Pierre Friedlingstein
@pfriedling.bsky.social
Born at 321 ppm. Climate & Carbon Cycle Scientist. Prof @UniofExeter Directeur de Recherche @CNRS @GlobalCarbonProject
Pinned
Really sorry for the poor quality of the figures below. They looked OK on my laptop
All figures are available here:
globalcarbonbudget.org/gcb-2024/
GCB Presentation in PDF and PPT format
plus country level emission figures
Also available here :
robbieandrew.github.io/GCB2024/
All figures are available here:
globalcarbonbudget.org/gcb-2024/
GCB Presentation in PDF and PPT format
plus country level emission figures
Also available here :
robbieandrew.github.io/GCB2024/
Reposted by Pierre Friedlingstein
🤝 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 👇
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
November 10, 2025 at 2:59 PM
🤝 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 👇
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 👇
Reposted by Pierre Friedlingstein
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/...
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
November 4, 2025 at 10:22 PM
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/...
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Reposted by Pierre Friedlingstein
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...
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.
www.nature.com
November 4, 2025 at 10:54 PM
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...
www.nature.com/articles/d41...
Reposted by Pierre Friedlingstein
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 🌳
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...
www.radiofrance.fr
October 22, 2025 at 5:36 AM
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 🌳
Explications en GIF 🌳
👏
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.
🧵
But Roger is of course lying. And we know this for 2 reasons.
🧵
October 10, 2025 at 11:14 AM
👏
Definitely worth a read.
October 5, 2025 at 10:50 PM
Definitely worth a read.
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...
(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.
www.reuters.com
September 23, 2025 at 6:05 PM
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...
(Upton Sinclair)
www.reuters.com/sustainabili...
Reposted by Pierre Friedlingstein
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
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
www.cnrs.fr
September 9, 2025 at 3:39 PM
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
Reposted by Pierre Friedlingstein
🌍 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...
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...
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 […]
www.hautconseilclimat.fr
September 5, 2025 at 11:30 AM
🌍 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...
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...
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 ? 🤓
So could 2.2°C be seen as the maximum allowed overshoot temperature ? 🤓
NEW STUDY: How much CO2 can we safely store in geological formations?
In a new @nature.com study, we cross-check established academic and industry estimates with various risk factors.
We find a prudent geological CO2 storage limit that is about 10x smaller. /1
In a new @nature.com study, we cross-check established academic and industry estimates with various risk factors.
We find a prudent geological CO2 storage limit that is about 10x smaller. /1
September 3, 2025 at 6:12 PM
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 ? 🤓
So could 2.2°C be seen as the maximum allowed overshoot temperature ? 🤓
Great news study of the global ocean carbon sink response to the 2023 warming conditions
🌊 In 2023, the ocean carbon sink weakened for the first time in a record-hot year 🌡️🌎
Our new study in Nature Climate Change quantifies this unexpected decline and explains how it came about. 👇
doi.org/10.1038/s415...
Our new study in Nature Climate Change quantifies this unexpected decline and explains how it came about. 👇
doi.org/10.1038/s415...
Unexpected decline in the ocean carbon sink under record-high sea surface temperatures in 2023 - Nature Climate Change
The ocean carbon sink strengthened in previous warm El Niño years due to reduced CO2 outgassing in the tropics. Here the authors show that the ocean carbon sink declined in 2023 despite record-high se...
doi.org
September 2, 2025 at 6:45 PM
Great news study of the global ocean carbon sink response to the 2023 warming conditions
Reposted by Pierre Friedlingstein
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...
"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...
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
www.ametsoc.org
August 28, 2025 at 5:18 PM
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...
"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...
Reposted by Pierre Friedlingstein
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...
Postdoctoral Researcher in Atmospheric Chemistry
jobs.ethz.ch
August 25, 2025 at 1:57 PM
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...
Reposted by Pierre Friedlingstein
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
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
August 18, 2025 at 1:09 PM
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
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
They should then suggest to remove the first A from NASA …
NASA’s acting chief calls for the end of Earth science at the space agency arstechnica.com/space/2025/0...
