this post was submitted on 26 Aug 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.

Recommended actions to cut greenhouse gas emissions in the near future:

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"We need to start moving people and key infrastructure away from our coasts," warns climate scientist (www.independent.ie)
submitted 2 months ago by gytrash@feddit.uk to c/climate@slrpnk.net
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[–] protist@mander.xyz 7 points 2 months ago (2 children)

Until the Atlantic Meridional Overturning Circulation stops, plunging Ireland's temperatures by an average of 15°

[–] masterofn001@lemmy.ca 4 points 2 months ago (1 children)

As a Canadian with Irish grandparents I look forward to claiming my Irish citizenship.

15° cooler (C or F) would be lovely.

[–] protist@mander.xyz 5 points 2 months ago

I should have clarified 15°C, which would be a shift of 27°F. It's hard to overstate how devastating that would be to the ecology of Northern Europe, potentially sending Ireland near permafrost territory and ending agriculture and pastoralism as they know it

[–] benjhm@sopuli.xyz 2 points 2 months ago

It slows down, an effect of cold water from melting ice passing south of greenland, which has a local cooling effect, while the atlantic as a whole gets warmer. Consequence is a greater heat contrast along that front, which may intensify the sequence of low pressures bringing wind and rain, which is what Ireland has just experienced this summer. But the high-resolution models do not show that AMOC stops abruptly, that was a feature of simpler models designed to replicate palaeoclimatic changes at the end of the ice ages, when the amount of ice available to melt was much higher.