if you correct the statistical errors in Michael Schellenberger’s favorite new sea level paper, it (unsurprisingly) shows clear evidence of sea level acceleration

07.02.2026 15:24 👍 58 🔁 22 💬 2 📌 3

I look forward to being auditioned by the Dutch parliament on Monday

Het is tijd om miljardairs te belasten!

31.01.2026 19:44 👍 135 🔁 35 💬 6 📌 2

1. This short thread is about the issue that dominates almost every aspect of politics, and causes or exacerbates most of our problems: the extreme wealth of a small number of people. Here’s the amazing thing: almost the entire political class aligns with the ultra-rich against the rest. 🧵1/10

23.01.2026 11:30 👍 2033 🔁 980 💬 62 📌 149
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AI companies will fail. We can salvage something from the wreckage | Cory Doctorow AI is asbestos in the walls of our tech society, stuffed there by monopolists run amok. A serious fight against it must strike at its roots

Brilliant essay in The Guardian by Cory Doctorow, about why AI will fail and how while doing so it will make everything worse for everbody except the oligarchs. www.theguardian.com/us-news/ng-i...

18.01.2026 20:24 👍 22 🔁 11 💬 1 📌 0
France : démocratie en décrochage

France : démocratie en décrochage

Rapport #LDH #FIDH | France : démocratie en décrochage
Le constat est sans appel, les libertés publiques connaissent une régression profonde et structurelle en France.
↪️ Les autorités françaises doivent urgemment garantir les droits et libertés de toutes et tous.
www.ldh-france.org/f...

18.01.2026 17:31 👍 140 🔁 136 💬 1 📌 3
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Bureau Buitenland | VPRO Met 'Bureau Buitenland' krijg je internationaal nieuws, reportages en geopolitiek. Met gasten die ons op een deskundige en begrijpelijke manier meer grip geven op de snel veranderende wereld.

If you're in the Netherlands (or have a VPN I guess), and would like to know more about our current. #Antarctic fieldwork, sea level rise and how we make projections@bureaubuitenland.bsky.social has a piece about us today, filmed in the field the last 2 weeks...
www.vpro.nl/bureau-buite...

18.01.2026 09:13 👍 7 🔁 2 💬 0 📌 0
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Trump Administration Plans to Break Up NCAR - Eos The Trump administration is planning to dismantle the National Center for Atmospheric Research, one of the world’s leading climate and Earth science research laboratories, according to a statement fro...

Update: A bid to safeguard the National Center for Atmospheric Research failed Thursday after the Senate passed a spending package without an amendment to save the center's funding. eos.org/research-and...

16.01.2026 15:25 👍 79 🔁 40 💬 4 📌 19

it’s honestly incredible to hear a mayor talk like this about transportation and the harm that comes from cars

04.01.2026 15:42 👍 371 🔁 97 💬 2 📌 2
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Les armes décisives contre les pétro-agressions russes, américaines, et autres à venir.

Nous sommes bien à l'âge de l'écologie de guerre.

03.01.2026 17:16 👍 232 🔁 98 💬 17 📌 6
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Aujourd’hui sort mon nouveau livre «Les milliardaires ne paient pas d’impôt sur le revenu et nous allons y mettre fin.»🧵

24.10.2025 09:41 👍 1351 🔁 501 💬 58 📌 43
Screenshot that says "Sea Ice Today" and "Ice Sheets Today" Services Reduced. More information is stated: "Beginning October 15, 2025, NSIDC’s Sea Ice Today and Ice Sheets Today services will be reduced because of non-renewed funding. This means no new monthly and mid-month analysis posts for Sea Ice Today or regular posts for Ice Sheets Today, limited comparison tools, and reduced user support."

Screenshot that says "Sea Ice Today" and "Ice Sheets Today" Services Reduced. More information is stated: "Beginning October 15, 2025, NSIDC’s Sea Ice Today and Ice Sheets Today services will be reduced because of non-renewed funding. This means no new monthly and mid-month analysis posts for Sea Ice Today or regular posts for Ice Sheets Today, limited comparison tools, and reduced user support."

UGH! When will it end. 😭

"Effective October 15, 2025, due to non-renewed funding, NSIDC has suspended or reduced several Sea Ice Today tools and services."

nsidc.org/data/user-re...

15.10.2025 18:54 👍 277 🔁 121 💬 15 📌 13
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Increased future ocean heat uptake constrained by Antarctic sea ice extent Abstract. The ocean takes up over 90 % of the excess heat stored in the Earth system as a result of anthropogenic climate change, which has led to sea level rise and an intensification of marine extre...

Future atmospheric and ocean warming over the 21st century might be larger than previously expected based on a new study by @linusvogt.bsky.social

Linus & I developed the idea during Linus research visit with me at @whoi.edu and turned it then into this paper:

esd.copernicus.org/articles/16/...

02.10.2025 09:20 👍 25 🔁 12 💬 1 📌 3

We used to throw this one around back in the day...

He uses statistics like a drunk uses a lamp post, for support rather than illumination.

29.09.2025 18:29 👍 10 🔁 2 💬 1 📌 0

Je sais pas comment remercier @fabricearfi.bsky.social et toutes celles et ceux qui aujourd'hui tiennent la tranchée face à la déferlante contre notre démocratie.
J'espère que l'entendre aura fait réfléchir nombreux et nombreuses.
Merci.

