this post was submitted on 20 Nov 2023
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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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Earth passed a feared global warming milestone Friday, at least briefly | Average global temperatures were more than 2 degrees Celsius above a pre-industrial benchmark on Friday, preliminary data show (wapo.st)
submitted 2 years ago by silence7@slrpnk.net to c/climate@slrpnk.net
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I'll note that for most purposes, when people talk about going to 2°C above what it was in the late 1800s, they usually are talking about the long-term average, not one-day events.

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[–] Catoblepas@lemmy.blahaj.zone 7 points 2 years ago

These articles that conflate a 2ºC higher daily average with the disastrous consequences of a 2ºC higher yearly average make me nervous. Most people aren't going to get the distinction when it's not being spelled out, and I question whether noting every day it goes over the average is even a useful metric to begin with compared to the yearly average.

If we keep having articles like this a few days a year I worry people are going to get numb to it when they don't see immediate consequences.