Simon Gascoin
@sgascoin.bsky.social
Reposted by Simon Gascoin
[1/5] @sgascoin.bsky.social chercheur CNRS au CESBIO-OMP montre que le jour de déneigement a avancé d’environ 5 jours par décennie depuis 1986 dans les Alpes et les Pyrénées, jusqu’à 10 jours à certaines altitudes. Ce décalage menace l’équilibre des socio-écosystèmes montagnards. #geography
Évolution du jour de déneigement dans les Alpes françaises et les Pyrénées
Des scientifiques du CNRS Terre & Univers et du CNRS Ecologie & Environnement ont étudié les bouleversements
www.insu.cnrs.fr
August 31, 2025 at 6:34 AM
[1/5] @sgascoin.bsky.social chercheur CNRS au CESBIO-OMP montre que le jour de déneigement a avancé d’environ 5 jours par décennie depuis 1986 dans les Alpes et les Pyrénées, jusqu’à 10 jours à certaines altitudes. Ce décalage menace l’équilibre des socio-écosystèmes montagnards. #geography
Reposted by Simon Gascoin
Very nice overview of the recent #GLOF in Pakistan by @sgascoin.bsky.social!
There is so much going on these days, it’s great that various people in the community manage to find time to document these events! Fingers crossed that nobody was harmed. www.cesbio.cnrs.fr/multitemp/ra...
There is so much going on these days, it’s great that various people in the community manage to find time to document these events! Fingers crossed that nobody was harmed. www.cesbio.cnrs.fr/multitemp/ra...
Rapid analysis of the GLOF in Gupis, Gilgit-Baltistan – Séries Temporelles
The
www.cesbio.cnrs.fr
August 25, 2025 at 3:01 PM
Very nice overview of the recent #GLOF in Pakistan by @sgascoin.bsky.social!
There is so much going on these days, it’s great that various people in the community manage to find time to document these events! Fingers crossed that nobody was harmed. www.cesbio.cnrs.fr/multitemp/ra...
There is so much going on these days, it’s great that various people in the community manage to find time to document these events! Fingers crossed that nobody was harmed. www.cesbio.cnrs.fr/multitemp/ra...
My rapid analysis of the recent GLOF (?) in Gupis, Gilgit-Baltistan www.cesbio.cnrs.fr/multitemp/ra...
August 24, 2025 at 1:23 AM
My rapid analysis of the recent GLOF (?) in Gupis, Gilgit-Baltistan www.cesbio.cnrs.fr/multitemp/ra...
Five years in the making.. New study about the snow cover trends in the Alps and Pyrenees tc.copernicus.org/articles/19/...
Trends in the annual snow melt-out day over the French Alps and Pyrenees from 38 years of high-resolution satellite data (1986–2023)
Abstract. Information on the spatial–temporal variability of seasonal snow cover duration over long time periods is critical for studying the responses of mountain ecosystems to climate change. Howeve...
tc.copernicus.org
July 8, 2025 at 7:07 AM
Five years in the making.. New study about the snow cover trends in the Alps and Pyrenees tc.copernicus.org/articles/19/...
Reposted by Simon Gascoin
I suspect someone may have already done this... I took the current NASA Earth fleet chart of operating and planned Earth observing missions and crossed out those recommended for cancellation in the President's budget request. It's disturbing.
June 1, 2025 at 2:45 AM
I suspect someone may have already done this... I took the current NASA Earth fleet chart of operating and planned Earth observing missions and crossed out those recommended for cancellation in the President's budget request. It's disturbing.
Reposted by Simon Gascoin
I also derived a new elevation model from the aerial images, allowing me to visualize the elevation change in the affected areas.
The rocks and debris in the valley are locally up to 32m thick and I estimate the total displaced volume is about 11 million cubic meters. #Blatten
The rocks and debris in the valley are locally up to 32m thick and I estimate the total displaced volume is about 11 million cubic meters. #Blatten
June 1, 2025 at 9:39 AM
I also derived a new elevation model from the aerial images, allowing me to visualize the elevation change in the affected areas.
The rocks and debris in the valley are locally up to 32m thick and I estimate the total displaced volume is about 11 million cubic meters. #Blatten
The rocks and debris in the valley are locally up to 32m thick and I estimate the total displaced volume is about 11 million cubic meters. #Blatten
Which parts of the world have the snowiest forests? Check our new paper in Geophysical Research Letters and the accompanying online visualisation by Deschamps-Berger et al. agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Where Snow and Forest Meet: A Global Atlas
A global atlas of the importance of snowfall in forest was calculated at 0.1° resolution from existing reanalysis and tree cover data Snow falls in forest over 23% of the land mass, mostly in the...
agupubs.onlinelibrary.wiley.com
May 21, 2025 at 11:19 AM
Which parts of the world have the snowiest forests? Check our new paper in Geophysical Research Letters and the accompanying online visualisation by Deschamps-Berger et al. agupubs.onlinelibrary.wiley.com/doi/10.1029/...
