this post was submitted on 27 Feb 2025
50 points (98.1% liked)

Climate - truthful information about climate, related activism and politics.

5869 readers
781 users here now

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:

Anti-science, inactivism, and unsupported conspiracy theories are not ok here.

founded 2 years ago
MODERATORS
[email protected]
50
Total collapse of vital Atlantic currents unlikely this century, study finds (www.theguardian.com)
submitted 2 days ago by floofloof to c/[email protected]
8 comments fedilink hide all child comments
you are viewing a single comment's thread
view the rest of the comments
[–] humanspiral 3 points 1 day ago

This theory may be wrong. Keeps getting brought up though, as if its one of the major risks of global warming.

Tropical Northern Atlantic ocean being a good 2C warmer than just 10 years ago, may well be the result of a weaker current flow north. But 2C warmer flowing slowly, is still warming TF out of northern Atlantic. Even without taking the current path, +2C temperature water is going to make the water just north of it +2C too.

Weaker AMOC theory is based on increased Arctic melting. So far, Arctic melting per season has been stable even as extreme record low sea ice volume occurs in last 2 summers. The melting is stable because there is less winter freezing.

The trend over last 2 years is record warm European winters because of record warm Northern Atlantic and Mediteranean. This theory developed during period of Atlantic cold spot 2016-2021, but it is gone this year.

The mistake in the theory, IMO, is measuring current flow rate instead of heat flow rate, including natural heat flow independent of current.