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Reposted by Lukas Brunner

Lukas Brunner @lukasbrunner.bsky.social · 22/09/2026

Nice news article from the CLICCS cluster of excellence on our new study introducting the Variability Atlas 👇 @uni-hamburg.de @esrah.uni-hamburg.de www.cliccs.uni-hamburg.de/about-cliccs...

cliccs.uni-hamburg.de

New online tool helps forecast heatwaves and torrential rains

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Lukas Brunner @lukasbrunner.bsky.social · 22/09/2026

Nice news article from the CLICCS cluster of excellence on our new study introducting the Variability Atlas 👇 @uni-hamburg.de @esrah.uni-hamburg.de www.cliccs.uni-hamburg.de/about-cliccs...

cliccs.uni-hamburg.de

New online tool helps forecast heatwaves and torrential rains

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Lukas Brunner @lukasbrunner.bsky.social · 21/09/2026

🚨New publication How does internal climate variability affect the calculation of the ETCCDI temperature and precipitation extreme indices? In our paper, we introduce the Variability Atlas, a flexible toolset to address this question for users of all experience levels! doi.org/10.1088/1748...

doi.org

The variability atlas: how internal climate variability affects the estimation of climate extreme indices

The variability atlas: how internal climate variability affects the estimation of climate extreme indices, Brunner, Lukas, Mithal, Vidur, Borchert, Leonard F, Sillmann, Jana, Poschlod, Benjamin

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Reposted by Lukas Brunner

ESRAH University of Hamburg @esrah.uni-hamburg.de · 10/09/2026

🌇 How different is today's temperature in your hometown from what used to be normal? The new @reuters.com #Climate Monitor lets you check for any place, updated daily. Developed with climate experts, including our #CLICCS researcher @lukasbrunner.bsky.social. Check it out: lnkd.in/efct6nWq

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Lukas Brunner @lukasbrunner.bsky.social · 03/08/2026

Neuer Hitzerekord in Wien mit über 40°C und mehr als 10°C über den durchschnittlichen Temperaturen für diese Jahreszeit 🥵 Artikel von @derstandard.at Historischer Vergleich von @reuters.com

Screenshot der Startseite von "Der Standard": Ein Foto zeigt eine ausgetrocknete, vertrocknete Wiese mit Bäumen im Hintergrund. Die Schlagzeile lautet "Neuer Hitzerekord: Erstmals 40,1 Grad in Wien", mit Hinweis auf extreme Hitze auch an den Folgetagen und der höchsten Wetterwarnstufe im Osten Österreichs. Darunter folgen Kacheln mit weiteren Nachrichten.

Screenshot eines Reuters-Klimamonitors: Eine orange eingefärbte Karte Österreichs zeigt Wien mit einer heutigen Höchsttemperatur von 36°C, 10,9 Grad über dem historischen Durchschnitt. Ein Diagramm daneben zeigt den Temperaturverlauf 2026 (orange) durchgehend über dem historischen Mittel (schwarz) von Januar bis August. Unten eine Farbskala von -5° bis +5° zur Einordnung der Abweichung.

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Reposted by Lukas Brunner

Infopoint #Klimawandel #Artensterben @infopointa.bsky.social · 02/08/2026

"Es ist halt Sommer" 🙃 Schönes Tool, schaut mal rein Wie die heutigen Temperaturen im Vergleich zum historischen Durchschnitt ausfallen Reuters Climate Monitor www.reuters.com/graphics/CLI...

