Erich Fischer
@erichfischer.bsky.social
Climate scientist investigating weather and climate extremes, professor at ETH Zurich (@ethzurich.bsky.social), fascinated by weather and climate, IPCC AR6 lead author
Reposted by Erich Fischer
Climate skeptics have long been obsessed with corrections to temperature records for changes in measurement techniques and instruments over time.
But it turns out that if we just used the raw data we'd see more warming. My latest at The Climate Brink: www.theclimatebrink....
But it turns out that if we just used the raw data we'd see more warming. My latest at The Climate Brink: www.theclimatebrink....
September 8, 2025 at 5:43 PM
Climate skeptics have long been obsessed with corrections to temperature records for changes in measurement techniques and instruments over time.
But it turns out that if we just used the raw data we'd see more warming. My latest at The Climate Brink: www.theclimatebrink....
But it turns out that if we just used the raw data we'd see more warming. My latest at The Climate Brink: www.theclimatebrink....
Reposted by Erich Fischer
A bit farther ahead, it's increasingly looking like a rather extreme late-season ridge & heatwave event may develop over Pacific NW & British Columbia in about a week--with some degree of anomalous warmth extending across most of the West (including California). #CAwx #ORwx #WAwx
August 27, 2025 at 10:36 PM
Numerical weather prediction models (ECMWF IFS) still outperform AI weather models in forecasting record-breaking hot and cold extremes and unseen wind extremes
Preprint
arxiv.org/abs/2508.15724
with Zhongwei Zhang @erichfischer.bsky.social @zscheischlerjak.bsky.social and Sebastian Engelke
Preprint
arxiv.org/abs/2508.15724
with Zhongwei Zhang @erichfischer.bsky.social @zscheischlerjak.bsky.social and Sebastian Engelke
Numerical models outperform AI weather forecasts of record-breaking extremes
Artificial intelligence (AI)-based models are revolutionizing weather forecasting and have surpassed leading numerical weather prediction systems on various benchmark tasks. However, their ability to ...
arxiv.org
August 22, 2025 at 5:43 AM
Numerical weather prediction models (ECMWF IFS) still outperform AI weather models in forecasting record-breaking hot and cold extremes and unseen wind extremes
Preprint
arxiv.org/abs/2508.15724
with Zhongwei Zhang @erichfischer.bsky.social @zscheischlerjak.bsky.social and Sebastian Engelke
Preprint
arxiv.org/abs/2508.15724
with Zhongwei Zhang @erichfischer.bsky.social @zscheischlerjak.bsky.social and Sebastian Engelke
Wetterextreme und Sommer 2025
Ich war gestern Gast im SRF Tagesgespräch bei Karoline Arn. Ich habe die Wetterereignisse des Sommers 2025 eingeordnet und über unsere laufende Forschung am @usyseth.bsky.social
der @ethz.ch gesprochen.
www.srf.ch/audio/tagesg...
Ich war gestern Gast im SRF Tagesgespräch bei Karoline Arn. Ich habe die Wetterereignisse des Sommers 2025 eingeordnet und über unsere laufende Forschung am @usyseth.bsky.social
der @ethz.ch gesprochen.
www.srf.ch/audio/tagesg...
Erich Fischer: «Hitzewellen von fünf Wochen sind möglich»
Wie heiss kann es in der Schweiz maximal werden? Der Klimatologe Erich Fischer forscht zu Klima- und Wetterextremen an der ETH Zürich, auch zu Maximaltemperaturen in der Schweiz. Nun liegen belastbare...
www.srf.ch
August 19, 2025 at 10:04 AM
Wetterextreme und Sommer 2025
Ich war gestern Gast im SRF Tagesgespräch bei Karoline Arn. Ich habe die Wetterereignisse des Sommers 2025 eingeordnet und über unsere laufende Forschung am @usyseth.bsky.social
der @ethz.ch gesprochen.
www.srf.ch/audio/tagesg...
Ich war gestern Gast im SRF Tagesgespräch bei Karoline Arn. Ich habe die Wetterereignisse des Sommers 2025 eingeordnet und über unsere laufende Forschung am @usyseth.bsky.social
der @ethz.ch gesprochen.
www.srf.ch/audio/tagesg...
Honoured to be appointed Lead Author of IPCC #AR7 for the chapter 7 on "Projections of regional climate and extremes".
I am looking forward to contribute together with my @usyseth.bsky.social colleague @lukasgudmundsson.bsky.social
and IPCC WG1 vice-chair @soniaseneviratne.bsky.social
I am looking forward to contribute together with my @usyseth.bsky.social colleague @lukasgudmundsson.bsky.social
and IPCC WG1 vice-chair @soniaseneviratne.bsky.social
The #IPCC has announced the authors selected for its Seventh Assessment Report.
