Dewi Le Bars
@dewilebars.bsky.social
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.
Interested in everything climate, vegan food, CrossFit, philosophy and good books.
I post in English, Dutch and French.
Reposted by Dewi Le Bars
Aujourd’hui sort mon nouveau livre «Les milliardaires ne paient pas d’impôt sur le revenu et nous allons y mettre fin.»🧵
October 24, 2025 at 9:41 AM
Aujourd’hui sort mon nouveau livre «Les milliardaires ne paient pas d’impôt sur le revenu et nous allons y mettre fin.»🧵
Reposted by Dewi Le Bars
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...
"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...
October 15, 2025 at 6:54 PM
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...
"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...
Reposted by Dewi Le Bars
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/...
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/...
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...
esd.copernicus.org
October 2, 2025 at 9:20 AM
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/...
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/...
Reposted by Dewi Le Bars
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.
He uses statistics like a drunk uses a lamp post, for support rather than illumination.
September 29, 2025 at 6:29 PM
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.
He uses statistics like a drunk uses a lamp post, for support rather than illumination.
Reposted by Dewi Le Bars
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.
J'espère que l'entendre aura fait réfléchir nombreux et nombreuses.
Merci.
Je préfère écouter les gens qui connaissent le dossier, c’est bien plus intéressant.
September 29, 2025 at 8:04 PM
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.
J'espère que l'entendre aura fait réfléchir nombreux et nombreuses.
Merci.
Reposted by Dewi Le Bars
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... 🧵
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... 🧵
September 27, 2025 at 1:41 PM
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... 🧵
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... 🧵
Reposted by Dewi Le Bars
Elle pourrait faire mieux : accélérer sur la sortie des fossiles tout court et ainsi bénéficier des bénéfices climat/sante/biodiversité/indépendance des politiques climatiques.
Russia’s war economy, sustained by revenues from fossil fuels, is financing the bloodshed in Ukraine.
To put an end to it, the Commission will propose speeding up the phase-out of Russian fossil imports.
To put an end to it, the Commission will propose speeding up the phase-out of Russian fossil imports.
September 16, 2025 at 7:42 PM
Elle pourrait faire mieux : accélérer sur la sortie des fossiles tout court et ainsi bénéficier des bénéfices climat/sante/biodiversité/indépendance des politiques climatiques.
Reposted by Dewi Le Bars
⚠️ 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
www.cmscoms.com?p=45180
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.
www.cmscoms.com
September 10, 2025 at 9:04 AM
⚠️ 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
www.cmscoms.com?p=45180
Reposted by Dewi Le Bars
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...
www.frontiersin.org/journals/sci...
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...
www.frontiersin.org
September 9, 2025 at 6:48 PM
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...
www.frontiersin.org/journals/sci...
Reposted by Dewi Le Bars
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/
I had an engagement with blogger, failed California gubernatorial candidate, and self-identified reporter Michael Shellenberger this past week, which started out being about this new paper being heralded by climate skeptics as disproving global sea-level acceleration. (LONG 🧵)
September 9, 2025 at 2:13 AM
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/
Reposted by Dewi Le Bars
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.
September 5, 2025 at 9:51 PM
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.
Reposted by Dewi Le Bars
⚠️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 🧵
New research by @iiasa.ac.at with scientists from @imperialcollegeldn.bsky.social mapped safe areas that can be used for underground carbon storage 🧵
September 3, 2025 at 3:34 PM
⚠️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 🧵
New research by @iiasa.ac.at with scientists from @imperialcollegeldn.bsky.social mapped safe areas that can be used for underground carbon storage 🧵
Reposted by Dewi Le Bars
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...
www.nature.com/articles/s41...
August 27, 2025 at 9:51 AM
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...
www.nature.com/articles/s41...
Reposted by Dewi Le Bars
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/...
The largest disparities were due to underestimated dynamic mass loss of ice sheets
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
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 ...
agupubs.onlinelibrary.wiley.com
August 27, 2025 at 10:26 AM
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/...
The largest disparities were due to underestimated dynamic mass loss of ice sheets
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Reposted by Dewi Le Bars
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/...
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/...
August 13, 2025 at 6:15 AM
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/...
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/...
Reposted by Dewi Le Bars
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.
August 26, 2025 at 6:35 PM
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.
Reposted by Dewi Le Bars
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...
----
More info in the thread
Fast answer: Ocean surface cells thinner than 1 m!
Long answer on the paper: dx.doi.org/10.1029/2024...
----
More info in the thread
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...
dx.doi.org
July 25, 2025 at 2:54 AM
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...
----
More info in the thread
Fast answer: Ocean surface cells thinner than 1 m!
Long answer on the paper: dx.doi.org/10.1029/2024...
----
More info in the thread
We have a new paper out in Ocean Science together with Iris Keizer and Sybren Drijfhout:
os.copernicus.org/articles/21/...
This work was part of the development of new climate scenarios for the Netherlands so we focused on the Dutch coast:
cdn.knmi.nl/system/ckedi...
os.copernicus.org/articles/21/...
This work was part of the development of new climate scenarios for the Netherlands so we focused on the Dutch coast:
cdn.knmi.nl/system/ckedi...
LinkedIn
This link will take you to a page that’s not on LinkedIn
lnkd.in
July 14, 2025 at 10:43 AM
We have a new paper out in Ocean Science together with Iris Keizer and Sybren Drijfhout:
os.copernicus.org/articles/21/...
