Articles | Volume 13, issue 5
https://doi.org/10.5194/esurf-13-981-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-13-981-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
08 Oct 2025
Research article |
| 08 Oct 2025
| 08 Oct 2025
Slow-moving rock glaciers in marginal periglacial environment of Southern Carpathians
Alexandru Onaca
Department of Geography, West University of Timişoara, Timişoara, Romania
Institute for Advanced Environmental Research, West University of Timişoara, Timişoara, Romania
Institute for Advanced Environmental Research, West University of Timişoara, Timişoara, Romania
Valentin Poncoş
Terrasigna, Bucharest, Romania
Christin Hilbich
Department of Geosciences, University of Fribourg, Fribourg, Switzerland
Tazio Strozzi
Gamma Remote Sensing, Gümligen, Switzerland
Petru Urdea
Department of Geography, West University of Timişoara, Timişoara, Romania
Institute for Advanced Environmental Research, West University of Timişoara, Timişoara, Romania
Răzvan Popescu
Department of Geography, West University of Timişoara, Timişoara, Romania
Faculty of Geography, University of Bucharest, Bucharest, Romania
Oana Berzescu
Institute for Advanced Environmental Research, West University of Timişoara, Timişoara, Romania
Bernd Etzelmüller
Department of Geosciences, University of Oslo, Oslo, Norway
Alfred Vespremeanu-Stroe
Faculty of Geography, University of Bucharest, Bucharest, Romania
Mirela Vasile
Department of Geography, West University of Timişoara, Timişoara, Romania
Division of Earth, Environmental and Life Sciences, University of Bucharest Research Institute, Bucharest, Romania
Delia Teleagă
Terrasigna, Bucharest, Romania
Dan Birtaş
Terrasigna, Bucharest, Romania
Iosif Lopătiţă
Department of Geography, West University of Timişoara, Timişoara, Romania
Simon Filhol
Department of Geosciences, University of Oslo, Oslo, Norway
Alexandru Hegyi
Institute for Advanced Environmental Research, West University of Timişoara, Timişoara, Romania
Department of Geosciences, University of Oslo, Oslo, Norway
Florina Ardelean
Department of Geography, West University of Timişoara, Timişoara, Romania
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Tazio Strozzi, Nina Jones, Federico Agliardi, Alessandro De Pedrini, Othmar Frey, Philipp Bernhard, Rafael Caduff, Christian Ambrosi, and Andrea Manconi
Nat. Hazards Earth Syst. Sci., 26, 2579–2607, https://doi.org/10.5194/nhess-26-2579-2026, https://doi.org/10.5194/nhess-26-2579-2026, 2026
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The latest satellite technology with longer wavelength radar improves our ability to detect and monitor large alpine rock slope instabilities. This approach works better than current satellite systems in forested areas and on fast-moving slopes, giving experts more reliable data to understand these major hazards. Our results from three locations in Italy and Switzerland also provide important recommendations for the preparation of future satellite radar missions.
Laurențiu Țuțuianu, Florin Zăinescu, Alfred Vespremeanu-Stroe, Ionel Bogdan Stan, Mihaela Dobre, Maria Luca-Ilie, Gabriela Sava, Cristian Mănăilescu, and Luminiţa Preoteasa
EGUsphere, https://doi.org/10.5194/egusphere-2026-1693, https://doi.org/10.5194/egusphere-2026-1693, 2026
This preprint is open for discussion and under review for Biogeosciences (BG).
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Floodplain sediments store large amounts of organic carbon, but the processes controlling how much is buried and preserved over millennia remain poorly constrained. Using eight sediment cores from the Lower Danube floodplain, we reconstructed seven thousand years of carbon accumulation and show that changes in sea level, sediment supply, and human land use influenced the efficiency of carbon storage, with implications for floodplain restoration and climate mitigation.
Tazio Strozzi, Erik Schytt Mannerfelt, Oliver Cartus, Maurizio Santoro, Thomas Schellenberger, and Andreas Kääb
The Cryosphere, 20, 1679–1697, https://doi.org/10.5194/tc-20-1679-2026, https://doi.org/10.5194/tc-20-1679-2026, 2026
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By analysing 30 years of satellite SAR (Synthetic Aperture Radar) data, we have found that the number of glacier surges over Svalbard has tripled since 2015. We show that this increase is unlikely to be explained solely by improvements in data quality or by random fluctuations in surge frequency, suggesting that this trend is caused by an external forcing mechanism. Given our incomplete understanding of surge initiation, the cause of the observed threefold increase remains however uncertain.