664 experts from 111 countries have been invited to participate as Coordinating Lead Authors, Lead Authors, & Review Editors.
🌍 51% from developing countries
🚺 46% women
🔗 bit.ly/AR7AuthorsPR
664 experts from 111 countries have been invited to participate as Coordinating Lead Authors, Lead Authors, & Review Editors.
🌍 51% from developing countries
🚺 46% women
🔗 bit.ly/AR7AuthorsPR
August 18, 2025 at 3:19 PM
Honoured to be appointed Lead Author of IPCC #AR7 for the chapter 7 on "Projections of regional climate and extremes".
I am looking forward to contribute together with my @usyseth.bsky.social colleague @lukasgudmundsson.bsky.social
and IPCC WG1 vice-chair @soniaseneviratne.bsky.social
I am looking forward to contribute together with my @usyseth.bsky.social colleague @lukasgudmundsson.bsky.social
and IPCC WG1 vice-chair @soniaseneviratne.bsky.social
Reposted by Erich Fischer
📣 New paper:
💧💧💧 In July 2021 record breaking rainfall hit western Europe, we use ensemble boosting to explore different plausible storylines. These show it could have rained for longer, or over a larger area, or in a different place. Are we prepared?
doi.org/10.1038/s432...
💧💧💧 In July 2021 record breaking rainfall hit western Europe, we use ensemble boosting to explore different plausible storylines. These show it could have rained for longer, or over a larger area, or in a different place. Are we prepared?
doi.org/10.1038/s432...
July 8, 2025 at 10:06 AM
📣 New paper:
💧💧💧 In July 2021 record breaking rainfall hit western Europe, we use ensemble boosting to explore different plausible storylines. These show it could have rained for longer, or over a larger area, or in a different place. Are we prepared?
doi.org/10.1038/s432...
💧💧💧 In July 2021 record breaking rainfall hit western Europe, we use ensemble boosting to explore different plausible storylines. These show it could have rained for longer, or over a larger area, or in a different place. Are we prepared?
doi.org/10.1038/s432...
Reposted by Erich Fischer
🌧️The July 2021 extreme rainfall in Western Europe was near the upper bound of plausibility in the current climate, though alternative storylines reveal more severe potential outcomes.
@vikkithompson.bsky.social @hancloke.bsky.social @erichfischer.bsky.social
👉
www.nature.com/articles/s43...
@vikkithompson.bsky.social @hancloke.bsky.social @erichfischer.bsky.social
👉
www.nature.com/articles/s43...
Alternative rainfall storylines for the Western European July 2021 floods from ensemble boosting - Communications Earth & Environment
The July 2021 extreme rainfall event in Western Europe appears near the upper bound of plausibility in the current climate, though alternative storylines revealing the potential for even more severe o...
www.nature.com
July 8, 2025 at 3:32 PM
🌧️The July 2021 extreme rainfall in Western Europe was near the upper bound of plausibility in the current climate, though alternative storylines reveal more severe potential outcomes.
@vikkithompson.bsky.social @hancloke.bsky.social @erichfischer.bsky.social
👉
www.nature.com/articles/s43...
@vikkithompson.bsky.social @hancloke.bsky.social @erichfischer.bsky.social
👉
www.nature.com/articles/s43...
Schon 34.5°C um 13:40 in Basel! Ohne Gewitter dürfte es ein sehr warmes Eröffnungsspiel der Schweiz an der #WEURO2025 werden.
July 2, 2025 at 12:03 PM
Schon 34.5°C um 13:40 in Basel! Ohne Gewitter dürfte es ein sehr warmes Eröffnungsspiel der Schweiz an der #WEURO2025 werden.
Reposted by Erich Fischer
In about 4 days from now, we are going to hit the #Glacier Loss Day in Switzerland! All melting from this point onwards till next winter is unsustainable, i.e. is long-term mass loss.
This is extremely early in the season! And just a bit behind the record-shattering year 2022...
This is extremely early in the season! And just a bit behind the record-shattering year 2022...
June 30, 2025 at 3:18 PM
In about 4 days from now, we are going to hit the #Glacier Loss Day in Switzerland! All melting from this point onwards till next winter is unsustainable, i.e. is long-term mass loss.
This is extremely early in the season! And just a bit behind the record-shattering year 2022...
This is extremely early in the season! And just a bit behind the record-shattering year 2022...
