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KarSteN Haustein

@khaustein.bsky.social
2.4K followers 1.1K following 516 posts

Human | Climate Scientist | Meteorologist | Stormchaser | Queer @unileipzig | ex-@ecioxford | @S4F | YIMBY | he/him 🏳️‍🌈🏳️‍⚧️🦄 💕 #bekind #diversity #equality #empathy #inclusivity #fightfascism #WakeTheFuckUp!! #TeamJoyResistance thueringen-weltoffen.de

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Zeke Hausfather @zekehausfather.com · 8h
I often see people argue that clean energy is not reducing emissions, because it just adds to rather than replaces fossil fuels. This argument is deeply misguided – clean energy built since 2005 has displaced 23 billion tons. I dive in over at The Climate Brink:
theclimatebrink.com
What if the world hadn't built wind and solar?
Clean energy does not simply “add to” global energy use; it displaces fossil sources that would otherwise get built.
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Fietser @americanfietser.bsky.social · 13h
City centers should not be a drive through, they should act as a shared living room.
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Melissa & Chris Bruntlett @modacitylife.com · 18h
Monday morning outside Rotterdam Centraal, thousands of cyclists stream toward the station in a carefully choreographed flow. What you’re seeing is the power of systems thinking—the bicycle and train both succeed because they work together seamlessly, where each mode extends the reach of the other.
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David Zipper @davidzipper.bsky.social · 04/10/2026
"Cycling and walking to work were associated with better physical health, mental health, and life in general than driving." doi.org/10.1016/j.tr...
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Guido Kühn @guido-kuehn.bsky.social · 03/10/2026
Die Medien kennen seit der Berlinwahl nur noch ein Thema: die Skandalisierung, dass eine junge Linke mit sozialen Ideen regierende Bürgermeisterin von Berlin werden könnte. Nur falls später jemand mal fragt, wie es sein konnte, dass Nazis nahezu unbemerkt zum ersten Mal seit 33 die Macht ergriffen.
Illustration von Menschen, die mit Plakaten und Bannern einen überdimensionalen AFD Logopfeil hinter sich verdecken. auf den Plakaten steht: 
- Elif Eralp wird deiner Oma ihr klein Häuschen enteignen!
- Das Ende von Berlun heißt Elif Eralp!
- ERALP!
- Fürchtet ELIF ERALP!
- EILMELDUNG ELIF ERALP AUF WAHLPARTY DER LINKEN GESEHEN!
- Elif Eralp ist eine Linke!!1!!
- Elif Eralp ist eine FRAU!!
- ELIF ERALP streicht Butter unter die Nuss-Nougat-Creme!!
- Elif Eralp würde bei Unfal das ROTE(!) Kreuz rufen!
Textzeile: Funktion und Selbstverständnis der deutschen Presse. Wenn Nazis erstmals seit 1933 eine Regierung stellen
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KarSteN Haustein @khaustein.bsky.social · 04/10/2026
Don't ask what your city can do for you, ask what you can do for your city. #TheFutureIsUs Yet, never stop demanding your city to deliver the green future we all deserve! #TheFutureIsGreen
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Ursulala @ursulala.bsky.social · 03/10/2026
Saigon entsorgt seinen Müll
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David Ho @davidho.bsky.social · 03/10/2026
Things you learn in an elevator: In Switzerland, it is illegal to own a single guinea pig because these animals need social interaction.
An elevator screen with a black frame displays trivia in French about guinea pig ownership. The blue screen shows a clock in the top-left corner set to 13:52 and a date of 03/10/2026. Next to this is French text that reads "En Suisse, il est illégal de posséder un seul cochon d'Inde car ces animaux ont besoin d'interaction sociale." (which translates to: "In Switzerland, it is illegal to own a single guinea pig because these animals need social interaction."). Below the time is a large blue panel with white text, "RC," which means "Rez-de-Chaussée" or ground floor, with a downward-pointing arrow and a small circle with a line through it. An illustration below the French text depicts three reddish-brown, white, and black guinea pigs grouped together over a bowl against an orange background, with a dark branch with leaves on the right.
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Bluesky Fanatic @blueskyfanatic.bsky.social · 03/10/2026
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London & Southeast🔅 @thesnowdreamer.bsky.social · 03/10/2026
2026 has likely finished with 85 days exceeding 25C at #London Heathrow Airport this is a staggering 25 days above next highest year, 2018. We've never known anything like it.
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Secular Talk @kylekulinskishow.bsky.social · 03/10/2026
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The Virologist 🇳🇱🤙 @thevirologist.bsky.social · 02/10/2026
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Jennifer Shin - WTAF @jennifershin.bsky.social · 02/10/2026
Every time I read the news....
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Frederik Mallon @freddy.volksverpetzer.de · 02/10/2026
Vielleicht der wichtigste Fakten-Snack diese Woche: Kostenvergleich zwischen D-Ticket, Tankrabatten und anderen Steuervergünstigungen für den individualisierten und Flugverkehr. Grafik von @correctiv.org @sebastianhaupt.bsky.social
Säulendiagramm mit verschiedenen Verkehrssubventionen und wie viel sie kosten (durch Zahlungen oder verminderte Steuereinnahmen):

Deutschland-Ticket: 3 Mrd. Euro
Tank-Rabatt: 4,1 Mrd. Euro (Mai-Juni und Oktober-Dezember addiert)
Dienstwagenprivileg: 4,2 Mrd. Euro
Pendlerpauschale: 5 Mrd. Euro
Dieselprivileg: 7-8 Mrd. Euro
Steuerbefreiung Kerosin: etwa 8 Mrd. Euro
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Laura G Mitchell @lauragmitchell.com · 02/10/2026
Sometimes I’m jealous of my kids’ childhood… Just hanging out, hugging and petting our puppy in a cargo bike on the way to school on a beautiful fall morning in Minneapolis. 🚲 ❤️ 🐶
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Universität Jena @uni-jena.de · 02/10/2026
Die #UniJena erhält den Status einer Exzellenzuniversität! Die Exzellenzkommission hat den Antrag „Light. Life. Liberty. – Connecting People and Ideas“ am heutigen 2.Oktober positiv entschieden. 🥳
Das Hauptgebäude der Friedrich-Schiller-Universität Jena mit den Flaggen "LIGHT. LIFE. LIBERTY. Connecting people and ideas." Foto: Nicole Nerger / Uni Jena
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David Ho @davidho.bsky.social · 02/10/2026
When climate scientists say things are going to be horrendous, people find out many years later that we’re right. With this El Niño, the “find out” part will come in months.
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Climatologist49 @climatologist49.bsky.social · 02/10/2026
September 2026 was the second warmest September on record globally according to ERA5 reanalysis. As @khaustein.bsky.social noted yesterday, a cool September in Antarctica kept this September from breaking the record set in 2023.
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Andy Scollick @andyscollick.bsky.social · 02/10/2026
Although the SNCF carried nearly 100 million passengers this summer, the adverse weather conditions resulted in a loss of 80 million euros. The company is accelerating its action plan to cope with the warming of the climate. (Voyages d'Affaires)
voyages-d-affaires.com
SNCF adapts to climate change
SNCF was affected by the weather events this summer. The company will therefore accelerate its action plan to deal with global warming.
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Prof. Ian Walker @ianwalker.bsky.social · 02/10/2026
Autonomous vehicles offer to entrench, for another generation, the idea that the any other use of urban streets must come second to the rapid movement of metal boxes
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Sam Burgess @oceanterra.org · 02/10/2026
Europe didnt just experience an exceptionally hot summer in 2026. It experienced a summer where multiple climate extremes reinforced each other. First - temperature records were broken at daily, monthly and seasonal scales across Europe Read more: climate.copernicus.eu/summer-revie...
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Zack Labe @zacklabe.com · 02/10/2026
This is pretty wild... the average global sea surface temperature (outside of the polar regions) is still above 70°F (21.1°C) through the end of September. This is significantly above the prior record. We'll cover this in our October climate briefing: climatecentral-org.zoom.us/webinar/regi... 🌊
Line graph time series of daily global mean sea surface temperatures from 1982 to 2026. This year is currently at record high for this time of year. Data is from NOAA OISSTv2.1, and the graphic is created by Climate Central at https://www.climatecentral.org/climate-briefings.
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London & Southeast🔅 @thesnowdreamer.bsky.social · 01/10/2026
September 2026 was yet another exceptionally warm month in London. An average temperature of 18.7C at LHR which is +2.8C above 1991-2020 climatology only behind 2023. These temps would be v near normal in July and August but the 30-year baseline is much trailing behind the rapidly warming climate.
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Zentrum für Politische Schönheit @politicalbeauty.bsky.social · 01/10/2026
Das meiste, was wir uns so schön über den Aufstieg der NSDAP zurecht gelegt hatten, sind absoluten Nazi-Mythen aus dem Dritten Reich. – Es ist völlig unklar, wie und weshalb die NSDAP 1929-1930 so plötzlich erfolgreich wurde. Interview mit dem Guardian.
theguardian.com
‘Hitler was a lazy criminal who slept in until noon’: why most of what we think we know about the rise of the Nazis is wrong
In a new book, German artist and writer Philipp Ruch argues that viewing the ascent of Hitler’s NSDAP through the prism of the Third Reich has distorted our understanding of fascism’s electoral breakt...
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Melaine Le Roy @subfossilguy.bsky.social · 01/10/2026
Devastating! 😱 The figures have just been published by glamos.ch Swiss glacier have lost 5.5% of their volume this year! (2nd worst year just after 2022)! Since 2022, 20% of total ice volume has gone! 📈 20%...in just FIVE years! 🧊🔥 Full report: doi.glamos.ch/pubs/annualr...