We have generated a Landsat-based dataset to characterize the snow melt-out date in the Pyrenees, Alps, and Greater Caucasus. Data and code available! www.nature.com/articles/s41... by Bayle et al.
Snow melt-out date (SMOD) change spanning four decades in European temperate mountains at 30 m from Landsat time series - Scientific Data
Scientific Data - Snow melt-out date (SMOD) change spanning four decades in European temperate mountains at 30 m from Landsat time series
www.nature.com
April 30, 2025 at 10:27 AM
We have generated a Landsat-based dataset to characterize the snow melt-out date in the Pyrenees, Alps, and Greater Caucasus. Data and code available! www.nature.com/articles/s41... by Bayle et al.
Our carbon-intensive lifestyle has a strong impact on the Alps' water cycle and ecosystems. This review by Dumont et al. is a good starter for students and anyone interested in climate change impacts in the Alps. comptes-rendus.academie-sciences.fr/geoscience/a...
The European Alps in a changing climate: physical trends and impacts
comptes-rendus.academie-sciences.fr
April 30, 2025 at 10:26 AM
Our carbon-intensive lifestyle has a strong impact on the Alps' water cycle and ecosystems. This review by Dumont et al. is a good starter for students and anyone interested in climate change impacts in the Alps. comptes-rendus.academie-sciences.fr/geoscience/a...
Reposted by Simon Gascoin
Incredible satellite image of the 33 (!!!!) operational fossil fuel combustion engines at the site of Elon Musk's XAI data centre
“appalling that xAI would operate more than 30 methane gas turbines without any permits or any public oversight"
@selc.bsky.social
www.theguardian.com/technology/2...
“appalling that xAI would operate more than 30 methane gas turbines without any permits or any public oversight"
@selc.bsky.social
www.theguardian.com/technology/2...
April 25, 2025 at 11:18 AM
Incredible satellite image of the 33 (!!!!) operational fossil fuel combustion engines at the site of Elon Musk's XAI data centre
“appalling that xAI would operate more than 30 methane gas turbines without any permits or any public oversight"
@selc.bsky.social
www.theguardian.com/technology/2...
“appalling that xAI would operate more than 30 methane gas turbines without any permits or any public oversight"
@selc.bsky.social
www.theguardian.com/technology/2...
Reposted by Simon Gascoin
Bad news for Heard Island as the US imposes a 10% tariff on its main export - windborne glaciovolcanic tephra. This is viewed as a boost for local Alaskan and Cascadia sources.
Particularly serious implications for very fine grain sizes as the crypto(tephra) market is volatile at the best of times.
Particularly serious implications for very fine grain sizes as the crypto(tephra) market is volatile at the best of times.
April 3, 2025 at 9:44 AM
Bad news for Heard Island as the US imposes a 10% tariff on its main export - windborne glaciovolcanic tephra. This is viewed as a boost for local Alaskan and Cascadia sources.
Particularly serious implications for very fine grain sizes as the crypto(tephra) market is volatile at the best of times.
Particularly serious implications for very fine grain sizes as the crypto(tephra) market is volatile at the best of times.
New Sinter seminar online!
Dr. Franz J. Meyer (University of Alaska Fairbanks): "NISAR Data at the Alaska Satellite Facility"
Dr. Shadi Oveisgharan (NASA JPL): "Retrieving Snow Water Equivalent Using InSAR in the Next Decade; Counting Down for NISAR"
youtu.be/-HA2eCHajzg?...
Dr. Franz J. Meyer (University of Alaska Fairbanks): "NISAR Data at the Alaska Satellite Facility"
Dr. Shadi Oveisgharan (NASA JPL): "Retrieving Snow Water Equivalent Using InSAR in the Next Decade; Counting Down for NISAR"
youtu.be/-HA2eCHajzg?...
SINTER Seminar 03 April 2025 - Shadi Oveisgharan, Franz Meyer
YouTube video by Snow International - SINTER
youtu.be
April 8, 2025 at 6:48 PM
New Sinter seminar online!