Viermal mehr Hitzerekorde als ohne Klimawandel
Eigentlich gilt: Je länger die Messreihen, desto seltener neue Rekorde.
Doch das Gegenteil ist der Fall – wie wir in unserem Reviewartikel in Nature Reviews Earth & Environment zeigen.
Blog: www.carbonbrief.org/guest-post-h...
Paper: rdcu.be/et273
Eigentlich gilt: Je länger die Messreihen, desto seltener neue Rekorde.
Doch das Gegenteil ist der Fall – wie wir in unserem Reviewartikel in Nature Reviews Earth & Environment zeigen.
Blog: www.carbonbrief.org/guest-post-h...
Paper: rdcu.be/et273
Guest post: How climate change is fuelling record-breaking extreme weather - Carbon Brief
Recent years have seen a rapid succession of climate-related records broken.
www.carbonbrief.org
June 30, 2025 at 5:40 AM
Viermal mehr Hitzerekorde als ohne Klimawandel
Eigentlich gilt: Je länger die Messreihen, desto seltener neue Rekorde.
Doch das Gegenteil ist der Fall – wie wir in unserem Reviewartikel in Nature Reviews Earth & Environment zeigen.
Blog: www.carbonbrief.org/guest-post-h...
Paper: rdcu.be/et273
Eigentlich gilt: Je länger die Messreihen, desto seltener neue Rekorde.
Doch das Gegenteil ist der Fall – wie wir in unserem Reviewartikel in Nature Reviews Earth & Environment zeigen.
Blog: www.carbonbrief.org/guest-post-h...
Paper: rdcu.be/et273
Reposted by Erich Fischer
🔥 Hitzewellen werden häufiger & intensiver – und belasten die Gesundheit, Landwirtschaft & Infrastruktur.
Besonders gefährdet: ältere & verletzliche Menschen.
💧 Auch Trockenheit & Wassermangel nehmen zu.
Die CH muss sich anpassen.
👉https://dieumwelt.ch/artikel/klimarisiken-in-der-schweiz
Besonders gefährdet: ältere & verletzliche Menschen.
💧 Auch Trockenheit & Wassermangel nehmen zu.
Die CH muss sich anpassen.
👉https://dieumwelt.ch/artikel/klimarisiken-in-der-schweiz
June 19, 2025 at 11:19 AM
🔥 Hitzewellen werden häufiger & intensiver – und belasten die Gesundheit, Landwirtschaft & Infrastruktur.
Besonders gefährdet: ältere & verletzliche Menschen.
💧 Auch Trockenheit & Wassermangel nehmen zu.
Die CH muss sich anpassen.
👉https://dieumwelt.ch/artikel/klimarisiken-in-der-schweiz
Besonders gefährdet: ältere & verletzliche Menschen.
💧 Auch Trockenheit & Wassermangel nehmen zu.
Die CH muss sich anpassen.
👉https://dieumwelt.ch/artikel/klimarisiken-in-der-schweiz
Reposted by Erich Fischer
Die gegenwärtige #Hitze führt zu zunehmendem Temperaturstress für #Fische in #Schweizer #Fliessgewässern, insbesondere in der Thur, Goldach, Broye und Tresa. Mehr auf www.drought.ch/de/impakt-vo... des Projektes #MaLeFix der @wslresearch.bsky.social. @hydrologywsl.bsky.social @eawag.bsky.social
June 23, 2025 at 5:37 AM
Die gegenwärtige #Hitze führt zu zunehmendem Temperaturstress für #Fische in #Schweizer #Fliessgewässern, insbesondere in der Thur, Goldach, Broye und Tresa. Mehr auf www.drought.ch/de/impakt-vo... des Projektes #MaLeFix der @wslresearch.bsky.social. @hydrologywsl.bsky.social @eawag.bsky.social
Reposted by Erich Fischer
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...
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...
June 17, 2025 at 10:56 AM
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...
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...
High warming rate fuels record-breaking weather
The longer our measurements, the fewer record-breaking events we should observe.
The opposite is the case - many more records and higher record margins
I summarise the key takeaways of our @natrevearthenviron.nature.com article in a guest post.
The longer our measurements, the fewer record-breaking events we should observe.
The opposite is the case - many more records and higher record margins
I summarise the key takeaways of our @natrevearthenviron.nature.com article in a guest post.
NEW – Guest post: How climate change is fuelling record-breaking extreme weather | @erichfischer.bsky.social
Read here: buff.ly/bnrSvQN
Read here: buff.ly/bnrSvQN
June 13, 2025 at 10:40 AM
High warming rate fuels record-breaking weather
The longer our measurements, the fewer record-breaking events we should observe.
