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Glen Peters

Glen Peters

@glenpeters.bsky.social

25K followers 290 following 2K posts

Energy, emissions, & climate
CICERO Center for International Climate Research, Oslo, Norway
https://cicero.oslo.no/en/employees/glen-peters

Glen Vecchione is an American composer, lyricist, poet, and writer. With David Dusing he co-authored the music and lyrics to the musical The Legend of Frankie and Johnny. He is the author and illustrator of several non-fiction books for children and young adults; many of them written on science related topics or on children's games. He has also published poetry for adults in several literary journals. Under the pseudonym Glen Peters he wrote the novel Where the Nights Smell Like Bread. .. more

Environmental science 41%

Economics 22%

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Glen Peters @glenpeters.bsky.social · 3d

📢Global Carbon Budget 2025📢

Fossil CO2 emissions continue to rise in 2025 while the terrestrial carbon sink recovers to pre-El Niño strength.

The key findings are covered in two reports this year:
* ESSDD (preprint): essd.copernicus.org/preprints/es...
* Nature: www.nature.com/articles/s41...

1/

Glen Peters @glenpeters.bsky.social · 1d

Yes, china is about 50% of the global total.

Glen Peters @glenpeters.bsky.social · 1d

The drop in CO2 is mainly due to less coal in electricity generation. Total GHG, then land use saves the day...

Glen Peters @glenpeters.bsky.social · 1d

5% is not enough, no. 1.5C now would require 25% per year or similar.

Glen Peters @glenpeters.bsky.social · 1d

Yes, but most uptake is at the start. I thought the same as you.

Glen Peters @glenpeters.bsky.social · 1d

Yes, land is much more exciting...

Glen Peters @glenpeters.bsky.social · 1d

It turns out this is about 0.2% of the 1.1% increase in fossil CO2 emissions in 2025!

Glen Peters @glenpeters.bsky.social · 1d

The most common question I was asked by journalists: "was there anything that surprised you"?

"Well, no, because I work on this everyday".

Now I have found the surprise... Carbonation, the uptake of CO2 in cement, has turned a corner because cement production is dropping!

Glen Peters @glenpeters.bsky.social · 1d

The same for journalists. If a politician or business leader spits out 1.5C or net zero, ask them how fast emissions need to drop to reach net zero in 2050, and how fast they are dropping today. Point out the contradiction. Make them explain it.

Reposted by Simon L. Lewis, Peter Thorne, Dominik Wiedenhofer , and 1 more Simon L. Lewis, Peter Thorne, Dominik Wiedenhofer, Stacy D. VanDeveer

Glen Peters @glenpeters.bsky.social · 1d

My fear is scientists will just sit by & be complicit. Saying you are for 1.5C or net zero is not ambition.

If rich country GHG or CO2 emissions are not dropping at >5% per year, they are not remotely consistent with 1.5C, nor net zero in a reasonable time frame.

Scientists need to point this out.

Rishika Pardikar @rishpardikar.bsky.social · 1d

Rich, historical polluter countries that had the highest legal responsibility to take climate action failed. And now some of these same countries are speaking about '1.5C ambition'. What a charade

Reposted by Glen P. Peters

Rishika Pardikar @rishpardikar.bsky.social · 1d

Rich, historical polluter countries that had the highest legal responsibility to take climate action failed. And now some of these same countries are speaking about '1.5C ambition'. What a charade

Reposted by Glen P. Peters

Robbie Andrew @robbieandrew.bsky.social · 2d

For the fossil CO₂ component, we also have revisions, which are documented in the standalone report here: zenodo.org/records/1741...

Graph showing: Global fossil CO2 emissions across versions of GCP's dataset

Glen Peters @glenpeters.bsky.social · 2d

It is worth a reminder that each year we revised the carbon budget in all years, not just the last year
www.carbonbrief.org/analysis-fos...

This year we had a rather big adjustment in land-use change emissions, including the change in carbon density due to CO2 fertilisation, etc.
rdcu.be/ePDDS

Glen Peters @glenpeters.bsky.social · 2d

Wise woman...

