Chahan Kropf
@chahank.bsky.social
Climate Risk Scientist | Quantum Physicist | CLIMADA principal developer | Postdoc at ETH Zürich | Nature activist | Opinions my own |
Pinned
Climate Risk, Modelling, and Impacts: A Collaborative Approach to Understanding and Addressing Climate Change
benasque.org
🌍 Join the Climate Risk, Modelling & Impacts workshop at the Benasque Science Center 🇪🇸 — Sept 20–Oct 3 2026.
Collaborative, open-format discussions on climate risk, modelling & adaptation.
Info & registration 👉 benasque.org/2026climate/
#ClimateRisk #ClimateScience #Adaptation
Collaborative, open-format discussions on climate risk, modelling & adaptation.
Info & registration 👉 benasque.org/2026climate/
#ClimateRisk #ClimateScience #Adaptation
Reposted by Chahan Kropf
Is the Atlantic Ocean circulation close to tipping?
Hear the latest science as I presented it last month at the ATLAS25 event in Helsinki.
Let me know if anything is unclear, or if you see good reasons why your government shouldn't immediately act on this. 🌊
youtu.be/ULJXqOZuY-8
Hear the latest science as I presented it last month at the ATLAS25 event in Helsinki.
Let me know if anything is unclear, or if you see good reasons why your government shouldn't immediately act on this. 🌊
youtu.be/ULJXqOZuY-8
Is the Atlantic Ocean circulation close to tipping?
YouTube video by Earth System Analysis - Potsdam Institute
youtu.be
November 16, 2025 at 3:35 PM
Is the Atlantic Ocean circulation close to tipping?
Hear the latest science as I presented it last month at the ATLAS25 event in Helsinki.
Let me know if anything is unclear, or if you see good reasons why your government shouldn't immediately act on this. 🌊
youtu.be/ULJXqOZuY-8
Hear the latest science as I presented it last month at the ATLAS25 event in Helsinki.
Let me know if anything is unclear, or if you see good reasons why your government shouldn't immediately act on this. 🌊
youtu.be/ULJXqOZuY-8
Reposted by Chahan Kropf
Assessments of government action on climate change—and public desire for climate action—should always explicitly consider how much cajoling and lobbying and pressure from oil and gas there is to do nothing.
This is a fight; not (just) a technological transition.
www.theguardian.com/environment/...
This is a fight; not (just) a technological transition.
www.theguardian.com/environment/...
Fossil fuel lobbyists outnumber all Cop30 delegations except Brazil, report says
One in every 25 participants at 2025 UN climate summit is a fossil fuel lobbyist, according to Kick Big Polluters Out
www.theguardian.com
November 14, 2025 at 1:11 PM
Assessments of government action on climate change—and public desire for climate action—should always explicitly consider how much cajoling and lobbying and pressure from oil and gas there is to do nothing.
This is a fight; not (just) a technological transition.
www.theguardian.com/environment/...
This is a fight; not (just) a technological transition.
www.theguardian.com/environment/...
Reposted by Chahan Kropf
CAT Global Update 2025 🚨 Ten years after the #ParisAgreement we see little to no measurable progress in warming projections - for the fourth consecutive year.
The 2035 #NDCs have made no difference to our warming outlook.
🔗 bit.ly/CAT_Global_2...
The 2035 #NDCs have made no difference to our warming outlook.
🔗 bit.ly/CAT_Global_2...
November 13, 2025 at 10:01 AM
CAT Global Update 2025 🚨 Ten years after the #ParisAgreement we see little to no measurable progress in warming projections - for the fourth consecutive year.
The 2035 #NDCs have made no difference to our warming outlook.
🔗 bit.ly/CAT_Global_2...
The 2035 #NDCs have made no difference to our warming outlook.
🔗 bit.ly/CAT_Global_2...
Reposted by Chahan Kropf
MeteoSwiss, ETH Zurich, and C2SM present the new Swiss climate scenarios.
These show how the Swiss climate will change if the global average temperature rises by 3 degrees. ethz.ch/en/news-and-...
@meteoschweiz.ch, @usyseth.bsky.social #klimaszenarien #meteoschweiz #ETH #C2SM #NCCS
These show how the Swiss climate will change if the global average temperature rises by 3 degrees. ethz.ch/en/news-and-...
