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Pierre Friedlingstein

@pfriedling.bsky.social

Born at 321 ppm. Climate & Carbon Cycle Scientist. Prof @UniofExeter Directeur de Recherche @CNRS @GlobalCarbonProject

551 Posts8712 Follower 436 Folgt

Pierre Friedlingstein @pfriedling.bsky.social · 4w ago

www.lemonde.fr/idees/articl...

Canicule : « Tant que l’industrie fossile continuera d’ignorer les lois de la physique, les événements climatiques extrêmes gagneront en intensité et en fréquence »

TRIBUNE. Un collectif de personnalités engagées dans la lutte contre le dérèglement climatique estime, dans une tribune au « Monde », qu’une loi d’urgence climatique est nécessaire pour arrêter l’expa...

lemonde.fr

Pierre Friedlingstein @pfriedling.bsky.social · last mo.

www.lemonde.fr/sciences-au-...

Mésinformation climatique, qui est responsable ?

Lorsque sur un plateau TV un climatologue entend un journaliste dire que les scientifiques « n’ont pas été assez clairs » sur le changement climatique, il a le droit de s’énerver. Mais alors, qui accu...

lemonde.fr

Pierre Friedlingstein @pfriedling.bsky.social · last mo.

Comme un sentiment de gros ras le bol… www.lefigaro.fr/vox/societe/...

«La France n’est pas prête au climat d’aujourd’hui et encore moins à celui de demain» : l’alerte de 26 scientifiques

FIGAROVOX/TRIBUNE - En marge d’une rencontre avec Giorgia Meloni, Emmanuel Macron a affirmé qu’on ne pouvait pas s’adapter «à un pic [de chaleur] qui n’a pas d’équivalent aujourd’hui». Vingt-six scien...

lefigaro.fr

Robbie Andrew @robbieandrew.bsky.social · 2mo ago

Have you read my deep-dive history of estimating global CO₂ emissions? From the first documented effort by Högbom in 1894, via Arrhenius, Popular Mechanics, Plass, Revelle, and more through to 1999: robbieandrew.github.io/www_docs/t/E...

Pierre Friedlingstein @pfriedling.bsky.social · 2mo ago

Michael E. Mann@michaelemann.bsky.social · 2mo ago

"Sorry, climate change is still dangerous, no matter what nonsense Trump emits" | @doctorvive.bsky.social & I discuss the latest fossil-fueled climate disinformation narrative platformed by Trump and other bad actors in @thebulletin.org: thebulletin.org/2026/05/sorr...

Pierre Friedlingstein @pfriedling.bsky.social · 3mo ago

Exeter will host the 12th International Carbon Dioxide Conference (ICDC12), 21-25 June 2027. These CO₂ conferences have been running every 4 years since 1981 ! You can register your interest at icdc12.org. Call for abstract will open later this summer. #ICDC12

Welcome to the 12th International Carbon Dioxide Conference

icdc12.org

Global Systems Institute@gsiexeter.bsky.social · 3mo ago

Join us at the University of Exeter for ICDC12 (21–25 June 2027, Exeter, UK) — the leading global carbon cycle conference. Scientists, experts & decision-makers will connect ahead of the second Global Stocktake. Register your interest: ICDC12.org #ICDC12 #GlobalCarbonBudget #CarbonCycle

Daniel Ospina @daniel-ospina.bsky.social · 6mo ago

*DEADLINE EXTENDED* February 8 Submit your suggestions and nominate (yourself or others) as a co-author for the 2026 edition of the 10 New Insights in Climate Science

Future Earth@futureearth.bsky.social · 7mo ago

What climate insights are policymakers missing? If you’re working on new or emerging climate research, now’s the time to surface it. Help shape the 2026 10 New Insights in Climate Science. Submit by 31 Jan 2026: form.jotform.com/Future_Earth...

Prof Rachel Oliver @profrachelgan.bsky.social · 7mo ago

Following coverage over the weekend of Sir Paul Nurse's comments that suggested that the only reason that a Fellow should be expelled from @royalsociety.org is scientific misconduct, I have written to him to explain the risks such an attitude poses of increasing sexual harassment in STEM.

