Research fellow at @OxfordPhysics + @NCEOscience focusing on satellite data for weather and climate | Occasional Pilot | he/him | 
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Happy to see our new paper, led by @milankloewer, published today. It explores the contributions of aviation to #ClimateChange:
https://iopscience.iop.org/article/10.1088/1748-9326/ac286e …
We find that aviation is responsible for around 4% of climate warming, despite producing only 2.5% of CO2 emissions. (1/7)pic.twitter.com/9PkJbqOtuh
The aviation industry likes to talk about net-zero CO2, but we show that's only part of the problem: Contrails and non-CO2 emissions also drive climate change but are not part of the discussion. This needs to change, and uncomfortable questions need to be asked. (2/7)pic.twitter.com/HewHTbrR8p
We show that by 2050 aviation may consume one-sixth of our entire budget of remaining warming before our climate hits the 1.5C limit set in the Paris Agreement. (3/7)
Prior to covid, the number of flights was steadily increasing: Seen here in this graph of flights over Europe. With air travel now picking up again so are emissions. Analysts expect flights to exceed pre-covid numbers in the next few years. Is this a sustainable trend? (4/7)pic.twitter.com/dPa64j1e6X
We show that a small reduction in flights, 2.5% per year, will halt aviation's contribution to further global warming. This is good news! We don't need to stop flying, just to be sensible and cut out frivolous journies - make some of those business meetings virtual! (5/7)pic.twitter.com/hyCAaNUYHG
Even better: We show that switching to sustainable jet fuels will also halt global warming from aviation. Especially if we couple this to other climate-friendly solutions. All achievable, just takes coordinated effort from industry (6/7).pic.twitter.com/dHCbRoCCMR
So, aviation's disproportionate impact on the climate can be solved. But we need to dispense with greenwashing, stop focusing on net-zero CO2. We need to fly a little bit less and push for proper industry change: No tankering, sustainable fuels, better flight routing. (7/7)pic.twitter.com/IAuLjcER4A
This raises interesting questions around Hydrogen powered aircraft as an alternative fuel. No condensation nuclei coming out of a fuel cell but pure water vapour.
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