The opposite is the case - many more records and higher record margins
I summarise the key takeaways of our @natrevearthenviron.nature.com article in a guest post.
The longer our measurements, the fewer record-breaking events we should observe.
The opposite is the case - many more records and higher record margins
I summarise the key takeaways of our @natrevearthenviron.nature.com article in a guest post.
Reposted by Erich Fischer
NEW – Guest post: How climate change is fuelling record-breaking extreme weather | @erichfischer.bsky.social
Read here: buff.ly/bnrSvQN
Read here: buff.ly/bnrSvQN
June 13, 2025 at 10:00 AM
NEW – Guest post: How climate change is fuelling record-breaking extreme weather | @erichfischer.bsky.social
Read here: buff.ly/bnrSvQN
Read here: buff.ly/bnrSvQN
Reposted by Erich Fischer
Happy to share our paper in @science.org 'Observed trend in Earth energy imbalance may provide a constraint for low climate sensitivity models' | Science www.science.org/doi/10.1126/...
Observed trend in Earth energy imbalance may provide a constraint for low climate sensitivity models
Climate forcings by greenhouse gases and aerosols cause an imbalance at the top of the atmosphere between the net incoming solar radiation and outgoing longwave radiation from Earth. This Earth energy...
www.science.org
June 12, 2025 at 6:15 PM
Happy to share our paper in @science.org 'Observed trend in Earth energy imbalance may provide a constraint for low climate sensitivity models' | Science www.science.org/doi/10.1126/...
Reposted by Erich Fischer
⚒️ Article: Flash droughts that are accompanied by extreme heat drive more severe and prolonged impacts on global ecosystems
@erichfischer.bsky.social @ethz.ch @louiseslater.bsky.social @sebastian-sippel.bsky.social @retoknutti.bsky.social
www.nature.com/articles/s41...
@erichfischer.bsky.social @ethz.ch @louiseslater.bsky.social @sebastian-sippel.bsky.social @retoknutti.bsky.social
www.nature.com/articles/s41...
June 2, 2025 at 3:00 PM
⚒️ Article: Flash droughts that are accompanied by extreme heat drive more severe and prolonged impacts on global ecosystems
@erichfischer.bsky.social @ethz.ch @louiseslater.bsky.social @sebastian-sippel.bsky.social @retoknutti.bsky.social
www.nature.com/articles/s41...
@erichfischer.bsky.social @ethz.ch @louiseslater.bsky.social @sebastian-sippel.bsky.social @retoknutti.bsky.social
www.nature.com/articles/s41...
Reposted by Erich Fischer
Will you live an unprecedented life?
In our new paper in @nature.com and accompanying @savethechildren.org report, we detect who will face unprecedented lifetime exposure to climate extremes (🧵) 1/n
Report: resourcecentre.savethechildren.net/document/bor...
Paper: www.nature.com/articles/s41...
In our new paper in @nature.com and accompanying @savethechildren.org report, we detect who will face unprecedented lifetime exposure to climate extremes (🧵) 1/n
Report: resourcecentre.savethechildren.net/document/bor...
Paper: www.nature.com/articles/s41...
Born into the Climate Crisis 2. An unprecedented life: Protecting children’s rights in a changing climate | Save the Children’s Resource Centre
The climate crisis is not a distant threat; it is a pressing reality that children are facing today. Despite having contributed the least to the climate crisis, the inherent intergenerational injustic...
resourcecentre.savethechildren.net
May 12, 2025 at 10:54 AM
Will you live an unprecedented life?
In our new paper in @nature.com and accompanying @savethechildren.org report, we detect who will face unprecedented lifetime exposure to climate extremes (🧵) 1/n
Report: resourcecentre.savethechildren.net/document/bor...
Paper: www.nature.com/articles/s41...
In our new paper in @nature.com and accompanying @savethechildren.org report, we detect who will face unprecedented lifetime exposure to climate extremes (🧵) 1/n
Report: resourcecentre.savethechildren.net/document/bor...
Paper: www.nature.com/articles/s41...
Our children will face unprecedented exposure to weather extremes.
Our paper led by Luke Grant and @wimthiery.bsky.social published in @nature.com shows that the generation of our children and grandchildren will be exposed to a lot more weather extremes than ours.
www.nature.com/articles/s41...
Our paper led by Luke Grant and @wimthiery.bsky.social published in @nature.com shows that the generation of our children and grandchildren will be exposed to a lot more weather extremes than ours.
www.nature.com/articles/s41...
May 7, 2025 at 3:47 PM
Our children will face unprecedented exposure to weather extremes.
