this post was submitted on 15 May 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.

Recommended actions to cut greenhouse gas emissions in the near future:

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The Summer of 2023 Was the Hottest in 2,000 Years (www.scientificamerican.com)
submitted 6 months ago by silence7@slrpnk.net to c/climate@slrpnk.net
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Archived copies of the article: archive.today ghostarchive.org web.archive.org

The paper is here

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[–] silence7@slrpnk.net 3 points 6 months ago

Yeah, we know things with lower certainty as you go back further. 2000 years is about the limit of dendrochronology, but other techniques give us much longer time periods but without the same on-land spatial or temporal resolution.