NASA’s acting chief calls for the end of Earth science at the space agency
NASA’s charter clearly states the agency should study planet Earth, however.
arstechnica.com
August 16, 2025 at 12:49 AM
They should then suggest to remove the first A from NASA …
Reposted by Pierre Friedlingstein
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...
Factcheck: Trump’s climate report includes more than 100 false or misleading claims
interactive.carbonbrief.org
August 15, 2025 at 12:28 AM
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...
Reposted by Pierre Friedlingstein
"A climate skeptic report commissioned by the Trump administration outrages the American scientific community” by @sfoucart.bsky.social for @lemonde.fr (en francais):
August 6, 2025 at 11:22 PM
"A climate skeptic report commissioned by the Trump administration outrages the American scientific community” by @sfoucart.bsky.social for @lemonde.fr (en francais):
July 31, 2025 at 11:12 PM
Reposted by Pierre Friedlingstein
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
[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
July 5, 2025 at 11:03 PM
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
[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
Reposted by Pierre Friedlingstein
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/publication/...
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.
theicct.org
June 27, 2025 at 4:52 PM
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/publication/...
“the wedding of the century”
🙄
Definitely in terms of CO₂ emissions ! 😡
🙄
Definitely in terms of CO₂ emissions ! 😡
Celebrities make a splash in Venice amid protests over €40m Bezos wedding bash
Celebrities make a splash in Venice amid protests over €40m Bezos wedding bash
Private jets and super-yachts deliver guests to three-day event critics say will turn city into playground for rich
The world’s rich and famous have arrived in Venice as the three-day wedding bash hosted by the Amazon billionaire, Jeff Bezos, and his wife-to-be, Lauren Sánchez, gets under way amid protests in the lagoon city.
The US reality TV personalities Kim and Khloé Kardashian were spotted clambering into water taxis in stilettos, while Kris Jenner, Oprah Winfrey, Orlando Bloom and Jordan’s Queen Rania have also been seen. Continue reading...
www.theguardian.com
June 26, 2025 at 5:21 PM
“the wedding of the century”
🙄
Definitely in terms of CO₂ emissions ! 😡
🙄
Definitely in terms of CO₂ emissions ! 😡
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/...
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/...
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
www.theguardian.com
June 23, 2025 at 7:24 PM
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/...
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/...
Résumé de la publication (aujourd’hui) sur les indicateurs de changement climatique.
Pas bcp de bonnes nouvelles. 1.5C se rapproche inexorablement.
Pas bcp de bonnes nouvelles. 1.5C se rapproche inexorablement.
C'est un rappel à la réalité des faits : les efforts engagés depuis l'Accord de Paris (il y a 10 ans) n'ont pas été suffisants pour limiter le réchauffement à 1,5°C.
11/...
11/...
June 19, 2025 at 1:53 PM
Résumé de la publication (aujourd’hui) sur les indicateurs de changement climatique.
Pas bcp de bonnes nouvelles. 1.5C se rapproche inexorablement.
Pas bcp de bonnes nouvelles. 1.5C se rapproche inexorablement.
Reposted by Pierre Friedlingstein
« La suite dépend des choix qui vont être faits, insiste la paléoclimatologue Valérie Masson Delmotte. Nous pouvons limiter l’ampleur du réchauffement à venir, et protéger les jeunes générations de l’intensification des événements extrêmes. » @valmasdel.bsky.social
June 19, 2025 at 4:45 AM
« La suite dépend des choix qui vont être faits, insiste la paléoclimatologue Valérie Masson Delmotte. Nous pouvons limiter l’ampleur du réchauffement à venir, et protéger les jeunes générations de l’intensification des événements extrêmes. » @valmasdel.bsky.social
Reposted by Pierre Friedlingstein
🌊
Out today in Nature, our paper on the drivers of the record 2023 summer heating of the North Atlantic. Temperatures warmed to record levels in just a few months. The impacts on climate & ecosystems were severe. A thread on how this work came about and what we found.👇👇🧵 www.nature.com/articles/s41...
June 4, 2025 at 5:07 PM
🌊