Love this photo, perfectly capturing the tense fieldwork in these unique locations, perched 200 metres above the valley floor, at the top of a steep (>50°) and frightening gully! 🏔️ Operating the chainsaw with one hand...on one foot! 🔥 Can you spot the subfossil log? 🌲 Mont Miné's days... 2017 🥰

On 20th Dec. in the morning, a huge aerosol caused by the break-up of a serac from the Aiguille Verte summit ice cap ran down the Cordier couloir and ended up on Argentière Glacier! 😮🧊❄️ 📽️ Thomas Lebas

Snow at mid elevation will no longer be a thing of the 21st century! ❄️😢 Andermatt (UR, central Swiss Alps, 1500 m asl) 22 Dec. 2025 ... 7 cm! 😱 Via @msaenger.bsky.social

Resilience before the word even existed! 🤍 Somewhere in the Alps, 8,200 years ago, a larch tree was injured and healed. Growth rings draw it 🖌️

Furgg Glacier and Matterhorn 1905 | 2022 📷 @glacionaut

I've put together my predictions for 2026 and 2027 temperatures over at The Climate Brink. I expect 2026 will likely end up similar to 2023 and 2025 at ~1.4C, while 2027 will likely be considerably warmer (conditional on El Nino): www.theclimatebrink....

Argentière Glacier front June 2025 Overview of a dying (former) ice front of one of major Alpine glaciers during last June crazy heatwave! 🧊🔥 The dead ice lowest point is ~1650 m and the ice cliff at the background - which hardly feeds it anymore - is ~2200 m asl 😨

Spectacular frontal view of Argentière Glacier 🧊🔥 July 2024 Argentière Gl. spans 3600 to 2100 m (ice cliff below 👇) and was 11 km² in 2022 See this recent paper to find out how Saharan dust influences its mass balance ❄️🏜️ egusphere.copernicus.org/preprints/20... 📷 Sean Gallup/Getty images

Glaciar Piedras Blancas and Cerro Chaltén 1931 | 2025 Iconic ! 📷 De Agostini and Ty Lekki

There are 211,500 glaciers on this planet and we'll lose most of them this century because of human emissions! 🧊🔥 The peak of glacier extinction will occur 2040 to 2055! 📈 But each fraction of degree matters! 🌡️ Some of them can be saved! 🙏 @landervt.bsky.social www.nature.com/articles/s41...

Mont Blanc seen from Combloux today! 🏔️🤩 📷 @lomdumtblanc.bsky.social

Spectacular recent photos (12th Dec.) of the landslides that followed Hubbard Gl. M7 earthquake on 6th Dec. 2025 ⚡ Here is mainly depicted Mt King George with dust still rising as debris ran more than 1500 m down towards the glacier 🏔️🧊 Some deposits are over 1 km wide! 😲 📷 Yukon Geological Survey

French glaciers have lost more than 4% of their volume in 2025! 🧊🔥 According to #Glacioclim network (glacioclim.osug.fr), 2025 ranks 3rd most deficient mass balance ever recorded, after 2022 and 2023! 😱 Via @liberation.fr www.liberation.fr/environnemen...

My lab at @univbrest.bsky.social hitting headlines again! A giant fishweir made of 62 monoliths and measuring 120x20m, has been discovered near Sein island (Brittany). It's the largest underwater construction in France, and it was built by Mesolithic hunter gatherer 🤯 #PaleoSky #MegalithMonday🏺

Subfossil spruce Bossons Glacier 80-253 CE Tree buried during an early glacier advance post Roman Warm Period 🧊🌲💍 Repeated phases with compression wood show this tree lived in a dynamic environment (avalanches, landslides?) ❄️💧 #ILoveTreeRings

Aiguille Verte and Mont Blanc from Arolette today! 🤍 📷 @lomdumtblanc.bsky.social 🙏

Cold War insanity! 😱 In 1965, a plutonium-packed generator disappeared on one of world’s highest mtns - Nanda Devi (7,816 m) - in a U.S. covert mission to spy on China! It’s likely still buried in a glacier feeding the Ganges - a river that supports ~600 M ppl! 😲 www.nytimes.com/interactive/...