@meteoschweiz.ch, @usyseth.bsky.social #klimaszenarien #meteoschweiz #ETH #C2SM #NCCS
Climate change particularly pronounced in Switzerland
Switzerland will become drier and hotter, experience less snow and face heavier rainfall in the future. Those are the conclusions reached by climate researchers from its Federal Office of Meteorology ...
ethz.ch
November 4, 2025 at 10:17 AM
MeteoSwiss, ETH Zurich, and C2SM present the new Swiss climate scenarios.
These show how the Swiss climate will change if the global average temperature rises by 3 degrees. ethz.ch/en/news-and-...
@meteoschweiz.ch, @usyseth.bsky.social #klimaszenarien #meteoschweiz #ETH #C2SM #NCCS
These show how the Swiss climate will change if the global average temperature rises by 3 degrees. ethz.ch/en/news-and-...
@meteoschweiz.ch, @usyseth.bsky.social #klimaszenarien #meteoschweiz #ETH #C2SM #NCCS
Reposted by Chahan Kropf
New study in Nature by Lin et al shows how the sea-level rise from the melting Ice Age ice (a total of 120 meters rise) ended thousands of years ago.
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
November 3, 2025 at 12:09 PM
New study in Nature by Lin et al shows how the sea-level rise from the melting Ice Age ice (a total of 120 meters rise) ended thousands of years ago.
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
Until our fossil fuel use started a new phase of rising seas.
Graph shows the global mean rate of sea level rise.
🌊
www.nature.com/articles/s41...
Reposted by Chahan Kropf
🎉 We are thrilled to share that #SPARCCLE researcher Yann Quilcaille has been named to the TIME 100 Climate 2025 list - recognising global leaders driving real #ClimateAction.
Read the full interview: time.com/collections/...
Read his recent study published in Nature: #LinksInComments
Read the full interview: time.com/collections/...
Read his recent study published in Nature: #LinksInComments
October 31, 2025 at 12:08 PM
🎉 We are thrilled to share that #SPARCCLE researcher Yann Quilcaille has been named to the TIME 100 Climate 2025 list - recognising global leaders driving real #ClimateAction.
Read the full interview: time.com/collections/...
Read his recent study published in Nature: #LinksInComments
Read the full interview: time.com/collections/...
Read his recent study published in Nature: #LinksInComments
Reposted by Chahan Kropf
Congratulations to #IPCC Bureau Member, @soniaseneviratne.bsky.social on the German Environmental Award from German Federal Environmental Foundation - the first Swiss national to win the prestigious €500K Award. A powerful recognition of her global impact in land-climate science. 🌍👏 #ETHZurich
October 30, 2025 at 7:47 PM
Congratulations to #IPCC Bureau Member, @soniaseneviratne.bsky.social on the German Environmental Award from German Federal Environmental Foundation - the first Swiss national to win the prestigious €500K Award. A powerful recognition of her global impact in land-climate science. 🌍👏 #ETHZurich
Reposted by Chahan Kropf
Today, the UNFCCC released its #SynthesisReport, reviewing climate plans from 64 countries. Countries representing 64% of global emissions still have not formally submitted new #NDCs.
Full statement from Melanie Robinson 👉 bit.ly/3LcAWpM
Full statement from Melanie Robinson 👉 bit.ly/3LcAWpM
October 28, 2025 at 4:01 PM
Today, the UNFCCC released its #SynthesisReport, reviewing climate plans from 64 countries. Countries representing 64% of global emissions still have not formally submitted new #NDCs.
Full statement from Melanie Robinson 👉 bit.ly/3LcAWpM
Full statement from Melanie Robinson 👉 bit.ly/3LcAWpM
📢 Invited Perspectives: Fostering #interoperability of data, models, communication, and #governance for disaster resilience through transdisciplinary knowledge #coproduction
The DIRECTED Project shares research insights!
👉 nhess.copernicus.org/articles/25/...
#DRM #CCA #disasterresilience
The DIRECTED Project shares research insights!
👉 nhess.copernicus.org/articles/25/...