Screenshot Reuters Climate Monitor
Temperaturabweichung 02.08.2026 gegenüber 1961-1990
München +6,9°C
Link: https://www.reuters.com/graphics/CLIMATE-AUTOMATED/MONITOR/akpeykqqapr/?lat=48.137&lng=11.576&zoom=6&place=Munich

Screenshot Reuters Climate Monitor
Temperaturabweichung 02.08.2026 gegenüber 1961-1990
Brüssel +8.0C
Link: https://www.reuters.com/graphics/CLIMATE-AUTOMATED/MONITOR/akpeykqqapr/?lat=50.8551&lng=4.3512&zoom=6&place=Brussels

Screenshot Reuters Climate Monitor
Temperaturabweichung 02.08.2026 gegenüber 1961-1990
London +6,8°C
https://www.reuters.com/graphics/CLIMATE-AUTOMATED/MONITOR/akpeykqqapr/?lat=51.5073&lng=-0.1276&zoom=6&place=London

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Lukas Brunner @lukasbrunner.bsky.social · 02/08/2026

@reuters.com has a new tool to compare today's weather in a climate context. Pretty cool to play around with and pretty sobering at the same time 🥵 www.reuters.com/graphics/CLI...

reuters.com

Reuters Climate Monitor

How today's temperatures compare to the historic average

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Reposted by Lukas Brunner

Thomas Rackow 🧊 @trackow.bsky.social · 27/05/2026

Great to see the km-scale models perform well in Lukas' comparison! We bring the same models into an operational framework @ec.europa.eu, with a resolution of 5km. To get started with the latest generation, please look at platform.destine.eu/climate-dt/ @ecmwf.int @esa.int @eumetsat.int

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Reposted by Lukas Brunner

Gavin Schmidt @climateofgavin.bsky.social · 22/05/2026

This is a quick summary of the latest CMIP process. It is a complex beast and a consensus project so there are always things that you’ll agree with and those that you might not. 1/

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Reposted by Lukas Brunner

Thomas Rackow 🧊 @trackow.bsky.social · 19/05/2026

Happy to see the new #DestinE simulations out in the open! I’d strongly recommend trying the new Jupyter example notebooks, including lazy browsing: github.com/destination-... Looking forward to seeing what people will build and discover with this next generation of #ClimateDT simulations!

github.com

polytope-examples/climate-dt at main · destination-earth-digital-twins/polytope-examples

This repository describes the process for accessing Destination Earth DT data via the Polytope web service hosted on the LUMI Databridge. - destination-earth-digital-twins/polytope-examples

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Reposted by Lukas Brunner

Lukas Brunner @lukasbrunner.bsky.social · 08/05/2026

If you are like me and prefer to read the typeset version of papers, here you go: the final version is out fresh from the print 😊 www.nature.com/articles/s43...

Screenshot of the title page of the article entitled: Three decades of simulating global temperature patterns with coupled global climate models

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Lukas Brunner @lukasbrunner.bsky.social · 08/05/2026

If you are like me and prefer to read the typeset version of papers, here you go: the final version is out fresh from the print 😊 www.nature.com/articles/s43...

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Reposted by Lukas Brunner

Lukas Brunner @lukasbrunner.bsky.social · 21/04/2026

🚨 New paper: Three decades of simulating global temperature patterns with coupled global climate models 💡 Some of the latest km-scale models perform similarly to obs 💡 Reference choice starts to dominate for the latest models 💡 Resolution matters but is not everything www.nature.com/articles/s43...

nature.com

Three decades of simulating global temperature patterns with coupled global climate models - Communications Earth & Environment

Increasing spatial resolution of climate models has the potential to improve the performance of simulating global surface temperature patterns, based on comparisons between kilometer-scale models, est...

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Lukas Brunner @lukasbrunner.bsky.social · 23/04/2026

Modern climate models are more accurate than ever : Newsroom : University of Hamburg share.google/SQofonppS6Nl...

share.google

Modern climate models are more accurate than ever

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Lukas Brunner @lukasbrunner.bsky.social · 22/04/2026

This figure from the supplement of our new paper (see quoted post for details) shows a quite interesting side-result that reverses traditional model evaluation: We investigate which observation-based dataset is closest to how many models and find systematic changes over model generations.

