this post was submitted on 16 Oct 2023
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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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[–] [email protected] 13 points 11 months ago (2 children)

The history of temperature rise has not been monotonic. So I'd expect a period of a few years where we don't set a new record.

[–] [email protected] 11 points 11 months ago (1 children)

Yes but that doesn't mean we've reached the current peak yet.

[–] [email protected] -5 points 11 months ago (1 children)

Exactly, don't forget that climate change goes extreme in both directions, so we may very well face the coldest year on record too.

[–] [email protected] 15 points 11 months ago* (last edited 11 months ago) (1 children)

Basically no chance of that happening. Temperatures are rising, just with a bit of noise:

Monotonic would mean that each year is strictly warmer than the last one, but the noise is big enough that we sometimes get a few slightly less warm years before the next record.

The bigger picture looks like this: