this post was submitted on 23 Oct 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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Climate change worsened deadly Africa floods, scientists say (www.rfi.fr)
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A new analysis by the World Weather Attribution (WWA) network of scientists found warming driven by the use of fossil fuels had exacerbated the flooding in Sudan. The researchers also said climate change would have made this year's torrential rains around five to 20 percent more intense across the Niger and Lake Chad basins, citing a previous WWA study of similar floods in 2022.

Global warming is not just about rising temperatures -- the extra heat trapped in the atmosphere and seas has knock-on effects and can result in more intense downpours and storms. The researchers said there was a clear link between the extreme rainfall and a warming planet.

The scientists used modelling to compare weather patterns in our world and one without human-induced warming, and found that month-long spells of intense rainfall in parts of Sudan had become heavier and more likely due to climate change. At the current 1.3 degrees Celsius of warming, they said similar periods of rainfall are expected to occur on average about once every three years, and have become about 10 percent heavier due to climate change.

The role of climate change in the floods was compounded by other human-made problems, the researchers said, and they called for better maintenance of dams and investment in early warning systems.

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