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Kai Kornhuber

@kornhuber.bsky.social
6.1K followers 1K following 76 posts

Theme Lead Weather Extremes & Climate Dynamics at IIASA, adj. assoc. Research Scientist LDEO, Co-Chair Risk KAN

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Kai Kornhuber @kornhuber.bsky.social · 3h
At the Global Heat Forum to exchange on #extremeHeat, #health and #climateResilience. Excited about our side-event on heat-health attribution hosted by @robbieparks.bsky.social, @darbyjack.bsky.social, K. Berhane with support from @rockefellerfdn.bsky.social. @iiasa.ac.at @wmo-global.bsky.social
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Kai Kornhuber @kornhuber.bsky.social · 3h
Don't miss the upcoming @iiasa.ac.at AI for Climate Science Seminar with A. Wikner (U Chicago) co-hosted by @yilinghwong.bsky.social: 'AI Emulators for Weather and Climate: Promise, Pitfalls, and Paths Forward' 📅: Wed 7th, 4pm CET 📝: iiasa.ac.at/events/oct-2... 👩‍💻: iiasa.zoom.us/webinar/regi...
Flyer AI for Climate Science Seminar: 

📅: Wed 7th, 4pm CET
📝: https://iiasa.ac.at/events/oct-2026/ai-for-climate-science-seminar-series-ai-emulators-for-weather-and-climate-promise
👩‍💻: https://iiasa.zoom.us/webinar/register/WN_DQlvBbnmSySKjTSQdSNpBw#/registration📅: Wed 7th, 4pm CET
📝: https://iiasa.ac.at/events/oct-2026/ai-for-climate-science-seminar-series-ai-emulators-for-weather-and-climate-promise
👩‍💻: https://iiasa.zoom.us/webinar/register/WN_DQlvBbnmSySKjTSQdSNpBw#/registration
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Prof. Stefan Rahmstorf @rahmstorf.bsky.social · 30/09/2026
Big Oil remains the most significant obstacle to reducing emissions and limiting climate harms. It’s important to understand the long history of that.
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IIASA @iiasa.ac.at · 30/09/2026
Climate risks rarely happen in isolation. Heatwaves, droughts & floods can overlap or follow one another, creating compound risks. A new perspective led by IIASA's @kornhuber.bsky.social explores how science can better support real-world decisions. 🔗 nhess.copernicus.org/articles/26/... @egu.eu
nhess.copernicus.org
Invited perspectives: Towards usable compound event research
Abstract. Supporting stakeholders with science-based decision-making to mitigate and adapt to climate change impacts is a central mandate of the climate research community. In particular, mapping out ...
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World Meteorological Organization @wmo-global.bsky.social · 29/09/2026
From 6-9 October 2026, experts, scientists, policymakers and investors will meet at the #GlobalHeatForum in Bangkok to tackle the growing risks of extreme heat to health, livelihoods, environment and economies. Join WMO, @heathealth.info and partners 🔗 www.heathealth.info/globalheatforum
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Andrew Dessler @andrewdessler.com · 14/09/2026
On The Climate Brink: The Atmosphere Just Set a Water Vapor Record. Aug. 2026 probably had more water vapor in the atmosphere than any month in the last few thousand years, if not a 100,000 years. www.theclimatebrink.com/p/the-atmosp...
theclimatebrink.com
The Atmosphere Just Set a Water Vapor Record
More water vapor means more rocket fuel for extreme rain — so this record is not good news
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AGU (American Geophysical Union) @agu.org · 16/09/2026
AGU is documenting the real-world impacts of recent U.S. Administration actions that have resulted in cuts, delays, and disruptions at NSF and other science agencies. 🔗 Take the AGU Survey today: spklr.io/63321ETeec
Logo for the AGU: Advancing Earth and Space Sciences
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Kai Kornhuber @kornhuber.bsky.social · 07/09/2026
Excited to share our new perspective on Usable Compound Event Research: nhess.copernicus.org/articles/26/... We provide principles to navigate the pressing needs for more granular climate risk information in times of increasingly complex extreme weather events. @iiasa.ac.at @riskkan.bsky.social
nhess.copernicus.org
Invited perspectives: Towards usable compound event research
Abstract. Supporting stakeholders with science-based decision-making to mitigate and adapt to climate change impacts is a central mandate of the climate research community. In particular, mapping out ...
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Kai Kornhuber @kornhuber.bsky.social · 07/09/2026
Excited to share our new perspective on Usable Compound Event Research: nhess.copernicus.org/articles/26/... We provide principles to navigate the pressing needs for more granular climate risk information in times of increasingly complex extreme weather events. @iiasa.ac.at @riskkan.bsky.social
nhess.copernicus.org
Invited perspectives: Towards usable compound event research
Abstract. Supporting stakeholders with science-based decision-making to mitigate and adapt to climate change impacts is a central mandate of the climate research community. In particular, mapping out ...
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Reposted by Kai Kornhuber
IIASA @iiasa.ac.at · 04/09/2026
Join us for the next IIASA AI for Climate Science Seminar with Dingling Yao, from the Institute of Science and Technology Austria (ISTA). Topic: Beyond prediction: Answering climate what-if questions from observations. 📅 9 Sep, 16:00 CET 💻 Online Register 👉 iiasa.ac.at/events/sep-2...
iiasa.ac.at
AI for Climate Science Seminar Series: Beyond Prediction - Answering Climate What-If Questions from Observations
Artificial Intelligence (AI) and Machine Learning (ML) methods are becoming increasingly important in both science and society. In climate science - where complex biophysical and societal processes in...
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UN Environment Programme @unep.org · 02/09/2026
Global warming is set to cross 1.5°C, pushing climate risks and impacts to increasingly dangerous heights, a new UNEP report warns.   Predicted impacts include extreme weather and threats to human health and economies.
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CompoundNET @compoundnet.bsky.social · 29/08/2026
‘Understanding and predicting compound coastal flooding remains one of the most challenging problems in hydrologic and coastal sciences.’ Read the latest ‘State of Science’ blog on compound coastal flooding by Hamed Moftakhari: wp.me/p9wIOV-Xp @regclimo.bsky.social @cassro314.bsky.social
"State of the Science" graphic from CompoundNET featuring an open book with a lightbulb icon and the CompoundNET logo. Title: "Modeling of Compound Coastal Flooding," by Hamed Moftakhari (University of Alabama). Text below invites readers to share a brief summary of what they find most fascinating about new advances in their favorite research topic.
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Kris Karnauskas @oceansclimatecu.bsky.social · 19/08/2026
📣 Published today in GRL Editorial by all @agu.org Editors-in-Chief (and led by @barefootlab.bsky.social) on why we choose to publish in society journals (like AGU's) agupubs.onlinelibrary.wiley.com/doi/10.1029/...
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Zack Labe @zacklabe.com · 07/08/2026
Been trying to point this out... 😪 "U.S. corporate broadcast networks continue to treat climate context as optional in extreme heat coverage" via @mmfa.bsky.social at www.mediamatters.org/broadcast-ne...
mediamatters.org
ABC, CBS, and NBC aired nearly 200 segments about three U.S. heat events without mentioning climate change
From late June through July, successive heat waves swept across large portions of the United States, breaking temperature records and placing more than 100 million people at a time under heat alerts. ...
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Marcus Wadsak @marcuswadsak.bsky.social · 06/08/2026
Hitzetage damals, Hitzetage heute…. -> Kein Sommer wie damals.
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Kate Marvel @drkatemarvel.bsky.social · 03/08/2026
Extreme weather is complicated (there are over 150 definitions of drought in the literature!), the Earth system is complex, models are imperfect, and we still have much to learn. But it's remarkable how spot-on most of our predictions have been: drawdown.org/insights/is-...
drawdown.org
Is climate change unfolding faster and fiercer than scientists expected?
Climate change is undeniably here, and it’s bad. But is it, as some are claiming, worse than even the scientists expected?
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Gavin Schmidt @climateofgavin.bsky.social · 03/08/2026
About time! www.theclimatebrink.com/p/fixing-one...
theclimatebrink.com
Fixing one of climate’s worst plots
the 1930s were hot over the U.S. Midwest, but not that hot
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Kai Kornhuber @kornhuber.bsky.social · 03/08/2026
Please consider submitting your abstract to our @agu.org session on Compound Events with invited speakers A. Mishra (Texas A&M) & R. Horton (@climate.columbia.edu). Submission Deadline: Aug. 5th Session Details: agu.confex.com/agu/agu26/pr... @iiasa.ac.at @lamont.columbia.edu
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David Ho @davidho.bsky.social · 01/08/2026
It's important not just to memorialize people's professional achievements, but also the kind of people they were. This article detailed serious sexual assault allegations against Nims Purja, which the NY Times repeated in its reporting of his death, but many outlets did not.
nytimes.com
For Female Climbers, Dangers Go Beyond Avalanches and Storms (Gift Article)
Women are increasingly reporting sexual harassment and abuse in the sport, including accusations against the renowned climber Nirmal Purja.
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EU in Emergencies @euinemergencies.ec.europa.eu · 27/07/2026
🇪🇺 Europe stands together as wildfires continue to impact France and Spain. Through the #EUCivilProtection Mechanism, the EU has deployed: 🚒 To 🇫🇷: 7 planes & 4 helicopters from 🇨🇿🇭🇷🇩🇪🇵🇹🇸🇰🇸🇪🇹🇷 🚒 To 🇪🇸: 6 planes from 🇬🇷🇮🇹🇹🇷, plus 134 personnel & 41 vehicles from 🇵🇹 #EUSolidarity
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KarSteN Haustein @khaustein.bsky.social · 26/07/2026
In case anyone is still listening: 14.500 excess deaths have been recorded during the June heatwave in Germany alone. At least 70% (i.e. ~10.000 premature deaths) r due to man-made climate change in 1 week. The conservative RKI numbers r certainly a massive underestimate! www.rki.de/DE/Themen/Ge...
blue line showing normal mortality. red line showing excess mortality which skyrockets end of june 2026 due to extreme heat
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John Schwartz @jswatz.bsky.social · 17/07/2026
Reporters used to have to write that no single weather event can be linked to climate change. The developing science of extreme weather attribution has changed that. And those who have damaged the climate might someday have to pay. www.nytimes.com/2026/07/16/c...
nytimes.com
National Academies Report Backs Climate Change Attribution Science
Attribution science is advancing quickly, researchers said. That could support lawsuits seeking damages for severe events worsened by global warming.
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World Weather Attribution @wwattribution.bsky.social · 16/07/2026
NEW: Climate change supercharged the rainfall that caused deadly flooding that killed almost 100 in Togo, Ghana and Cote d'Ivoire. The most extreme rainfall fell between June 20-22 across coastal regions with more than 140mm falling in less than 24 hours in some major cities. (1/5)
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Jana Tauschinski @janatausch.bsky.social · 13/07/2026
Spent the past two weeks making graphics about sweltering night-time temperatures while struggling to sleep because of those same hot nights... NEW: Tropical nights come to Europe w @attractamooney.bsky.social and @nassosstylianou.bsky.social as.ft.com/r/4929ae6c-e...
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John Morales @johnmoralestv.bsky.social · 10/07/2026
Recent Belgian Heatwave Declared Deadliest on Record: “the situation during the peak weekend was so severe that excess mortality surpassed even the worst weekend of the COVID-19 pandemic. Between June 22nd and June 27th, a staggering 1,747 excess deaths were recorded.” #Belgium #heatwave #europe
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Dr. Efi Rousi @efou.bsky.social · 06/07/2026
We are hiring an #editor (in India or China) with expertise in #AtmosphericChemistry to join our editorial team at Nature Communications! Please reach out if you have questions about the role or the team!
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Prof Friederike Otto @frediotto.bsky.social · 03/07/2026
250 years of burning fossil fuels fuelled a record shattering humid heatwave in Eastern North America for the 250th anniversary celebrations on 4th of July. Turning any outdoor activities into a dangerous health risk. - @wwattribution.bsky.social www.worldweatherattribution.org/fossil-fuels...
Timeseries of the highest 5-day wet bulb globe temperature over a region bounded by the box to 95°W to 67°W and 35°N to 50°N. 2026 by far highest value highlighted in pink.
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American Meteorological Society @ametsoc.org · 01/07/2026
New AMS statement responds to a proposed OMB rule that would restructure federal grantmaking. The rule "would damage the nation’s ability to understand, predict, and respond to ... natural hazards with negative impacts on public safety and the economy." Read more: bit.ly/4awoYRO
bit.ly
New Rule Would Upend Science and Rewrite Federal Grantmaking
A new AMS statement and resource page respond to an OMB rule that would restructure federal grants and give political appointees vastly more authority over grantmaking.
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Nature @nature.com · 29/06/2026
With the far-right Alternative for Germany leading in polls for national and state elections, institutions are facing up to proposed restrictions on academic freedom go.nature.com/4an43R5
go.nature.com
Scientists fight back against far-right plans to restrict academic freedom in Germany
With the far-right Alternative for Germany leading in polls for national and state elections, institutions are facing up to proposed restrictions on academic freedom.
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RiskKAN @riskkan.bsky.social · 01/07/2026
The next Risk KAN Compound Events webinar will take place on Tuesday 7 July 8 am UTC. Ben Hague (@bhcoastal.bsky.social) will give a presentation on compound flooding in Australian estuaries under climate change. For meeting info: groups.google.com/u/1/g/riskka... or message @cassro314.bsky.social
Flyer displaying information mentioned in post as well as affiliations: WCRP, IRDR, WWRP, and Future Earth.
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Adam Kovac @adamjkovac.bsky.social · 30/06/2026
If you didn’t know, former @sciam.bsky.social owner Springer Nature sold us just three days ahead of the tally of the vote to unionize. It resulted in layoffs, including 60% of the union’s organizing committee. We’re out here to fight, to keep doing vital science journalism.
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Wolfgang Cramer @cramer-bondeau.fr · 30/06/2026
Just in case Europeans think that the air here is hotter than usual, do not forget that the sea surface of the entire planet is warmer than it has ever been in late June (since records began). pulse.climate.copernicus.eu
screenshot from copernicus, indicating 0.54°C temperature anomaly (relative to 1991-2020 average) on June 28, 2026
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Met Office - weather and climate @metoffice.gov.uk · 29/06/2026
As further data from our observation network has been made available over the weekend, the provisional new UK highest June temperature on record is 37.7°C at Lingwood, Norfolk. 🌡️
A red square saying 37.7 Celsius was recorded at Lingwood Norfolk on June 26th. Provisionally a new June temperature for the UK.
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Willem Huiskamp @willemh.bsky.social · 29/06/2026
Germany has broken its all-time heat record three days in a row. The new record, 41.7. 💀
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ProPublica @propublica.org · 25/06/2026
NEW: This is the story of how one of the most influential climate papers in history came to exist thanks to one of the companies most responsible for causing the climate crisis — and one with a financial stake in the technologies described in the paper. w/ @drilledmedia.bsky.social
propublica.org
Beyond Denial: How Oil Execs Shaped a Landmark Climate Study
BP sponsored an elite Princeton research center to address the climate problem without getting off fossil fuels. Its key work, a paper known as “Wedges,” guided climate discourse for a generation.
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IIASA @iiasa.ac.at · 25/06/2026
Congratulations to @kornhuber.bsky.social on being named an Earth System Dynamics (ESD) Editor of the Year 2025! 👏 A well-deserved recognition of his outstanding editorial work and dedication to advancing Earth system science. 🌍🎉 @egu.eu www.earth-system-dynamics.net/about/news_a...
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Leo Hickman @leohickman.carbonbrief.org · 24/06/2026
Letter in today's Times by climate scientist Sir Brian Hoskins: "The discourse around net-zero is increasingly decoupled from…science and our changing weather. "Net-zero is not an arbitrary slogan, rather it is dictated by the laws of physics."
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Météo-France @meteofrance.com · 22/06/2026
🔴🟠Un épisode caniculaire étendu, durable et intense, est en cours sur l'Hexagone. La chaleur atteint un niveau exceptionnel qui devrait durer jusqu’à jeudi au moins. De nombreux départements sont en Vigilance canicule rouge ou orange. Le point complet 👉 meteofrance.com/actualites-e...
Des conditions similaires sont attendues jusqu'à jeudi au moins, avec des maximales autour de 40 à 42 °C et des températures minimales éprouvantes, encore en hausse ces prochains jours, de 20 à 26 °C la nuit de lundi à mardi, de 23 à 28 °C la nuit de mardi à mercredi sur les départements concernés par la Vigilance.
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Météo-France @meteofrance.com · 21/06/2026
🔴🟠Les températures montent encore d’un cran à partir d’aujourd’hui pour atteindre un “plateau” très élevé au moins jusqu’à jeudi. De nombreux départements sont en Vigilance canicule rouge ou orange. Le point complet 👉 meteofrance.com/actualites-e...
Lundi 22 juin sera encore plus chaud que dimanche, avec des températures maximales atteignant 38 à 40 °C sur l’Île-de-France, l’ouest de la Bretagne et la vallée du Rhône et 40 à 42 °C du nord aquitain à la Touraine et l'Anjou. 

la température moyenne sur l’Hexagone (indicateur thermique) pourrait atteindre le niveau de la journée la plus chaude jamais mesurée en France tous mois confondus. On ne prévoit pas de changement dans les jours suivants, avec un plateau entre lundi et jeudi et un maintien des températures maximales et minimales à un niveau extrêmement élevé. Une baisse s’amorcerait à partir du vendredi 26 juin, mais cela reste à confirmer.On ne prévoit pas de changement dans les jours suivants, avec un plateau entre lundi et jeudi et un maintien des températures maximales et minimales à un niveau extrêmement élevé. Une baisse s’amorcerait à partir du vendredi 26 juin, mais cela reste à confirmer.
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Andrew Dessler @andrewdessler.com · 16/06/2026
New on The Climate Brink: How fossil-fuel interests are attacking Extreme Event Attribution science www.theclimatebrink.com/p/the-mercha...
theclimatebrink.com
Merchants of Doubt and the attacks on Extreme Event Attribution science
Doubt is still their product
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Kai Kornhuber @kornhuber.bsky.social · 11/06/2026
Great to be back at @climate.columbia.edu & @sabincenter.bsky.social to present on Attributing Agricultural Impacts from Heat and Droughts to Major Emitters at the Attribution Science & Climate Law Conference. Paper led by @yilinghwong.bsky.social Preprint: essopenarchive.org/doi/full/10....
Presentation at the Attribution Science & Climate Law Conference
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Colin Raymond @regclimo.bsky.social · 08/06/2026
Which compound weather and climate events mattered most in 2025? In a new report in @natrevearthenviron.nature.com we've taken a systematic global view to survey these events and their impacts across 5 typologies. rdcu.be/fmeAh We hope it proves useful for looking back on 'the year that was'...
rdcu.be
Compound weather and climate events in 2025
Nature Reviews Earth & Environment - Compound weather and climate events in 2025
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Kai Kornhuber @kornhuber.bsky.social · 02/06/2026
Don't miss the @iiasa.ac.at AI for Climate Science Seminar feat. @aikovoigt.bsky.social & Max Meindl @univie.ac.at (Wed 3rd, 2pm): 🧠 ”How much climate data do we need? Machine learning approaches for evaluating high-resolution climate models” 👩‍💻 Info & Registration: iiasa.ac.at/events/jun-2...
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Andrew Williams @andrewilwilliams.bsky.social · 01/06/2026
🎉 🎉🎉 We are LIVE!!!! 🎉🎉🎉 Join us for the 1st of 50 hours of non-stop weather & climate science! www.youtube.com/watch?v=v64j...
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Kai Kornhuber @kornhuber.bsky.social · 02/06/2026
Don't miss the @iiasa.ac.at AI for Climate Science Seminar feat. @aikovoigt.bsky.social & Max Meindl @univie.ac.at (Wed 3rd, 2pm): 🧠 ”How much climate data do we need? Machine learning approaches for evaluating high-resolution climate models” 👩‍💻 Info & Registration: iiasa.ac.at/events/jun-2...
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American Meteorological Society @ametsoc.org · 27/05/2026
What is at risk without federally funded weather and climate research 🌍? Next week, join AMS President Alan Sealls and President-elect Rick Spinrad during the 2nd @wclivestream.bsky.social to Save America's Forecasts and find out. 📺 Watch live 1 June 6:20 PM ET: wclivestream.com/
Graphic for the Weather and Climate Livestream event.
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The Weather & Climate Livestream @wclivestream.bsky.social · 08/05/2026
🚨 The Weather and Climate Livestream is back, June 1st - 3rd 2026!! We're streaming 50 hours for our future in the face of a new round of proposed budget cuts and attacks on science. Want to speak at the event? wclivestream.com/volunteer/
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Adam Sobel @adamsobel.bsky.social · 28/05/2026
I wrote something about creativity in science. Why would one write such a thing? That's the first question the piece addresses. There's general reasons, and then there's my current weird personal quest... deepconvection.substack.com/p/creativity...
deepconvection.substack.com
Creativity in science: why talk about it?
Because we usually don't, and we aren't good at teaching it either.
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Daniel Huppmann @danielhuppmann.bsky.social · 18/05/2026
Quite some discussion yesterday about #RCP8.5 due to some truth-posting... If you want to double-check the emissions, energy & temperature trajectories of the SSP-RCP marker scenarios, visit the SSP Scenario Explorer hosted by @iiasa.ac.at 👉 ssp.apps.ece.iiasa.ac.at/iam-quantifi...
Greenhouse gas emissions trajectories by the IAM marker scenarios for the SSP-RCP combinations (Riahi et al. 2017, Rogelj et al. 2018)
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Kai Kornhuber @kornhuber.bsky.social · 18/05/2026
Don’t miss the forthcoming @iiasa.ac.at AI for Climate Science Seminar with J. E. Guisiano @tsinghuauniversity.bsky.social 💡”Towards AI-Assisted Climate Scenario Assessment” 🔔Wed. May 20th 2pm CEST hosted by @yilinghwong.bsky.social ✍️ Info & Registration: iiasa.ac.at/events/may-2...
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