this post was submitted on 27 Dec 2023
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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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Pilot Project Sends Kelp–and Carbon–to the Seafloor (spectrum.ieee.org)
submitted 10 months ago by poVoq@slrpnk.net to c/climate@slrpnk.net
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[–] Five@slrpnk.net 7 points 10 months ago* (last edited 10 months ago)

Rod Fujita, director of research and development for EDF’s oceans program, questions the approach of growing kelp for combating climate change. It’s hard to measure how much carbonseaweed sequesters, he notes, because fish and microbes feed on seaweed, then exhale it as carbon dioxide.

Also, they're not just using sunlight and carbon dioxide, but also extracting other nutrients from the ecosystem and sequestering it with the carbon.

Every nightfall, cranks mounted on a floating platform lower the ring 25 meters below the surface to expose the seaweed to cooler, more nutrient-rich water.

I could see this going wrong in a number of ways. I hope they permit a lot of open research on the initiative so there are several layers of accountability and everyone can learn from it.