Andreas Aspaas, Gregory Bievre, Pascal Lacroix, Nadège Langet, Juditha Aga, Ingrid Skrede, Lene Kristensen, Bernd Etzelmuller, and François Renard
EGUsphere, https://doi.org/10.5194/egusphere-2026-62, https://doi.org/10.5194/egusphere-2026-62, 2026
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Climate change increases landslide risk in cold regions. We analyzed 12 years of GPS, borehole, water, and seismic data from two landslides in Arctic Norway, one with permafrost and one without. Both accelerate in spring and autumn due to water infiltration. One slip zone shows increasing snowmelt sensitivity while seismic data reveal seasonal stiffness changes. Results advance understanding of water-driven landslide dynamics in Arctic climates.
Tamara Mathys, Muslim Azimshoev, Zhoodarbeshim Bektursunov, Christian Hauck, Christin Hilbich, Murataly Duishonakunov, Abdulhamid Kayumov, Nikolay Kassatkin, Vassily Kapitsa, Leo C. P. Martin, Coline Mollaret, Hofiz Navruzshoev, Eric Pohl, Tomas Saks, Intizor Silmonov, Timur Musaev, Ryskul Usubaliev, and Martin Hoelzle
The Cryosphere, 19, 6591–6628, https://doi.org/10.5194/tc-19-6591-2025, https://doi.org/10.5194/tc-19-6591-2025, 2025
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This study provides a comprehensive geophysical dataset on permafrost in the data-scarce Tien Shan and Pamir mountain regions of Central Asia. It also introduces a novel modeling method to quantify ground ice content across different landforms. The findings indicate that this approach is well suited for characterizing ice-rich permafrost, which is crucial for evaluating future water availability and assessing risks associated with thawing permafrost.
Ikram Zangana, Rainer Bell, Lucian Drăguţ, Flavius Sîrbu, and Lothar Schrott
Nat. Hazards Earth Syst. Sci., 25, 4787–4806, https://doi.org/10.5194/nhess-25-4787-2025, https://doi.org/10.5194/nhess-25-4787-2025, 2025
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Mapping landslides is essential for understanding hazards and risk assessment. This study used a geographic object-based image analysis (GEOBIA) approach with high-resolution lidar data to map forest-covered historical landslides in Jena, Germany. Optimizing the moving-window size for lidar derivatives improved accuracy, detecting more landslides and reducing errors. This method showcases the potential of lidar-based approaches for global landslide inventory and hazard assessment.
Line Rouyet, Tobias Bolch, Francesco Brardinoni, Rafael Caduff, Diego Cusicanqui, Margaret Darrow, Reynald Delaloye, Thomas Echelard, Christophe Lambiel, Cécile Pellet, Lucas Ruiz, Lea Schmid, Flavius Sirbu, and Tazio Strozzi
Earth Syst. Sci. Data, 17, 4125–4157, https://doi.org/10.5194/essd-17-4125-2025, https://doi.org/10.5194/essd-17-4125-2025, 2025
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Rock glaciers are landforms generated by the creep of frozen ground (permafrost) in cold-climate mountains. Mapping rock glaciers contributes to documenting the distribution and the dynamics of mountain permafrost. We compiled inventories documenting the location, the characteristics, and the extent of rock glaciers in 12 mountain regions around the world. In each region, a team of operators performed the work following common rules and agreed on final solutions when discrepancies were identified.
Cassandra E. M. Koenig, Christin Hilbich, Christian Hauck, Lukas U. Arenson, and Pablo Wainstein
The Cryosphere, 19, 2653–2676, https://doi.org/10.5194/tc-19-2653-2025, https://doi.org/10.5194/tc-19-2653-2025, 2025
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This study presents the first regional compilation of borehole temperature data from high-altitude permafrost sites in the Andes, providing a baseline of ground thermal conditions. Data from 53 boreholes show thermal characteristics similar to other mountain permafrost areas, but uniquely shaped by Andean topo-climatic conditions. The study emphasizes the need for ongoing monitoring and is a notable collaboration between industry, academia, and regulators in advancing climate change research.
Andrea Manconi, Gwendolyn Dasser, Mylène Jacquemart, Nicolas Oestreicher, Livia Piermattei, and Tazio Strozzi
Abstr. Int. Cartogr. Assoc., 9, 41, https://doi.org/10.5194/ica-abs-9-41-2025, https://doi.org/10.5194/ica-abs-9-41-2025, 2025
Barbara Widhalm, Annett Bartsch, Tazio Strozzi, Nina Jones, Artem Khomutov, Elena Babkina, Marina Leibman, Rustam Khairullin, Mathias Göckede, Helena Bergstedt, Clemens von Baeckmann, and Xaver Muri
The Cryosphere, 19, 1103–1133, https://doi.org/10.5194/tc-19-1103-2025, https://doi.org/10.5194/tc-19-1103-2025, 2025
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Mapping soil moisture in Arctic permafrost regions is crucial for various activities, but it is challenging with typical satellite methods due to the landscape's diversity. Seasonal freezing and thawing cause the ground to periodically rise and subside. Our research demonstrates that this seasonal ground settlement, measured with Sentinel-1 satellite data, is larger in areas with wetter soils. This method helps to monitor permafrost degradation.
