this post was submitted on 17 Jan 2025
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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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[–] benjhm@sopuli.xyz 2 points 7 hours ago

It's interesting that the rise at Mauna Loa is a bit higher than the global average. From such differences one gets a clue about the origins (useful as regional biospheric and oceanic sources and sinks are still hard to quantify precisely). I note also that they are predicting a lower rise in 2025. So, if I read it correctly, there's a small sign of hope that the trend may get better, as the factors which contributed to this anomalous rise were more in the early part of 2024, related to the earlier El Niño. Unless the latter returns again soon - keep an eye on the pacific heat.