this post was submitted on 30 Mar 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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temperature timeline (imgs.xkcd.com)
submitted 7 months ago by Bridger@sh.itjust.works to c/climate@slrpnk.net
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https://imgs.xkcd.com/comics/earth_temperature_timeline.png

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[–] grozzle@lemm.ee 15 points 7 months ago (1 children)

Ice that was on land will raise the sea level if it melts.

[–] Honytawk@lemmy.zip 2 points 7 months ago (1 children)

Sure, but the amount of ice on land is but a small spec compared to the water in the ocean.

If all the ice in the world melted, it wouldn't affect the ocean level that much. Compared to thermal expansion of the water.

Ice melting is a symptom, not a cause.

[–] silence7@slrpnk.net 7 points 7 months ago

You're right about sea level rise over the last century, but the big sea level rise at the end of the last ice age was in fact mainly a result of ice melting — big parts of North America and Europe had ice thousands of feet thick on them.

Melting all the ice in the world today would add almost 200 feet to sea levels.