Pierre Friedlingstein

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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Last year record increase in atmospheric CO₂ (3.7ppm), well above the decadal average of about 2.5 ppm, was due to the El Niño conditions.

That statement is misleading:
…” the concentration of carbon in Earth’s atmosphere rose more in 2024 than in any other year ..”
“Climate scientists unanimously agree that last year’s increase was provoked by human activities, especially the burning of fossil fuels like oil, coal and natural gas.”

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.

For once, some good news about the Amazon tropical forest 🌳

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

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

👏

Bill Gates’s climate comments are a dangerous distraction People do not have to dismiss or exaggerate the climate threat to justify concerted action.

👏
“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...

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.

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...

Très bel entretien 👍

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 ...

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...

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.

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

You could also mention that the projected atmospheric CO₂ growth rate will be much lower in 2025 (2.6ppm, red dot on the figure).

bsky.app/profile/pfri...

You are confusing CO₂ emissions and CO₂ concentrations.

And thank you for your contribution 🙏

The world’s carbon emissions continue to rise. But 35 countries show progress in cutting carbon In 2025 the world has fallen short, again, of peaking and reducing its fossil fuel use. But there are many countries on a path to greener energy.

theconversation.com/the-worlds-c...

ourworldindata.org/explorers/co2

www.sustainabilitybynumbers.com/p/global-car...

www.carbonbrief.org/analysis-fos...

@hausfath.bsky.social
bsky.app/profile/haus...

Other posts/additional resources

Additional resources:

@glenpeters
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Home The critical annual update revealing the latest trends in global carbon emissions

More figures, data, etc on the GCB website:
globalcarbonbudget.org

Net zero trajectories

Keeping warming well below 2°C is still within reach, but with massive acceleration of emission mitigation.
It’s time to step up, not to give up.

The remaining carbon budget for 1.7°C or 2°C is 525 GtCO2 and 1055 GtCO2 respectively, equivalent to 12 and 25 years of current CO₂ emissions.

Remaining carbon budget charts

Time is up for 1.5°C. The remaining carbon budget for 1.5°C is virtually exhausted: 170 GtCO2, equivalent to 4 years at the 2025 emissions levels.

Last, we update the remaining carbon budget, that is the amount of CO₂ humanity can still emit in the future while limiting global warming to 1.5°C , 1.7°C or 2°C.

climate impact on the sinks and on atmospheric CO₂

Since 1960, that climate impact leads to a loss of carbon from land and ocean (relative to what they would have been without climate change). We attribute that 8ppm (8%) of the observed atmospheric CO₂ increase of 100 ppm since 1960 is due to this weakening of the sinks.

effect of climate change on teh land and ocean sinks

We also analysed the effect of climate change on the sinks using our models separating the effect of increased atmospheric CO₂, from the effect of climate change.
Result: The land and ocean sinks would have been 25% and 7% larger in the absence of climate change.