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Pierre Friedlingstein @pfriedling.bsky.social · 18/09/2026

Sad news. Bob was the godfather of land surface modeling.

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Kevin Anderson @kevinclimate.bsky.social · 10/09/2026

I was asked by a colleague from my oil & gas days (who has remained in the industry) why UK producing its own gas is less acceptable to the Greens (& others) than importing it from America and West Africa.' The full question & my reply is now online at: climateuncensored.com/there-is-no-...

climateuncensored.com

There Is No Atmospheric Exemption for British Oil and Gas - Climate Uncensored

I was recently contacted by a colleague from my days in the 1980s and 90s when I worked as an engineer in the offshore oil and gas sector. He remains in the

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Pierre Friedlingstein @pfriedling.bsky.social · 11/08/2026

The call for abstract for the 12th International Carbon Dioxide Conference (ICDC12) is open.

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Robbie Andrew @robbieandrew.bsky.social · 01/06/2026

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...

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Pierre Friedlingstein @pfriedling.bsky.social · 19/05/2026

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

icdc12.org

Welcome to the 12th International Carbon Dioxide Conference

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Daniel Ospina @daniel-ospina.bsky.social · 05/02/2026

*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

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Prof Rachel Oliver @profrachelgan.bsky.social · 12/01/2026

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.

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Andrew Dessler @andrewdessler.com · 05/01/2026

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

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Zeke Hausfather @zekehausfather.com · 20/12/2025

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....

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Pep Canadell @pepcanadell.bsky.social · 18/12/2025

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...

carbonbrief.org

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.

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Marshall Shepherd @drshepherd2013.bsky.social · 19/12/2025

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

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Kate Marvel @drkatemarvel.bsky.social · 25/11/2025

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"

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Pierre Friedlingstein @pfriedling.bsky.social · 18/11/2025

👏 “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...

nature.com

Bill Gates’s climate comments are a dangerous distraction

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

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Michael E. Mann @michaelemann.bsky.social · 15/11/2025

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...

news.stanford.edu

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.

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Audrey Garric @audreygarric.bsky.social · 15/11/2025

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...

lemonde.fr

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 ...

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Our World in Data @ourworldindata.org · 15/11/2025

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.

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Vert, le média 💚 @vert.eco · 10/11/2025

🤝 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 👇

vert.eco

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 ...

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Pep Canadell @pepcanadell.bsky.social · 04/11/2025

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/...

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Veronika Meduna @veronikameduna.bsky.social · 04/11/2025

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...

nature.com

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.

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Alexandra Delbot @alexandradelbot.bsky.social · 22/10/2025

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 🌳

radiofrance.fr

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...

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CNRS @cnrs.fr · 09/09/2025

To rehabilitate the general view of women's contributions to the history of science, the CNRS is part of a commission that aims to inscribe the names of 72 female scientists on the Eiffel Tower. 🗼 #WomenInScience

cnrs.fr

Women scientists to be showcased on the Eiffel Tower soon

To rehabilitate the general view of women's contributions to the history of science, the CNRS is part of a commission that aims to inscribe

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Haut conseil pour le climat @hc-climat.bsky.social · 05/09/2025

🌍 Un engagement ambitieux de l’Europe pour 2040 est indispensable pour maintenir vivants les objectifs de l’Accord de Paris. La position de la France fait peser un risque important sur l’adoption par l'UE d’objectifs à la mesure du défi climatique. ➡️ www.hautconseilclimat.fr/actualites/o...

hautconseilclimat.fr

Objectif climatique européen 2040 et COP 30 : une proposition de la France menace l’Accord de Paris — Haut Conseil pour le Climat

Paris, le 5 septembre 2025 – Au moment des négociations européennes sur les objectifs climatiques de l’Union européenne pour la […]

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Pierre Friedlingstein @pfriedling.bsky.social · 03/09/2025

A 0.7°C cooling at best from all geological carbon storage. So could 2.2°C be seen as the maximum allowed overshoot temperature ? 🤓

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Pierre Friedlingstein @pfriedling.bsky.social · 02/09/2025

Great news study of the global ocean carbon sink response to the 2023 warming conditions

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John Morales @johnmoralestv.bsky.social · 28/08/2025

The @ametsoc.org responds to the the regime's Department of Energy #climate report: "We identify five foundational flaws in the [...] report. Each of these flaws, alone, places the report at odds with scientific principles and practices." www.ametsoc.org/ams/about-am...

