Dr. Tancrède Leger
@legertancrede.bsky.social
Postdoc RA at University of Lausanne, interested in glacier and ice-sheet dynamics, climatology, Quaternary glaciology, glacier/ice-sheet modelling 🏔🧊💻🧪🇫🇷
https://sites.google.com/view/tancrede-leger
https://sites.google.com/view/tancrede-leger
Pinned
A data-consistent model of the last glaciation in the Alps achieved with physics-driven AI - Nature Communications
This study employs a physics-informed AI model to reconstruct the last glaciation of the European Alps with high accuracy. The approach reduces ice thickness errors by 200–450%, yielding insights into...
doi.org
We have a paper out today in @naturecomms.bsky.social on modelling the last glaciation of the European Alps, resulting in a substantial decrease in long-standing model-data misfits ! doi.org/10.1038/s414...
New paper alert ! 🙂
Happy to share our new study published in The Cryosphere !
doi.org/10.5194/tc-1...
We modelled the evolution of the Greenland Ice Sheet from the LGM (24 ka) to the present and learned a lot on its former history and dynamics !
@jeremyely.bsky.social @chrisdclark.bsky.social
Happy to share our new study published in The Cryosphere !
doi.org/10.5194/tc-1...
We modelled the evolution of the Greenland Ice Sheet from the LGM (24 ka) to the present and learned a lot on its former history and dynamics !
@jeremyely.bsky.social @chrisdclark.bsky.social
November 18, 2025 at 2:35 PM
New paper alert ! 🙂
Happy to share our new study published in The Cryosphere !
doi.org/10.5194/tc-1...
We modelled the evolution of the Greenland Ice Sheet from the LGM (24 ka) to the present and learned a lot on its former history and dynamics !
@jeremyely.bsky.social @chrisdclark.bsky.social
Happy to share our new study published in The Cryosphere !
doi.org/10.5194/tc-1...
We modelled the evolution of the Greenland Ice Sheet from the LGM (24 ka) to the present and learned a lot on its former history and dynamics !
@jeremyely.bsky.social @chrisdclark.bsky.social
Reposted by Dr. Tancrède Leger
The increasing participation of fossil-fuel lobbyists in recent COP meetings is concerning. Climate solutions should be shaped by those committed to real progress, not by those invested in slowing it down.
Fossil fuel lobbyists outnumber all Cop30 delegations except Brazil, report says
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
More than 1,600 fossil fuel lobbyists have been granted access to the Cop30 climate negotiations in Belém, significantly outnumbering every single country’s delegation apart from the host Brazil, new analysis has found.
One in every 25 participants at this year’s UN climate summit is a fossil fuel lobbyist, according to the analysis by the Kick Big Polluters Out (KBPO) coalition, raising serious questions about the corporate capture and credibility of the annual Cop negotiations. Continue reading...
www.theguardian.com
November 14, 2025 at 3:34 PM
The increasing participation of fossil-fuel lobbyists in recent COP meetings is concerning. Climate solutions should be shaped by those committed to real progress, not by those invested in slowing it down.
Reposted by Dr. Tancrède Leger
The new UNEP report is out with the latest estimates of 2100 warming outcomes under current policies, NDCs, and net-zero targets. Here is how it compares to both the IPCC scenarios and other estimates (CAT and IEA, who will release their own updates soon!).
November 4, 2025 at 6:05 PM
The new UNEP report is out with the latest estimates of 2100 warming outcomes under current policies, NDCs, and net-zero targets. Here is how it compares to both the IPCC scenarios and other estimates (CAT and IEA, who will release their own updates soon!).
Reposted by Dr. Tancrède Leger
🌟 Postdoc Opportunity in Marine Biogeochemistry at CNRS-CEREGE!
🚢 Are you a passionate researcher ready to tackle climate change? Dive into the ERC-funded Deep-C project in Aix-en-Provence, France!
⬇️
🚢 Are you a passionate researcher ready to tackle climate change? Dive into the ERC-funded Deep-C project in Aix-en-Provence, France!
⬇️
September 29, 2025 at 10:01 AM
🌟 Postdoc Opportunity in Marine Biogeochemistry at CNRS-CEREGE!
🚢 Are you a passionate researcher ready to tackle climate change? Dive into the ERC-funded Deep-C project in Aix-en-Provence, France!
