this post was submitted on 08 Jan 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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Global heating will pass 1.5C threshold this year, top ex-Nasa scientist says (www.theguardian.com)
submitted 10 months ago by silence7@slrpnk.net to c/climate@slrpnk.net
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What this means in practice is that we enter a minefield where we start to lose major ecosystems as temperatures continue to rise.

This makes it incredibly important to do everything we can to limit the amount of additional warming we see; each 1/10 of a degree adds to the risk.

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[–] Dmian@lemmy.world 20 points 10 months ago (2 children)

It’s really, truly difficult to keep a positive mindset with these kind of news, but sadly avoiding them doesn't make things better. I can’t help thinking that we’re starting to get a peek at the abyss of human extinction. I’m sorry.

[–] Cethin@lemmy.zip 5 points 10 months ago (1 children)

Sadly, this will probably not make humans extinct. It'll kill a lot of people and make life worse for even more, but some humans will survive. It's a question of how much damage it does to the planet. I guess we could end up in a venus situation, but that's probably unlikely. I'm not sure what'd have to happen to get to that point.

[–] maegul@lemmy.ml 3 points 10 months ago

It would be interesting to see any detailed analyses on what is likely to persist in terms of human civilisation.

I’ve just consigned the whole idea to something more or less like the world wars where everyone afterward will wonder “what the fuck happened” but eventually accept their fate (humans are good at being slowly boiled unfortunately). To some extent there will be some memory of what was and why it was lost, but I suspect it’s unpredictable how that gets culturally encoded.

[–] Shelbyeileen@lemmy.world 5 points 10 months ago

Many scientists believe we're already well into a man-made extinction event. Species are going extinct 35x faster than they have in the last million years. And the mass extinction before the Triassic Period killed 90% of all life and took a mere 10 degree rise