Melaine Le Roy
banner
subfossilguy.bsky.social
Melaine Le Roy
@subfossilguy.bsky.social
Assiduous dendroglaciologist, moraine lover, wandering geomorphologist, living in the Holocene, climate (and eco-) anxious, @edytem.bsky.social
https://www.researchgate.net/profile/Melaine-Le-Roy-2?ev=hdr_xprf
Pinned
Aletsch Glacier forefield is so gigantic that fieldwork is demanding there!
Today was maybe one of the hardest working day ever...
Took me 3h40 to get back to Belalp with 40kg (rope, chainsaw, wood)... 😫
Superb aerial footage of Zanskar mountains (Ladakh, India)! 🤩

The accumulation area of the mighty Drang Drung glacier (largest gl. in Zanskar with ~70 km²) is visible at foreground 🧊

Nun-Kun massif (7,135 m) in the distance! 🏔️🏔️

Nanga Parbat (8,126 m) on the horizon!

Via @Kyangs_Thang 🙏
November 20, 2025 at 5:45 PM
Iran is facing its worst drought since at least six decades! 😱🔥💧

As a result the iconic Damavand (5,609 m asl), Iran's highest peak, was snow-free at mid-autumn, which appears to be unprecedented! ❄️😰

This stratovolcano had a 3.4 km ice cover in 2002... likely gone today! 🧊 📈

📽️ @IranIntl_En
November 20, 2025 at 1:06 PM
Cerro Kruger and Monte Steffen (3,300 m background) and the front of Glaciar Mellizo Sur, 3 weeks ago (Bernardo Ohiggins NP, Chile)! 🧊🏔️🤩

Bring me there please! 🥰

Via PatagoniaVertical / IG
November 20, 2025 at 10:21 AM
Imagine,

Passing in front of Morteratsch Glacier in the 1860s like Adolphe Braun here... 🧊 📷

At that time, it was at its Little Ice Age maximum extent!

Imagine that no AGW has occurred since then 🏭

The glacier would not have lost 3.3 km, but likely only one third... 📉

Imagine! 🥰
November 19, 2025 at 7:42 PM
Acceleration of the retreat of Grande Glacier since 2023! 🧊🔥

Grande Glacier is the iconic glacier east of the Cerro Torre! 🏔️

Recent variations show its retreat rate has increased since 2023, quadrupling the values of previous years! 😰

www.researchgate.net/publication/...
November 19, 2025 at 7:11 PM
Forni Glacier (Alta Valtellina)
2005 | 2023

Once - not so long ago - it was the largest glacier in Italy...! 🧊💪

Now it has split in three parts, as the three tributaries quickly retracted! 😰

Source:
www.youtube.com/watch?v=9Gv5...
November 19, 2025 at 1:12 PM
Great documentary about climate change impacts on glaciers in italy and beyond! 🧊🔥

With cryosphere scientists Riccardo Scotti, Barbara Delmonte and others... 🙏

www.youtube.com/watch?v=9Gv5...
November 19, 2025 at 12:44 PM
1,019 glaciers have disappeared since 1973 in Switzerland! ✝️

1st nationwide assessment of vanished glaciers:
>40% of the glaciers inventoried in 1973
~13% (47±3 km²) of total glacier area loss! 🧊🔥

But, as it is based on the latest inventory (from 2016), the actual figures are far much higher! 📈 😰
November 19, 2025 at 12:05 PM
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/
November 17, 2025 at 1:02 PM
The Arctic as we knew it is disappearing right in front our eyes... crazy warm anomalies up to ~20°C! 😱

Do you see the cold anomalies that (according to climate denials) counterbalance the warm ones?

No, because they hardly occur...

Via @weatherprof.bsky.social
November 16, 2025 at 11:13 PM
When you read messages from climate sceptics denying the anthropogenic origin of global warming, ask yourself what lies behind them! 🤡

www.theguardian.com/environment/...
Exxon funded thinktanks to spread climate denial in Latin America, documents reveal
Texas-based fossil fuel company financed Atlas Network in attempt to derail UN-led climate treaty process
www.theguardian.com
November 16, 2025 at 10:31 PM
4.5 m thickness loss! 🧊🔥

This is what Adamello Glacier - the largest Italian glacier - has lost during last summer at this ablation stake located around 2900 m asl! 😭

Data: C. Casarotto (Museo delle Scienze di Trento)
📽️ M. Andrea Teti
November 15, 2025 at 2:57 PM
Limestone extravaganza in Diablerets! 😍

Enjoy Tsanfleuron ('flowery field'), one of the last karst glacier in the Alps, which has a nice feature: feeding both Rhine and Rhône with meltwater! 🧊💧

Check the diffluence towards Sex Rouge, first ice freed in 2022!

