this post was submitted on 27 Dec 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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Earth Was Due for Another Year of Record Warmth. But This Warm? Scientists are already busy trying to understand whether 2023’s off-the-charts heat is a sign that global warming is accelerating. (www.nytimes.com)
submitted 11 months ago by silence7@slrpnk.net to c/climate@slrpnk.net
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[–] Hyperreality@kbin.social 26 points 11 months ago (1 children)

Relevant bits:

As extreme as this year’s temperatures were, they did not catch researchers off guard. Scientists’ ... 2023’s heat is still broadly within this range, albeit on the high end. ... one exceptional year would not be enough to suggest something was faulty with the computer models ... Global temperatures have long bobbed up and down around a steady warming trend because of cyclical factors like El Niño ... has intensified since, possibly signaling more record heat to come in 2024. ... “I’m not willing to say that we’ve ‘broken the climate’ or there’s anything weird going on until more evidence comes in.” ... Until the current El Niño is over, “it’s unlikely we’ll be able to make definitive claims,” he said.

[–] walter_wiggles@lemmy.nz 27 points 11 months ago (2 children)

Researchers know we're screwed, so saying they weren't caught off guard doesn't make me feel better.

[–] maegul@lemmy.ml 19 points 11 months ago

Yep. Hunting for the drama of a surprise or models being wrong is pretty dumb stuff at this stage.

There’s almost an air of owning the scientists by fucking the climate even harder than they understood.

[–] magikmw@lemm.ee 1 points 11 months ago

Apocalyptic climate changes on schedule.