this post was submitted on 21 Aug 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] 8 points 1 year ago (2 children)

1.7 million Hiroshima bombs of heat

These imperial units are just getting ridiculous. Can someone express that in type Ia supernovas of heat for us Europeans?

[–] [email protected] 5 points 1 year ago (1 children)

Type Ia supernova: 10^44 joules
Hiroshima bomb: 63 x 10^12 joules

So 1 coal mine is around 10^-24 supernovas, or 1 yoctonova.

[–] [email protected] 4 points 1 year ago (1 children)

To be honest, I won't double check that at all, but will just assume you put at least 10 minutes of effort into this.

I love you.

[–] [email protected] 3 points 1 year ago (1 children)
[–] [email protected] 1 points 1 year ago* (last edited 1 year ago) (1 children)

I see that you are a cosmologists.

[–] [email protected] 3 points 1 year ago (1 children)

Haha. Don't have to be a cosmologist to round that one.

[–] [email protected] 3 points 1 year ago* (last edited 1 year ago)

I'll thank you just for getting it. I'm not a physicist, but my dad and a lot of my close friends in my youth were. I'm so glad that the general "well you're cosmology, doesn't matter if your're off a couple of orders of magnitudes" joke still holds up.