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So remember that tipping point we were warned about? Yeah, its happening. The deep ocean currents in the southern ocean have reversed.. TLDR: warmer saltier carbon dioxide rich water is now coming up from the deep ocean instead of being trapped there. It is melting sea-ice from below and could eventually lead to the reversal or stagnation of other ocean currents.
Even better, this occurred about a decade ago, and we didn't even realize it untill now.... meaning the global thermohaline circulation cycle has been collapsing for a decade.
Oops.
Irreversible. Can't fix.
No going back.
In all likelihood, we have Great Filtered ourselves.
Best case scenario, we get a century or so, starting basically now, of civilization collapse, mass famine and death, attempts at mass migrations that mostly get Holocausted, and of course wars, potentially nuclear wars...
...and then maybe in 100 years the remaining human population of roughly 1-2 billion can maybe figure out a new paradigm... if we have not just permanently broken the biosphere, and already extracted all the easily extractable natural resources.
My money is on nuclear self-destruction. We have way too many of these things in the hands of extremely poor leadership. It really feels like it's just a matter of time.
... I have a graphic for that, if you're in the US.
"I don't want to set the world... on... fire..."
we probably die from drought long before that happens, or if one of the supervolcanoe erupts
Cascadia Subduction Zone super-earthquake.
Imagine an 8.5 to 10 mag earthquake, but instead of at one localized point, its basically continuous along about 500 to 1000 miles of a line about 250 miles out in in the Pacific, where one tectonic plate is diving under others, but has been building up friction tension for ~300 years.
And it normally snaps roughly every 250 years, the last time it happened it caused a tsunami that hit Japan, and is the origin of many PNW Native People's flood stories.
So we're ~50 years overdue for that happening again.
When I was a kid, they said it was a 1 in 20 chance happening in this century. Now they say its a 1 in 3 chance.
After this process is over, after everything gets shaken to all hell, and tsunami'd... well, in many areas, the coastal plates actually end up something like 10 to 15 feet lower than it was previously...
So those areas are now just permanently flooded, now under the new default water line.
And if we are all super duper unlucky, this massive of an event could trigger other fault lines along the NA West Coast, in say, California...
... and the Cascade mountain range...
... yeah a lot of them are actually volcanoes, which were formed by this very same plate dynamic that would be snapping in a CSZ rupture... they have just been dormant for a long time... they could potentially become more active or even erupt.
So yeah, that would/could basically destroy most of civilization roughly west of I5, on the West Coast.
yellowstone supervolcanoe, the cascadia landslides might cause a mega tsunami though.
Yep. SMOC reversed.
We. Are. Fucked.
Sooner or later the AMOC will start to be affected as well