this post was submitted on 12 Dec 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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Extreme heat is forcing farmers to work overnight, an adaptation that comes with a cost (grist.org)
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[–] dsilverz 3 points 1 week ago

There's this phenomenon called South Atlantic Anomaly whose one of their points is centered within the Brazilian territory (the other is centered somewhere near the west of Africa continent). I wonder how it would be a factor, together with the consequences of climate changes, in a "hotter" sunshine. Pará is located in northern Brazil, while this SAA is centered somewhere around the south or southeast (I'm not sure if it's centered at Santa Catarina, Paraná or São Paulo, because the NASA map regarding SAA doesn't show the boundaries between the states, only boundaries between countries), but it covers a significant part of the Brazilian territory (and the last maps suggest that it's growing in size).

I know that satellites often need to shut down some of their onboard systems while they're orbiting around and inside the SAA due to its effects, but I'm not sure if these effects would extend all the way to the ground.