⬇️
🚢 Are you a passionate researcher ready to tackle climate change? Dive into the ERC-funded Deep-C project in Aix-en-Provence, France!
⬇️
Reposted by Dr. Tancrède Leger
Arsine Glacier
18th Sept. 2025
Great overview of this wonderful site we spent so many time studying! 🥰
The landform bottom L is a moraine complex deposited after a large RA onto the glacier ~10.7 ka
Check our freshly published TCN chronology of Arsine moraine sequence here! 👇
📷 @Meteofranz/IG
1/
18th Sept. 2025
Great overview of this wonderful site we spent so many time studying! 🥰
The landform bottom L is a moraine complex deposited after a large RA onto the glacier ~10.7 ka
Check our freshly published TCN chronology of Arsine moraine sequence here! 👇
📷 @Meteofranz/IG
1/
September 19, 2025 at 2:10 PM
Arsine Glacier
18th Sept. 2025
Great overview of this wonderful site we spent so many time studying! 🥰
The landform bottom L is a moraine complex deposited after a large RA onto the glacier ~10.7 ka
Check our freshly published TCN chronology of Arsine moraine sequence here! 👇
📷 @Meteofranz/IG
1/
18th Sept. 2025
Great overview of this wonderful site we spent so many time studying! 🥰
The landform bottom L is a moraine complex deposited after a large RA onto the glacier ~10.7 ka
Check our freshly published TCN chronology of Arsine moraine sequence here! 👇
📷 @Meteofranz/IG
1/
Reposted by Dr. Tancrède Leger
Are you a #geoscientist looking to transition to an #editorial career? Our #Earth team in Nature Communications is hiring, take a look here. www.nature.com/naturecareer...
Associate or Senior Editor, Nature Communications (Geosciences) - Shanghai, Beijing, Nanjing, New York, Washington, Jersey City, Madrid, Milan (hybrid) job with Springer Nature Ltd | 12844947
Job Title: Associate or Senior Editor, Nature Communications (Geosciences) Location(s): Shanghai, Beijing, Nanjing, New York, Washington, Jersey Ci...
www.nature.com
September 18, 2025 at 8:55 AM
Are you a #geoscientist looking to transition to an #editorial career? Our #Earth team in Nature Communications is hiring, take a look here. www.nature.com/naturecareer...
Reposted by Dr. Tancrède Leger
Polar #geoengineering dismissed as “unimaginably expensive” and “dangerous”
Giant underwater curtains and artificial ice thickening diverts attention from cutting fossil fuel burning, climate scientists argue - but proponents disagree
#climatecrisis
Story by me
www.theguardian.com/environment/...
Giant underwater curtains and artificial ice thickening diverts attention from cutting fossil fuel burning, climate scientists argue - but proponents disagree
#climatecrisis
Story by me
www.theguardian.com/environment/...
Polar geoengineering dismissed as ‘unimaginably expensive’ and ‘dangerous’
Underwater curtains and artificial ice thickening divert attention from cutting fossil fuel use, says group of climate scientists
www.theguardian.com
September 9, 2025 at 10:08 AM
Polar #geoengineering dismissed as “unimaginably expensive” and “dangerous”
Giant underwater curtains and artificial ice thickening diverts attention from cutting fossil fuel burning, climate scientists argue - but proponents disagree
#climatecrisis
Story by me
www.theguardian.com/environment/...
Giant underwater curtains and artificial ice thickening diverts attention from cutting fossil fuel burning, climate scientists argue - but proponents disagree
#climatecrisis
Story by me
www.theguardian.com/environment/...
Reposted by Dr. Tancrède Leger
Canicules, sécheresses et incendies.
Après cet été brûlant, la climatologue Valérie Masson-Delmotte déplore que le gouvernement se cantonne à de la gestion de crise. « On n’a aucun cap au-delà de 2030 », résume-t-elle.
Lire l'article ➡️ https://l.reporterre.net/xWS
Après cet été brûlant, la climatologue Valérie Masson-Delmotte déplore que le gouvernement se cantonne à de la gestion de crise. « On n’a aucun cap au-delà de 2030 », résume-t-elle.
Lire l'article ➡️ https://l.reporterre.net/xWS
September 5, 2025 at 8:46 AM
Canicules, sécheresses et incendies.
