this post was submitted on 27 Dec 2023
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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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Earth Was Due for Another Year of Record Warmth. But This Warm? Scientists are already busy trying to understand whether 2023’s off-the-charts heat is a sign that global warming is accelerating. (www.nytimes.com)
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[–] Hyperreality@kbin.social 11 points 10 months ago (1 children)

Think this may be relevant to that hypothesis:

And in a much-discussed report last month, the climate researcher James E. Hansen argued that scientists had vastly underestimated how much more the planet would warm in the coming decades if nations cleaned up aerosols without cutting carbon emissions. Not all scientists are persuaded.

[–] maegul@lemmy.ml 7 points 10 months ago

Beyond the accuracy of the Sulfur aerosols theory, the interesting part in the linked video is the stuff about geoengineering.

Which basically said that if aerosol pollution was accidentally keeping the planet relatively cool and so holding off climate change which is actually at a worse level than we thought, then it raises the unavoidable point of whether we’ll be forced to continue to employ geoengineering in our fight against climate change however uncomfortable and dangerous the prospect is.

Green’s opinion on the video is that there’ll be a lot of resistance but that we’ll probably be directed to in the end and so the more we prepare and think about it the better.