this post was submitted on 15 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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Archived copies of the article: archive.today ghostarchive.org web.archive.org

The paper is here

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[–] paddirn@lemmy.world 11 points 6 months ago (2 children)

Oh boy, so we get to live how Jesus would’ve lived.

[–] silence7@slrpnk.net 20 points 6 months ago (1 children)

Sadly, it's a lot hotter than that

[–] Rhaedas@fedia.io 7 points 6 months ago

Hockey sticks everywhere! I'm beginning to think there may be a problem.

[–] Ephera@lemmy.ml 9 points 6 months ago (1 children)

That was my initial interpretation, too, but no, they simply only reconstructed temperatures for the past 2000 years. It's likely that it was the hottest summer for much longer than that.

For example, here's a xkcd (which was certainly created with much less accurate data, but I would assume isn't completely off the mark), which shows our time as the hottest since the last ice age: https://xkcd.com/1732/

And that ice age started 115,000 years ago, so I guess, that's why the article also mentions experts saying that certain days and weeks were likely the hottest for 120,000 years.

[–] silence7@slrpnk.net 3 points 6 months ago

Yeah, we know things with lower certainty as you go back further. 2000 years is about the limit of dendrochronology, but other techniques give us much longer time periods but without the same on-land spatial or temporal resolution.

[–] Doxatek@mander.xyz 5 points 6 months ago

2024: "hold my beer"

[–] Coreidan@lemmy.world 2 points 6 months ago (1 children)