Milan Klöwer

Milan Klöwer

@milank.bsky.social

Climate scientist. NERC Research Fellow @UniofOxford, prev Schmidt AI in Science; PostDoc @MIT, PhD @UniofOxford. #JuliaLang, open source, low carbon, free education, vegan, 🗻+🚲+🛥️. Cars ruin cities. *354ppm he|him

1.4K followers971 following191 posts

Milan Klöwer reposted

Nahel Belgherze
@wxnb.bsky.social

Bordeaux, France, has now recorded more days above 40°C in 2026 alone than during the entire 105-year period from 1920 (when observations began) to 2025. This is deeply shocking.

Milan Klöwer reposted

JuliaCon 2026
@juliacon.org

Thinking about submitting something for JuliaCon 2026, but you are unsure if you have enough for a talk? You can also submit a poster! The deadline is extended until March 7th! Submit your talks at juliacon.org/2026/cfp #julialang

Milan Klöwer
@milank.bsky.social

Join our Minisymposium at JuliaCon 2026 in Mainz, Germany this year! Feel free to reach out with any questions if you consider attending

JuliaCon 2026@juliacon.org

@milank.bsky.social, Brian Groenke, Lazaro Alonso, and Jan Swierczek-Jereczek are hosting a minisymposium on "Earth system science in Julia" at JuliaCon 2026! Learn more at pretalx.com/juliacon-202... and submit your proposal until February 28th at juliacon.org/2026/cfp #julialang

Milan Klöwer
@milank.bsky.social

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

View full thread
Milan Klöwer
@milank.bsky.social

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

Milan Klöwer
@milank.bsky.social

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.

Milan Klöwer
@milank.bsky.social

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

Milan Klöwer
@milank.bsky.social

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

Milan Klöwer
@milank.bsky.social

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

The Guardian@theguardian.com

Revealed: how aviation emissions could be halved without cutting journeys

theguardian.comRevealed: how aviation emissions could be halved without cutting journeysExclusive: Getting rid of premium seats, ensuring flights are near full and using efficient aircraft could slash CO2, analysis suggests Climate-heating emissions from aviation could be slashed in half – without reducing passenger journeys – by getting rid of premium seats, ensuring flights are near full and using the most efficient aircraft, according to analysis. These efficiency measures could be far more effective in tackling the fast-growing carbon footprint of flying than pledges to use “sustainable” fuels or controversial carbon offsets, the researchers said. They believe their study, which analysed more than 27m commercial flights out of approximately 35m in 2023, is the first to assess the variation in operational efficiency of flights across the globe. Continue reading...
Milan Klöwer
@milank.bsky.social

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

The New York Times@nytimes.com

Breaking News: OpenAI, the maker of ChatGPT, has adopted a for-profit structure, allowing it to operate like a more traditional company while it raises the billions of dollars it needs to develop artificial intelligence.

nyti.msOpenAI Restructures as For-Profit CompanyThe artificial intelligence company said that the nonprofit that controlled the organization would receive a $130 billion stake in the new company.
Milan Klöwer
@milank.bsky.social

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

Ryan Katz-Rosene, PhD@ryankatzrosene.bsky.social

"The disaster industrial complex, it turns out, is a network of supply chains that help people and governments reboot after catastrophes." Maybe climate change could be good for growth after all 🫣

Milan Klöwer
@milank.bsky.social

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!

Milan Klöwer@milank.bsky.social

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

Milan Klöwer reposted

Milan Klöwer
@milank.bsky.social

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

Milan Klöwer
@milank.bsky.social

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

Milan Klöwer
@milank.bsky.social

Big oil has always been lying to us.

Diren Kocakuşak, Ph.D.@direnkocakusak.bsky.social

A new Nature article using GEM data (@globalenergymon.bsky.social) found that the top 250 oil and gas firms own just 2% of the world's renewable power. #renewables 💡🧪 Article: www.nature.com/articles/s41...

Milan Klöwer
@milank.bsky.social

You think ripples in spectral models are weird? Yes, step functions in spectral models are represented with many "weird" oscillations. Sea level will be negative next to big mountains, etc. But that's just the equivalent of representing something smooth with little discrete steps, which arguably 🧵

Milan Klöwer
@milank.bsky.social

we are simply more used to. Think about a digital picture. You zoom in, it gets pixelated even though the real object might be smooth. We don't even question that. In high school, we learn integration of smooth functions by summing up rectangles. In the limit the approximation converges, but ...

Milan Klöwer
@milank.bsky.social

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?

Milan Klöwer
@milank.bsky.social

Is it professionally acceptable to not have MS Word/Powerpoint/Excel etc and ask for other formats? Maybe just me but I find this software exceptionally fragile: A powerpoint presentation created with powerpoint cannot be opened with powerpoint with a hint to open it with powerpoint, wut???

Milan Klöwer
@milank.bsky.social

Closed my spotify account as other music streaming services like Deezer pay 2x more to artists and don't invest into AI weapons like the Spotify CEO does. Consumer choices are important!

Milan Klöwer
@milank.bsky.social

Car drivers criticise cyclists for jumping red lights. If it’s busy or in any way potentially dangerous I 100% agree. But in other situations I also understand cyclists thinking: I don’t kill people, cars do, most road infrastructure (🚦🔄🛑⛔️…) is built to safe people and cars from cars (🤯) so I can go

Milan Klöwer
@milank.bsky.social

Senior professors affiliated with NOAA had to withdraw their presentations at EGU in Vienna because they wanted to talk about climate. And travel on personal means. This is what fascisms looks like.

Milan Klöwer reposted

Tim Reichelt
@treichelt.bsky.social

I'll be at @egu.eu 2025 next week in Vienna. You can catch me on Monday at 14:05 in Room 2.92 talking about "ClimateBenchPress: A Benchmark for Compression of Climate Data". I'll be at EGU the whole week so let me know if you want to chat about (neural) compression for climate or anything else!

Embed2Scale project@embed2scale.bsky.social

🔷 𝗘𝗺𝗯𝗲𝗱𝟮𝗦𝗰𝗮𝗹𝗲 𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗮𝗸𝗲𝘀 𝘁𝗵𝗲 𝗦𝘁𝗮𝗴𝗲 𝗮𝘁 𝗘𝗚𝗨 𝟮𝟬𝟮𝟱 🌏 As we gear up for #EGU25, we’re proud to spotlight the scientific contributions from the Embed2Scale consortium ❗ 🛰️ embed2scale.eu/2025/03/20/t... @euspa.bsky.social

Milan Klöwer
@milank.bsky.social

It was always about market manipulation. I bet Trump tells all the billionaires in advance what tariff plus minus he’s going to announce and they just sell and buy accordingly in exchange for not criticising him.

Outspoken™️@out5p0ken.bsky.social

“He made 2.5 million today and he made $900 million. That’s not bad.” Sounds like market manipulation to me. That’s bad.

Milan Klöwer
@milank.bsky.social

I have a trade deficit with my grocery store … and I think I like to keep it that way. I’m not going to sell our potatoes to the grocery store.

Aaron Rupar@atrupar.com

Rand Paul: "The whole [tariffs] debate is so fundamentally backwards & upside down. It's based on a fallacy & the fallacy is this: that somehow in a trade, someone must lose. That somehow when you trade with someone, someone is taking advantage of you... I have a trade deficit with my grocery store"