this post was submitted on 29 Dec 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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We've barely managed to make a tiny dent (lemmy.blahaj.zone)
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[–] Rhaedas@fedia.io 8 points 1 week ago

Lots of different independent methods and sources that correlate, along with some approximations. Actual measured readings aren't as accurate or match up in the early periods, which is why the IPCC decided to use 1980 as a baseline to start from for consistent and abundant data to compare with. This continues to be a side argument about if we're really past 1.5C or not, since the graphs start differently. The "good" news is that as time goes on, that argument becomes less relevant because the differences shrink and catastrophic converges.