Après cet été brûlant, la climatologue Valérie Masson-Delmotte déplore que le gouvernement se cantonne à de la gestion de crise. « On n’a aucun cap au-delà de 2030 », résume-t-elle.
Lire l'article ➡️ https://l.reporterre.net/xWS
Après cet été brûlant, la climatologue Valérie Masson-Delmotte déplore que le gouvernement se cantonne à de la gestion de crise. « On n’a aucun cap au-delà de 2030 », résume-t-elle.
Lire l'article ➡️ https://l.reporterre.net/xWS
Reposted by Dr. Tancrède Leger
I'm not sure many folks realize just how persistent the warming from CO2 is.
Here is a set of 1000-year climate model runs (using FaIR) simulating one year of CO2 emissions (40 gigatons in 2020); a millennia later the world has not cooled back down!
Here is a set of 1000-year climate model runs (using FaIR) simulating one year of CO2 emissions (40 gigatons in 2020); a millennia later the world has not cooled back down!
September 4, 2025 at 10:48 PM
I'm not sure many folks realize just how persistent the warming from CO2 is.
Here is a set of 1000-year climate model runs (using FaIR) simulating one year of CO2 emissions (40 gigatons in 2020); a millennia later the world has not cooled back down!
Here is a set of 1000-year climate model runs (using FaIR) simulating one year of CO2 emissions (40 gigatons in 2020); a millennia later the world has not cooled back down!
Reposted by Dr. Tancrède Leger
Les orages supercellulaires, très rares mais dévastateurs, pourraient augmenter en Europe avec le changement climatique. Une nouvelle étude révèle qu’une hausse de 3 °C suffit à accroître leur fréquence de 11 % en Europe avec un bond bien + marqué dans les Alpes
Explications en GIF orages et chats ⬇️
Explications en GIF orages et chats ⬇️
Les Alpes, un futur foyer d'orages supercellulaires
Les orages supercellulaires, très rares mais dévastateurs, pourraient augmenter en Europe avec le changement climatique. Une nouvelle étude montre qu’un climat plus chaud de 3 °C suffirait à accroître...
www.radiofrance.fr
September 2, 2025 at 5:37 AM
Les orages supercellulaires, très rares mais dévastateurs, pourraient augmenter en Europe avec le changement climatique. Une nouvelle étude révèle qu’une hausse de 3 °C suffit à accroître leur fréquence de 11 % en Europe avec un bond bien + marqué dans les Alpes
Explications en GIF orages et chats ⬇️
Explications en GIF orages et chats ⬇️
Reposted by Dr. Tancrède Leger
Unbelievable experience with the journal Palaeo3. Our manuscript was rejected because… they couldn’t find a second reviewer, and it had been in their system “too long” (7 weeks), according to the editor. In other words, just to preserve their review-speed metrics, they rejected our submission.
August 25, 2025 at 8:48 AM
Unbelievable experience with the journal Palaeo3. Our manuscript was rejected because… they couldn’t find a second reviewer, and it had been in their system “too long” (7 weeks), according to the editor. In other words, just to preserve their review-speed metrics, they rejected our submission.
Reposted by Dr. Tancrède Leger
🌎 Professor of Glaciology, @iceybethan.bsky.social has been selected as a lead author on @ipcc.bsky.social's Report 7 - regarded as the world's most authoritative source of information on climate change.
✍️Find out how Bethan will be involved in this major report >> bit.ly/4mUcoQ1
✍️Find out how Bethan will be involved in this major report >> bit.ly/4mUcoQ1
Newcastle expert chosen as author for next IPCC report
Professor Bethan Davies has been selected as a lead author for the forthcoming Intergovernmental Panel on Climate Change (IPCC) Assessment Report 7.
bit.ly
August 21, 2025 at 12:43 PM
🌎 Professor of Glaciology, @iceybethan.bsky.social has been selected as a lead author on @ipcc.bsky.social's Report 7 - regarded as the world's most authoritative source of information on climate change.
✍️Find out how Bethan will be involved in this major report >> bit.ly/4mUcoQ1
✍️Find out how Bethan will be involved in this major report >> bit.ly/4mUcoQ1
🔥 New paper out! 🔥
A highly detailed TCN-based glacier chronology in the Alps: providing age constraints for a series of late glacial and Holocene glacier and RA events !