Dr. Franz J. Meyer (University of Alaska Fairbanks): "NISAR Data at the Alaska Satellite Facility"
Dr. Shadi Oveisgharan (NASA JPL): "Retrieving Snow Water Equivalent Using InSAR in the Next Decade; Counting Down for NISAR"
youtu.be/-HA2eCHajzg?...
Dr. Franz J. Meyer (University of Alaska Fairbanks): "NISAR Data at the Alaska Satellite Facility"
Dr. Shadi Oveisgharan (NASA JPL): "Retrieving Snow Water Equivalent Using InSAR in the Next Decade; Counting Down for NISAR"
youtu.be/-HA2eCHajzg?...
Sentinel-2 reveals the surface deformation after the 2025 #Myanmar #earthquake www.cesbio.cnrs.fr/multitemp/se...
April 2, 2025 at 9:04 PM
Sentinel-2 reveals the surface deformation after the 2025 #Myanmar #earthquake www.cesbio.cnrs.fr/multitemp/se...
Before/after satellite images show the displacement along the fault of the 2025 #Myanmar #earthquake #Sentinel2
April 1, 2025 at 3:56 PM
Before/after satellite images show the displacement along the fault of the 2025 #Myanmar #earthquake #Sentinel2
RIP Coriolis force, Clausius–Clapeyron relation, bye bye fluid mechanics and thermodynamics.. rdcu.be/efNNg
End-to-end data-driven weather prediction
Nature - End-to-end data-driven weather prediction
rdcu.be
March 31, 2025 at 2:11 PM
RIP Coriolis force, Clausius–Clapeyron relation, bye bye fluid mechanics and thermodynamics.. rdcu.be/efNNg
Reposted by Simon Gascoin
J'ai modifié mon kit de démarrage destiné aux scientifiques francophones spécialistes du climat, de la biodiversité et de l'environnement en déplaçant les communicateurs et les institutions vers un autre kit.
Si vous pensez que je devrais vous inclure, faites-le moi savoir ! go.bsky.app/LjZgnPy
Si vous pensez que je devrais vous inclure, faites-le moi savoir ! go.bsky.app/LjZgnPy
March 22, 2025 at 10:07 PM
J'ai modifié mon kit de démarrage destiné aux scientifiques francophones spécialistes du climat, de la biodiversité et de l'environnement en déplaçant les communicateurs et les institutions vers un autre kit.
Si vous pensez que je devrais vous inclure, faites-le moi savoir ! go.bsky.app/LjZgnPy
Si vous pensez que je devrais vous inclure, faites-le moi savoir ! go.bsky.app/LjZgnPy
Reposted by Simon Gascoin
Conference season is near.
Dear fellow academics, first of all you shouldn't be flying anywhere for a conference, the climate crisis is real ffs.
Second, DO NOT GO TO THE US unless you are cool with being detained, harmed and potentially deported to Salvadoran prison camps.
So: DO NOT GO TO THE US.
Dear fellow academics, first of all you shouldn't be flying anywhere for a conference, the climate crisis is real ffs.
Second, DO NOT GO TO THE US unless you are cool with being detained, harmed and potentially deported to Salvadoran prison camps.
So: DO NOT GO TO THE US.
March 19, 2025 at 7:47 PM
Conference season is near.
Dear fellow academics, first of all you shouldn't be flying anywhere for a conference, the climate crisis is real ffs.
Second, DO NOT GO TO THE US unless you are cool with being detained, harmed and potentially deported to Salvadoran prison camps.
So: DO NOT GO TO THE US.
Dear fellow academics, first of all you shouldn't be flying anywhere for a conference, the climate crisis is real ffs.
Second, DO NOT GO TO THE US unless you are cool with being detained, harmed and potentially deported to Salvadoran prison camps.
So: DO NOT GO TO THE US.
@hagolleo.bsky.social "a petition signed by 1,683 Sentinel-2 users, urging ESA to extend Sentinel-2A’s operation"
ESA has granted Sentinel-2A a one-year exceptional and temporary extension, delaying its retirement and increasing Sentinel-2 revisit times.
europeanspaceflight.com/sentinel-2a-...
europeanspaceflight.com/sentinel-2a-...
Sentinel-2A Given One-Year Exceptional and Temporary Extension
ESA has granted Sentinel-2A a one-year exceptional and temporary extension, delaying its retirement and increasing Sentinel-2 revisit times.
europeanspaceflight.com
March 12, 2025 at 9:43 PM
@hagolleo.bsky.social "a petition signed by 1,683 Sentinel-2 users, urging ESA to extend Sentinel-2A’s operation"
In this study we show that a single satellite snow depth image significantly improves a snowpack model in a high alpine site (Zugspitze, Germany). This result is based on the evaluation of the simulated gravity signal against superconducting gravimeter measurements. doi.org/10.1029/2024...