A typical Stone Pine (Pinus cembra L.) 'ringscape' 🥰🌲💍 - Narrow latewood - large resin canals (creating those 'bumps!) - More complacent growth than larch We are here ~8,300 years ago above 2,000 m asl in the Alps 🏔️🧊 Average ring width ~0.3 mm 🔬

New study found the largest lahar of the last millennium occurred at Mt Rainier (4.392 m, WA) at the end of the year 1507! 🏔️🌊⌚ Wonderful tree rings... 🥰🌲💍 pubs.geoscienceworld.org/gsa/geology/...

Aiguille du Midi (3842 m) 1957 | 2025 Upper 'Mallory Glacier' (N aspect) and Aig. du Midi from the east! Remember that we are here “on top” of Alpine glaciers! Only 5 to 17 metres of ice left here. In some places, up to 18 metres have melted since 2003 only! Source/data: Xavier Cailhol 🙏

Last six years before glacier impact! 🧊😱 In the intimacy of this larch tree buried by Tschierva Glacier in 7623 BCE (i.e. ~9650 years ago)! 🌲💍 Note the significant growth reduction five years before the tree death! 🌊

Zermatt and a random Alpine peak today at the very dawn! 🏔️🌄 From Milano-Paris commercial flight ✈️ You may feel like it's winter, but what we're seeing here is unworthy of December, and flying is to blame! Via MeteoValledAosta

Have you ever considered growing a glacier? 🧊 That's what glacier marriages are about! 🌱 To learn more, read the great story written by @glacioverse.bsky.social about this tradition from Baltistan (Pakistan) 🏔️ medium.com/@tirthankarg...

A clear path! 🤩 When the wood is full of resin and sticky, sanding doesn't allow the tree rings to be seen clearly enough 🧐 It is then necessary to make a path with a razor blade filled with chalk 🔬 Mer de Glace stone pine (300-500 CE) killed during the so-called 'Late Antique Little Ice Age' 🧊🥶

Here we are! What fascism and state lies do to Science and Truth...🤮 Check the US Environmental Protection Agency website about the causes of climate change 🧐 2024 vs 2025 🤬

Make the mountains shake! 🏔️🔥 Each new whitish area on today's Sentinel image below is a landslide triggered by the Hubbard Glacier M7 earthquake (Alaska) on Dec. 6th! 😲 Mostly ice, but also rockslides! 🧊🌊

We have updated the Hubbard Glacier Earthquake that happened at 11:41 am to a magnitude 7. More than 20 aftershocks over magnitude 3 have followed the mainshock so far, with the largest aftershocks ranging from M4 to M5.1.

This is the current USGS landslide potential maps from the M=7.0 #Hubbard #Glacier #earthquake, which occurred in the last few hours. It shows high landslide potential in the area of Mount Vancouver. The first set of satellite images are going to be interesting. earthquake.usgs.gov/earthquakes/...

'Travelers in the foothills of the Caucasus' Nikanor Chernetov 1849 Early view of the ice-capped Mount Ararat/Ağri Daği (5137 m a.s.l.), contemplated here from the north by Chernetov the very year Friedrich Parrot made the 1st ascent (1829)! 🏔️ But painted in studio only 20 years later... ⌛🎨 1/

Vergara Glacier (Cordillera Darwin) 1928 | 2024 This glacier has retreated 3 km over the last century, date on which it still reached the De Agostini fjord 🧊🌊 📷 1928: Gunther Plüschow (from 'Feuerland' vessel) 2024: Cristian Donoso (from kayak)

Human induced freezing height! 📈🔥 Number of days per summer with maximum zero degree limit above 4000 (light red) and 5000 m (dark red), derived from radiosondes in Payerne (CH) Imagine the consequences for glaciers and permafrost! 💧 Source: DWD/MeteoSwiss/GeoSphere Austria

Approx. 10,000 m3 for the Dent de Crolles rockfall👇 www.ledauphine.com/environnemen...

This is a larch tree killed 8,175 yr ago by a glacier advance in the Alps - likely the regional expression of the well-known '8.2 ka event'! ❄️🧊⏱️ I could never tire of handling samples like these! 🌲💍 Pure Natural Art from the Holocene! 🥰

Marinelli Glacier (Cordillera Darwin) 1913 | 2024 Another mind-boggling comparison! 🧊🔥 Marinelli Glacier has lost >15 km during this period! 😲 Monte Shipton (2,568 m) at the background is the highest peak in CD 🏔️ 📷 1913: pano made of 5 images by Alberto de Agostini 📽️ 2024: Cristian Donoso

Heatwaves are deadly! 🔥☠️ Here are daily deaths for a region which is (was!) one of the coolest in France in summer, Bretagne! The red curve shows the mortality linked to 2022 heatwaves (~200 deaths), when regional record was broken: 41.6°C! 🥵 See toll difference with the more typical 2020 year!

