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
Hot off the press in the journal Science Advances:
A new era of bioclimatic extremes in the terrestrial Arctic
www.science.org/doi/10.1126/...
Our new paper was published today!
A new era of bioclimatic extremes in the terrestrial Arctic
www.science.org/doi/10.1126/...
Our new paper was published today!
A new era of bioclimatic extremes in the terrestrial Arctic
Long-term climate data suggest that the Arctic is entering a new era of bioclimatic extremes threatening cold ecosystems.
www.science.org
January 7, 2026 at 7:22 PM
Hot off the press in the journal Science Advances:
A new era of bioclimatic extremes in the terrestrial Arctic
www.science.org/doi/10.1126/...
Our new paper was published today!
A new era of bioclimatic extremes in the terrestrial Arctic
www.science.org/doi/10.1126/...
Our new paper was published today!
Reposted by Erich Fischer
The Trump Administration's plan to dismantle the @ncar-ucar.bsky.social is senseless & dangerous.
It would weaken weather forecasting, climate research, & the science that keeps people safe.
We urge that this plan be abandoned.
Call Congress to #SaveNCAR today. buff.ly/7ka1BQA
It would weaken weather forecasting, climate research, & the science that keeps people safe.
We urge that this plan be abandoned.
Call Congress to #SaveNCAR today. buff.ly/7ka1BQA
Save NCAR from being dismantled today!
The Trump Administration has vowed to dissolve the center that provides critical extreme weather and climate data for our nation.
buff.ly
December 17, 2025 at 7:44 PM
The Trump Administration's plan to dismantle the @ncar-ucar.bsky.social is senseless & dangerous.
It would weaken weather forecasting, climate research, & the science that keeps people safe.
We urge that this plan be abandoned.
Call Congress to #SaveNCAR today. buff.ly/7ka1BQA
It would weaken weather forecasting, climate research, & the science that keeps people safe.
We urge that this plan be abandoned.
Call Congress to #SaveNCAR today. buff.ly/7ka1BQA
Reposted by Erich Fischer
It appears that the U.S. Environmental Protection Agency (EPA) has, within the past week, scrubbed a large amount of climate change content from its official website, as well as *removed human-caused warming* from the discussion on its "causes of climate change" page.
December 8, 2025 at 5:50 PM
It appears that the U.S. Environmental Protection Agency (EPA) has, within the past week, scrubbed a large amount of climate change content from its official website, as well as *removed human-caused warming* from the discussion on its "causes of climate change" page.
Starting the first lead author meeting of the @Ipcc #AR7 report in Paris! For the first time, WG1, WG2 and WG3 meet together in a lead author meeting. Great to see so much expertise and enthusiasm to kick off the next report.
December 1, 2025 at 2:33 PM
Starting the first lead author meeting of the @Ipcc #AR7 report in Paris! For the first time, WG1, WG2 and WG3 meet together in a lead author meeting. Great to see so much expertise and enthusiasm to kick off the next report.
Many thanks to the fantastic team of PhD and MSc students, postdocs, IT and administrative staff and colleagues at @ethz.ch and across the world who helped to make this possible. I am very honored to be listed again. Special thanks to the @usyseth.bsky.social for the excellent research environment.
November 17, 2025 at 2:19 PM
Many thanks to the fantastic team of PhD and MSc students, postdocs, IT and administrative staff and colleagues at @ethz.ch and across the world who helped to make this possible. I am very honored to be listed again. Special thanks to the @usyseth.bsky.social for the excellent research environment.
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...
In den letzten 75 Jahren sind mehr Hitzerekorde aufgetreten, als man eigentlich in 100'000 Jahren erwarten würde. Verantwortlich dafür ist die aussergewöhnlich hohe Erwärmungsrate. Es gilt: Je schneller die Erwärmung, desto häufiger die Hitzerekorde.
June 30, 2025 at 5:40 AM
In den letzten 75 Jahren sind mehr Hitzerekorde aufgetreten, als man eigentlich in 100'000 Jahren erwarten würde. Verantwortlich dafür ist die aussergewöhnlich hohe Erwärmungsrate. Es gilt: Je schneller die Erwärmung, desto häufiger die Hitzerekorde.
Die Hitze bricht schon wieder Rekorde: 46 °C in Spanien und Schmelztemperaturen auf dem Mont Blanc. Was früher Ende Juli oder Anfang August extrem war, tritt heute schon im Juni auf.
Heute treten jährlich mehr als viermal so viele Hitzerekorde auf, wie man es ohne den Klimawandel erwarten würde.
Heute treten jährlich mehr als viermal so viele Hitzerekorde auf, wie man es ohne den Klimawandel erwarten würde.
June 30, 2025 at 5:40 AM
Die Hitze bricht schon wieder Rekorde: 46 °C in Spanien und Schmelztemperaturen auf dem Mont Blanc. Was früher Ende Juli oder Anfang August extrem war, tritt heute schon im Juni auf.
Heute treten jährlich mehr als viermal so viele Hitzerekorde auf, wie man es ohne den Klimawandel erwarten würde.
Heute treten jährlich mehr als viermal so viele Hitzerekorde auf, wie man es ohne den Klimawandel erwarten würde.
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...
Thanks to the @carbonbrief.org team and my co-authors. The Nature Reviews Earth&Enivronment review paper is available here:
rdcu.be/eqPrN
rdcu.be/eqPrN
Record-breaking extremes in a warming climate
Nature Reviews Earth & Environment - Multiple record-breaking climate events have been observed, posing socioeconomic risks. This Review outlines observed and projected changes in...
rdcu.be
June 13, 2025 at 11:10 AM
Thanks to the @carbonbrief.org team and my co-authors. The Nature Reviews Earth&Enivronment review paper is available here:
rdcu.be/eqPrN
rdcu.be/eqPrN
Find the original @natrevearthenviron.nature.com article with important contributions from co-authors Margot Bador, Raphaël Huser, Lizzie Kendon, Alexander Robinson, and @sebastian-sippel.bsky.social
rdcu.be/eqPrN
rdcu.be/eqPrN
Record-breaking extremes in a warming climate
Nature Reviews Earth & Environment - Multiple record-breaking climate events have been observed, posing socioeconomic risks. This Review outlines observed and projected changes in...
rdcu.be
June 13, 2025 at 10:40 AM
Find the original @natrevearthenviron.nature.com article with important contributions from co-authors Margot Bador, Raphaël Huser, Lizzie Kendon, Alexander Robinson, and @sebastian-sippel.bsky.social
rdcu.be/eqPrN
rdcu.be/eqPrN
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/...