📽️ Oct. 2025 (photogrammetry by CREALP)
November 15, 2025 at 1:31 PM
Scandinavian ice patch archaeology is so fascinating! 🥰

In October 2024 was first spotted a 1500 yr-old (likely before the 530s CE cold event) reindeer trap system at the retreating margin of a small ice patch on the Aurlandsfjellet mountain plateau!

archaeologymag.com/2025/11/1500...
November 15, 2025 at 12:10 PM
From now on ppl will start sayin:
"next week is going to be cold, normal, it's winter!"

But this will be NOTHING compared to the warm anomaly we just lived!

2025 in F:
676 hot monthly records
vs
30 cold...

Now dare to tell that the two “balance each other out”

Graph @sergezaka.bsky.social
November 14, 2025 at 7:43 PM
SW quarter of France this morning experienced Tmin of 17 to 23°C ! 😱

Yes, some 'tropical nights' in November! 🥵

This is far more than what we can normally expect during the afternoon mid-november in these regions... insane!

Map: @infoclimat
November 14, 2025 at 7:13 PM
Aurora Borealis over the deepest ice in the Alps two days ago! 😍

This beautiful scene can't hide a crazy warm anomaly!

0°C at Konkordiahütte (2850 m asl) in the middle of the night in November...
Surreal! 🥵
November 14, 2025 at 3:28 PM
The southernmost glacier in Norway is about to extinct soon! 😰

Breifonn was not exactly a small glacier at the end of the LIA (6 km²).
But only scattered patches totalising 0.15 km² remain today, meaning disappearance in the next few years... 😱

www.researchgate.net/publication/...
November 14, 2025 at 11:41 AM
Zermatters are really working hard to destroy their land! 😭

After Gorner dam, digging Theodule gl. and excessive cable cars, introducing...

A 260 m-high tower! 😲

'to fix the housing shortage caused by tourist pressure' 😂

Wait, have you thought about regulating this unrestrained tourism?! 🤔🤬
1/
November 13, 2025 at 9:32 PM
Crazy mid-November snow melt episode in the Pyrenees! ❄️🔥
Tourmalet: 2115 m asl 🏔️

This foreshadows what we will soon experience:
Winter heat waves so strong that they could damage the entire snowpack! 😱📈

📷 @meteopyrenees.bsky.social
November 13, 2025 at 8:53 PM
Reposted by Melaine Le Roy
Never forget: At breakneck speed we are leaving the stable Holocene climate in which human society developed and thrived. Weather extremes are outside historical experience. Sea-level rise is accelerating. Dangerous tipping points are ahead.
Graph: ed-hawkins.github.io/climate-visu...
November 13, 2025 at 11:52 AM
A giant tsunamigenic rock avalanche (1 km²) that traveled ~16 km (partly onto ice) has just been dated to 10.9 ka in south Greenland! 😲
Impressive case and paper! 👏

Contemporary to the one we just dated in Ecrins massif! ⏱️

Such events are expected to be more frequent due to climate change! 🔥
1/
November 13, 2025 at 7:41 PM
We are not ready for what's coming...

29.8°C in France mid November! 😱

These heat levels are just insane...🥵

Map via @sergezaka.bsky.social
November 13, 2025 at 7:07 PM
Floating upright for... over 130 yrs! 🌲🌊

First noticed by Diller in 1896, probably already submerged earlier and dead well before (14C dated to 450 BP)!

The 'Old Man of the Lake', a 9-m long Tsuga has been swimming in Crater Lake (Oregon) for over a century! 💪

Incredible tree story! 🥰
1/
November 12, 2025 at 1:21 PM
Glacier Blanc from Tuckett Hut
1926 | 2025

Exactly one century of man-induced ice loss at the largest glacier (now) in the Ecrins massif! 🧊🔥

The scale is difficult to grasp here, but the glacier has lost approx. 1.8 km in length over this period! 📈

📷 RTM and Ecrins NP
November 11, 2025 at 4:50 PM