$Fraction of models closest to each reference. Shown is the fraction of models for which each reference dataset (shown on the x-axis) leads to the lowest RMSD.$

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Reposted by Lukas Brunner

ESRAH University of Hamburg @esrah.uni-hamburg.de · 21/04/2026

🌡️ How good are #climate models, really? A new study by @lukasbrunner.bsky.social at #CLICCS @uni-hamburg.de examined 176 climate models from 30 years – and shows: the latest models come so close to reality that the measurement data, not the models, are now the limiting factor. 🧪 shorturl.at/j1kbs

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Reposted by Lukas Brunner

Universität Hamburg @uni-hamburg.de · 21/04/2026

Wie heiß wird es in der Sahara, wie kalt in der Antarktis? 🌡️ Klimamodelle berechnen die Temperatur-Landkarte der Erde. Aber wie gut sind diese? Eine Studie von Dr. @lukasbrunner.bsky.social zeigt: Im Schnitt sind die Temperatur-Landkarten der Klimamodelle deutlich genauer und zuverlässiger geworden.

uni-hamburg.de

Moderne Klimamodelle sind so genau wie noch nie

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Lukas Brunner @lukasbrunner.bsky.social · 21/04/2026

Hier geht's zur Pressemitteilung der @uni-hamburg.de über unser gerade erschienenes Papier zum Vergleich von globalen Klimamodellen in den letzten 3 Jahrzehnten. 🧑‍🎓 www.uni-hamburg.de/newsroom/pre...

uni-hamburg.de

Moderne Klimamodelle sind so genau wie noch nie

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Lukas Brunner @lukasbrunner.bsky.social · 21/04/2026

nature.com

Three decades of simulating global temperature patterns with coupled global climate models - Communications Earth & Environment

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Lukas Brunner @lukasbrunner.bsky.social · 28/10/2025

Letzte Woche durfte ich im Rahmen der Ringvorlesung zur Klimakrise der @uni-hamburg.de einen Vortrag zu den naturwissenschaftlichen Grundlagen der Klimakrise geben. Vielen Dank fürs Dabeisein und für die spannenden Fragen! Zum Nachschauen 👇 youtu.be/IuTXbtR1fFw #SystemChangeNotClimateChange

youtu.be

Naturwissenschaftliche Grundlagen der Klimakrise - Lukas Brunner | Fridays for Future

YouTube video by Fridays for Future DE

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Lukas Brunner @lukasbrunner.bsky.social · 17/10/2025

Am kommenden Dienstag gebe ich im Rahmen der Ringvorlesung zur Klimakrise an der @uni-hamburg.de einen Vortrag zu den physikalischen Grundlagen der Klimakrise. Der Vortrag ist öffentlich, also gerne vorbeikommen! Freue mich auf den Austausch! #climatecomms www.zfw.uni-hamburg.de/oeffentliche...

zfw.uni-hamburg.de

Physikalischen Grundlagen

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Lukas Brunner @lukasbrunner.bsky.social · 02/09/2025

Comparing global km-scale climate models to the resolution of coarser CMIP6 models. The video shows precipitation flux and accumulated precipitation for 2025, ending with a quantification of the difference in resolutions. Animation: Michael Böttinger (DKRZ) Method & paper: bsky.app/profile/luka...

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Lukas Brunner @lukasbrunner.bsky.social · 19/08/2025

Here's also my thread on the main findings: /profile/lukasbrunner.bsky.social/post/3lrsdhwkev22y

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Lukas Brunner @lukasbrunner.bsky.social · 18/08/2025

Amazing visualization of our recent sub-grid variability work by Michael Böttinger (DKRZ) 🤩. It shows the local detail in global precipitation resolved by km-scale models. From 0:50 in direct comparison to CMIP6-type 100km. From 2:07 the sub-grid variability is shown. 🤓🧪 youtu.be/fzA92tSF4ZM?...

youtu.be

The spatial representation of precipitation - a comparison between km-scale and CMIP-type model data

YouTube video by Deutsches Klimarechenzentrum

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Lukas Brunner @lukasbrunner.bsky.social · 03/08/2025

Local downpour near Oberstdorf, Germany ⛰️

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Lukas Brunner @lukasbrunner.bsky.social · 28/07/2025

Vor einigen Wochen durfte ich im Rahmen des Formats Vorlesung für Alle der @uni-hamburg.de einen Vortrag zu Temperaturextremen geben. Die Aufzeichnung ist jetzt auf YouTube 👇 Danke für die Einladung und das Interesse! youtu.be/0KGi4Y6J2Ls?...

youtu.be

Vorlesung für alle - Wie ändern sich Wetterextreme mit dem Klimawandel?