Dear Sir Paul,

Re: Royal Society Code of Conduct

I am sure that many scientists have written to you about the specific question of Elon Musk’s Fellowship and whether, under the Royal Society’s Code of Conduct, his retaining that Fellowship is appropriate. I will not rehash these issues. Instead, as a female scientist with extensive experience of activities aiming to increase equality, diversity and inclusion in the engineering and physical sciences sector, I am writing to you (in a personal capacity) to ask you to reconsider the statements you have recently made in this context to the UK press about the Royal Society’s Code of Conduct and how it is applied.

A 2018 report from the joint National Academies of the United States of America, concluded that “sexual harassment is common in academic science, engineering, and medicine” and that “greater than 50 percent of women faculty and staff and 20–50 percent of women students encounter or experience sexually harassing conduct in academia”. This report described codes of conduct that make clear that sexual harassment is unethical and will not be tolerated as a “powerful incentive for change”. The authors also noted that sexual harassment can have significant and damaging effects on the integrity of research. In my own praxis, I have found that clear and consistently-implemented codes of conduct that address these issues make female scientists and engineers safer, and allow them to focus more effectively on their research. For codes of conduct to have such a positive effect, it is vital that sanctions for actions which transgress the code are meaningful and substantial.

I was hence aghast to realise that in an interview with the Financial Times published on 9/1/26, you appear to have suggested that the Royal Society “should only expel fellows if their science proved “faulty or fraudulent or highly defective””. Moreover, in a further interview with the Guardian on 11/1/26 you suggested that the code “may need to be looked at again”, with the implication that your aim would be to remove the option of sanctions on Fellows for reasons not strictly related to faults or defects in their research.

I suggest that changing the Royal Society’s code of conduct so that the likelihood of serious sanctions for sexual harassment is reduced, would directly endanger women who interact with the Royal Society at events or otherwise, and would provide a licence to harass to the already powerful people on whom the Society bestows fellowship. The implications of your words - that under your leadership the only infringements of the code which are likely to receive the sanction of the Fellowship being removed are those related to research misconduct - already risk empowering harassers. You stated, in the Financial Times interview, that “there’s many bad people around, but they have made scientific advances”. Given this awareness of the possibility of bad actors in our scientific community, it is wholly irresponsible to suggest that the Royal Society would not act to sanction these people if they harass more vulnerable scientists.

I am hence writing to request that you retract any suggestion that the Society’s Code of Conduct should be changed so that the only reason a Fellow might be sanctioned by the removal of their Fellowship is “faulty or fraudulent or highly defective” research. This action is necessary to safeguard female scientists, a requirement placed on the Society by safeguarding legislation and UK statutory guidance.

Yours sincerely,

Professor Rachel A. Oliver.

Andrew Dessler @andrewdessler.com · 7mo ago

I'm starting to get the emails. Reporters: please see my comments below.

Andrew Dessler@andrewdessler.com · 5y ago

It's the most magical time of the year — when estimates of last year's global average temperature anomaly come out. Time to dust off my "last year was hot" auto-response.

Zeke Hausfather @zekehausfather.com · 8mo ago

I've put together my predictions for 2026 and 2027 temperatures over at The Climate Brink. I expect 2026 will likely end up similar to 2023 and 2025 at ~1.4C, while 2027 will likely be considerably warmer (conditional on El Nino): www.theclimatebrink....

Pep Canadell @pepcanadell.bsky.social · 8mo ago

The Global Carbon Project has just published the most comprehensive Global Hydrogen Budget to date. H2, although not a GHG, has an indirect Global Warming Potential 37 times more potent than CO2. Carbon Brief: www.carbonbrief.org/hydrogen-emi... Research paper: www.nature.com/articles/s41...

Hydrogen emissions are ‘supercharging’ the warming impact of methane - Carbon Brief

The warming impact of hydrogen has been “overlooked” in projections of climate change, authors of the latest “global hydrogen budget” say.

carbonbrief.org

Marshall Shepherd @drshepherd2013.bsky.social · 8mo ago

Please read www.forbes.com/sites/marsha...

Kate Marvel @drkatemarvel.bsky.social · 8mo ago

I really wish we'd stop calling them climate "skeptics" or "vaccine skeptics", if you jump off a cliff we don't call you a "gravity skeptic"

Pierre Friedlingstein @pfriedling.bsky.social · 8mo ago

For once, some good news about the Amazon tropical forest 🌳 www.nature.com/articles/s41...

