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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[–] theonlytruescotsman@sh.itjust.works 1 points 1 week ago (1 children)

That would've been true in the 1970s,but we've hit too many run away effects. We could entirely stop all fossil fuels use tomorrow and we wouldn't see a drop in co2ppm for longer than it would take for all things built by humans to decay.

[–] humanspiral@lemmy.ca 2 points 1 week ago (1 children)

But it wouldn't increase by 3+ppm per year. It wouldn't stop temperatures from rising for another 10-20 years, but at a slower pace that makes sub +2C possible.

[–] theonlytruescotsman@sh.itjust.works 1 points 1 week ago

It would still increase, just not as much... And no, it wouldn't make sub 2c possible. we have a lot of methane currently suspended from the carbon cycle that is releasing more and more each year at current temperatures. On top of this the wildfires frequent at current temps release more carbon than the natural world sequesters each year.

This is without addressing anything with the ocean.