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
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...
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Reposted by Glen P. Peters, John Hogan, Stefan C. Aykut , and 1 more Glen P. Peters, John Hogan, Stefan C. Aykut, Béatrice Cointe
Peak growth is around 40 years, but after 80 years the annual increment stays constant (meaning the volume grows).
landsskog.nibio.no
(If you turn you head to the side, and use a mirror, you can think of atmospheric CO2 as a proxy for time, then the emissions looks like emissions as a function of time)
The relationship is different for CO2 concentration, but approximately linear:
* CO2 concentration grows faster than cumulative emissions
* Declining CO2 emissions leads to declining concentration
rdcu.be/d9Rnm
Reposted by Richard Betts
It is not easy getting El Nino right either: 2023 is either La Nina or El Nino depending on lags and annualisation.
"More hydrogen means fewer detergents [OH] in the atmosphere, causing methane to persist longer &, therefore, warm the climate longer"
phys.org/news/2025-12...
Article: www.nature.com/articles/s41...
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...
Or get the more digestible version from @ayeshatandon.carbonbrief.org @carbonbrief.org
www.carbonbrief.org/hydrogen-emi...
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We did not look at H2 substitution in the energy system, that would require different modelling tools.
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While it is obviously important to reduce hydrogen leaks, reducing CH4 reduces the production of H2 by oxidation.
We should reduce CH4 emissions anyway, but the H2 effect is yet another reason.
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H2 from production leaks is quite small, but growing. H2 from fossil fuel use is small and declining.
But, H2 from CH4 oxidation is increasing, as CH4 is increasing.
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Reposted by Steven J. Davis, Peter Thorne
The biggest source of H2 into the atmosphere is oxidation of CH4 and NMVOCs. So if you care about the climate effects of H2, reduce your CH4 emissions...
www.nature.com/articles/s41...
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Reposted by Glen P. Peters, Fabián Muniesa
One questions futures, the other is history-oriented, take your pick!
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The problem is these forests don't really exist, as they were hacked down years ago. The old growth forests that exist are often of low quality (ie, not valuable for harvest).
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Well, no, forests take up carbon long after harvest "maturity".
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Obviously...
But, I find this discussion on old growth harvests a little weird.
"Maturity" is defined as the point of maximum growth, when harvesters want to harvest.
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This will be unrelated to the biofuels, as I would assume most of those are sourced outside of Sweden?
It seems there has been a substantial revision in the Swedish LULUCF (right is from last years emission reporting).
Reposted by Valerie M. Delmotte
How do we know? Because emissions go up when the policy is removed (transport in this case).
[Noting, biofuels are allocated zero emissions in GHG emission reporting, on the assumption emissions are captured in LULUCF]
Reposted by Glen P. Peters
"Policy-driven acceleration of climate action"
🔗 journals.plos.org/climate/arti...