Increasing tree size across Amazonia - Nature Plants

A global research network monitoring the Amazon for 30 years reports in this study that tree size increased by 3% each decade.

nature.com

ESM2025 @esm2025.bsky.social · 8mo ago

Eager for more details? 👀 Check our full Research Highlight here:bit.ly/4qMYPEy With @docaharper.bsky.social from @universityofga.bsky.social @exeter.ac.uk, Gabriel Abrahão, from @pik-potsdam.bsky.social and @rosieafisher.bsky.social, from @cicero.oslo.no

Can We Count on the Land? Exploring the Uncertainty of Land-based Mitigation Strategies

How Earth System Models assess land-based carbon removal (AR, BECCS): carbon-cycle responses, and local climate side-effects; and how Integrated Assessment Models then asses socio-economic constraints that shape decision-ready deployment.

esm2025.eu

Pierre Friedlingstein @pfriedling.bsky.social · 9mo ago

👏

Rishika Pardikar@rishpardikar.bsky.social · 9mo ago

At #COP30 last week, India highlighted the impossibility of 1.5C and the reliance on CDR for overshoot scenarios. Interview with @glenpeters.bsky.social about Paris Agreement temperature goals, where we need to go and how to get there. drilled.media/news/cop30-g...

Pierre Friedlingstein @pfriedling.bsky.social · 9mo ago

👏 “When it comes to climate change, the “end of the world” and “good for you” are “the two lowest-probability outcomes”. www.nature.com/articles/d41...

Bill Gates’s climate comments are a dangerous distraction

People do not have to dismiss or exaggerate the climate threat to justify concerted action.

nature.com

Michael E. Mann @michaelemann.bsky.social · 9mo ago

Direct air capture is not currently viable strategy. Likely increases carbon pollution (more carbon energy required to than saved). See @mzjacobson.bsky.social's work: news.stanford.edu/stories/2019... & Joe Romm's review for our center (@penncssm.bsky.social): bpb-us-w2.wpmucdn.com/web.sas.upen...

Study casts doubt on carbon capture

Current approaches to carbon capture can increase air pollution and are not efficient at reducing carbon in the atmosphere, according to research from Mark Z. Jacobson.

news.stanford.edu

Audrey Garric @audreygarric.bsky.social · 9mo ago

Au GIEC, une bataille très politique autour des dates de publication du prochain rapport d’évaluation. Pour la 4e fois en 2 ans, les pays n’ont pas réussi à s’accorder sur son calendrier. Certains pays veulent repousser sa parution pour amoindrir l’action climatique www.lemonde.fr/planete/arti...

Au GIEC, une bataille très politique autour des dates de publication du prochain rapport d’évaluation

Pour la quatrième fois en deux ans, les pays n’ont pas réussi à s’accorder sur le calendrier du rapport phare du groupe d’experts du climat. Certains pays veulent repousser sa parution pour amoindrir ...

lemonde.fr

Our World in Data @ourworldindata.org · 9mo ago

How much CO₂ can the world emit while limiting global temperature rise?

Bar chart showing estimates of remaining carbon dioxide budgets that give a 50% likelihood of staying below each temperature level, relative to pre-industrial levels.

A baseline label shows global emissions in 2025 at 42 gigatonnes (Gt) per year. Three vertical bars show remaining CO2 budgets: stay below 1.5°C — 170 Gt, labeled as 4 years of current emissions, with a note that if emissions stay at 2025 levels the 1.5°C budget will be exhausted within 4 years; stay below 1.7°C — 525 Gt, labeled as 12.5 years of current emissions; stay below 2°C — 1055 Gt, labeled as 25 years of current emissions, with an annotation saying that by 2050 we will have exhausted the 2°C budget unless emissions are reduced now. Footer note states these estimates have uncertainty and depend on changes in non-CO2 greenhouse gases such as methane and nitrous oxide. Data sources listed as IPCC, Forster et al. (2025) and Global Carbon Project (2025). License CC BY.

Pierre Friedlingstein @pfriedling.bsky.social · 9mo ago

Published today in Earth System Science Data: The Global Carbon Budget 2025 essd.copernicus.org/preprints/es...