ametsoc.org

The Practice and Assessment of Science: Five Foundational Flaws in the Department of Energy's 2025 Climate Report

Adopted by the Executive Committee of the AMS Council on 27 August 2025

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Colette Heald @coletteheald.bsky.social · 25/08/2025

Are you interested in biosphere-atmosphere interactions, global modeling, and living in Zurich? If so, this postdoc position might be for you! Please share with any interested colleagues: jobs.ethz.ch/job/view/JOP...

jobs.ethz.ch

Postdoctoral Researcher in Atmospheric Chemistry

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IPCC @ipcc.bsky.social · 18/08/2025

The #IPCC has announced the authors selected for its Seventh Assessment Report. 664 experts from 111 countries have been invited to participate as Coordinating Lead Authors, Lead Authors, & Review Editors. 🌍 51% from developing countries 🚺 46% women 🔗 bit.ly/AR7AuthorsPR

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Pierre Friedlingstein @pfriedling.bsky.social · 16/08/2025

They should then suggest to remove the first A from NASA …

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Vanessa Warheit @vwarheit.bsky.social · 15/08/2025

That phony EPA 'climate report'? The good folks at @carbonbrief.org fact-checked it. Take a look, and then file a comment with the EPA. interactive.carbonbrief.org/doe-factchec...

interactive.carbonbrief.org

Factcheck: Trump’s climate report includes more than 100 false or misleading claims

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Michael E. Mann @michaelemann.bsky.social · 07/08/2025

"A climate skeptic report commissioned by the Trump administration outrages the American scientific community” by @sfoucart.bsky.social for @lemonde.fr (en francais):

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Pierre Friedlingstein @pfriedling.bsky.social · 01/08/2025

And this now, coming from the DOE 😰 www.energy.gov/sites/defaul...

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Ken Caldeira @kencaldeira.com · 06/07/2025

It is CO2 radiative forcing that poses the largest end-of-century climate threat, because CO2 accumulates in the atmosphere. [C1-C4 are lower, and C5-C8 higher, IPCC temperature scenarios; ERF is effective radiative forcing.] Nice paper. gmd.copernicus.org/articles/15/... @kikstra.bsky.social

Figure 4(a) Effective radiative forcing (ERF) statistics across AR6 scenario database subsets as categorised by AR6WGIII using MAGICC for CO2, CH4, F-gases, and aerosols at different points in time for three climate emulators.

Kikstra, J. S., Nicholls, Z. R. J., Smith, C. J., Lewis, J., Lamboll, R. D., Byers, E., Sandstad, M., Meinshausen, M., Gidden, M. J., Rogelj, J., Kriegler, E., Peters, G. P., Fuglestvedt, J. S., Skeie, R. B., Samset, B. H., Wienpahl, L., van Vuuren, D. P., van der Wijst, K.-I., Al Khourdajie, A., Forster, P. M., Reisinger, A., Schaeffer, R., and Riahi, K.: The IPCC Sixth Assessment Report WGIII climate assessment of mitigation pathways: from emissions to global temperatures, Geosci. Model Dev., 15, 9075–9109, https://doi.org/10.5194/gmd-15-9075-2022, 2022.

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Dan Rutherford @rutherdan.bsky.social · 27/06/2025

Excited to release today with Daniel Sitompul ICCT's first air and GHG inventory for private jets. A lot of eye opening statistics in this report. Let me walk you through a few. (🧵) theicct.org/publication/...

theicct.org

Air and greenhouse gas pollution from private jets, 2023 - International Council on Clean Transportation

The report fills a gap in our understanding of aviation's environmental impact by providing the first detailed global mapping of air and climate pollution from private jets.

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Pierre Friedlingstein @pfriedling.bsky.social · 26/06/2025

“the wedding of the century” 🙄 Definitely in terms of CO₂ emissions ! 😡

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Pierre Friedlingstein @pfriedling.bsky.social · 23/06/2025

In @theguardian.com about geo engineering “If these ideas are otherwise harmless, and work, they might yet save us.”. No they won’t. The only “idea” that can save us is bringing greenhouse gases emissions to zero ! www.theguardian.com/environment/...

theguardian.com

Researchers call for urgent exploration of methods to cool Earth

Ideas include injecting sulphates into the atmosphere to reflect sunlight but this could do more harm than good

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Pierre Friedlingstein @pfriedling.bsky.social · 19/06/2025

Résumé de la publication (aujourd’hui) sur les indicateurs de changement climatique. Pas bcp de bonnes nouvelles. 1.5C se rapproche inexorablement.

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