#DRM #CCA #disasterresilience
Invited perspectives: Fostering interoperability of data, models, communication, and governance for disaster resilience through transdisciplinary knowledge co-production
Abstract. Despite considerable efforts and progress in increasing resilience to natural hazards, the adverse socio-economic impacts of extreme weather events continue to increase globally. As climate ...
nhess.copernicus.org
October 28, 2025 at 2:53 PM
📢 Invited Perspectives: Fostering #interoperability of data, models, communication, and #governance for disaster resilience through transdisciplinary knowledge #coproduction
The DIRECTED Project shares research insights!
👉 nhess.copernicus.org/articles/25/...
#DRM #CCA #disasterresilience
The DIRECTED Project shares research insights!
👉 nhess.copernicus.org/articles/25/...
#DRM #CCA #disasterresilience
"Climate change impacts on ecosystems: Disturbance regimes, extreme weather, vulnerability, and resilience"
Join us at #EGU26! ITS2.6/BG10.9
Join us at #EGU26! ITS2.6/BG10.9
October 28, 2025 at 10:45 AM
"Climate change impacts on ecosystems: Disturbance regimes, extreme weather, vulnerability, and resilience"
Join us at #EGU26! ITS2.6/BG10.9
Join us at #EGU26! ITS2.6/BG10.9
🌍 Join the Climate Risk, Modelling & Impacts workshop at the Benasque Science Center 🇪🇸 — Sept 20–Oct 3 2026.
Collaborative, open-format discussions on climate risk, modelling & adaptation.
Info & registration 👉 benasque.org/2026climate/
#ClimateRisk #ClimateScience #Adaptation
Collaborative, open-format discussions on climate risk, modelling & adaptation.
Info & registration 👉 benasque.org/2026climate/
#ClimateRisk #ClimateScience #Adaptation
Climate Risk, Modelling, and Impacts: A Collaborative Approach to Understanding and Addressing Climate Change
benasque.org
October 21, 2025 at 8:56 AM
🌍 Join the Climate Risk, Modelling & Impacts workshop at the Benasque Science Center 🇪🇸 — Sept 20–Oct 3 2026.
Collaborative, open-format discussions on climate risk, modelling & adaptation.
Info & registration 👉 benasque.org/2026climate/
#ClimateRisk #ClimateScience #Adaptation
Collaborative, open-format discussions on climate risk, modelling & adaptation.
Info & registration 👉 benasque.org/2026climate/
#ClimateRisk #ClimateScience #Adaptation
Reposted by Chahan Kropf
Our global study on the state of trust in scientists is now out in Nature Human Behaviour! 🥳
With a team of 241 researchers, we surveyed 71,922 people in 68 countries, providing the largest dataset on trust in scientists post-pandemic 👇🧵https://www.nature.com/articles/s41562-024-02090-5
With a team of 241 researchers, we surveyed 71,922 people in 68 countries, providing the largest dataset on trust in scientists post-pandemic 👇🧵https://www.nature.com/articles/s41562-024-02090-5
January 20, 2025 at 10:16 AM
Our global study on the state of trust in scientists is now out in Nature Human Behaviour! 🥳
With a team of 241 researchers, we surveyed 71,922 people in 68 countries, providing the largest dataset on trust in scientists post-pandemic 👇🧵https://www.nature.com/articles/s41562-024-02090-5
With a team of 241 researchers, we surveyed 71,922 people in 68 countries, providing the largest dataset on trust in scientists post-pandemic 👇🧵https://www.nature.com/articles/s41562-024-02090-5
Reposted by Chahan Kropf
New study explores how marine heatwaves contribute to coral bleaching. While deeper coral reefs are often viewed as potential refuges from climate change, we suggest they often experience higher thermal stress and bleaching levels compared to shallow reefs iopscience.iop.org/article/10.1...
Modelling marine heatwaves impact on shallow and upper mesophotic tropical coral reefs - IOPscienceSearch
Modelling marine heatwaves impact on shallow and upper mesophotic tropical coral reefs, Nicolas Colombi, Chahan M Kropf, Friedrich A Burger, David N Bresch, Thomas L Frölicher
iopscience.iop.org
November 16, 2024 at 8:37 AM
New study explores how marine heatwaves contribute to coral bleaching. While deeper coral reefs are often viewed as potential refuges from climate change, we suggest they often experience higher thermal stress and bleaching levels compared to shallow reefs iopscience.iop.org/article/10.1...