YouTube video by Universität Hamburg

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Reposted by Lukas Brunner

Lukas Brunner @lukasbrunner.bsky.social · 17/06/2025

New paper in ERL! We study the importance of resolution for the representation of climate extremes. We use a new generation of km-scale models to show that many important details about temperature and precipitation extremes are hidden at CMIP6-like resolutions. doi.org/10.1088/1748...

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Reposted by Lukas Brunner

Katharine Hayhoe @katharinehayhoe.com · 21/06/2025

Today is #ShowYourStripes Day! Created by @edhawkins.org, the warming stripes show temperature each year: blue for cool, white for avg, red for hot. Athletes are wearing them, knitters are knitting them, and cities are putting them on trams. Find + share your "stripes" here: showyourstripes.info

Text reading "start a climate conversation" superimposed over the global warming stripes.

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Lukas Brunner @lukasbrunner.bsky.social · 21/06/2025

Annually the impact of climate change is pretty clear even locally. And even on a daily basis the signal starts to emerge! For regular updates on daily Hamburg temperatures in a long term context, check out my bot @weather-climate.bsky.social (still 🚧) 2025 so far: bsky.app/profile/weat...

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Lukas Brunner @lukasbrunner.bsky.social · 21/06/2025

Temperature anomaly relative to 1951-2010 in Hamburg, Germany #ShowYourStripes day #SystemChangeNotClimateChange

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Reposted by Lukas Brunner

Sarah Perkins-Kirkpatrick @sarahinscience.bsky.social · 20/06/2025

The first 3 eps of TOTALLY COOKED have landed! Check it out for weather & climate in a factual, relatable & often humorous way. Available below, & where you get your podcasts. Like, follow & share. Let's tackle the climate crisis together. #totallycooked www.21centuryweather.org.au/engage/total...

21centuryweather.org.au

Totally Cooked: The Weather & Climate Podcast

The climate is changing. So is the conversation. Totally Cooked is a podcast about weather, climate change, and what it all means for life on Earth.

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Lukas Brunner @lukasbrunner.bsky.social · 18/06/2025

@cenunihh.bsky.social climate visualization lab has created this nice animation of the resolution effect on climate extremes! 🤩 Comparison of CMIP6-like 100km and the new 10km for the example of TXx (hottest day in the year). Details in the paper: doi.org/10.1088/1748... youtu.be/R5laSSVHUAk?...

youtu.be

Next generation global models reveal new spatial details of temperature extremes

YouTube video by CEN Climate Visualization Laboratory

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Reposted by Lukas Brunner

ESRAH University of Hamburg @esrah.uni-hamburg.de · 18/06/2025

Resolution matters: Extreme temperatures in e.g. Indian cities can be underestimated by up to 10°C, a paper by @lukasbrunner.bsky.social‬ shows. High-res climate models (<10 km) reveal that important details about extremes are hidden at lower resolutions. iopscience.iop.org/article/10.1...

Portrait of climate researcher Lukas Brunner, including his quote: “Resolution is important for climate extremes! Peak temperatures can be up to 10°C higher in next-generation climate models just due to their finer resolution.
These findings are particularly important for robust risk assessments.”
Photo: L. Brunner

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Lukas Brunner @lukasbrunner.bsky.social · 17/06/2025

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Laura Suarez-Gutierrez @drlaurasuarez.bsky.social · 27/04/2025

#EGU25 is about to start! If you're there, check out our session on High-impact Climate Extremes on Tuesday, room 🟨 F1 🧪: meetingorganizer.copernicus.org/EGU25/sessio... With many exciting talks, including the CL Division Outstanding ECS Award Lecture by @kornhuber.bsky.social

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Lukas Brunner @lukasbrunner.bsky.social · 25/04/2025

Great workshop on atmospheric temperature changes by @wcrpclimate.bsky.social in Graz! Thanks for including me in this interesting and insightful exchange!

