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

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.

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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 · 6mo ago

@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

Julia is an increasingly established language for Earth and climate science due to interactivity, productivity, performance and a growing software stack for high-performance computing, big data analysis and visualisation. It empowers developers to build performant Earth-System model components in a composable way, thus allowing users to easily become developers themselves and fostering collaborative work. In this minisymposium speakers will present software projects used for and in Earth system science.

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.

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 · 10mo ago

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

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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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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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 🧵

Title: Grid space vs spectral space; Subtitle: You think ripples are weird?; Step function in black, oscillatory approximation in blue; 2nd subtitle: So are discrete steps; Smooth blue function approximated by a black step function

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???

Microsoft PowerPoint error message saying "Sorry, we can't open this presentation becasue we ran into a problem. To view or edit this presentation, open it in Microsoft PowerPoint"

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!

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