this post was submitted on 13 Nov 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.

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Let forests grow old to store huge volume of carbon – study | Report says cutting emissions should still be key priority as it cautions against mass monoculture tree-planting (www.theguardian.com)
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For context, this would in theory allow about 1/3 historical cumulative emissions to be absorbed over a century or so. Which is a start, but nowhere near enough.

Also noteworthy: the bulk of forest-based carbon offsets have been fraudulent.

The paper is here

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[–] TropicalDingdong@lemmy.world 4 points 10 months ago (1 children)

This is a figure I'm working on for a paper on the relationship between disturbance and recovery in forests. These are some data over an old growth forest in the Pacific Northwest Cascade forest. The X is time of disturbance, and the three groups of points are three different ways of estimating forest carbon (its a known issue that two of the systems saturate around 400-500 Mg/Ha).

Most forests in this region are harvested around ~200-300 Mg/Ha, and usually harvested down to about 50-100 Mg/Ha, every 30 years.

[–] john_lemmy@slrpnk.net 1 points 10 months ago

are you going to put it on arxiv or similar? It seems like an interesting read!