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glaciers & ice sheets

Google Earth image of the landslide at the Barry Glacier in Alaska in 2019.
Posted inThe Landslide Blog

Landslides during periods of glacial retreat in Alaska

by Dave Petley 30 June 202530 June 2025

An excellent new paper (Walden et al. 2025) examines the occurrence of accelerated movement in rock slope landslides in Alaska as adjacent glaciers melt. The exceptional temperatures in recent days in both North America and Europe has once again highlighted the rate at which the climate is changing in response to anthropogenic increases in greenhouse […]

The landslide on the Lakina River in Alaska. Photograph posted to Facebook by John Matthews.
Posted inThe Landslide Blog

A landslide on the Lakina River in Alaska

by Dave Petley 5 June 20255 June 2025

A recent Facebook post has highlighted a reasonably large slump landslide in a remote area of Alaska. Satellite images suggest that this occurred in late October or early November 2024. Loyal reader Andrew McNown kindly highlighted a recent Facebook post that provided some images of a landslide that has partially blocked the Lakina River in […]

Google Earth image of a mountainous region with a deeply incised fjord and low relief surfaces surrounding.
Posted inEditors' Highlights

High Relief, Low Relief — Glaciers Do It All

by Peter Zeitler 4 June 20254 June 2025

Contrary to conventional wisdom that glaciers just carve landscapes, they can also form low-relief surfaces by sheltering rock from erosion, enriching understanding of how mountain landscapes evolve.

Photo of a mountainous region with a rock glacier and pool of water in front.
Posted inEditors' Vox

Rock Glacier Velocity: Monitoring Permafrost Amid Climate Change

by Yan Hu and Reynald Delaloye 3 June 20252 June 2025

The movement of unique landforms called “rock glaciers” give insight into how climate change is impacting permafrost in mountainous regions.

The current situation on the Birch Glacier at Blatten, showing the heavy fracturing in the ice of the Birch Glacier.
Posted inThe Landslide Blog

The 28 May 2025 catastrophic failure of the Birch Glacier and the partial burial of Blatten

by Dave Petley 29 May 202529 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. Over the course of the last few days, I have been blogging about the evolving situation on the slopes above Blatten in Switzerland. I documented that attention slowly transitioned from worries about […]

The current situation on the Birch Glacier at Blatten.
Posted inThe Landslide Blog

The 28 May 2025 update on the landslide threatening Blatten in Switzerland

by Dave Petley 28 May 202528 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. Over the last 24 hours there have been further developments in the situation on the slopes above Blatten in Switzerland, with attention continuing to focus primarily on the Birch Glacier. Yesterday evening […]

Webcam image from 27 May 2025 showing the deforming slope at Blatten in Switzerland.
Posted inThe Landslide Blog

The 26/27 May 2025 update on the landslide threatening Blatten in Switzerland

by Dave Petley 27 May 202527 May 2025

Smaller rockfalls have reduced the risk of a major rock slope collapse above Blatten, but attention has shifted to the Birch Glacier, which is now moving at 10 metres per day. The Landslide Blog is written by Dave Petley, who is widely recognised as a world leader in the study and management of landslides. Over […]

Tall glacier face with layered ice wall meeting rocky terrain, with a person in bright-colored clothing at the base.
Posted inNews

Newly Discovered Algae May Speed Melting of Antarctic Ice

by Andrew Chapman 9 May 20259 May 2025

Purple pigmentation in a diverse array of algae absorbs heat and creates a feedback loop responsible for 2% of total daily melting.

A large iceberg floats in the sea.
Posted inResearch & Developments

NOAA Halts Maintenance of Key Arctic Data at National Snow and Ice Data Center

by Grace van Deelen 8 May 20258 May 2025

The National Snow and Ice Data Center (NSIDC) may no longer actively maintain or update some of its snow and ice data products after losing support from NOAA’s National Centers for Environmental Information, according to a 6 May announcement.

Posted inThe Landslide Blog

Images of the source of the 28 April 2025 landslide / GLOF at Vallunaraju in Peru

by Dave Petley 8 May 20258 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. A few days ago I highlighted the severe landslide and GLOF that occurred on the flanks of Vallunaraju in Peru, on 28 April 2025, which caused substantial damage and at least two […]

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Coherent, Not Chaotic, Migration in the Brahmaputra-Jamuna River

2 July 20252 July 2025
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The Mid-20th Century Winter Cooling in the Eastern U.S. Explained

3 July 20253 July 2025
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Water Tracks: The Veins of Thawing Landscapes

25 June 202525 June 2025
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