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Items tagged with: Ozone


🍳 In LA, cooking emissions rival fossil fuels as ozone pollution source

phys.org/news/2025-03-la-cooki…

#pollution #airquality #la #cooking #california #environment #ozone


D'après une nouvelle étude, c’est bien la #réaction #décisive de l’ #humanité qui permet au trou de la #couche d’ #ozone de se refermer.
Les auteurs de l'étude rappellent également que la lutte contre le #changement #climatique n’est pas perdue d’avance

#Trump

journaldugeek.com/2025/03/14/l…


China Daily: New study reveals methane’s role in ozone layer recovery…

Chinese researchers have revealed that increases in #methaneemissions could have an unexpected positive impact on future #ozone recovery... #research #environment

formuchdeliberation.wordpress.…


Bad news for the impact of increasing rocket launches on the terrestrial #environment: "Our ‘ambitious’ scenario (2,040 launches/year) leads to a -0.29% depletion in annual-mean, near-global total column #ozone, relative to a simulation with no rocket launches. Antarctic springtime ozone decreases by 3.9%. Our ‘conservative’ scenario (884 launches/year) leads to a -0.17% annual depletion; current licensing rates suggest this scenario may be exceeded sooner than 2030."

researchsquare.com/article/rs-…

#SpaceEnvironment #SpaceEnvironmentalism #Space #SpaceSustainability


New Threat to Earth’s Ozone Layer from Low Earth Orbit Satellite Burn-up on Reentry Generating Aluminium Oxides youtu.be/dIw32yO8NJ0?si=FMQE3x…

#climate #ClimateCrisis #atmosphere #ozone


#Starlink
spaceweather.com/archive.php?v…

"The sustained rate of daily reentries is unprecedented," says Jonathan McDowell, an astronomer at the Harvard Center for Astrophysics who tracks satellites. "They are retiring and incinerating about 4 or 5 Starlinks every day."

What we're observing is a giant uncontrolled experiment in atmospheric chemistry. The demise of just one Gen1 Starlink satellite produces about 30 kilograms (66 pounds) of aluminum oxide, a compound that eats away at the #ozone layer


"We need to [search] under every stone to try find ways to mitigate #ClimateChange."

It's not just about #carbon, that's truly limited and inefficient thinking.

All #GreenhouseGasses are a problem, including #NitrousOxide (#N2O).

Just as we successfully acted to save the #Ozone layer, we can do Everything, Everywhere, All at Once to preserve what remains of our total #environment.

It's terrifying and critical but it's not hopeless, it's possible.

youtu.be/47AJuaYPvJI?si=tbUmGO…



"CO2 is responsible for around 55% of global warming to date. The other 45% comes from #SuperPollutants: #methane; black carbon; #fluorinated gases; #NitrousOxide; and tropospheric #ozone.

As well as being substantial contributors to global warming, super pollutants are a major threat to human health.

carbonbrief.org/guest-post-how…


"Ozone recovery delayed 17 years by feedstock emissions, old gear"

#Ozone #Emissions

phys.org/news/2024-12-ozone-re…


Hundreds of defunct #satellites plunge through Earth’s #atmosphere yearly, and the count is rising.

The dying satellites, it turns out, don’t just wink out into the ether. Each one leaves a bit of itself behind.

The satellites’ fiery death throes, along with a steep rise in the number of rocket launches, are adding a glut of ozone-destroying and climate-altering pollutants to the #stratosphere.

For instance, aluminum oxides are catalysts for #ozone depletion.

#space
sciencenews.org/article/satell…


Proof that #EnvironmentalPolicy works: "During the peak of #ozone depletion season, the 2024 area of the #OzoneHole ranked the seventh smallest since recovery began in 1992, when the #MontrealProtocol, a landmark international agreement to phase out ozone-depleting chemicals, began to take effect."

earthobservatory.nasa.gov/imag…

#Environment


SpaceX Starlink satellites add half a tonne of aluminium to the atmosphere each day

space.com/spacex-starlink-reen…

'This aluminum ash accumulating at high altitudes worries scientists because of its potential to damage Earth's protective ozone layer and alter its albedo — the ability to reflect sunlight — which could result in changes in the temperature of the upper atmosphere.'

#SpaceX #Starlink #satellites #technology #space #pollution #environment #ozone


"Currently, the space industry contributes only about 0.1% to the overall damage to the ozone layer caused by humankind. That seems negligible, but researchers caution that, ... the air pollution their incineration produces will remain in the air for decades, maybe centuries. The same goes for the soot and gases from rocket exhaust."

space.com/spacex-starlink-reen…

#Space #SpaceSustainability #SpaceX #Satellites #Ozone #Environment #Pollution