this post was submitted on 13 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:
How much each change to the atmosphere has warmed the world:
Recommended actions to cut greenhouse gas emissions in the near future:
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Heating is accelerating. IF we stop adding greenhouse gases to the air, the heating should stop. It won't go back down without removing massive amounts of CO2, though.
Unless we crossed a tipping point. If so, the heating could continue although we stopped.
It won't stop unless we also remove the greenhouse gases that we put there
Unless I misunderstood, the article claims otherwise.
Yes, net zero, which some companies and countries pledged to reach until 2050. Unfortunately it's delusional, because they count on technological fixes being invented in the future and until then it's "business as usual".
Industries like cement, chemical and steel will never be net zero without carbon capture for example.
Organic plant based cement is already a possibility, yet we're still using the good old mixes purely to avoid change
@Neato @silence7
But how will the shareholders get that 17th yacht?
The atmosphere stores negligible heat (only weather, not climate), but the ocean has a much greater capacity than the atmosphere, for both heat and CO2 (mainly in the form of HCO3-), and it takes a long time (centuries - millenia) to fully mix the ocean. Also it takes ages for icecaps to melt. If you really stop adding CO2, concentration in the atmosphere will go down slowly as it mixes into deeper ocean, but not back to preindustrial, the surface temperature will likewise go down slowly and partially after a slight lag, but ice will keep melting (-> sea-level rises) for a while. Other gases and aerosols make short term response more complex.
There's no rule of thumb that summarises it, but I made an interactive model - here.