this post was submitted on 17 Mar 2025
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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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Cold snaps during global warming are not actually a paradox, here's why. (science.feedback.org)
submitted 1 day ago by ice@slrpnk.net to c/climate@slrpnk.net
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Why do cold snaps persist if the Earth is warming? This question has popped up in various forms online, especially on social media. Climate contrarians often use it as a rhetorical question to make the false claim that ‘global warming must not be happening if we still experience cold weather’.

Others may ask this question out of genuine curiosity – after all, it might be confusing to hear that the planet is warming if you are shivering in a cold spell.

But does anything actually prevent global warming and cold snaps from coexisting? Not at all. Cold snaps (short periods of very cold weather) occur when there are large southward dips in the jet stream – strong winds 5 to 7 miles (8 to 11 kilometers) above Earth’s surface that blow west to east

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[–] phasase@slrpnk.net 2 points 18 hours ago

Exactly , also when we look at the probability density curve for observed temperatures and how they are predicted to change in the future, we see a shift towards warmer temperatures in average, which would mean more hot and less cold conditions. But at the same time the variance increases which is flattening the curve. The result is much more (extreme) hot weather and no (or much less) change in cold temperatures.