Theresa Maierhofer, Adrian Flores Orozco, Nathalie Roser, Jonas K. Limbrock, Christin Hilbich, Clemens Moser, Andreas Kemna, Elisabetta Drigo, Umberto Morra di Cella, and Christian Hauck
The Cryosphere, 18, 3383–3414, https://doi.org/10.5194/tc-18-3383-2024, https://doi.org/10.5194/tc-18-3383-2024, 2024
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In this study, we apply an electrical method in a high-mountain permafrost terrain in the Italian Alps, where long-term borehole temperature data are available for validation. In particular, we investigate the frequency dependence of the electrical properties for seasonal and annual variations along a 3-year monitoring period. We demonstrate that our method is capable of resolving temporal changes in the thermal state and the ice / water ratio associated with seasonal freeze–thaw processes.
Thomas J. Barnes, Thomas V. Schuler, Simon Filhol, and Karianne S. Lilleøren
Earth Surf. Dynam., 12, 801–818, https://doi.org/10.5194/esurf-12-801-2024, https://doi.org/10.5194/esurf-12-801-2024, 2024
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In this paper, we use machine learning to automatically outline landforms based on their characteristics. We test several methods to identify the most accurate and then proceed to develop the most accurate to improve its accuracy further. We manage to outline landforms with 65 %–75 % accuracy, at a resolution of 10 m, thanks to high-quality/high-resolution elevation data. We find that it is possible to run this method at a country scale to quickly produce landform inventories for future studies.
Aldo Bertone, Nina Jones, Volkmar Mair, Riccardo Scotti, Tazio Strozzi, and Francesco Brardinoni
The Cryosphere, 18, 2335–2356, https://doi.org/10.5194/tc-18-2335-2024, https://doi.org/10.5194/tc-18-2335-2024, 2024
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Traditional inventories display high uncertainty in discriminating between intact (permafrost-bearing) and relict (devoid) rock glaciers (RGs). Integration of InSAR-based kinematics in South Tyrol affords uncertainty reduction and depicts a broad elevation belt of relict–intact coexistence. RG velocity and moving area (MA) cover increase linearly with elevation up to an inflection at 2600–2800 m a.s.l., which we regard as a signature of sporadic-to-discontinuous permafrost transition.
Bernd Etzelmüller, Ketil Isaksen, Justyna Czekirda, Sebastian Westermann, Christin Hilbich, and Christian Hauck
The Cryosphere, 17, 5477–5497, https://doi.org/10.5194/tc-17-5477-2023, https://doi.org/10.5194/tc-17-5477-2023, 2023
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Permafrost (permanently frozen ground) is widespread in the mountains of Norway and Iceland. Several boreholes were drilled after 1999 for long-term permafrost monitoring. We document a strong warming of permafrost, including the development of unfrozen bodies in the permafrost. Warming and degradation of mountain permafrost may lead to more natural hazards.
Anatoly O. Sinitsyn, Sara Bazin, Rasmus Benestad, Bernd Etzelmüller, Ketil Isaksen, Hanne Kvitsand, Julia Lutz, Andrea L. Popp, Lena Rubensdotter, and Sebastian Westermann
EGUsphere, https://doi.org/10.5194/egusphere-2023-2950, https://doi.org/10.5194/egusphere-2023-2950, 2023
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This study looked at under the ground on Svalbard, an archipelago close to the North Pole. We found something very surprising – there is water under the all year around frozen soil. This was not known before. This water could be used for drinking if we manage it carefully. This is important because getting clean drinking water is very difficult in Svalbard, and other Arctic places. Also, because the climate is getting warmer, there might be even more water underground in the future.
Johannes Buckel, Jan Mudler, Rainer Gardeweg, Christian Hauck, Christin Hilbich, Regula Frauenfelder, Christof Kneisel, Sebastian Buchelt, Jan Henrik Blöthe, Andreas Hördt, and Matthias Bücker
The Cryosphere, 17, 2919–2940, https://doi.org/10.5194/tc-17-2919-2023, https://doi.org/10.5194/tc-17-2919-2023, 2023
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This study reveals permafrost degradation by repeating old geophysical measurements at three Alpine sites. The compared data indicate that ice-poor permafrost is highly affected by temperature warming. The melting of ice-rich permafrost could not be identified. However, complex geomorphic processes are responsible for this rather than external temperature change. We suspect permafrost degradation here as well. In addition, we introduce a new current injection method for data acquisition.
Justyna Czekirda, Bernd Etzelmüller, Sebastian Westermann, Ketil Isaksen, and Florence Magnin
The Cryosphere, 17, 2725–2754, https://doi.org/10.5194/tc-17-2725-2023, https://doi.org/10.5194/tc-17-2725-2023, 2023
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We assess spatio-temporal permafrost variations in selected rock walls in Norway over the last 120 years. Ground temperature is modelled using the two-dimensional ground heat flux model CryoGrid 2D along nine profiles. Permafrost probably occurs at most sites. All simulations show increasing ground temperature from the 1980s. Our simulations show that rock wall permafrost with a temperature of −1 °C at 20 m depth could thaw at this depth within 50 years.
Sebastian Westermann, Thomas Ingeman-Nielsen, Johanna Scheer, Kristoffer Aalstad, Juditha Aga, Nitin Chaudhary, Bernd Etzelmüller, Simon Filhol, Andreas Kääb, Cas Renette, Louise Steffensen Schmidt, Thomas Vikhamar Schuler, Robin B. Zweigel, Léo Martin, Sarah Morard, Matan Ben-Asher, Michael Angelopoulos, Julia Boike, Brian Groenke, Frederieke Miesner, Jan Nitzbon, Paul Overduin, Simone M. Stuenzi, and Moritz Langer
Geosci. Model Dev., 16, 2607–2647, https://doi.org/10.5194/gmd-16-2607-2023, https://doi.org/10.5194/gmd-16-2607-2023, 2023
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The CryoGrid community model is a new tool for simulating ground temperatures and the water and ice balance in cold regions. It is a modular design, which makes it possible to test different schemes to simulate, for example, permafrost ground in an efficient way. The model contains tools to simulate frozen and unfrozen ground, snow, glaciers, and other massive ice bodies, as well as water bodies.
Cas Renette, Kristoffer Aalstad, Juditha Aga, Robin Benjamin Zweigel, Bernd Etzelmüller, Karianne Staalesen Lilleøren, Ketil Isaksen, and Sebastian Westermann
Earth Surf. Dynam., 11, 33–50, https://doi.org/10.5194/esurf-11-33-2023, https://doi.org/10.5194/esurf-11-33-2023, 2023
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One of the reasons for lower ground temperatures in coarse, blocky terrain is a low or varying soil moisture content, which most permafrost modelling studies did not take into account. We used the CryoGrid community model to successfully simulate this effect and found markedly lower temperatures in well-drained, blocky deposits compared to other set-ups. The inclusion of this drainage effect is another step towards a better model representation of blocky mountain terrain in permafrost regions.
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.
Karianne S. Lilleøren, Bernd Etzelmüller, Line Rouyet, Trond Eiken, Gaute Slinde, and Christin Hilbich
Earth Surf. Dynam., 10, 975–996, https://doi.org/10.5194/esurf-10-975-2022, https://doi.org/10.5194/esurf-10-975-2022, 2022
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In northern Norway we have observed several rock glaciers at sea level. Rock glaciers are landforms that only form under the influence of permafrost, which is frozen ground. Our investigations show that the rock glaciers are probably not active under the current climate but most likely were active in the recent past. This shows how the Arctic now changes due to climate changes and also how similar areas in currently colder climates will change in the future.
Aldo Bertone, Chloé Barboux, Xavier Bodin, Tobias Bolch, Francesco Brardinoni, Rafael Caduff, Hanne H. Christiansen, Margaret M. Darrow, Reynald Delaloye, Bernd Etzelmüller, Ole Humlum, Christophe Lambiel, Karianne S. Lilleøren, Volkmar Mair, Gabriel Pellegrinon, Line Rouyet, Lucas Ruiz, and Tazio Strozzi
The Cryosphere, 16, 2769–2792, https://doi.org/10.5194/tc-16-2769-2022, https://doi.org/10.5194/tc-16-2769-2022, 2022
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We present the guidelines developed by the IPA Action Group and within the ESA Permafrost CCI project to include InSAR-based kinematic information in rock glacier inventories. Nine operators applied these guidelines to 11 regions worldwide; more than 3600 rock glaciers are classified according to their kinematics. We test and demonstrate the feasibility of applying common rules to produce homogeneous kinematic inventories at global scale, useful for hydrological and climate change purposes.
Tamara Mathys, Christin Hilbich, Lukas U. Arenson, Pablo A. Wainstein, and Christian Hauck
The Cryosphere, 16, 2595–2615, https://doi.org/10.5194/tc-16-2595-2022, https://doi.org/10.5194/tc-16-2595-2022, 2022
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With ongoing climate change, there is a pressing need to understand how much water is stored as ground ice in permafrost. Still, field-based data on permafrost in the Andes are scarce, resulting in large uncertainties regarding ground ice volumes and their hydrological role. We introduce an upscaling methodology of geophysical-based ground ice quantifications at the catchment scale. Our results indicate that substantial ground ice volumes may also be present in areas without rock glaciers.
Frank Paul, Livia Piermattei, Désirée Treichler, Lin Gilbert, Luc Girod, Andreas Kääb, Ludivine Libert, Thomas Nagler, Tazio Strozzi, and Jan Wuite
The Cryosphere, 16, 2505–2526, https://doi.org/10.5194/tc-16-2505-2022, https://doi.org/10.5194/tc-16-2505-2022, 2022
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Glacier surges are widespread in the Karakoram and have been intensely studied using satellite data and DEMs. We use time series of such datasets to study three glacier surges in the same region of the Karakoram. We found strongly contrasting advance rates and flow velocities, maximum velocities of 30 m d−1, and a change in the surge mechanism during a surge. A sensor comparison revealed good agreement, but steep terrain and the two smaller glaciers caused limitations for some of them.
Theresa Maierhofer, Christian Hauck, Christin Hilbich, Andreas Kemna, and Adrián Flores-Orozco
The Cryosphere, 16, 1903–1925, https://doi.org/10.5194/tc-16-1903-2022, https://doi.org/10.5194/tc-16-1903-2022, 2022
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We extend the application of electrical methods to characterize alpine permafrost using the so-called induced polarization (IP) effect associated with the storage of charges at the interface between liquid and solid phases. We investigate different field protocols to enhance data quality and conclude that with appropriate measurement and processing procedures, the characteristic dependence of the IP response of frozen rocks improves the assessment of thermal state and ice content in permafrost.
Christin Hilbich, Christian Hauck, Coline Mollaret, Pablo Wainstein, and Lukas U. Arenson
The Cryosphere, 16, 1845–1872, https://doi.org/10.5194/tc-16-1845-2022, https://doi.org/10.5194/tc-16-1845-2022, 2022
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In view of water scarcity in the Andes, the significance of permafrost as a future water resource is often debated focusing on satellite-detected features such as rock glaciers. We present data from > 50 geophysical surveys in Chile and Argentina to quantify the ground ice volume stored in various permafrost landforms, showing that not only rock glacier but also non-rock-glacier permafrost contains significant ground ice volumes and is relevant when assessing the hydrological role of permafrost.
Noah D. Smith, Eleanor J. Burke, Kjetil Schanke Aas, Inge H. J. Althuizen, Julia Boike, Casper Tai Christiansen, Bernd Etzelmüller, Thomas Friborg, Hanna Lee, Heather Rumbold, Rachael H. Turton, Sebastian Westermann, and Sarah E. Chadburn
Geosci. Model Dev., 15, 3603–3639, https://doi.org/10.5194/gmd-15-3603-2022, https://doi.org/10.5194/gmd-15-3603-2022, 2022
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The Arctic has large areas of small mounds that are caused by ice lifting up the soil. Snow blown by wind gathers in hollows next to these mounds, insulating them in winter. The hollows tend to be wetter, and thus the soil absorbs more heat in summer. The warm wet soil in the hollows decomposes, releasing methane. We have made a model of this, and we have tested how it behaves and whether it looks like sites in Scandinavia and Siberia. Sometimes we get more methane than a model without mounds.
Tazio Strozzi, Andreas Wiesmann, Andreas Kääb, Thomas Schellenberger, and Frank Paul
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2022-44, https://doi.org/10.5194/essd-2022-44, 2022
Revised manuscript not accepted
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Knowledge on surface velocity of glaciers and ice caps contributes to a better understanding of a wide range of processes related to glacier dynamics, mass change and response to climate. Based on the release of historical satellite radar data from various space agencies we compiled nearly complete mosaics of winter ice surface velocities for the 1990's over the Eastern Arctic. Compared to the present state, we observe a general increase of ice velocities along with a retreat of glacier fronts.
Bernd Etzelmüller, Justyna Czekirda, Florence Magnin, Pierre-Allain Duvillard, Ludovic Ravanel, Emanuelle Malet, Andreas Aspaas, Lene Kristensen, Ingrid Skrede, Gudrun D. Majala, Benjamin Jacobs, Johannes Leinauer, Christian Hauck, Christin Hilbich, Martina Böhme, Reginald Hermanns, Harald Ø. Eriksen, Tom Rune Lauknes, Michael Krautblatter, and Sebastian Westermann
Earth Surf. Dynam., 10, 97–129, https://doi.org/10.5194/esurf-10-97-2022, https://doi.org/10.5194/esurf-10-97-2022, 2022
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This paper is a multi-authored study documenting the possible existence of permafrost in permanently monitored rockslides in Norway for the first time by combining a multitude of field data, including geophysical surveys in rock walls. The paper discusses the possible role of thermal regime and rockslide movement, and it evaluates the possible impact of atmospheric warming on rockslide dynamics in Norwegian mountains.
