this post was submitted on 04 Dec 2024
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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.

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The Arctic Could Be Functionally Ice-Free in Just a Few Years (www.scientificamerican.com)
submitted 21 hours ago by ButtKiss@lemmy.dbzer0.com to c/climate@slrpnk.net
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The Arctic is likely to become “ice-free” by midcentury—and could pass that grim milestone much sooner unless much more is done to combat climate change

Well, good luck with that.

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[–] floofloof@lemmy.ca 31 points 18 hours ago* (last edited 18 hours ago) (1 children)

I guess the models and estimates changed. Science is like that: it responds to new discoveries. It's only a minor difference in the time scale though: whether it's 2013 or 2030, we're in serious trouble now.

[–] troed@fedia.io -4 points 11 hours ago

It's the difference between scientific consensus and doomists.

Scientific consensus isn't that the north pole sea will be ice free in the summer in the next few years.