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Zack Labe @zacklabe.com · 01/10/2026
Happy October 1st and start to spooky season (though for me, that begins in September 👻). It's my favorite time of year, so I thought I would kick it off with something pretty scary!
Four global maps showing near-surface air temperature anomalies for the month of October in 1986-1995, 1996-2005, 2006-2015, and 2016-2025. Most all areas are observing long-term warming, which is largest over the Arctic region. Anomalies are calculated relative to 1951-1980 from ECMWF ERA5 reanalysis.
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Prof Friederike Otto @frediotto.bsky.social · 01/10/2026
After a year of many experiencing the brutal reality of climate change, not least in Nepal, COP31 will happen & could provide an opportunity to bring the urgent need to massively accelerate global action on climate change back in focus- maybe - we'll talk about it: www.imperial.ac.uk/events/21370...
the poster announcing the event, same text as in link
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Prof Ian Hall @ianhall.bsky.social · 01/10/2026
🌊 The concerning thing isn’t just that global SST is at a record-breaking +0.75°C above the 1991–2020 baseline. It’s the trajectory 🤯
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Marc Raschke @marcraschke.bsky.social · 01/10/2026
Beim Deutschlandticket sind „hohe Energiekosten“ der Grund, weshalb es teurer wird. Beim Tankrabatt sind „hohe Energiekosten“ der Grund, warum Benzin „billiger“ wird. Und die CDU wundert sich, warum sie bei Wahlen abschmiert und bald keine Rolle mehr spielen wird?
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Brent Toderian @brenttoderian.bsky.social · 01/10/2026
It’s remarkable how many people can move on a street when those people don’t feel the need to always take a massive car with them. Mobility in cities is about space.
Busy European street with buses filled with people in a long line of people on bikes, waiting for the light to change in a separated, protected bike lane. Imagine if all those people or each in a separate car.
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Miaganga @miaganga.bsky.social · 01/10/2026
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Deutsche Umwelthilfe @umwelthilfe.bsky.social · 30/09/2026
#Deutschlandticket-Preis 2027 steigt auf rund 67 Euro: Mit nur einem Teil der Kosten für #Tankrabatt hätte sich das verhindern lassen. Wir fordern Ende der fehlgeleiteten Verkehrspolitik: 29-Euro-Ticket als Entlastung für ein Jahr, danach max. 49 Euro! www.duh.de/presse/press...
duh.de
DUH kritisiert: Teureres Deutschlandticket, aber Milliarden-Tankrabatt
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KarSteN Haustein @khaustein.bsky.social · 30/09/2026
The tale of two Septembers. 2026 vs 2023. Both equally warm in the Northern Hemisphere, but Antarctica makes all the difference. Record warm in 2023, below average in 2026. Hence 2026 likely only 2nd warmest such month in recorded history #ClimateEmergency #ElNiño
Map of the globe with red and blue colours for warm and cold departures from the long-term temperature mean (1981-2010). All but Greenland and large parts of Antarctica (which are blue) in red. The tropical Pacific in dark red as well.Map of the globe with red and blue colours for warm and cold departures from the long-term temperature mean (1981-2010). All but parts of Greenland and small parts of the polar south (which are blue) in red. The tropical Pacific in notable red as well.
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Brent Toderian @brenttoderian.bsky.social · 30/09/2026
Paris has been praised in recent years for their visionary, progressive city-building, but they don’t get enough credit for just being really pragmatic! Everything they’ve been doing is common sense. They’re moving a lot more people with less space while cleaning the air and cooling the city.
People riding bikes in a full separated bike-lane in Central Paris.Cars jamming a street in central Paris.
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Lior Steinberg @steinberg.nu · 30/09/2026
Urban trees: the city's natural air conditioning. 🌳 Video: Ecosia
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Fietser @americanfietser.bsky.social · 30/09/2026
Motorists in a city:
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Melissa & Chris Bruntlett @modacitylife.com · 30/09/2026
Safety alone isn't enough to get more women cycling. Cities must start building cohesive networks connecting the myriad places women need to go. This means looking beyond “Can women cycle safely here?” and asking: “Can women use this network to live their lives?” LISTEN: www.dw.com/en/why-arent...
A collage of women of all ages and abilities cycling in the Netherlands.
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Mayor Zohran Kwame Mamdani @mayor.nyc.gov · 30/09/2026
Black text on a white page that reads as follows: 

