Melaine Le Roy
@subfossilguy
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Assiduous dendroglaciologist, moraine lover, wandering geomorphologist, living in the Holocene, climate (and eco-) anxious, @edytem_fr
Joined January 2020
Still at #merdeglace for Day 6 of #7daysoffieldwork to celebrate 10 years of sampling and ~400 subfossil wood samples retrieved from this single moraine ! 🌲💍 #treerings #fieldwork #chamonix
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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... 🥰🌲💍 Below are sampling pics of excavated trees with Mt Rainier in the background 🏔️ https://t.co/YY6aIyJ65k
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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 m of ice left here. In some places, up to 18 m have melted since 2003 only! 🔥 Source: Xavier Cailhol 🙏
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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! 🌊
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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
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Since 2000, hospital prices have soared by over 250% – 3x the rate of inflation. Why? Mergers and consolidation give them more power to set prices. It’s time to hold hospitals accountable for rising health care costs. Learn more.
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A clear path! 🤩 When the wood is 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 'Late Antique Little Ice Age' 🧊🥶
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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 🤬
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This view pre-dates the 1840 Ahora Gorge catastrophe, which profoundly changed the appearance of the northern slope of the mountain! Worth read: https://t.co/qvaZ9xjWPs
https://t.co/ePXYpjEl64
https://t.co/q2s192lDF2
https://t.co/lfQSLlyDqj 2/
muchbetteradventures.com
The storm cleared for a moment, and from the blizzards of Kazbek, Friedrich Parrot looked on at the silvery-crown of Mt Ararat, said to be the resting place of Noah's Ark...
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'Travelers in the foothills of the Caucasus' Nikanor Chernetov 1849 Early view of the ice-capped Mount Ararat/Ağri Daği (5137 m asl), seen here from the N by Chernetov the very year Friedrich Parrot made the 1st ascent (1829)! 🏔️ But painted in studio 20 years later! ⌛🎨 1/
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Built by the team who brought you Baldur's Gate 3, Larian Studios unchains its ambitions to bring you an RPG with greater breadth & depth than ever before. Divinity - The gods are silent. Rivellon bleeds. New powers stir.
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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.
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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)
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But let's assume classifying weather stations by their surrounding population density is at least somewhat useful for eliminating biases. How does the global land average from the 19% of very rural stations compare to the average of all stations? They are extremely similar. 5/
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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
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A historic December warm spell is about sweeping Europe. Exceptional mild air will cross all Europe from SW to NE with Minimums locally >15C and >10C even in some Scandinavia spots ! Expect Hundreds if not thousands of records allover. Only Italy won't see any exceptional warmth
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Approx. 10,000 m3 for the Dent de Crolles rockfall👇 https://t.co/oykbShQFBj
ledauphine.com
Un vaste éboulement de 10 000 m³ s’est produit vendredi 28 novembre à la Dent de Crolles, sur la commune de Saint-Pierre-de-Chartreuse. Après ...
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
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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! 🥰
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Train smarter, store freely - no egress fees on Cloudflare's R2 object storage.
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Marinelli Glacier (Cordillera Darwin) 1913 | 2024 Another mind-boggling comparison! 🧊🔥 Marinelli Gl. has lost >15 km during this period! 😲 Mte Shipton (2568 m) at the background is highest peak in CD 🏔️ 📷 1913: pano made of 5 pics by Alberto de Agostini 📽️ 2024: C. Donoso
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Heatwaves are deadly! 🔥☠️ This graph shows daily deaths for a region which is (was!) arguably one of the coolest in France in summer, Bretagne! The red curve shows the mortality linked to the 2022 heatwaves (totalling ~200 deaths), when regional record was broken (41.6°C!) 🥵
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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! 🧊🔥 LIA max is tangent to coastline 🌊 See this paper: https://t.co/c2IgtFwt0j GIF: Amir Hamedpour
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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): https://t.co/cLES8gSMma
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Recently, @BerkeleyEarth expanded our temperature database by integrating the HCLIM data set. https://t.co/ee9zg9dgFW The additional data rescued by HCLIM helps improve early reconstructions, but doesn't fundamentally change the large uncertainties due to sparse sampling. 1/
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