this post was submitted on 24 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.

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A Test of Cloud-Brightening Machines Poses No Health Risk, Officials Say (www.nytimes.com)
submitted 6 months ago by [email protected] to c/[email protected]
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[–] Treczoks 10 points 6 months ago (1 children)

Somehow I am not convinced that spraying salt water into clouds is without risks. Somewhere, all the salt will come down as salty rain after all. I guess farmers will be exited about this when they can harvest pre-salted tomatoes...

[–] kerrigan778 6 points 6 months ago (1 children)

I believe it's mostly being suggested over the ocean. There's a great Hank Green video about this tech.

[–] Treczoks 0 points 6 months ago (1 children)

During the cold war, the Americans (and probably the Russians, too) seeded clouds and checked where the stuff ended up to see how radioactive fallout would work. The result was: basically everywhere.

[–] kerrigan778 1 points 6 months ago* (last edited 6 months ago)

I don't think this is looking at seeding the stratosphere but replacing the sulfur based localized cloud creation that container ships have stopped producing with seawater based local cloud creation. I don't think anyone thinks it will have zero negative effects, but we are at a point where we have unexpectedly good data from the sudden dropoff of sulfur shipping fuels and a very urgent need to address this specific issue.

https://youtu.be/71jlEyIc1Pk Here's a link to the scientific discussion on YT about it. The video linked is actually a bit more anti the whole idea than I am I think but what do I know, he has a climate science PHD. It is a complex issue and a lot of people will die no matter what we do, especially if we do not dramatically reduce our climate impact overall.