Results 221 to 230 of about 1,915 (261)

Debris thickness patterns on debris-covered glaciers

Geomorphology, 2018
Abstract Many debris-covered glaciers have broadly similar debris thickness patterns: surface debris thickens and tends to transition from convex- to concave-up-down glacier. We explain this pattern using theory (analytical and numerical models) paired with empirical observations.
Leif S. Anderson, Robert S. Anderson
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Glaciation of alpine valleys: The glacier – debris-covered glacier – rock glacier continuum

Geomorphology, 2018
Abstract Alpine ice varies from pure ice glaciers to partially debris-covered glaciers to rock glaciers, as defined by the degree of debris cover. In many low- to mid-latitude mountain ranges, the few bare ice glaciers that do exist in the present climate are small and are found where snow is focused by avalanches and where direct exposure to ...
Robert S. Anderson, Leif S. Anderson, William H. Armstrong, Matthew W. Rossi, Sarah E. Crump   +4 more
openaire   +1 more source

Evaluating Simplified Numerical Models of Debris-Covered Glaciers

2021
<p>The transient response of debris-covered glaciers to a changing climate is governed by nonlinear feedbacks between ice dynamics, debris transport, and glacier geometry and that act over a wide range of temporal and spatial scales.
James C. Ferguson, Tobias Bolch, Andreas Vieli   +2 more
openaire   +1 more source

The geomorphology of debris-covered Ponkar Glacier, Nepal

2020
<p>Understanding the evolution of debris-covered glaciers in High Mountain Asia is important for making informed projections of climate change impacts and associated water security and hazard-related issues.  Here we describe the geomorphology of Ponkar Glacier, a debris-covered glacier in Nepal using high-resolution
Neil Glasser, Adina Racoviteanu, Stephan Harrison, Matthew Peacey, Rakesh Kayastha, Rijan Bhakta Kayastha   +5 more
openaire   +1 more source

Structurally controlled englacial origin of supraglacial debris cover and relief at a debris-covered Alpine glacier

2022
<p>It is common for temperate glaciers in mountainous regions to exhibit an extensive ablation-zone supraglacial debris cover. Although secondary reworking of surface debris and its role in modifying rates of glacier melt is receiving increasing attention, debris origin and primary distribution is poorly understood. Arguably, studies have
Darrel Swift, Andrew Jones, Matthew Westoby, Robert Bryant, Remy Veness   +4 more
openaire   +1 more source

Debris cover and the thinning of Kennicott Glacier, Alaska

2021
<p>Many glaciers in High Mountain Asia are experiencing the debris-cover anomaly. The Kennicott Glacier, a large Alaskan Glacier, is also thinning most rapidly under debris cover. This contradiction has been explained by melt hotspots, such as ice cliffs, streams, or ponds scattered within the debris cover or by declining ice flow in time.
Leif S. Anderson, William H. Armstrong, Robert S. Anderson, Dirk Scherler   +3 more
openaire   +1 more source

Applying SAR interferometric coherence to outline debris-covered glacier

2011 19th International Conference on Geoinformatics, 2011
In western China, many glaciers are covered with debris on their terminus or ablation areas. This characteristic makes it difficult to use optical remote sensing data to determine the outlines of glaciers. We present a method to extract the limits of glaciers through the classification of Synthetic Aperture Radar interferometric coherence images.
Zongli Jiang, Shiyin Liu, Xin Wang, Jian Lin, Sichun Long   +4 more
openaire   +1 more source

What does steady state mean for debris-covered glaciers?

2022
<p>Debris-covered glaciers accumulate supra-glacial debris on the glacier surface in the ablation zone. As long as this debris layer is not at least partly removed, it can be expected that glaciers continue to grow in length, because the thickening debris layer continuously reduces surface melt rates.
Christoph Mayer, Carlo Licciulli
openaire   +1 more source

DEBRIS-COVERED GLACIERS AND ROCK GLACIERS

2014
The debris-covered glaciers are observed all over the glaciation regions of the world (Alps, Antarctica, Greenland, Ants, Cascades, Rocky Mountains and ext.). The debris covered glaciers are the formations which occur as a result of the recession of normal glaciers.
GÜRGEN, Gürcan, Çaliskan, Onur
openaire   +1 more source

Comparisons of different methods for debris covered glacier classification

SPIE Proceedings, 2016
The paper outlines comparisons between different methods for the mapping of debris covered glaciers. The supervised classification method like Maximum Likelihood Classifier (MLC) has been tested using different data set for deriving the glacier area. Along with MLC the semi-automated method like Hierarchical Knowledge Based Classifier (HKBC) has also ...
R. K. Tiwari, P. K. Garg, V. Saini, A. Shukla   +3 more
openaire   +1 more source