Reposted by Jussi T. Eronen

Glen Peters @glenpeters.bsky.social · 2d

"I would want to see emissions going down for several years before I would stand up on a building top and shout that emissions have peaked"

Please take note of my wise words...

www.nature.com/articles/d41...

Reposted by Glen P. Peters, Scott C. Doney, Robbie M. Andrew , and 1 more Glen P. Peters, Scott C. Doney, Robbie M. Andrew, Stacy D. VanDeveer

Corinne Le Quéré @clequere.bsky.social · 2d

The 2025 update of the Global Carbon Budget is out.
While fossil CO2 emissions rise again and carbon sinks are weakened by climate change, deforestation emissions are down and many countries decarbonise their energy.
No global emissions peak yet though.
theconversation.com/the-worlds-c...

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

Reposted by Glen P. Peters

Overshoot Podcast @overshootpod.bsky.social · 2d

"...it's virtually impossible not to cross 1.5 degrees now. It's just not possible to turn the ship around so fast"

@glenpeters.bsky.social

Listen now: overshootpod.com

Glen Peters @glenpeters.bsky.social · 2d

Fossil CO2 emissions are still growing, in case you missed it...
bsky.app/profile/glen...

Glen Peters @glenpeters.bsky.social · 2d

The thing that amazes me most about this figure is not the progress that we made from the blue line "where we were going", but that everyone seems to be having heart failure that the IEA made a scenario where emissions are flat, instead of falling 20% in 25 years...

www.axios.com/2025/11/13/c...

Glen Peters @glenpeters.bsky.social · 2d

All pathways assume todays non-CO2 forcing remains constant, in case you were wondering...

Reposted by Johan P. Olsen

Glen Peters @glenpeters.bsky.social · 2d

If CO2 emissions go to zero in 2050 (top), the sinks (green) will bring atmospheric CO2 back down (middle), & temperature will stabalise at ~1.7°C (bottom).

Going to zero today will keep us <1.5°C

Constant emissions leads to 2.6°C, rising rapidly thereafter.

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

Glen Peters @glenpeters.bsky.social · 2d

Kina er verdens største utslippsnasjon, verdens største forbruker av kull og verdens største utbygger av fornybar energi. Kina er både verst og best. Så hva er status for Kinas klimaomstilling?

Hør og lær:
www.energiogklima.no/podkast/stat...

Glen Peters @glenpeters.bsky.social · 2d

I think this must be a browser issue. I did not have the problem (Chrome). You would have to ask Nature.

Otherwise: bsky.app/profile/open...

Robert Gieseke (Openclimatedata) @openclimatedata.net · 3d

To quote from the paper: "For the purpose of open access, the author has applied a Creative Commons Attribution (CC BY) licence to any Author Accepted Manuscript version arising from
this submission."

You might find it here:

drive.google.com/drive/folder...

Reposted by Glen P. Peters

Robert Gieseke (Openclimatedata) @openclimatedata.net · 3d

To quote from the paper: "For the purpose of open access, the author has applied a Creative Commons Attribution (CC BY) licence to any Author Accepted Manuscript version arising from
this submission."

You might find it here:

drive.google.com/drive/folder...

Reposted by Glen P. Peters, Scott C. Doney, Olivier Honnay , and 3 more Glen P. Peters, Scott C. Doney, Olivier Honnay, Wim Thiery, Richard Waite, Hisham Zerriffi

Pierre Friedlingstein @pfriedling.bsky.social · 3d

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

Glen Peters @glenpeters.bsky.social · 3d

(I do have the slides, send me an email and I can send them)

Glen Peters @glenpeters.bsky.social · 3d

I think it is on demand afterwards. But have not tested. Unfortunately, you could not see the slides!

Glen Peters @glenpeters.bsky.social · 3d

And here is perhaps a better version, looking at the top 10 countries causing the changes in emissions from 2015 and from 2023.

Glen Peters @glenpeters.bsky.social · 3d

International aviation (and shipping) are not allocated to countries.

Glen Peters @glenpeters.bsky.social · 3d

You should be able to see here, also on demand later, unfccc-events.azureedge.net/COP30_108258....

unfccc-events.azureedge.net

Glen Peters @glenpeters.bsky.social · 3d

unfccc-events.azureedge.net/COP30_108258....

unfccc-events.azureedge.net