Léo C. P. Martin, Jan Nitzbon, Johanna Scheer, Kjetil S. Aas, Trond Eiken, Moritz Langer, Simon Filhol, Bernd Etzelmüller, and Sebastian Westermann
The Cryosphere, 15, 3423–3442, https://doi.org/10.5194/tc-15-3423-2021, https://doi.org/10.5194/tc-15-3423-2021, 2021
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It is important to understand how permafrost landscapes respond to climate changes because their thaw can contribute to global warming. We investigate how a common permafrost morphology degrades using both field observations of the surface elevation and numerical modeling. We show that numerical models accounting for topographic changes related to permafrost degradation can reproduce the observed changes in nature and help us understand how parameters such as snow influence this phenomenon.
Cited articles
Allen, M. R., Dube, O. P., Solecki, W., Aragón-Durand, F., Cramer, W., Humphreys, S., Kainuma, M., Kala, J., Mahowald, N., Mulugetta, Y., Perez, R., Wairiu, M., and Zickfeld, K.: Framing and Context, in: Global Warming of 1.5 °C, in: An IPCC Special Report on the impacts of global warming of 1.5 °C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, edited by: Masson-Delmotte, V., Zhai, P., Pörtner, H.-O., Roberts, D., Skea, J., Shukla, P. R., Pirani, A., Moufouma-Okia, W., Péan, C., Pidcock, R., Connors, S., Matthews, J. B. R., Chen, Y., Zhou, X., Gomis, M. I., Lonnoy, E., Maycock, T., Tignor, M., and Waterfield, T., Cambridge University Press, Cambridge, UK and New York, NY, USA, 49–92, https://doi.org/10.1017/9781009157940.003, 2018.
Amschwand, D., Ivy-Ochs, S., Frehner, M., Steinemann, O., Christl, M., and Vockenhuber, C.: Deciphering the evolution of the Bleis Marscha rock glacier (Val d'Err, eastern Switzerland) with cosmogenic nuclide exposure dating, aerial image correlation, and finite element modeling, The Cryosphere, 15, 2057–2081, https://doi.org/10.5194/tc-15-2057-2021, 2021.
Amschwand, D., Scherler, M., Hoelzle, M., Krummenacher, B., Haberkorn, A., Kienholz, C., and Gubler, H.: Surface heat fluxes at coarse blocky Murtèl rock glacier (Engadine, eastern Swiss Alps), The Cryosphere, 18, 2103–2139, https://doi.org/10.5194/tc-18-2103-2024, 2024.
Archie, G. E.: The electrical resitivity log as an aid in determining some reservoir characteristics, Petroleum Transactions of American Institute of Mining and Metallurgical Engineers (AIME), 146, 54–62, https://doi.org/10.2118/942054-G, 1942.
Barboux, C., Delaloye, R., and Lambiel, C.: Inventorying slope movements in an Alpine environment using DInSAR, Earth Surf. Processes, 39, 2087–2099, https://doi.org/10.1002/esp.3603, 2014.
Barsch, D.: Rockglaciers: Indicators for the Present and Former Geoecology in High Mountain Environments, Springer, Berlin, 331 pp., ISBN 3-540-60742-0, 1996.
Bernhard, L., Sutter, F., Haeberli, W., and Keller, F.: Processes of snow/permafrost-interaction at a high-mountain site, Murtél/Corvatsch, Easterns Swiss Alps, in 7th International Conference on Permafrost, Yellowknife, Canada, Collection Nordicana, 57, 35–41, 1998.
Bertone, A., Barboux, C., Bodin, X., Bolch, T., Brardinoni, F., Caduff, R., Christiansen, H. H., Darrow, M. M., Delaloye, R., Etzelmüller, B., Humlum, O., Lambiel, C., Lilleøren, K. S., Mair, V., Pellegrinon, G., Rouyet, L., Ruiz, L., and Strozzi, T.: Incorporating InSAR kinematics into rock glacier inventories: insights from 11 regions worldwide, The Cryosphere, 16, 2769–2792, https://doi.org/10.5194/tc-16-2769-2022, 2022.
Bertone, A., Jones, N., Mair, V., Scotti, R., Strozzi, T., and Brardinoni, F.: A climate-driven, altitudinal transition in rock glacier dynamics detected through integration of geomorphological mapping and synthetic aperture radar interferometry (InSAR)-based kinematics, The Cryosphere, 18, 2335–2356, https://doi.org/10.5194/tc-18-2335-2024, 2024.