Reposted by Chahan Kropf
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...
Reposted by Chahan Kropf
People need to plan for climate risks. The research is there, but the usability for stakeholders can be limited. We introduce the reversal of the impact chain approach for actionable climate information that allows linking local risk levels directly to GHG emission. www.nature.com/articles/s41...
Reversal of the impact chain for actionable climate information - Nature Geoscience
Providing actionable climate information requires an end-user focused approach that links specific local climate risk thresholds with global emissions pathways.
www.nature.com
January 3, 2025 at 10:10 AM
People need to plan for climate risks. The research is there, but the usability for stakeholders can be limited. We introduce the reversal of the impact chain approach for actionable climate information that allows linking local risk levels directly to GHG emission. www.nature.com/articles/s41...
Reposted by Chahan Kropf
🌪️🌍🌿 Tropical storms will challenge up to 9.4% of Earth’s terrestrial ecosystems, say researchers led by Chahan M. Kropf from @ethzurich.bsky.social 👉 usys.ethz.ch/en/news-even...
January 21, 2025 at 2:09 PM
🌪️🌍🌿 Tropical storms will challenge up to 9.4% of Earth’s terrestrial ecosystems, say researchers led by Chahan M. Kropf from @ethzurich.bsky.social 👉 usys.ethz.ch/en/news-even...
Reposted by Chahan Kropf
🚨 Important paper in Nature: "Systematic attribution of heatwaves to the emissions of carbon majors".
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Systematic attribution of heatwaves to the emissions of carbon majors - Nature
Climate change made 213 historical heatwaves reported over 2000–2023 more likely and more intense, to which each of the 180 carbon majors (fossil fuel and cement producers) substantially contributed.
www.nature.com
September 10, 2025 at 5:41 PM
🚨 Important paper in Nature: "Systematic attribution of heatwaves to the emissions of carbon majors".
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Chahan Kropf
This study is based on a great collaboration of our #TISP consortium and @simonameiler.bsky.social, Chahan Kropf, @samluethi.bsky.social and David N. Bresch (@ethz.ch). @colognaviktoria.bsky.social and I joined forces with them to combine our worldwide survey data with their climate modelling data 🤝
July 4, 2025 at 9:04 AM
This study is based on a great collaboration of our #TISP consortium and @simonameiler.bsky.social, Chahan Kropf, @samluethi.bsky.social and David N. Bresch (@ethz.ch). @colognaviktoria.bsky.social and I joined forces with them to combine our worldwide survey data with their climate modelling data 🤝
Reposted by Chahan Kropf
What if companies disclosed climate risk the same way insurers analyze it: with event-based probabilistic models that show what could happen, when, and with what likelihood?
Check out our new paper in Environmental Research: Climate to learn more!
iopscience.iop.org/article/10.1...
Check out our new paper in Environmental Research: Climate to learn more!
iopscience.iop.org/article/10.1...
August 25, 2025 at 5:04 PM
What if companies disclosed climate risk the same way insurers analyze it: with event-based probabilistic models that show what could happen, when, and with what likelihood?
Check out our new paper in Environmental Research: Climate to learn more!
iopscience.iop.org/article/10.1...
Check out our new paper in Environmental Research: Climate to learn more!
iopscience.iop.org/article/10.1...
Reposted by Chahan Kropf
160 scientists, 23 countries, 1 report: The Global Tipping Points Report 2025, together with @exeter.ac.uk, highlights mounting risks across Earth’s systems, from melting glaciers & ice fields to slowing ocean currents, ice sheets & rainforests under pressure. Watch now👇
👉global-tipping-points.org
👉global-tipping-points.org
October 13, 2025 at 3:01 PM
160 scientists, 23 countries, 1 report: The Global Tipping Points Report 2025, together with @exeter.ac.uk, highlights mounting risks across Earth’s systems, from melting glaciers & ice fields to slowing ocean currents, ice sheets & rainforests under pressure. Watch now👇
👉global-tipping-points.org
👉global-tipping-points.org