Superconducting Gravimeter Observations Show That a Satellite‐Derived Snow Depth Image Improves the Simulation of the Snow Water Equivalent Evolution in a High Alpine Site
Evaluation of a distributed physically based snow model using superconducting gravimetry in a high alpine area
Precipitation scaling based on a single satellite snow depth image significantly imp...
doi.org
March 9, 2025 at 8:39 PM
In this study we show that a single satellite snow depth image significantly improves a snowpack model in a high alpine site (Zugspitze, Germany). This result is based on the evaluation of the simulated gravity signal against superconducting gravimeter measurements. doi.org/10.1029/2024...
Reposted by Simon Gascoin
So that's the beginning of the end for US Old Growth Forests then, prepare for massive biodiversity and carbon loss, here billed as the opposite www.whitehouse.gov/presidential... 🌎
Immediate Expansion of American Timber Production
By the authority vested in me as President by the Constitution and the laws of the United States of America, it is hereby ordered: Section 1. Purpose.
www.whitehouse.gov
March 2, 2025 at 1:33 PM
So that's the beginning of the end for US Old Growth Forests then, prepare for massive biodiversity and carbon loss, here billed as the opposite www.whitehouse.gov/presidential... 🌎
Reposted by Simon Gascoin
Glad to share our paper published in the journal “Science” titled “The Sikkim flood of October 2023: Drivers, causes and impacts of a multihazard cascade.” www.science.org/doi/10.1126/...
January 30, 2025 at 7:19 PM
Glad to share our paper published in the journal “Science” titled “The Sikkim flood of October 2023: Drivers, causes and impacts of a multihazard cascade.” www.science.org/doi/10.1126/...
Reposted by Simon Gascoin
Our new paper in Science (Sattar et al 2025) analyses the causes, process and impacts of the 3-4 October 2023 landslide-triggered GLOF along the Teesta River in Northern India. This was an amazing event - I've provided a summary of the research on the Landslide Blog:- eos.org/thelandslide...
The 3-4 October 2023 Sikkim GLOF
Our new paper in the journal Science analyses the terrible landslide-triggered (GLOF) that struck India late in 2023.
eos.org
January 30, 2025 at 7:21 PM
Our new paper in Science (Sattar et al 2025) analyses the causes, process and impacts of the 3-4 October 2023 landslide-triggered GLOF along the Teesta River in Northern India. This was an amazing event - I've provided a summary of the research on the Landslide Blog:- eos.org/thelandslide...
Reposted by Simon Gascoin
New paper today in @science.org focused on unraveling the chain of events that led to the 2023 Teesta disaster, which resulted in about 130 people either dead or missing in Sikkim, India. Short thread to follow. 🧪⚒️ doi.org/10.1126/scie...
January 30, 2025 at 7:13 PM
New paper today in @science.org focused on unraveling the chain of events that led to the 2023 Teesta disaster, which resulted in about 130 people either dead or missing in Sikkim, India. Short thread to follow. 🧪⚒️ doi.org/10.1126/scie...
Reposted by Simon Gascoin
3 octobre 2023: une crue dévaste la vallée de la Teesta (Sikkim) entraînant la disparition de 130 personnes. Une équipe internationale, conduite par Ashim Sattar @glacier-hazards.bsky.social, décrypte dans Science (doi.org/10.1126/scie...) la cascade de phénomènes qui a conduit à cette catastrophe.
The Sikkim flood of October 2023: Drivers, causes and impacts of a multihazard cascade
On 3 October 2023, a multihazard cascade in the Sikkim Himalaya, India, was triggered by 14.7 million m3 of frozen lateral moraine collapsing into South Lhonak Lake, generating an ~20 m tsunami-like i...
doi.org
January 31, 2025 at 8:47 AM
3 octobre 2023: une crue dévaste la vallée de la Teesta (Sikkim) entraînant la disparition de 130 personnes. Une équipe internationale, conduite par Ashim Sattar @glacier-hazards.bsky.social, décrypte dans Science (doi.org/10.1126/scie...) la cascade de phénomènes qui a conduit à cette catastrophe.
Blooming Lake Prespa and snow covered Baba mountain (North Macedonia) #Sentinel2 27 Jan 2025
January 29, 2025 at 11:39 PM
Blooming Lake Prespa and snow covered Baba mountain (North Macedonia) #Sentinel2 27 Jan 2025