Our paper led by Luke Grant and @wimthiery.bsky.social published in @nature.com shows that the generation of our children and grandchildren will be exposed to a lot more weather extremes than ours.
www.nature.com/articles/s41...
Our paper led by Luke Grant and @wimthiery.bsky.social published in @nature.com shows that the generation of our children and grandchildren will be exposed to a lot more weather extremes than ours.
www.nature.com/articles/s41...
Reposted by Erich Fischer
or in the Carbon Brief article: www.carbonbrief.org/children-bor...
Grateful and proud to have contributed to this important study, led by Luke Grant and @wimthiery.bsky.social , with @soniaseneviratne.bsky.social and @erichfischer.bsky.social
Grateful and proud to have contributed to this important study, led by Luke Grant and @wimthiery.bsky.social , with @soniaseneviratne.bsky.social and @erichfischer.bsky.social
Children born in 2020 will face ‘unprecedented exposure’ to climate extremes - Carbon Brief
Children born in 2020 will face “unprecedented exposure” to extreme weather events even if warming is limited to 1.5C.
www.carbonbrief.org
May 7, 2025 at 3:30 PM
or in the Carbon Brief article: www.carbonbrief.org/children-bor...
Grateful and proud to have contributed to this important study, led by Luke Grant and @wimthiery.bsky.social , with @soniaseneviratne.bsky.social and @erichfischer.bsky.social
Grateful and proud to have contributed to this important study, led by Luke Grant and @wimthiery.bsky.social , with @soniaseneviratne.bsky.social and @erichfischer.bsky.social
Reposted by Erich Fischer
📢 Hot off the press: our new study in Nature, led by Luke Grant and @wimthiery.bsky.social, shows how climate change is redefining what it means to live an "unprecedented life"—facing climate extremes that would have been nearly impossible without human influence.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Global emergence of unprecedented lifetime exposure to climate extremes - Nature
Climate models, impact models and demographic data are used to estimate the number of people projected to experience unprecedented lifetime exposure to extreme climate events across multiple dimension...
www.nature.com
May 7, 2025 at 3:30 PM
📢 Hot off the press: our new study in Nature, led by Luke Grant and @wimthiery.bsky.social, shows how climate change is redefining what it means to live an "unprecedented life"—facing climate extremes that would have been nearly impossible without human influence.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Erich Fischer
🚨 Research by VUB and ETH Zurich shows millions of children will suffer most from heatwaves, crop failures, floods, fires and storms due to climate change. We must act now to protect their future!
➡️ go.ethz.ch/2i
➡️ go.ethz.ch/2i
Climate change: Children suffer the most
Millions of children will be affected in unprecedented ways by heat waves, crop failures, river flooding, droughts, forest fires and tropical storms during their lifetime under current climate policy ...
go.ethz.ch
May 7, 2025 at 3:11 PM
🚨 Research by VUB and ETH Zurich shows millions of children will suffer most from heatwaves, crop failures, floods, fires and storms due to climate change. We must act now to protect their future!
➡️ go.ethz.ch/2i
➡️ go.ethz.ch/2i
@wimthiery.bsky.social presenting our new paper "Global emergence of unprecedented lifetime
exposure to climate extremes" at #EGU25. Stay tuned for the paper led by Luke Grant, @innevanderkelen.bsky.social, @soniaseneviratne.bsky.social, @lukasgudmundsson.bsky.social published on 8 May.
exposure to climate extremes" at #EGU25. Stay tuned for the paper led by Luke Grant, @innevanderkelen.bsky.social, @soniaseneviratne.bsky.social, @lukasgudmundsson.bsky.social published on 8 May.
May 1, 2025 at 1:34 PM
@wimthiery.bsky.social presenting our new paper "Global emergence of unprecedented lifetime
exposure to climate extremes" at #EGU25. Stay tuned for the paper led by Luke Grant, @innevanderkelen.bsky.social, @soniaseneviratne.bsky.social, @lukasgudmundsson.bsky.social published on 8 May.
exposure to climate extremes" at #EGU25. Stay tuned for the paper led by Luke Grant, @innevanderkelen.bsky.social, @soniaseneviratne.bsky.social, @lukasgudmundsson.bsky.social published on 8 May.
Reposted by Erich Fischer
#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
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
April 27, 2025 at 12:05 PM
#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
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
Reposted by Erich Fischer
Super excited to be presenting our ensemble boosting work, 'Imagine rain falling in a different place', in this session:
April 4, 2025 at 12:05 PM
Super excited to be presenting our ensemble boosting work, 'Imagine rain falling in a different place', in this session: