Articles | Volume 15, issue 7
https://doi.org/10.5194/tc-15-3377-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-15-3377-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Modelling steady states and the transient response of debris-covered glaciers
James C. Ferguson
CORRESPONDING AUTHOR
Department of Geography, University of Zurich, Zurich, Switzerland
Andreas Vieli
Department of Geography, University of Zurich, Zurich, Switzerland
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Giulio Saibene, Isabelle Gärtner-Roer, Jan Beutel, and Andreas Vieli
EGUsphere, https://doi.org/10.5194/egusphere-2025-3029, https://doi.org/10.5194/egusphere-2025-3029, 2025
This preprint is open for discussion and under review for The Cryosphere (TC).
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Rock glaciers are bodies of frozen ground found in mountain regions. They move downslope and are mainly studied at the surface. Here, we analyze deformation data from a rock glacier borehole, providing continuous data for almost eight years. The data shows that the acceleration in the summer movement happens in the uppermost layer, while long-term movement is mostly occurring in a deeper layer. This is important for the interpretation of surface movements, which are used as climate indicators.
Andreas Henz, Johannes Reinthaler, Samuel U. Nussbaumer, Tancrède P. M. Leger, Sarah Kamleitner, Guillaume Jouvet, and Andreas Vieli
EGUsphere, https://doi.org/10.5194/egusphere-2025-2353, https://doi.org/10.5194/egusphere-2025-2353, 2025
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Glaciers are key to understanding climate change, reflecting historical variability. Using glacier models on the computer, we reconstructed European Alps glaciers during the Little Ice Age, with a total ice volume of 283 ± 42 cubic kilometres. Also, the study determines equilibrium line altitudes (ELAs) for over 4000 glaciers, showing patterns influenced by temperature, precipitation, and solar radiation. After all, we introduce a new ELA correction approach based on solar incidence.
Adrien Wehrlé, Martin P. Lüthi, and Andreas Vieli
The Cryosphere, 17, 309–326, https://doi.org/10.5194/tc-17-309-2023, https://doi.org/10.5194/tc-17-309-2023, 2023
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We characterized short-lived episodes of ice mélange weakening (IMW) at the front of three major Greenland outlet glaciers. Through a continuous detection at the front of Kangerdlugssuaq Glacier during the June-to-September period from 2018 to 2021, we found that 87 % of the IMW episodes occurred prior to a large-scale calving event. Using a simple model for ice mélange motion, we further characterized the IMW process as self-sustained through the existence of an IMW–calving feedback.
Alessandro Cicoira, Samuel Weber, Andreas Biri, Ben Buchli, Reynald Delaloye, Reto Da Forno, Isabelle Gärtner-Roer, Stephan Gruber, Tonio Gsell, Andreas Hasler, Roman Lim, Philippe Limpach, Raphael Mayoraz, Matthias Meyer, Jeannette Noetzli, Marcia Phillips, Eric Pointner, Hugo Raetzo, Cristian Scapozza, Tazio Strozzi, Lothar Thiele, Andreas Vieli, Daniel Vonder Mühll, Vanessa Wirz, and Jan Beutel
Earth Syst. Sci. Data, 14, 5061–5091, https://doi.org/10.5194/essd-14-5061-2022, https://doi.org/10.5194/essd-14-5061-2022, 2022
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This paper documents a monitoring network of 54 positions, located on different periglacial landforms in the Swiss Alps: rock glaciers, landslides, and steep rock walls. The data serve basic research but also decision-making and mitigation of natural hazards. It is the largest dataset of its kind, comprising over 209 000 daily positions and additional weather data.
Adrien Wehrlé, Martin P. Lüthi, Andrea Walter, Guillaume Jouvet, and Andreas Vieli
The Cryosphere, 15, 5659–5674, https://doi.org/10.5194/tc-15-5659-2021, https://doi.org/10.5194/tc-15-5659-2021, 2021
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We developed a novel automated method for the detection and the quantification of ocean waves generated by glacier calving. This method was applied to data recorded with a terrestrial radar interferometer at Eqip Sermia, Greenland. Results show a high calving activity at the glacier front sector ending in deep water linked with more frequent meltwater plumes. This suggests that rising subglacial meltwater plumes strongly affect glacier calving in deep water, but weakly in shallow water.
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Short summary
Debris-covered glaciers have a greater extent than their debris-free counterparts due to insulation from the debris cover. However, the transient response to climate change remains poorly understood. We use a numerical model that couples ice dynamics and debris transport and varies the climate signal. We find that debris cover delays the transient response, especially for the extent. However, adding cryokarst features near the terminus greatly enhances the response.
Debris-covered glaciers have a greater extent than their debris-free counterparts due to...