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Reposted by Lukas Brunner

Lukas Brunner @lukasbrunner.bsky.social · 04/04/2025

Let me very warmly recommend putting our Up-Goer Five session into your EGU25 calendar! I mean, just have a look at these amazing abstract titles (using only the 1000 most used English words). I can guarantee that this will be an extremely informative and fun session! 🤓🧑‍🎓 #EGU25 @egu.eu

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Lukas Brunner @lukasbrunner.bsky.social · 08/04/2025

Join us on Friday during #EGU25 for an interesting session on New developments in Earth system modelling! We will cover various topics from advances in modelling to model evaluation. We are also honored to have Shuting Yang as a solicited speaker! 👇 meetingorganizer.copernicus.org/EGU25/sessio...

https://meetingorganizer.copernicus.org/EGU25/session/52390

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Reposted by Lukas Brunner

Mariana Madruga de Brito @mdebrito.bsky.social · 04/04/2025

This is genius! so creative and also important for how we communicate our science

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Vikki Thompson @vikkithompson.bsky.social · 04/04/2025

Super excited to be presenting our ensemble boosting work, 'Imagine rain falling in a different place', in this session:

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Lukas Brunner @lukasbrunner.bsky.social · 04/04/2025

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Lukas Brunner @lukasbrunner.bsky.social · 17/03/2025

In 2025 so far almost 20% of days in Hamburg have been warmer than the 90th percentile of the 1940-2024 climatology. More than 60% have been warmer than the mean.

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Lukas Brunner @lukasbrunner.bsky.social · 05/03/2025

Apply for a scholarship for the European Forum Alpbach! Great opportunity for interesting discussions beyond topical silos. 🗣️🌎 There are several options for scholarships, if you are connected to Vorarlberg consider applying here: www.club-alpbach-vorarlberg.at/bewerbungspr...

club-alpbach-vorarlberg.at

Bewerbungsprozess – Club Alpbach Vorarlberg

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Klimadashboard @klimadashboard.org · 18/02/2025

Zum dreijährigen Geburtstag haben wir Klimadashboard.at und Klimadashboard.de neu gestaltet und mit vielen neuen Features ausgestattet: 💥 neues Design 📬 aktuelle Klimaberichterstattung 🇬🇧 english translations 🌚 dark mode 🚀 ...und vieles mehr!

klimadashboard.at

Startseite | Klimadashboard Österreich

Wissenschaftsbasiert. Transparent. Unabhängig.Bekannt aus DER STANDARD, ORF, APA, Stern.de.

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Lukas Brunner @lukasbrunner.bsky.social · 12/01/2025

Klima ist was wir erwarten, Wetter ist was passiert. Aber der Klimawandel verändert immer weiter was wirklich passiert selbst lokal. Die tägliche Temperatur in Hamburg 2024 ist zwar sehr variabel aber klar zu warm wenn wir sie mit der Verteilung 1940-2023 vergleichen.

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Lukas Brunner @lukasbrunner.bsky.social · 12/01/2025

The 2024 climate summary reports are out and records are falling left and right. I'm adding this as I haven't seen it anywhere else: globally all days were warmer than the 90th percentile of the 1940-2023 distribution and more than half set a new record compared to the same day in previous years. 🥵

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Lukas Brunner @lukasbrunner.bsky.social · 08/01/2025

The #EGU25 abstract deadline is approaching (Wednesday January 15th 1pm CET). If you are still looking for a session and work on evaluating climate models and/or observational constraints for their future projections, check out our session here: meetingorganizer.copernicus.org/EGU25/sessio...

meetingorganizer.copernicus.org

Session CL5.16

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