Congrats @subfossilguy.bsky.social et al!
Thrilled to have been part of this project!
authors.elsevier.com/a/1lYtM-4PSD...
A highly detailed TCN-based glacier chronology in the Alps: providing age constraints for a series of late glacial and Holocene glacier and RA events !
Congrats @subfossilguy.bsky.social et al!
Thrilled to have been part of this project!
authors.elsevier.com/a/1lYtM-4PSD...
authors.elsevier.com
August 6, 2025 at 4:59 PM
🔥 New paper out! 🔥
A highly detailed TCN-based glacier chronology in the Alps: providing age constraints for a series of late glacial and Holocene glacier and RA events !
Congrats @subfossilguy.bsky.social et al!
Thrilled to have been part of this project!
authors.elsevier.com/a/1lYtM-4PSD...
A highly detailed TCN-based glacier chronology in the Alps: providing age constraints for a series of late glacial and Holocene glacier and RA events !
Congrats @subfossilguy.bsky.social et al!
Thrilled to have been part of this project!
authors.elsevier.com/a/1lYtM-4PSD...
Reposted by Dr. Tancrède Leger
🔥 New paper out! 🔥
So thrilled (that's an understatement) to see this one out after so many yrs in the making!
authors.elsevier.com/a/1lYtM-4PSD...
Big shoutout to my coauthors, especially Irene and Philip! 🙏
We produced the most detailed TCN-based glacier chronology at a single site in the Alps!
So thrilled (that's an understatement) to see this one out after so many yrs in the making!
authors.elsevier.com/a/1lYtM-4PSD...
Big shoutout to my coauthors, especially Irene and Philip! 🙏
We produced the most detailed TCN-based glacier chronology at a single site in the Alps!
August 6, 2025 at 10:54 AM
🔥 New paper out! 🔥
So thrilled (that's an understatement) to see this one out after so many yrs in the making!
authors.elsevier.com/a/1lYtM-4PSD...
Big shoutout to my coauthors, especially Irene and Philip! 🙏
We produced the most detailed TCN-based glacier chronology at a single site in the Alps!
So thrilled (that's an understatement) to see this one out after so many yrs in the making!
authors.elsevier.com/a/1lYtM-4PSD...
Big shoutout to my coauthors, especially Irene and Philip! 🙏
We produced the most detailed TCN-based glacier chronology at a single site in the Alps!
Reposted by Dr. Tancrède Leger
New paper alert!
Holocene glacier and climate changes in central Patagonia.
Led by Carly Peltier. Also with @rlsoteres.bsky.social , and others...
authors.elsevier.com/c/1lN53-4PSD...
Holocene glacier and climate changes in central Patagonia.
Led by Carly Peltier. Also with @rlsoteres.bsky.social , and others...
authors.elsevier.com/c/1lN53-4PSD...
July 14, 2025 at 4:51 PM
New paper alert!
Holocene glacier and climate changes in central Patagonia.
Led by Carly Peltier. Also with @rlsoteres.bsky.social , and others...
authors.elsevier.com/c/1lN53-4PSD...
Holocene glacier and climate changes in central Patagonia.
Led by Carly Peltier. Also with @rlsoteres.bsky.social , and others...
authors.elsevier.com/c/1lN53-4PSD...
Reposted by Dr. Tancrède Leger
Le vide argumentaire du grp macroniste #LoiDuplomb pourrait être risible s'il n’était que politicard.
Mais il est terrifiant de cynisme&irresponsabilité car il compromet tout simplement santé publique, partage des communs...
Il acte aussi +largement une certaine vision politique/rupture démocratique
Mais il est terrifiant de cynisme&irresponsabilité car il compromet tout simplement santé publique, partage des communs...
Il acte aussi +largement une certaine vision politique/rupture démocratique
Gabriel Attal a censuré les commentaires qui n'allaient pas dans son sens lorsqu'il a justifié son vote sur la loi Duplomb. Philippe Grandcolas, directeur de recherche au CNRS, répond à ses arguments point par point :
bonpote.com/loi-duplomb-...
bonpote.com/loi-duplomb-...