Breiðamerkurjökull (SE Iceland) 1984 | 2025 6 km frontal retreat over 40 years for the 4th largest glacier in Iceland (900 km² in 2010), an outlet of the Vatnajökull ice cap! 🧊🔥 The LIA max is tangent to coastline 🌊 See this paper: www.researchgate.net/publication/... GIF Author: Amir Hamedpour

Maladeta Glacier 2025 Mass Blance! 🧊🔥 8th worst year, out of the 34 measured (since 1992)! Thickness reduction of 189 cm in average! 📈 Full report (@CH_Ebro, ERHIN programme): chebro.es/documents/20...

This is the largest known retrogressive thaw slump in the world (Yakutia)! 🧊🔥 It exposes a remarkable sequence of Ice Age permafrost that record interaction of colluvial/eolian/periglacial processes on a hillslope episodically forested during last 650 ka! 😲 onlinelibrary.wiley.com/doi/full/10....

A giant low angle glacier detachment (40 M m3) occurred on 1st Nov. 2022 in the remote Kunlun range (Tibet, 90.869° E, 35.969° N) and was discovered only 2 years later! 😲🧊🌊 Before collapsing the glacier reached speeds of up to 46 m/day! ⚡️ Must read! 🔥 www.researchsquare.com/article/rs-5...

Drone footage of the Blatten deposit shot on 12th November! 😲 🎥 epfl_lhe_lab

The A294 cave contains the world’s known oldest firn cave deposit, 6100 year old! 🧊🦇 Ice stratigraphy suggests unprecedented melting conditions since ice began to form! 🔥 'We encourage the scientific community to study these archives before they are lost forever' tc.copernicus.org/articles/19/...

Dreamy snowscape from the slopes of Mont Buet (3,096 m asl) towards Aiguille Verte, Grandes Jorasses and Mont Blanc today! 🏔️🤩 📷 @lomdumtblanc.bsky.social 🙏

Yes, there are conifers in Greenland! 🌲 500 yr-long Juniperus tree ring-based temperature reconstruction with oldest living shrub 367 yo! 💪 Striking here: 1/3 of corpus is from archive (collected end of 19th c) Highlights importance of reanalysing old samples using modern analytical techniques! 👏

Impressive rock avalanche on the Dent de Crolles (2062 m asl) in the Chartreuse Massif, French Prealps yesterday 😲 Release area ~1800 m asl 📷 Sylvain Thiabaud

A serac broke off high on the steep Ultar Glacier and the avalanche reached the Hunza Valley, covering Karimabad and surroundings with snow and dust! 🧊❄️😱 Ultar Sar (7,388 m) is the peak at the background right! 🏔️ 🎥 karimiehunzai

I just tree ring dated this large stone pine cookie sampled in 2024 below the Argentière Glacier lateral moraine 🌲💍 It dates the Bronze Age Advance Period of this glacier to 1553+ BCE, which is conform to other calendar dates we have in the Alps at ~1550-1540 BCE (Mer de Glace and Gepatsch) 🧊⏱️

The disappearance of the winter kingdom! 🧊❄️ Number of days without thaw in Zurich since 1882 🥶 20th century average: ~30 1963: 56 ! 📉 2025: 4 ! 📈 Via Simon Scherrer Data @meteoschweiz.ch

Striking animation showing the magnitude of glacier collapse since ca 1900 in the Alps! 🧊🔥 All the retreat you see here is caused by human activity, and it will only stop when the last cubic metre of ice has melted! 📈💧 📷 Photos: @glacionaut 🎥 AI Animation: @flashologo

The symbol of Juneau (Alaska), #Mendenhall Glacier has officially receded from the lake this november! 🧊🔥 After more than a century of calving, it is now entirely grounded! The ice was still abutting the rocky outcrop from where the first pic is taken only 5 yrs ago! www.ktoo.org/2025/11/25/m...

Tree rings are amazing! 🌲💍🥰 Here is a 600 yr-old Siberian pine cross section showing no less that 7 scars on the tree side facing the rock cliff upstream! 🔥 All the scars are dated to the year (or season) and are used to build chronicles of different hillslope processes! 📅 1/