Melaine Le Roy
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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)... 😫
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
November 26, 2025 at 12:13 PM
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
November 26, 2025 at 11:17 AM
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...
November 26, 2025 at 10:46 AM
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! 📅
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November 24, 2025 at 9:49 PM
'Zermatt et le Mont Cervin'
Adolphe Braun
c. 1860

Absolutely gorgeous early view of this iconic landscape! 🏔️

The Matterhorn seems to float above a still wintery scenery - five years before its first ascent! ❄️
November 24, 2025 at 9:33 PM
Iran is undoubtedly one of the mid/low-latitudes regions that is warming the most! 🔥📈

Unbelievable anomalies... +2°C since the 1960s! 😱

As a result Damavand (5609 m asl) was snow free for 1st time this summer and chronic drought is threatening millions of people! 💧

Graph: @rarohde.bsky.social
November 24, 2025 at 12:49 PM
Ivory Glacier (NZ)
1980 | 2025

This small glacier within the high-precipitation (~10 m) maritime Westland was monitored for mass balance btw 1969 and 1975, and is almost extinct now! ✝️🧊🔥

Proglacial lake began to form early 1960s 🌊

📷 D. Norton
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November 23, 2025 at 7:34 PM
Franz Josef Glacier - Kā Roimata o Hine Hukatere
ca 1867 | 2022

Impressive comparison between the first known photograph taken of one of the most iconic NZ glaciers and current situation! 🧊🔥

The rock on the right is Sentinel Rock, one of the roches moutonnées in the glacier forefield
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November 23, 2025 at 6:07 PM
Franz Josef Glacier
2022 | 2024

Rapid demise of the tongue of one of the most iconic glacier in NZ! 🧊😱

The 'Black Hole' that appeared in the early 2000s is no longer surrounded by ice... 🔥

The last advance of this glacier (1983-2008) is now just a very distant memory! 😰

📷 D. Norton
November 23, 2025 at 5:24 PM
Incredible timelapse showing the retreat of Franz Joseph Glacier (NZ) over only 7 years (2012-2019)! 🧊🔥

The ice flow velocity (up to 2 m/day!) combined with the incredible rate of retreat of the front (900 m over this period!) is simply mind-boggling! 🤪

📽️ Brian Anderson

vimeo.com/443262699?fl...
Franz Josef Glacier retreats 900 metres
A timelapse camera, installed in 2012, records the retreat of Franz Josef Glacier/Kā Roimata o Hine Hukatere. Until 2019 the glacier retreated about 900 m. These…
vimeo.com
November 23, 2025 at 4:08 PM
Over the past year, France has experienced 278 days above the norm! 🔥📈
With lengthy heatwaves between +5 and +10°C! 🥵

And some people will say that ONE DAY at -5.6°C below the norm will balance everything out! 🤡
November 23, 2025 at 12:01 PM
Rock glaciers (creeping bodies made of a mixture of scree and interstitial ice), flow at lower speed than glaciers, typically few dm/yr 🧊

Here are 8 yrs of RG surface change on the Dos Lenguas RG (Dry Argentinean Andes), at 11 cm resolution!! 💪

Data: Melanie Stammler 🙏
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November 21, 2025 at 12:36 PM
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
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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