Loi Duplomb : réponse à la censure de Gabriel Attal
Suite à la censure du commentaire de Bon Pote sur le réseau social Instagram sous un post de Gabriel Attal concernant la lui Duplomb
bonpote.com
July 13, 2025 at 8:53 AM
Le vide argumentaire du grp macroniste #LoiDuplomb pourrait être risible s'il n’était que politicard.
Mais il est terrifiant de cynisme&irresponsabilité car il compromet tout simplement santé publique, partage des communs...
Il acte aussi +largement une certaine vision politique/rupture démocratique
Mais il est terrifiant de cynisme&irresponsabilité car il compromet tout simplement santé publique, partage des communs...
Il acte aussi +largement une certaine vision politique/rupture démocratique
Reposted by Dr. Tancrède Leger
Who could have predicted? 🙃
Marseille, France's 3rd largest city threatened by huge wildfires after the hottest June on record and a Mediterranean Sea +7°C >normal in early July! 🔥🔥🔥
People have to shut themselves away in their homes! 😱
Do you like the new normal?
🎥 © Jean-Baptiste Rivoallan
Marseille, France's 3rd largest city threatened by huge wildfires after the hottest June on record and a Mediterranean Sea +7°C >normal in early July! 🔥🔥🔥
People have to shut themselves away in their homes! 😱
Do you like the new normal?
🎥 © Jean-Baptiste Rivoallan
July 8, 2025 at 2:18 PM
Who could have predicted? 🙃
Marseille, France's 3rd largest city threatened by huge wildfires after the hottest June on record and a Mediterranean Sea +7°C >normal in early July! 🔥🔥🔥
People have to shut themselves away in their homes! 😱
Do you like the new normal?
🎥 © Jean-Baptiste Rivoallan
Marseille, France's 3rd largest city threatened by huge wildfires after the hottest June on record and a Mediterranean Sea +7°C >normal in early July! 🔥🔥🔥
People have to shut themselves away in their homes! 😱
Do you like the new normal?
🎥 © Jean-Baptiste Rivoallan
Reposted by Dr. Tancrède Leger
I’m delighted to share that our new paper is now out in @natclimate.nature.com! Our long-term, monthly Antarctic-wide dataset of surface meltwater shows that the East Antarctic Ice Sheet is becoming increasingly prone to surface meltwater ponding.
Continent-wide mapping shows increasing sensitivity of East Antarctica to meltwater ponding - Nature Climate Change
This study provides a continent-wide assessment of surface meltwater area in Antarctica between 2006 and 2021, highlighting recent increases in magnitude and variability in East Antarctica, with indic...
www.nature.com
July 4, 2025 at 11:13 AM
I’m delighted to share that our new paper is now out in @natclimate.nature.com! Our long-term, monthly Antarctic-wide dataset of surface meltwater shows that the East Antarctic Ice Sheet is becoming increasingly prone to surface meltwater ponding.
A little preview of the 3D topo of the Swiss alps with our LGM-to-future glacier simulation movie projected onto : and which will soon depart for the Universal exhibition in Osaka (Swiss pavillon)! Currently in the Geopolis of University of Lausanne for those who want to check it out !
June 28, 2025 at 12:43 PM
A little preview of the 3D topo of the Swiss alps with our LGM-to-future glacier simulation movie projected onto : and which will soon depart for the Universal exhibition in Osaka (Swiss pavillon)! Currently in the Geopolis of University of Lausanne for those who want to check it out !
Delighted to announce that we will present modelling results from our study on the last glaciation of the Alps at the Osaka Universal Exhibition this summer!
LGM-to-future evolution of glaciers projected on 3D wood-carved topo of the Alps !
Details: www.unil.ch/news/fr/1750...
#OsakaWorldExpo
LGM-to-future evolution of glaciers projected on 3D wood-carved topo of the Alps !
Details: www.unil.ch/news/fr/1750...
#OsakaWorldExpo
Les Alpes comme on ne les a jamais vues : cette maquette de visualisation 3D partira pour Osaka
Des scientifiques de l’UNIL ont réalisé une maquette de visualisation 3D unique, qui montre l’évolution de la couverture glaciaire en Suisse depuis la dernière grande glaciation, et jusque dans un fut...
www.unil.ch
June 23, 2025 at 8:56 AM
Delighted to announce that we will present modelling results from our study on the last glaciation of the Alps at the Osaka Universal Exhibition this summer!
