this post was submitted on 27 Jul 2024
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Climate - truthful information about climate, related activism and politics.

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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world.  About 1C of total warming.  Second chart:  about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability.  Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases.  About 0.5C of cooling with large error bars from SO2.

Recommended actions to cut greenhouse gas emissions in the near future:

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[–] jordanlund 30 points 1 month ago (2 children)

Man, they buried the answer:

"Across a thousand runs, the model cranked through the temperature data and settled on a year. Sometimes the model spat out later dates. Sometimes earlier. The two scientists made a plot of the numbers and a neat cluster emerged. Yes—2057. But that’s just the middle point: In 95 percent of the model’s simulations, the AMOC tipped sometime between 2025 and 2095."

[–] [email protected] 14 points 1 month ago

It was a good read I thought. It seems like these findings went a little viral, for scientific research that is and the author presumed their readers were already aware of the dates, rightly it wrongly.

I appreciate the insight into the work of scientists and the people involved. There should be more of that IMO.

[–] [email protected] 9 points 1 month ago (2 children)

So as soon as tomorrow as late as the next century? Fuck

[–] [email protected] 9 points 1 month ago* (last edited 1 month ago) (1 children)

No, not every year has equal probability. 2057 and the years around then are the most likely.

[–] [email protected] 8 points 1 month ago

With a 95% certainty that it'll happen before 2095.

[–] jordanlund 6 points 1 month ago

It's possible, but not likely, I'll live to see it happen. 2057 means I'd be 88. Highly unlikely I'll see 88 given my medical and family history.

Say 95% chance I won't live that long. :)

[–] [email protected] 12 points 1 month ago* (last edited 1 month ago)

It was very interesting listening to this article, cause it was like a story built around scientists who study the AMOC.

Just to note that there is a new study from June 2024 that mentions the following:

The collapse time is estimated between 2037-2064 (10-90% CI) with a mean of 2050 and the probability of an AMOC collapse before the year 2050 is estimated to be 59±17%.

(...) the probability of an AMOC collapse before the year 2100 is very likely to be underestimated in the IPCC-AR6 and needs to be reconsidered in the IPCC-AR7.

[–] [email protected] 9 points 1 month ago

So probably not tomorrow.

Definitely the day after tomorrow.