RadReduction (Larry Edwards)
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radreduction.bsky.social
RadReduction (Larry Edwards)
@radreduction.bsky.social
320 followers 540 following 660 posts
Follow me about radical reductions of climate harming emissions (especially from flying, cruise). Interests: climate, policy, overtourism.

My location: Under the global cloud of GHGs.

ResearchGate: https://www.researchgate.net/profile/Larry-Edwar
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radreduction.bsky.social
And that travel is entirely discretionary.
November 25, 2025 at 11:39 PM
radreduction.bsky.social
I think it's worth considering that partly what led to the mess we're in was calling what needed to be a ceiling, instead a threshold or target.

And it could be said that we have been in overshoot since 1C (or perhaps 350 ppm).

This from Hare (1997, www.researchgate.net/publication/...):
"Taking the climate sensitivity to be 3.5 oC, with a limit of a 1 oC increase in global mean surface temperature above pre-industrial levels and assuming that other greenhouse gases contribute about one quarter of the effect of CO2 alone in the long term, the ‘carbon budget’ over the next century can be estimated in terms of billions of tonnes of carbon (GtC). With these assumptions, the ‘carbon budget’ is: - 145 GtC - With no action to stop current trends of deforestation (as forests release carbon when destroyed), with 80 GtC emitted from this source over the next century. - 225 GtC - With major action to halt deforestation, stabilising the role of forests at current levels, which would involve a significant global reafforestation programme next century. - 265 GtC - With major action to halt deforestation and a major global afforestation programme to sequester (take up) an extra 40 GtC. There is an uncertainty of around 50% associated with these budgets deriving from uncertainties in the climate sensitivity, the role of other greenhouse gases, in the carbon cycle models and other factors. It should be noted that limiting the long term temperature rise may mean getting back below a 1.0 oC increase above pre-industrial levels as it may not be possible to avoid a rise of 1.0 oC. Because of the lag between temperature rise in the air and the thermal ...
November 25, 2025 at 8:09 AM