this post was submitted on 02 Mar 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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[โ€“] NocturnalEngineer@lemmy.world 1 points 8 months ago (1 children)

What happened in 1980s to start this trend?

[โ€“] Ranvier@sopuli.xyz 18 points 8 months ago* (last edited 8 months ago)

Sorry if this is just a facetious comment I'm replying to suggesting global warming didn't start until the 1980s. Anthropogenic global warming had been happening ever since fossil fuel emissions became widespread, but it is true that warming probably accelerated around then. One of the contributors, besides more co2 and other greenhouse gases, was a lot of action to reduce sulfate pollution in the 1970s. While sulfates are very harmful to human health and cause acid rain and all sorts of other badness, they were having a slight cooling effect. Also worrying is there are still large countries where sulfate emissions are less controlled, much to the detriment of the people that live there. However those sulfates may still be having a cooling effect, meaning our situation right now may be even worse than it seems with the sulfates still masking some portion of the warming.

https://www.sciencenews.org/article/50-years-ago-scientists-puzzled-over-slight-global-cooling