LGM-to-future evolution of glaciers projected on 3D wood-carved topo of the Alps !
Details: www.unil.ch/news/fr/1750...
#OsakaWorldExpo
LGM-to-future evolution of glaciers projected on 3D wood-carved topo of the Alps !
Details: www.unil.ch/news/fr/1750...
#OsakaWorldExpo
Reposted by Dr. Tancrède Leger
Le tableau de bord des indicateurs clés de l'état du climat et de l'influence humaine a été réactualisé, il est à votre disposition ici :
climatechangetracker.org/igcc
climatechangetracker.org/igcc
June 19, 2025 at 1:20 PM
Le tableau de bord des indicateurs clés de l'état du climat et de l'influence humaine a été réactualisé, il est à votre disposition ici :
climatechangetracker.org/igcc
climatechangetracker.org/igcc
Reposted by Dr. Tancrède Leger
Final study of my PhD is out!
www.science.org/doi/10.1126/...
www.nytimes.com/2025/05/29/c...
Our multi-model, multi-millennial glacier study shows:
Every 0.1°C less warming preserves ~2% more mountain glacier mass; long-term impacts are much larger than 2100-only projections suggest.
www.science.org/doi/10.1126/...
www.nytimes.com/2025/05/29/c...
Our multi-model, multi-millennial glacier study shows:
Every 0.1°C less warming preserves ~2% more mountain glacier mass; long-term impacts are much larger than 2100-only projections suggest.
May 29, 2025 at 7:02 PM
Final study of my PhD is out!
www.science.org/doi/10.1126/...
www.nytimes.com/2025/05/29/c...
Our multi-model, multi-millennial glacier study shows:
Every 0.1°C less warming preserves ~2% more mountain glacier mass; long-term impacts are much larger than 2100-only projections suggest.
www.science.org/doi/10.1126/...
www.nytimes.com/2025/05/29/c...
Our multi-model, multi-millennial glacier study shows:
Every 0.1°C less warming preserves ~2% more mountain glacier mass; long-term impacts are much larger than 2100-only projections suggest.
Reposted by Dr. Tancrède Leger
Some thoughts on the #Blatten landslide, drawing heavily on the vital and excellent updates from @subfossilguy.bsky.social and @davepetley.bsky.social
www.antarcticglaciers.org/2025/05/birc...
www.antarcticglaciers.org/2025/05/birc...
Birch Glacier Landslide - AntarcticGlaciers.org
The collapse of Birch Glacier and the devastating landslide that impacted the Swiss village of Blatten occurred as a result of supraglacial landslides.
www.antarcticglaciers.org
May 29, 2025 at 4:55 PM
Some thoughts on the #Blatten landslide, drawing heavily on the vital and excellent updates from @subfossilguy.bsky.social and @davepetley.bsky.social
www.antarcticglaciers.org/2025/05/birc...
www.antarcticglaciers.org/2025/05/birc...
Reposted by Dr. Tancrède Leger
Scientists show that +1.5 °C is far too warm for Earth's ice sheets and will result in several metres of sea-level rise over the coming centuries, extensive loss and damage to coastal populations and will challenge the implementation of adaptation measures
www.nature.com/articles/s43...
www.nature.com/articles/s43...
Warming of +1.5 °C is too high for polar ice sheets - Communications Earth & Environment
Warming of +1.5 °C above pre-industrial levels is too high for the Greenland and Antarctic ice sheets, and even the current climate forcing of +1.2 °C is likely to lead to several meters of sea-level ...
www.nature.com
May 20, 2025 at 10:59 AM
Scientists show that +1.5 °C is far too warm for Earth's ice sheets and will result in several metres of sea-level rise over the coming centuries, extensive loss and damage to coastal populations and will challenge the implementation of adaptation measures
www.nature.com/articles/s43...
www.nature.com/articles/s43...
Reposted by Dr. Tancrède Leger
Model suggests impact of global warming on AMOC has led to increased flooding along US Northeast Coast phys.org/news/2025-05...
May 20, 2025 at 2:37 AM
Model suggests impact of global warming on AMOC has led to increased flooding along US Northeast Coast phys.org/news/2025-05...