this post was submitted on 18 Jun 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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[–] ValenThyme@reddthat.com 22 points 4 months ago* (last edited 4 months ago) (1 children)

NOAA is doing this science and is alarmed, this isn't just some shower thought

Using an extraordinarily sensitive instrument custom-built at NOAA in Boulder, Colorado, and mounted in the nose of a NASA WB-57 research aircraft**, scientists found aluminum and exotic metals embedded in about 10 percent of sulfuric acid particles, which comprise the large majority of particles in the stratosphere. They were also able to match the ratio of rare elements they measured to special alloys used in rockets and satellites, confirming their source as metal vaporized from spacecraft reentering Earth’s atmosphere.

source

[–] CameronDev@programming.dev 7 points 4 months ago (1 children)

There will be a lot of work to understand the implications of these novel metals in the stratosphere,” Murphy said

I don't see anything in that article about them being "alarmed".

So far all the scientists appear to be saying "heads up, we need to investigate this further", not "stop launching, this is bad". We should listen to the scientists.

[–] ValenThyme@reddthat.com 10 points 4 months ago

if you read the linked pnas article at https://www.pnas.org/doi/10.1073/pnas.2313374120 while remaining scientifically dispassionate I very much get the impression they are trying to warn us about the trajectory we are currently on.

You are correct though, the article doesn't say that they are alarmed I have inferred that from following the subject in general.