Global Carbon Budget 2025

Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere in a changing climate is critical to bette...

essd.copernicus.org

Pierre Friedlingstein @pfriedling.bsky.social · 9mo ago

How about massively reducing emissions first ? www.theguardian.com/environment/...

Removing CO2 from atmosphere vital to avoid catastrophic tipping points, leading scientist says

10bn tonnes must be captured from the air every year to limit global heating to 1.7C, says Johan Rockström

theguardian.com

Pierre Friedlingstein @pfriedling.bsky.social · 9mo ago

😇

University of Exeter@exeter.ac.uk · 9mo ago

It was great to hear @pfriedling.bsky.social on BBC Radio 4 today discussing the carbon cycle as part of #COP30. Listen back at: www.bbc.co.uk/sounds/play/...

Vert, le média 💚@vert.eco · 9mo ago

🤝 À l’occasion de la COP21, près de 200 pays s’engageaient pour la 1ère fois à lutter collectivement contre le réchauffement climatique en votant l’Accord de Paris. 10 ans plus tard, lors de l'ouverture de la COP30 sur le climat à Belém, où en sommes-nous ? Le tour en 5 graphiques 👇

Réchauffement, CO2, renouvelables, transport, déforestation : cinq graphs clés, dix ans après l’Accord de Paris sur le climat

Accord mais vain ? À l’occasion de la COP21, le 12 décembre 2015, près de 200 pays s’engageaient pour la première fois à lutter collectivement contre le réchauffement climatique en votant l’Accord de ...

vert.eco

Pep Canadell @pepcanadell.bsky.social · 9mo ago

As part of the GCP-Regional Carbon Cycle Assessment and Processes-2, we recently published the Australasia's CH4 and N2O Budgets. The carbon budget was published in 2023, both papers, led by Yohanna Villalobos and a great team of collaborators. agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Veronika Meduna @veronikameduna.bsky.social · 9mo ago

The US is not expected to send high-level representatives to COP30, and many say that’s for the best. Whether humanity bends the emissions curve sufficiently to escape the most dangerous climate impacts now depends on the actions of other big players www.nature.com/articles/d41...

How to fight climate change without the US: a guide to global action

With the US government absent from the COP30 global climate summit, it will be up to others to avert catastrophe.

nature.com

Alexandra Delbot @alexandradelbot.bsky.social · 10mo ago

Une nouvelle étude pointe les faiblesses structurelles de la compensation carbone : bénéfices surestimés, risques de fuite et stockage seulement temporaire du CO₂. Ce système, censé lutter contre la déforestation, peine à prouver son efficacité réelle. Explications en GIF 🌳

Déforestation : pourquoi la compensation carbone est inefficace

Une nouvelle étude pointe les faiblesses structurelles de la compensation carbone : bénéfices surestimés, effets déplacés et stockage temporaire du CO₂. Ce système, censé lutter contre la déforestatio...

radiofrance.fr

Pierre Friedlingstein @pfriedling.bsky.social · 10mo ago

👏

Dr. Genevieve Guenther (she/they)@doctorvive.bsky.social · 10mo ago

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. 🧵

CLIMATEWIRE
Climate critics try to discredit IPCC author for linking
disasters to global warming
By LESLEY CLARK, SARA SCHONHARDT, CHELSEA HARVEY | 10/09/2025
06:22 AM EDT Roger Pielke Jr. and oil industry supporters are attacking climate scientist Friederike Otto, whose
work has been used in lawsuits against polluters.

Pierre Friedlingstein @pfriedling.bsky.social · 10mo ago

Definitely worth a read.

Dr. Jonathan Foley@globalecoguy.bsky.social · 10mo ago

The jig is up for CCS and DAC. oilprice.com/Energy/Energ...

Pierre Friedlingstein @pfriedling.bsky.social · 11mo ago

It is difficult to get a man to understand something when his salary depends upon his not understanding it. (Upton Sinclair) www.reuters.com/sustainabili...

Trump tells UN that climate change is a 'con job'

President Donald Trump dismissed climate change as “the greatest con job” in the world during his address to the United Nations General Assembly on Tuesday, doubling down on his skepticism of global environmental initiatives and multilateral institutions.

reuters.com