Berzescu, O., Ardelean, F., Urdea, P., Ioniţă, A., and Onaca, A.: Thermal Regime Characteristics of Alpine Springs in the Marginal Periglacial Environment of the Southern Carpathians, Sustainability, 17, 4182, https://doi.org/10.3390/su17094182, 2025.
Brencher, G., Handwerger, A. L., and Munroe, J. S.: InSAR-based characterization of rock glacier movement in the Uinta Mountains, Utah, USA, The Cryosphere, 15, 4823–4844, https://doi.org/10.5194/tc-15-4823-2021, 2021.
Cicoira, A., Beutel, J., Faillettaz, J., and Vieli, A.: Water controls the seasonal rhythm of rock glacier flow, Earth Planet. Sc. Lett., 528, 115844, https://doi.org/10.1016/j.epsl.2019.115844, 2019.
Cicoira, A., Marcer, M., Gärtner-Roer, I., Bodin, X., Arenson, L. U., and Vieli, A.: A general theory of rock glacier creep based on in-situ and remote sensing observations, Permafrost Periglac., 32, 139–153, https://doi.org/10.1002/ppp.2090, 2021.
Colucci, R. R., Forte, E., Žebre, M., Maset, E., Zanettini, C., and Guglielmin, M.: Is that a relict rock glacier?, Geomorphology, 330, 177–189, https://doi.org/10.1016/j.geomorph.2019.02.002, 2019.
Crosetto, M., Monserrat, O., Cuevas-González, M., Devanthéry, N., and Crippa, B.: Persistent Scatterer Interferometry: A review, ISPRS J. Photogramm., 115, 78–89, https://doi.org/10.1016/j.isprsjprs.2015.10.011, 2016.
Delaloye, R. and Lambiel, C.: Evidence of winter ascending air circulation throughout talus slopes and rock glaciers situated in the lower belt of alpine discontinuous permafrost (Swiss Alps), Nor. Geogr. Tidsskr., 59, 194–203, https://doi.org/10.1080/00291950510020673, 2005.
Delaloye, R., Morard, S., Barboux, C., Abbet, D., Gruber, V., Riedo, M., and Gachet, S.: Rapidly moving rock glaciers in Mattertal, in: Mattertal – ein Tal in Bewegung, edited by: Graf, C., Publikation zur Jahrestagung der Schweizerischen Geomorphologischen Gesellschaft 29. Juni–1. Juli 2011, St. Niklaus, Birmensdorf, Eidg. Forschungsanstalt WSL, 21–30, 2013.
Eriksen, H. Ø., Rouyet, L., Lauknes, T. R., Berthling, I., Isaksen, K., Hindberg, H., Larsen, Y., and Corner, G. D.: Recent Acceleration of a Rock Glacier Complex, Ádjet, Norway, Documented by 62 Years of Remote Sensing Observations, Geophys. Res. Lett., 45, 8314–8323, https://doi.org/10.1029/2018GL077605, 2018.
European Environment Agency (EEA): EGMS Algorithm Theoretical Basis Document (ATBD), Copernicus Land Monitoring Service, https://land.copernicus.eu/en/technical-library/egms-algorithm-theoretical-basis-document/@@download/file, last access: 18 April 2025.
Farbrot, H., Etzelmüller, B., Guðmundsson, Á., Humlum, O., Kellerer-Pirklbauer, A., Eiken, T., and Wangensteen, B.: Rock glaciers and permafrost in Tröllaskagi, Northern Iceland, Z. Geomorphol., 51, 1–16, https://doi.org/10.1127/0372-8854/2007/0051s2-0001, 2007.
Haeberli, W.: Die Basis-Temperatur der winterlichen Schneedecke als möglicher Indikator für die Verbreitung von Permafrost in den Alpen, Zeitschrift für Gletscherkunde und Glazialgeologie, 9, 221–227, 1973.
Haeberli, W., Hallet, B., Arenson, L., Elconin, R., Humlum, O., Kääb, A., Kaufmann, V., Ladanyi, B., Matsuoka, N., Springman, S., and Mühll, D.V.: Permafrost creep and rock glacier dynamics, Permafrost Periglac., 17, 189–214, https://doi.org/10.1002/ppp.561, 2006.
Hartl, L., Zieher, T., Bremer, M., Stocker-Waldhuber, M., Zahs, V., Höfle, B., Klug, C., and Cicoira, A.: Multi-sensor monitoring and data integration reveal cyclical destabilization of the Äußeres Hochebenkar rock glacier, Earth Surf. Dynam., 11, 117–147, https://doi.org/10.5194/esurf-11-117-2023, 2023.
