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[-] LillyPip@lemmy.ca 32 points 10 months ago* (last edited 10 months ago)

I just hope we’re not seeing the start of a shutdown of the North Atlantic current, which is likely what led to the Younger Dryas ice age, which marked a dramatic climate shift and widespread extinction event over just a couple of decades:

The change was relatively sudden, took place over decades, and resulted in a decline of temperatures in Greenland by 4–10 °C (7.2–18 °F), and advances of glaciers and drier conditions over much of the temperate Northern Hemisphere. A number of theories have been put forward about the cause, and the hypothesis historically most supported by scientists is that the Atlantic meridional overturning circulation, which transports warm water from the Equator towards the North Pole, was interrupted by an influx of fresh, cold water from North America into the Atlantic.

Right now, it’s looking like that may have already started: Study: Warning of a forthcoming collapse of the Atlantic meridional overturning circulation. If that’s the case, things will become very hot and then abruptly freeze, not over the course of a century, but virtually overnight.

e: better link

[-] Obi@sopuli.xyz 15 points 10 months ago

When you stop and actually think about our situation you realise how thin our operating margins are, we are at the mercy of whatever the planet does and our safety is subject to immediate dismissal should the conditions change. Worse of course are the random cosmic whims which could wipe us out instantly at any time e.g. comets, the sun going weird, etc.

[-] PotjiePig@lemmynsfw.com 2 points 9 months ago

It's a thought that gives me comfort that we, as a species, will be evicted before we can do irreparable damage so that life can continue to evolve without us.

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this post was submitted on 18 Jan 2024
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