29.09.2025 20:04 👍 1284 🔁 345 💬 19 📌 5
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Parfois c’est ce qui nous est le plus proche que l’on met le plus de temps à voir.

Pendant quinze ans j’ai cartographié les grandes fortunes mondiales, objectivé leurs techniques pour contourner l’impôt dans les paradis fiscaux, du Luxembourg aux îles vierges britanniques... 🧵

27.09.2025 13:41 👍 981 🔁 570 💬 20 📌 19

Elle pourrait faire mieux : accélérer sur la sortie des fossiles tout court et ainsi bénéficier des bénéfices climat/sante/biodiversité/indépendance des politiques climatiques.

16.09.2025 19:42 👍 11 🔁 4 💬 1 📌 0
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Defra rejects recommendations for whole-site bans on bottom trawling and a new policy statement - Ocean and Coastal Futures Ocean and Coastal Futures - We’re all about connecting people – organising events, creating communications and promoting job opportunities.

⚠️ UK Govt has dismissed the Environmental Audit Committee’s call for full bottom trawling bans in marine protected areas, calling it "disproportionate". Despite the evidence showing full bans are the ONLY way to truly protect ocean wildlife 🌊 1/2
www.cmscoms.com?p=45180

10.09.2025 09:04 👍 30 🔁 20 💬 4 📌 1
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Frontiers | Safeguarding the polar regions from dangerous geoengineering: a critical assessment of proposed concepts and future prospects Fossil-fuel burning is heating the planet with catastrophic consequences for its habitability and for the natural world on which our existence depends. Halti...

New paper out today led by Martin Siegert with about 40 others where we argue that some of the proposed Polar #Geoengineering schemes for ice sheets, sea ice and solar radiation are potentially dangerous and unethical.

www.frontiersin.org/journals/sci...

09.09.2025 18:48 👍 16 🔁 10 💬 0 📌 1

Update on this thread: Thanks to the feedback on this thread, I realized the methodological problems with the Voortman and De Vos (2025) paper (which the New York Post heralded as "Rising-sea hysteria debunked") went deeper than I originally realized, and clearly necessitate retraction. 1/

09.09.2025 02:12 👍 73 🔁 27 💬 4 📌 5

I would love for someone to do an analysis about how an error-ridden paper by unaffiliated researchers in a low-quality journal has gotten such rapid media attention.

05.09.2025 21:51 👍 34 🔁 4 💬 6 📌 1
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⚠️Safe underground carbon storage could reduce warming by 10 times less than previously thought.

New research by @iiasa.ac.at with scientists from @imperialcollegeldn.bsky.social mapped safe areas that can be used for underground carbon storage 🧵

03.09.2025 15:32 👍 26 🔁 13 💬 2 📌 3
A series of maps of emissions across Europe for different livestock

A series of maps of emissions across Europe for different livestock

New data paper out: Ammonia doesn't often make the headlines – but it’s one of the major drivers of biodiversity loss and air pollution in Europe, harming ecosystems and our health. > 90% of it in Europe comes from one source: agricultural fertiliser and manure 🧵

www.nature.com/articles/s41...

27.08.2025 09:51 👍 147 🔁 87 💬 6 📌 10
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Evaluating IPCC Projections of Global Sea‐Level Change From the Pre‐Satellite Era IPCC projections in the mid-1990s of global sea-level change over the next 30 years were remarkably robust The largest disparities between projections and observations were due to underestimated ...

IPCC projections in the mid-1990s of global sea-level change over the next 30 years were remarkably robust - important for confidence in future projections.

The largest disparities were due to underestimated dynamic mass loss of ice sheets

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

27.08.2025 10:26 👍 132 🔁 53 💬 0 📌 4
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Antarctica's sea level contribution:

Meltwater from Antarctica may "put a lid" of freshwater on the Southern Ocean and thereby trap heat there leading to enhanced melting.

New paper by Lambert, Le Bars, van der Linden, Jüling, and Drijfhout

esd.copernicus.org/articles/16/...

13.08.2025 06:15 👍 41 🔁 24 💬 0 📌 0

The Israeli government has adopted the double-strike tactic used by Bashar al-Assad in Syria: target a hospital or heavily populated area, then hit it again when rescue workers, reporters and medics turn up, to kill or maim them too. Hideous war crimes piled one upon another.

26.08.2025 18:35 👍 1107 🔁 371 💬 49 📌 12
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Antarctic Dense Water Formation Sensitivity to Ocean Surface Cell Thickness The ability of ocean models with depth coordinates to form Antarctic Dense Shelf Water (DSW) depends on their surface vertical resolution Deeper surface cells shift the direction of surface Ekman...

We figured out a cheap-ish way to make ocean models create Dense Shelf Waters (DSW) on the surface of the Antarctic continental shelf! How?
Fast answer: Ocean surface cells thinner than 1 m!
Long answer on the paper: dx.doi.org/10.1029/2024...
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More info in the thread

25.07.2025 02:54 👍 15 🔁 10 💬 1 📌 2
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Constraining local ocean dynamic sea-level projections using observations Abstract. The redistribution of ocean water volume under ocean–atmosphere dynamical processes results in sea-level changes. This process, called ocean dynamic sea level (ODSL) change, is expected to b...

We are now thinking about generalising this method to the whole world so it can be used for the next IPCC projections and help coastal decision makers around the world rather than only along the Dutch coast.
os.copernicus.org/articles/21/...

14.07.2025 10:43 👍 1 🔁 0 💬 0 📌 0