this post was submitted on 01 Apr 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.

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Is it Game Over for the 1.5 Degree Climate Limit? (youtu.be)
submitted 3 days ago by [email protected] to c/[email protected]
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Wherever you look, you'll hear headlines claiming we've passed 1.5 degrees of global warming. And while 2024 saw record breaking climate change, this might n...

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[–] [email protected] 9 points 1 day ago

For headline, yes it is game over. Video is too long. While 1.5C isn't a magical threshold for tipping points, it is an approximate one. Planet will not be cooling from here. War is huge in boosting short term use and prices and desperate FF projects ensures long term use at any price.

Tipping point for forest fires and permafrost thaw has already been breached. Lumber tariffs will make forest fires worse. While energy sector in many regions has shown peak FF use, Atmostpheric CO2 concentration rose by a near record last year. War and forest fires likely the culprit.

AMOC effects are misunderstood. Europe likely to stay/get warmer every winter, as Atlantic overall gets warmer. AMOC slowdown is just tropical Atlantic getting extra hot, but the heat will still move north, and Arctic ice extent/volume will ensure longer summer that makes European/Arctic winters warmer, and ever hotter northern Atlantic end of summer temperatures.