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

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

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 😨

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

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 🙏

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' 🧊🥶

Well done! Good job! Awesome, but a little bit weird... youtu.be/Rvd_3aueuPA

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

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) 🧊⏱️

Ski lift operators are commiting what amounts to environmental crimes! 🤬 Since 2024, SATA which operates Deux Alpes ski area has levelled Mont De Lans Glacier and filled in a 2000 m² new glacial lake that had appeared around 2010... without any authorisation! 📷 GoogleEarth 1/

From Chamonix to the Mer de Glace (Géant seracs) with raw LiDAR data from IGN viewed with PurpleGeo 😲 🤩 6 Billions of points. Zero textures Raw LiDAR, instantly understandable. Source: Alex Ferrier

Early morning today towards Tour Glacier - now barely visible from the valley - from around Tré le Champ! 😍❄️ 📷 @lomdumtblanc.bsky.social

UTTERLY SURREAL LOW ANGLE GLACIER SLIDE!! 😮😱 On Saturday at 11:00 am, a 2 km-long, 25 m-high, and 150-200 m in width section detached off the Ismoil Somoni Glacier (Tajikistan) and slid down the gorge! 🧊🌊 asiaplustj.info/en/node/354309 📽️ via @volcaholic1

Argentiere Glacier this morning after small snowfall last night! ❄️ Pic @lomdumtblanc.bsky.social

Mont Maudit (4 465 m) tonight! 🤩

Bossons Glacier is burning tonight! 🔥

Aiguille and Dôme du Goûter tonight! 😍

This is the only tree I found embedded in a moraine that shows a pre-existing cut mark! 🤔🌲⛏️ This means that this tree was felled by people and then (shortly afterwards?) buried by the glacier during a major advance (LIA)! 🧊🌊 Obviously, this can only happen in the Chamonix Valley (Bossons here)! ⛪

Sanding a 3800 yr-old Cembran pine cookie from Mer de Glace at sunset! 🥰🌲💍

What trees can tell ? 🌲💍🥰 This small cembran pine found in the Argentière Glacier lateral moraine has likely grew in a steep slope (avalanche couloir) and had a perturbated life, struggling to maintain apical growth (orange compression wood, R)! 💪 1/

📣 Find my interview today on Rhône FM here! 👇📻 Many thanks to Oriane Binggeli for her interest in the project! 🙏 www.rhonefm.ch/valais/fonte...

📣 Tune in tomorrow to Rhone FM to hear me all day long! 📻 You can listen to excerpts from my interview about subfossil wood and glaciers, and why recovering them is so important today...and without delay! 🧊📈⌛ Many thanks to Oriane Binggeli for her professionalism and interest in the project! 🙏🙏🙏

Tré-la-Tête Glacier 1990s | 2025 Demise of the most 'secret' (fact already emphasised by Whymper in 1909!) large glacier of the Mont Blanc massif! 🏔️ 🧊 The icefall no longer exists and most of the left tributaries have broken off! 🔥 📷 Cesare Balbis and Lauriane Miara

Imagine Tré-la-Tête Gacier in the 'Swinging Thirties' when first glaciological work began there! 🧊⏳⛏️ So moving to see these beautifully dressed early glaciologists! 🎩 No Gore-Tex, but gender balance! 🤍⚖️ 📷 Claudius Bernard

Want to acquire such a priceless piece of our natural heritage? 🥰 This is a subfossil spruce from late Roman period that comes from Bossons Glacier in Chamonix! 🌲⌛ What makes it special? 💚 - Spruce is pretty rare in moraines - Precisely dated to early summer 253 CE! wemakeit.com/projects/gla...

4°C at Observatoire Vallot (4365 m asl) on Mont Blanc on the 19th Sept. ! 🔥😱 This was unbelievable in full summer few decades ago, now this occurred regularly outside summer! 📈🥵 Data: IGE meteo station via X. Cailhol

Tour Glacier this morning! 🥰🧊 The contrasts of autumn are the best! 😍 Chardonnet and Aiguille Verte overlook snow-free ice bodies 🔥 📷 @lomdumtblanc.bsky.social

Glacier subfossil wood cookie of the day! 🥰🌲💍 Argentière Glacier lateral moraine Oct. 2024! 🧊 Don't miss a unique opportunity to acquire one of those exceptional samples, by helping science to find the last ones before it is too late...! ⌛🔥 wemakeit.com/projects/gla...

