iiinova — where your digital self keeps evolving

Co-author here. Hit me with all your criticism 😆

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by another 16%. We are not economists and airlines would complain about all of these suggestions but we quantify the potential savings to trigger a discussion and hopefully create incentives.

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which we summarize as: More efficient aircraft will come but overhauling the whole fleet today is economically unfeasible and causes its own emissions. All economy layout (at constant load factor) has a large reduction potential of 20-50% and increasing load factors generally to 95% can reduce

The current air transport system in our study causes emissions of 578 Mt CO2 (see Methods for system boundaries). Replacing less efficient aircraft with only the two most efficient models (Boeing 787-9 and Airbus A350) would reduce emissions by 26.5% to 33.7% to 383 to 425 Mt CO2. Changing these aircraft from their current layout (premium and economy class seating) to an all-economy class layout would further reduce emissions in the range of 26.1 to 56.7%, or 166 to 313 Mt CO2. Last, increasing the load factor to 95% would further reduce emissions to a range of 139 to 263 Mt CO2. The fuel penalty incurred in additional weight is not considered, but small.

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are more efficient than others, why? The sardine airlines typically have lower efficiencies as they pack passengers denser. Some flights in more remote areas are more like public transport, potentially subsidized and often operate half empty over short distances. So there is large potential

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With "efficiency" people think about the engine thrust per amount of fuel. But airlines have an operational efficiency also depending on load factors, cabin layout (first class booh!) and aircrafts being used. We measure this in gCO2 emitted per revenue passenger kilometer. Some areas

Map of airports colorcoded by CO2 efficiency measured in gCO2/revenue passenger kilometer. North America has commonly inefficient flights, in Brazil efficient flights dominate, so in Europe. Africa has many inefficient in contrast to India and South-East Asia.

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Milan Klöwer @milank.bsky.social · 11/12/2025

Yay! We got an exclusive feature from The Guardian on our paper, published today in Nature Comm Earth&Environment www.nature.com/articles/s43... Airlines won't like it but we suggest to get rid of business and first class. Why? Because that way more people can fly for the same emissions

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How big is too big for a pull request? 😬

GitHub pull request with 4892 lines added and 4117 lines deleted

GitHub pull request summary with 129 files changed, 4892 lines of code added, 4117 lines removed over 137 commits

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Milan Klöwer @milank.bsky.social · 21/11/2025

No. You’re lying. Maybe it’s possible on some iphones not on others?

Milan Klöwer @milank.bsky.social · 21/11/2025

Turns out. I’m older than 25 and missed a massive social phenomenon 😅 and therefore misunderstood the assignment given by a 9 year old

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Milan Klöwer @milank.bsky.social · 21/11/2025

Haha. Kids gave me that hint and I thought it probably has an interesting computer science reason

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Milan Klöwer @milank.bsky.social · 18/11/2025

I think on an iPhone it’s impossible to stop for exactly 0.37s. 0.36 yes, 0.38 too but not 0.37. Why?

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Milan Klöwer @milank.bsky.social · 30/10/2025

Coolest name if you do research on something with Atlantic in the name!!

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Milan Klöwer @milank.bsky.social · 28/10/2025

Also will be renamed to ClosedAI to better reflect the company's values.

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Reposted by Milan Klöwer

Led By Donkeys @ledbydonkeys.org · 27/10/2025

Farage: epic grifter

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Milan Klöwer @milank.bsky.social · 25/10/2025

Oh yes, not saying that. I think Nvidia claiming they support the green transition is bollox. They would do their thing even if GPU were less efficient than CPUs but I still appreciate that they are more efficient and also that they have become more efficient over time

Woa? Crazy to see how well they are correlated. Anyone an explanation for that?

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Milan Klöwer @milank.bsky.social · 23/10/2025

Anyone knows how much of that can be attributed to the change to GPUs? 5 years ago some supercomputers had GPUs but not all, now it’s hard to find the CPU-only ones!

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Reposted by Milan Klöwer

How much more efficient have supercomputers become over the last 5 years? Just analysed the top 100 of top500.org : 4x for the most efficient supercomputers in the world, what was top in 2020 is now at the bottom of that Green100 list. Total energy consumption has increased nevertheless

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Like you can criticise net zero but I think it’s really efficient in communicating that net zero emissions mean to stabilise temperatures

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Yes of course but if you think of the sinks being instantaneous then those “net” are missions integrated are how we change the CO2 concentration? More wondering how to best communicate it so that people don’t make these mistakes.

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I didn't know the world largest offshore wind farm Dogger Bank is being built off the coast of Yorkshire, 4GW!!! It's huge, so cool

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Milan Klöwer @milank.bsky.social · 23/10/2025

Mathematically I say one is the integral of the other but to avoid “integral” bc jargon maybe sum over time / accumulated is better science communication?

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Milan Klöwer @milank.bsky.social · 17/10/2025

Just a funny little 1D shallow water model using Julia, Makie, and Pluto!

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It's GeoMakie with GLMakie using OpenGL as backend, then OBS to record the screen while I spin the globe manually!

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Big oil has always been lying to us.

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Haha casual office sounds in the background 🙈

Want to look at variables from a climate model simulation interactively? SpeedyWeather got you covered

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Big fan of Pluto notebooks @fonsvanderplas.bsky.social for SpeedyWeather github.com/SpeedyWeathe...

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Milan Klöwer @milank.bsky.social · 03/10/2025

GeoMakie & GLMakie usage in SpeedyWeather. Interactive climate modelling yay! Here just visualising the HEALPix grid

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on the way it looks super jaggedy. Now having spectral ripples isn't really any different, you are trying to represent something in from one space that isn't perfectly representable in another. And arguably many things in reality are smooth, so are waves or rectangles a better approximation?