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Lady Butterfly she/her@reddthat.com to Climate - truthful information about climate, related activism and politics.@slrpnk.net · 3 days ago

Scientists call for action to address air pollution from space launches

www.theguardian.com

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Scientists call for action to address air pollution from space launches

www.theguardian.com

Lady Butterfly she/her@reddthat.com to Climate - truthful information about climate, related activism and politics.@slrpnk.net · 3 days ago
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Satellite mega-constellation missions behind threefold increase in emissions of climate-altering soot and CO2
  • Onno (VK6FLAB)@lemmy.radio
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    3 days ago

    What about satellite re-entry?

    Starlink satellites are currently re-entering at a rate of about 1 a day ¹, accounting for about 40% of upper atmosphere pollution ¹. As of August 1, 2025, there are 8,094 Starlink satellites in orbit, of which 8,075 are working, with a total of 42,000 planned ².

    Apparently, the next decade looks like 100,000 extra satellites ¹ in low Earth orbit.

    ¹ https://www.space.com/spacex-starlink-reentry-pollution-damage-earth-atmosphere

    ² ⁨https://www.space.com/spacex-starlink-satellites.html

    • VioletSoftness@piefed.blahaj.zone
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      3 days ago

      https://research.noaa.gov/noaa-scientists-link-exotic-metal-particles-in-the-upper-atmosphere-to-rockets-satellites/ back when NOAA was a thing they were looking into this and it wasn’t great

    • Fredselfish@lemmy.world
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      3 days ago

      Yeah our future fucked

Climate - truthful information about climate, related activism and politics.@slrpnk.net

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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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