This work was part of the development of new climate scenarios for the Netherlands so we focused on the Dutch coast:
cdn.knmi.nl/system/ckedi...
os.copernicus.org/articles/21/...
This work was part of the development of new climate scenarios for the Netherlands so we focused on the Dutch coast:
cdn.knmi.nl/system/ckedi...
Reposted by Dewi Le Bars
Was chatting to one of my most brilliant Physics students yesterday and he had no idea how mechanical watches work and was fascinated by the fact that they make use of such basic Physics principles and the history of how watchmakers have overcome various limitations on accuracy. Shared this with him
Mechanical Watch – Bartosz Ciechanowski
Interactive article explaining how a mechanical watch works.
ciechanow.ski
July 12, 2025 at 6:41 AM
Was chatting to one of my most brilliant Physics students yesterday and he had no idea how mechanical watches work and was fascinated by the fact that they make use of such basic Physics principles and the history of how watchmakers have overcome various limitations on accuracy. Shared this with him
Reposted by Dewi Le Bars
met dank aan de intensieve veehouderij! 🐷🐄🐔
"Blauwalg ontstaat meestal in warm, stilstaand water dat rijk is aan voedingsstoffen zoals fosfor en stikstof."
bron: alles-over-water.nl
"Blauwalg ontstaat meestal in warm, stilstaand water dat rijk is aan voedingsstoffen zoals fosfor en stikstof."
bron: alles-over-water.nl
Op tientallen zwemlocaties waarschuwing voor blauwalg
Op tientallen zwemlocaties waarschuwing voor blauwalg
Op twee locaties is zwemmen zelfs verboden omdat het water niet veilig genoeg is.
nos.nl
June 29, 2025 at 5:52 PM
met dank aan de intensieve veehouderij! 🐷🐄🐔
"Blauwalg ontstaat meestal in warm, stilstaand water dat rijk is aan voedingsstoffen zoals fosfor en stikstof."
bron: alles-over-water.nl
"Blauwalg ontstaat meestal in warm, stilstaand water dat rijk is aan voedingsstoffen zoals fosfor en stikstof."
bron: alles-over-water.nl
Reposted by Dewi Le Bars
Increase in methane emissions from fossil fuels has been underestimated. Our new PNAS paper just published today:
www.pnas.org/doi/epub/10....
www.pnas.org/doi/epub/10....
June 13, 2025 at 4:52 PM
Increase in methane emissions from fossil fuels has been underestimated. Our new PNAS paper just published today:
www.pnas.org/doi/epub/10....
www.pnas.org/doi/epub/10....
Reposted by Dewi Le Bars
The plunder of our seas by industrial fishing is a monstrosity in which almost everyone unwittingly collaborates. For decades this truth has been deliberately hidden from us. Now at last the consensus is cracking.
This week's column.
www.theguardian.com/commentisfre...
This week's column.
www.theguardian.com/commentisfre...
Attenborough’s Ocean is the film I’ve been waiting my whole career for – now the world must act on its message | George Monbiot
The documentary shows the damage that fishing does to our planet. So why does the industry still hold governments to ransom? asks Guardian columnist George Monbiot
www.theguardian.com
June 13, 2025 at 9:24 AM
The plunder of our seas by industrial fishing is a monstrosity in which almost everyone unwittingly collaborates. For decades this truth has been deliberately hidden from us. Now at last the consensus is cracking.
This week's column.
www.theguardian.com/commentisfre...
This week's column.
www.theguardian.com/commentisfre...
Reposted by Dewi Le Bars
Ecologically illiterate, cruel and self-serving industry propaganda, channelled uncritically by the BBC. So much for informed reporting. So much for impartiality. www.bbc.co.uk/news/article...
Big octopus catch by Newlyn boat 'does fishing industry a favour'
Crew members of a Cornwall beam trawler celebrate after the huge catch adds to a haul worth £158k.
www.bbc.co.uk
June 13, 2025 at 11:47 AM
Ecologically illiterate, cruel and self-serving industry propaganda, channelled uncritically by the BBC. So much for informed reporting. So much for impartiality. www.bbc.co.uk/news/article...
Reposted by Dewi Le Bars
Merci à @france3centre.bsky.social pour cette émission "dimanche en politique" sur un sujet tout particulièrement politique: le changement climatique.
www.france.tv/7131284-null...
www.france.tv/7131284-null...
www.france.tv
May 11, 2025 at 1:06 PM
Merci à @france3centre.bsky.social pour cette émission "dimanche en politique" sur un sujet tout particulièrement politique: le changement climatique.
www.france.tv/7131284-null...
www.france.tv/7131284-null...
Reposted by Dewi Le Bars
This is horrible. I don't even know what to say. Some of our most key polar data.
"As a result, the level of services for affected products below will be reduced to Basic—meaning they will remain accessible but may not be actively maintained, updated, or fully supported."
nsidc.org/data/user-re...
"As a result, the level of services for affected products below will be reduced to Basic—meaning they will remain accessible but may not be actively maintained, updated, or fully supported."
nsidc.org/data/user-re...
May 6, 2025 at 8:08 PM
This is horrible. I don't even know what to say. Some of our most key polar data.
"As a result, the level of services for affected products below will be reduced to Basic—meaning they will remain accessible but may not be actively maintained, updated, or fully supported."
nsidc.org/data/user-re...
"As a result, the level of services for affected products below will be reduced to Basic—meaning they will remain accessible but may not be actively maintained, updated, or fully supported."
nsidc.org/data/user-re...