this post was submitted on 14 Jul 2023
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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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How fast are the seas rising? Global sea level has risen 6.7 inches (170 mm) over the past 100 years — and the rate of rise has doubled since the 20th century. (yaleclimateconnections.org)
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[–] cxtinac 2 points 2 years ago* (last edited 2 years ago)

Depending on increased Arctic and Antarctic glacial instability the rates could well accelerate even more.

James Hansen & colleagues at Columbia have published very detailed analysis based on partial analogy with the Palaeocene-Eocene thermal maximum (very roughly same CO2 levels as today) suggesting that short term (say 100yr) rise could be quite a few feet, and long term (say 1000yr) rise could be over 200 feet.

Try drawing say 10 and 200 ft elevation contours on the eastern seaboard and Gulf!