Remaining CO2 budget for 1.5 and well below 2C updated by Kevin Anderson for January 2025 , after Lamboll et al 2023.
https://www.nature.com/articles/s41558-023-01848-5
The team of The God Of Budgets😁 , Joeri Rogelj, of which Robin Lamboll is a member, has a new paper out on budgets that includes the various uncertainties by aerosol masking – and which describe the 196 national budgets according to 5 or 6 different equity considerations, for 1.5, 1.7 and 2C warming.
https://www.nature.com/articles/s41467-025-56397-6 , Li et al 2025
Quite complex. Have been playing with the supplementary data for national budgets for a week or so now, and still can't make much sense of the values 😁
One equity consideration is left out which I very much liked in Romanovskaya 2019 https://www.tandfonline.com/doi/full/10.1080/17583004.2019.1620037
She considered nations according to their heating and cooling requirements and also regarding their population density. So a densely populated Germany for example gets a lower mobility budget for personal and goods transport than Tanzania, but a far higher heating budget.
I'm trying to apply her logic to the new godly message by Li, Rogelj et al – just to see how this changes things.
Needless to say: Germany is far outside her budget already in either case. There might be some left for 2C, but I doubt it.
Another thing around budgets that always ails me:
nowadays, we count land use change and forestry LUCF emissions. And since mostly nations from the Global South are still felling forests, this gets deducted from their fair budget.
So far so good. But.
Spain for example built its wealth by felling all the oak forest by 1600 AD. For ship building and metallurgy.
The whole land was covered by oak trees from the Pyrenees down to Gibraltar in 100 AD or something, a roman explorer and philosopher wrote back then, forgot his name now.
So why should these emissions not count against Spain's remaining budget? South America is speaking Spanish for a reason. Without those oak trees, they'd speak, dunno, maybe English? Or Portuguese or Italian?
Anyway, the point is that they felled them, did not plant new ones, and took the riches from South America to build their nation's wealth that still today is the foundation of their well-being.
What do you think? Is it fair to deduct emissions from felling forests from national budgets – while omitting nations like Spain and Great Britain?
#equity #ParisAgreement #CO2budget