BREAKING: catastrophically rapid global warming via an 'aerosol termination shock' in the 2020s and 2030s cannot be ruled out say scientists as they urge immediate media coverage 🧵
1. A recent albedo decrease and increase in planetary heat uptake coincided with a decrease in anthropogenic sulfur emissions.
This trend could accelerate further with more sulfur emission reductions.
3. There’s a fix for at least some of this short-term increase in the rate of warming:
"The only measures that can counteract this increased rate of warming over the next decades are methane reductions"insideclimatenews.org/news/15092021/…
4. Methane is rising sharply
5. The thread is being updated with further details:
6. global warming acceleration is due to the one huge climate forcing that we have chosen not to measure: forcing caused by imposed changes of atmospheric aerosols
expect warming rate for 2015-2040 to double 'unless appropriate countermeasures are taken' mailchi.mp/caa/july-tempe…
7. Scroll up to read this helpful conversation.
Dire 1.5°C can be expected by the 2020s, or if not, by the 2030s.
2°C hell looks hard/impossible to avoid by the 2030s-2060s to my mind, though theoretically it could be delayed for many decades/centuries.
2. 'Planetary boundaries represent thresholds in major Earth system processes that are sensitive to human activity and control global-scale habitability and stability
critical oxygen thresholds are being approached at rates comparable to other.. processes'
An amazing news story totally ignored by state-corporate media: according to even the most conservative and optimistic consensus assumptions there had to be 'immediate action' years ago at the very latest with emissions peaking and falling by now to avoid utterly catastrophic 2C.
BREAKING: scientists warn we're beginning to feel the effects of a geologically instantaneous 21st century shift into extreme and unsurvivable conditions 🧵
1. 'We are starting to feel the effects of transitioning to a hothouse climate (ΔT +4-5 °C) in a geological instant'
The global change happening now is potentially like the Permian extinction which occurred in just a few centuries.
2. "In my view it is impossible to survive that sort of change (4°C by 2100). That is beyond human physiology. But that is the trajectory we are on now.. No matter what we do with all the whiz-bang technology.. physiologically we cant survive that."
Even establishment climate scientists who organise consensus views (and often downplay catastrophe) show we can anticipate 2.1°C by (2035- ) 2050 at which point impacts become too severe to manage.
Scientists now know today's capitalist economic system can't limit global warming to well below 2°C meaning human adaptation will not be feasible as the conditions for modern agriculture disappear forever in the coming years. Most scientists accept this. Some aren't ready yet. 🧵
Officially, CO2 emissions would have needed to be reduced by a staggering 70% in the 2020s to limit global warming to well below 2°C (when CDR fails). This is obviously not feasible: economic growth has left us with record high emissions approaching 2025.