📣📣 Call For Donations! 💰💰 I am raising funds to finance the 2025 'glacier subfossil wood' field campaign! Do you want to continue hearing tales about glaciers and trees? 🧊🌲💍 I need your help! 🤍 To learn more: wemakeit.com/projects/gla... 🙏🙏 Please share it widely! 🙏🙏

Unusual and really impressive >12 000 m3 limestone rock avalanche at Sixt-Fer-à-Cheval in the Méridienne - Pas Noir area yesterday! 😱 Source Grand Massif/Haut Giffre IG

Bossons Glacier 2022 | 2025 These 3 years show the most impressive glacier collapse ever! 🧊😱 The Mont Blanc massif and Chamonix icescape will never be the same... 🔥😭 Glaciers are now completely out of context with the climate zone in which they are located! 🌡️📈 📷 MeteoValledAosta

'Forage d'un piquet de fusion au profil bleu' 2 Sept. 1930 Allouard Vintage glaciology! ⏳❄️ Installation of ablation stakes at the Tré la Tête Glacier using a bucket of hot water in lieu of steam ice drill! 🔥🧊💧 Source @GallicaBnF @matthias-huss.bsky.social @landervt.bsky.social

Sunrise on Mont Blanc this morning! 🤩 Contemplating the Bossons Glacier, once the marvel of the Alps, is now painful... 🖤 📷 @lomdumtblanc.bsky.social

Bossons, Miage and Lée Blanche Glaciers Sept. 2022 | Aug. 2025 21st century glacier collapse during a 3-yr period including 2 record year for ice loss 🔥 Pics shot during a test for a repeat-photography app by OGI ⏳ 📷 Oregon Glacier Institute

'Tourism is an extractive industry, ep. 5347' ⛏️ After months of digging, a 65 m-long tunnel perforating Aiguille des Grands Montets (nearly 3300 m asl) has just been completed ⛰️🧀 Men would be bored if they did not have Nature to destroy! 🙃 🎥 via Mathieu Dechavanne (Cie Mt-Blanc)

Argentière Glacier 2014 | 2025 Worst decade ever for Alpine glaciers! 🔥 2014 was the last year in which some positive mass balances were recorded in the Alps, as you can see from nice snowpack at the end of July! (Dates: 24th July vs 9th August) 🙏 @lomdumtblanc.bsky.social for 2025 pic

Glacier du Mont Ruan.

The striking spectacle of the ice revealing itself when the mist finally lifts, unexpectedly! 🌥️ Those thousands of sparkling crevasses 🧊 That vivid sensation of flow! 🌊 Marks your entire life. ~ Saleinaz, 16 years ago, exactly ~

Taconnaz Glacier from La Jonction path 2008 | today Red dot marks the same location! (19th sept. 2008 / 24th Aug. 2025) @ABettmeralp for today's pic! 🙏

Mont Blanc (4806 m) and Dôme du Goûter (4304 m) from La Jonction (2589 m) this morning! 🥰 This place which used to be an immersion in the 'glacier realm' accessible from a hiking path is less and less 'icy'... 🧊🔥 📷 @ABettmeralp

Mont Blanc from Col de Balme Last night | c. 1810 Surely one of the best Mont Blanc profile! ⛰️ Which will soon be missing its long icy tongue stretching towards the valley... 🧊👅 📷🖌️ @chesnel.bsky.social and Jean-Antoine Linck 🙏

2022 was the most detrimental summer for glacier loss ever! 🔥😱 It foreshadows what our summers will be like from now on, as 2025 looks almost similar... 😭 Here is a 9-months timelapse of Mer de Glace (Dec. 2021-Sept. 2022) ending with those terrible melt rates Via laplaceduvillagetv

Glowing red sunset due to smoke from iberian wildfires, on the bare ice of Tour Glacier seen from Albert 1er hut 🧊🔥 🎥 @chesnel.bsky.social 🙏

A breathtaking view of Mont Blanc massif (Verte, Jorasses and Mt Blanc) this morning from the 'Mont Blanc des Dames' (apologise for this misogynistic label!), a former name for Mont Buet (3096 m) 😍 Last remains of Aiguilles Rouges northern ice bodies at foreground 🧊 📷 @lomdumtblanc.bsky.social

51th heatwave in France since 1945, and second one this summer...! 🥵 Likely one of the most detrimental summer ever for glaciers! 🧊🔥 Mer de Glace is losing more than 10 cm/day during this Aug. heatwave! That's...just...INSANE!😱 www.franceinfo.fr/environnemen... 📷 Webcam Mer de Glace today

Ice thickness loss at this place on Mer de Glace exceeds 10 cm per day since the August heatwave began! 🔥 📈 Since May, the cumulative loss is around 8 meters!

Constant rockfalls on north face of Col du Plan today! 😱 🎥 Philippe Batoux

Large rockfalls at the moment in the north face of Aiguille du Goûter (3863 m)! 😰 Iso 0°C at 5100 m today! 🥵 📷 @lomdumtblanc.bsky.social