this post was submitted on 17 Mar 2024
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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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A cargo ship’s ‘WindWing’ sails saved it up to 12 tons of fuel per day (www.popsci.com)
submitted 7 months ago by [email protected] to c/[email protected]
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[–] [email protected] 16 points 7 months ago (1 children)

According to that video, they fold out of the way. I'm not sure if they currently fold on the real ones. The article mentions:

the 125-feet of height added by WindWings could potentially complicate docking in many locations. According to Jan Dieleman, president of Cargill’s Ocean Transportation business, they’re already working to address such issues.

Which seems to imply they don't. Their solution of modifying ports to accommodate the sails might mean the folding aspect wasn't viable?

[–] [email protected] 6 points 7 months ago

Not sure about this one example but working in the industry and following the development of wing sails the ones I've seen will fold one way or the other. This example in the article is probably a prototype or even experimental implementation to test the efficency.

Examples of folding sails in development: https://www.theoceanbird.com/oceanbird-wing-560/

https://terntank.com/2023/02/sail-into-the-future/