this post was submitted on 07 Apr 2024
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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: 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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‘Simply mind-boggling’: world record temperature jump in Antarctic raises fears of catastrophe (www.theguardian.com)
submitted 7 months ago* (last edited 7 months ago) by soloojos@lemmy.ml to c/climate@slrpnk.net
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[–] perestroika@slrpnk.net 1 points 7 months ago* (last edited 7 months ago)

Poleward winds, which previously made few inroads into the atmosphere above Antarctica, are now carrying more and more warm, moist air from lower latitudes – including Australia – deep into the continent, say scientists, and these have been blamed for the dramatic polar “heatwave” that hit Concordia. Exactly why these currents are now able to plunge so deep into the continent’s air space is not yet clear, however.

Even if they cannot explain the "how", it seems beyond doubt that the process can happen repeatedly.

When it happens repeatedly, one should plan for faster Antarcic ice loss, since the excess heat of the rest of the planet can now increasingly reach and melt glaciers.

That has implications for coastal regions everywhere on the planet. Don't build on the coast. Make plans for higher storm surges and sea level rise. And - needless to say - don't add greenhouse gases to the atmosphere.