Too often, homeless New Yorkers cycle from our hospitals to our streets — making it harder to continue treatment and find long-term stability. 

The City's Bridge to Home program in Manhattan ends the cycle by providing a safe place for New Yorkers to live while they receive medical care, apply to jobs, and find an apartment. The program has been a massive success.

Today, we’re expanding Bridge to Home to Brooklyn and Queens, so more New Yorkers get the help they need.
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Rebecca Solnit @rebeccasolnit.bsky.social · 30/09/2026
Time for this classic again.
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Mika Rantanen @mikarantane.bsky.social · 30/09/2026
The 10th Copernicus Ocean State Report (OSR10) was published today: marine.copernicus.eu/news/publica... In the report, we have a paper on record-low sea levels in the Bothnian Bay in Nov 2024, caused by an extreme windstorm event (Storm Jari). Open-access paper: sp.copernicus.org/articles/7-o...
sp.copernicus.org
Record low sea levels in the Bothnian Bay in November 2024
Abstract. On 21 November 2024, there was an extreme event within the Bothnian Bay, a sub-basin of the Baltic Sea, when a record low sea level of −153 cm was measured at Kemi, at the northern end of th...
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Robert Rohde @rarohde.bsky.social · 30/09/2026
Temperatures in the Central Pacific El Niño region are the hottest ever measured (top panel), and far above any other El Niño at this time of year. But, if you adjust for the warming of the global ocean, the current trajectory is not so different from other very strong events.
Two panel plot showing daily time series of temperature anomalies in the Central Pacific Nino3.4 region during the last four strongest El Niño events without and with correction for changes in global ocean mean temperature.
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Bergwelt🇨🇭 @bergwelt.me · 30/09/2026
Ende September: Das #Matterhorn ist schneefrei. 😢 Der #Klimawandel setzt den #Alpen immer mehr zu. Laut MeteoSchweiz war es von April bis September in der #Schweiz so warm und so trocken wie noch nie in den vergangenen 160 Jahren.
Vergleichsbild des Matterhorns vom 29. September 2026 und 29. September 2025. Oben ist die Landschaft rund um das Matterhorn weitgehend schneefrei und von grauem Geröll und Fels geprägt. Unten sind das Matterhorn und die umliegenden Hänge ein Jahr zuvor grossflächig mit Schnee bedeckt.
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London & Southeast🔅 @thesnowdreamer.bsky.social · 30/09/2026
Historically late tropical night unknown for time of year. Still needs to be confirmed Heathrow fell just short 19.9C but seems inner London, St James’s Park stayed above 20C.
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Brent Toderian @brenttoderian.bsky.social · 29/09/2026
“Paris has embarked on a grand transformation, planting 155k trees, adding hundreds of kms of bike lanes, pedestrianising 300 school streets and banning cars from the banks of the Seine. Parking has been turned into green space…Fewer parents fear their child being run over when they walk to school.”
theguardian.com
How Paris swapped cars for bikes – and transformed its streets
Under Anne Hidalgo – mayor for 12 years until last week – the French capital added bike lanes, cut traffic and reclaimed public space, but not without resistance
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Cleanthinking.de - Sauber in die Zukunft @cleanthinking.wsocial.eu · 29/09/2026
Weltrekord in der Lausitz: Der Höhenwindturm in Schipkau ist 365 Meter hoch. Das höchste Windrad der Welt. Nach dem Berliner Fernsehturm ist er das zweithöchste Bauwerk Deutschlands. Es fehlen drei Meter. Und schon Ende Oktober könnte er Strom ins Netz speisen, sagt GICON-Chef Jochen Großmann.
cleanthinking.de
Höhenwindturm: Höchstes Windrad der Welt erreicht 365 Meter
Der Höhenwindturm von GICON in Schipkau hat 365 Meter erreicht und ist mit 300 Metern Nabenhöhe das höchste Windrad der Welt.
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Graeme L Scott @glscott.bsky.social · 29/09/2026
www.eco-business.com/press-releas...
eco-business.com
Every US$1 invested in climate and clean-air action can return US$15: UN
Every US$1 invested in tackling climate change and air pollution together can generate around US$15 in economic benefits, according to a report published today by the UN Environment Programme (UNEP) a...
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Jan Rosenow @janrosenow.bsky.social · 29/09/2026
Wind and solar supplied 33% of EU electricity in the 12 months to August 2026, against 29% from fossil. In 2016 it was 13% and 43%.
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ebisback.bsky.social @ebisback.bsky.social · 28/09/2026
Wow! Can we clone this man? Asking for every American City! 😍
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Dakota Smith @weatherdak.bsky.social · 28/09/2026
The evolution of this weekend's nor'easter.
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Steve Chambers @planningtransport.co.uk · 28/09/2026
Thanks for reminding me of this.
A short history of traffic engineering show walk, cycle, transit and car routes over time with cycling and walking getting worse.
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