[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

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...

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/...

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.

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

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.

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...

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...

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.

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?...

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

RIP Coriolis force, Clausius–Clapeyron relation, bye bye fluid mechanics and thermodynamics.. rdcu.be/efNNg

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

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.

@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...

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... 🌎

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/...

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...

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...

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

💙🔵🧊❄️An oustanding frozen heart shared between Ontario and Michigan: as of Jan 27 LakeSaintClair has iced over almost completely, resulting as a perfect piece of EarthArt⬇️ Latest #Landsat 9 image of Jan.27 after Storm Enzo

Shadow and light in Antarctica. This time with some penguins 😊🔎🐧🐧🐧 Image taken by Sentinel-2.

Kathmandu Post discusses warm dry winter, which has led to high glacier snow lines around Mt Everest mid-January 2025 averaging 5800-5900 m, replay of high snow lines winter 2024. @prajjwal.bsky.social @sgascoin.bsky.social @drmiriamjackson.bsky.social #glaciology kathmandupost.com/weather/2025...

Apport des observations spatiales pour le suivi du manteau neigeux et ses impacts (séminaire en ligne) www.college-de-france.fr/fr/agenda/se...

Insightful paper by Emilie Fox et al. "managing glaciers as a resource may limit, or even undermine glacier protection efforts" doi.org/10.3389/frwa...

Hydrology Paper of the Day @sgascoin.bsky.social suggested by @hydrologywsl.bsky.social on Sentinel-2, Pléiades DEM datasets, and LIDAR IceSAT-2 products to characterize reservoirs in the Telangana State (South India): data fusion, water storage and hypsometric relationships.

"What remote sensing products can be used to better quantify the water stored in hundreds of thousands Indian Small Reservoirs"? New application of high resolution Pléiades DEMs by Pascal, Ferrant et al. doi.org/10.1371/jour...

Pour caractériser les conditions hydrométéorologiques lors de la crue torrentielle qui a frappé la Bérarde en juin, j’ai analysé une nouvelle série de cartes d’enneigement qui couvre la période 1984-2024 (104 km²) .. www.cesbio.cnrs.fr/multitemp/ev...

For Steffen Glacier, Chile I noted on 10-7-24 a rift had formed that would lead to large calving event. This happened by12-5, iceberg Z1 (1.1km2) and Z2 (0.6 km2 +melange. Retreat of calving front ~2.5 km. @sgascoin.bsky.social @iceybethan.bsky.social #glaciology glacierchange.blog/2024/04/21/s...

"Data will be made available on request."

Recent Pléiades satellite image of the Khumbu icefall shaded by Nuptse peak, Nepal Himalaya

J'ai fini de générer mon MNT LidarHD des Pyrénées à 1m de résolution.. 10 milliards de pixels valides quand même 🤩

Study provides thorough examination of current precarious state of Pyrenean glaciers, "..area change between 2020 and 2023 is -94.8 ha, representing a -39.8% decrease of the glaciarised area from 2020 to 2023" That is nearly 10% area loss per year with 2.5 m of average thinning during same period.

Pyrenean glaciers are disappearing fast: state of the glaciers after the extreme mass losses in 2022 and 2023 - by Eñaut Izagirre and colleagues doi.org/10.1007/s101...

Passionnant historique : "Les plateformes de glace d’Antarctique : De leur découverte à leur désintégration" lameteorologie.fr/issues/2024/...

Je viens de télécharger et traiter 1.2 To de nuages de points LidarHD pour générer un MNT du département du Var. L'opération n'a pris qu'une demie journée grâce à cet outil github.com/cusicand/lid... de Diego Cusicanqui. Vivement la mise à disposition du MNT LidarHD officiel à l'échelle nationale..

Great picture of the Etretat ice cliff in western France (source Météo-France - Rémi Santerne - remistn Instagram)

Check out our preprint in discussion "Trends in the annual snow melt-out day over the French Alps and the Pyrenees from 38 years of high resolution satellite data (1986–2023)" doi.org/10.5194/egus...

Respectfully (I think the world of you as you know) science is a social construct - it is done by people. We may use objective methods, but our questions are human and therefore full of all the good AND bad encompassed within us.

Folks! I intend to write a collaborative opinion paper with about 30 coauthors.. what tools should I use? I'm trying authorea and it looks nice. Any other tip? How to organize the writing? #academicchatter #AcademicWriting

Landsat and Sentinel-2 are some of the most reliable and consistent EO satellite platforms out there. Yet the data still hides some fascinating quirks! 🛰️ The graph below shows changes in local satellite overpass times since 1986 across Australia:

Heavy rains and hail wiped the white lime on the greenhouses near Almeria

Mountain Snowfields Are Turning into Green Oases botany.one/2024/10/moun...

a lot of mud was discharged into the Mediterranean Sea during the Valencia flood (Landsat, Oct 30)