Hauck, C., Böttcher, M., and Maurer, H.: A new model for estimating subsurface ice content based on combined electrical and seismic data sets, The Cryosphere, 5, 453–468, https://doi.org/10.5194/tc-5-453-2011, 2011.
Hausmann, H., Krainer, K., Brückl, E., and Mostler, W.: Internal structure and ice content of Reichenkar rock glacier (Stubai Alps, Austria) assessed by geophysical investigations, Permafrost Periglac., 18, 351–367, https://doi.org/10.1002/ppp.601, 2007.
Hawker, L., Uhe, P., Paulo, L., Sosa, J., Savage, J., Sampson, C., and Neal, J.: A 30 m global map of elevation with forests and buildings removed, Environ. Res. Lett., 17, https://doi.org/10.1088/1748-9326/ac4d4f, 2022.
Herring, T., Lewkowicz, A. G., Hauck, C., Hilbich, C., Mollaret, C., Oldenborger, G. A., Uhlemann, S., Farzamian, M., Calmels, F., and Scandroglio, R.: Best practices for using electrical resistivity tomography to investigate permafrost, Permafrost Periglac., 34, 494–512, https://doi.org/10.1002/ppp.2207, 2023.
Hoelzle, M.: Permafrost occurrence from BTS measurements and climatic parameters in the eastern Swiss Alps, Permafrost Periglac., 3, 143–147, https://doi.org/10.1002/ppp.3430030212, 1992.
Hoelzle, M., Wegmann, M., and Krummenacher, B.: Miniature temperature dataloggers for mapping and monitoring of permafrost in high mountain areas: First experience from the Swiss Alps, Permafrost Periglac., 10, 113–124, https://doi.org/10.1002/(SICI)1099-1530(199904/06)10:2<113::AID-PPP317>3.0.CO;2-A, 1999.
Hu, Y., Arenson, L. U., Barboux, C., Bodin, X., Cicoira, A., Delaloye, R., Gärtner-Roer, I., Kääb, A., Kellerer-Pirklbauer, A., Lambiel, C., Liu, L., Pellet, C., Rouyet, L., Schoeneich, P., Seier, G., and Strozzi, T.: Rock glacier velocity: An Essential Climate Variable Quantity for Permafrost, Rev. Geophys., 63, e2024RG000847, https://doi.org/10.1029/2024RG000847, 2025.
Ishikawa, M., Fukui, K., Aoyama, M., Ikeda, A., Sawada, Y., and Matsuoka, N.: Mountain permafrost in Japan: Distribution, landforms and thermal regimes, Z. Geomorphol. Supp., 130, 99–116, 2003.
Kääb, A. and Røste, A.: Rock glaciers across the United States predominantly accelerate coincident with rise in air temperatures, Nat. Commun., 15, 7581, https://doi.org/10.1038/s41467-024-52093-z, 2024.
Kääb, A., Frauenfelder, R., and Roer, I.: On the response of rockglacier creep to surface temperature increase, Glob. Planet. Change, 56, 172–187, https://doi.org/10.1016/j.gloplacha.2006.07.005, 2007.
Kääb, A., Strozzi, T., Bolch, T., Caduff, R., Trefall, H., Stoffel, M., and Kokarev, A.: Inventory and changes of rock glacier creep speeds in Ile Alatau and Kungöy Ala-Too, northern Tien Shan, since the 1950s, The Cryosphere, 15, 927–949, https://doi.org/10.5194/tc-15-927-2021, 2021.
Kellerer-Pirklbauer, A.: Long-term monitoring of sporadic permafrost at the eastern margin of the European Alps (Hochreichart, Seckauer Tauern range, Austria), Permafrost Periglac., 30, 260–277, https://doi.org/10.1002/ppp.2021, 2019.
Kellerer-Pirklbauer, A., Wangensteen, B., Farbrot, H., and Etzelmüller, B.: Relative surface age-dating of rock glacier systems near Hólar in Hjaltadalur, northern Iceland, J. Quaternary Sci., 23, 137–151, https://doi.org/10.1002/jqs.1117, 2008.
Kellerer-Pirklbauer, A., Lieb, G. K., and Kaufmann, V.: Rock Glaciers in the Austrian Alps: A General Overview with a Special Focus on Dösen Rock Glacier, Hohe Tauern Range, in: Landscapes and Landforms of Austria, edited by: Embleton-Hamann, C., World Geomorphological Landscapes, Springer, Cham, 393–406, https://doi.org/10.1007/978-3-030-92815-5_27, 2022.
Kellerer-Pirklbauer, A., Bodin, X., Delaloye, R., Lambiel, C., Gärtner-Roer, I., Bonnefoy-Demongeot, M., Carturan, L., Damm, B., Eulenstein, J., Fischer, A., Hartl, L., Ikeda, A., Kaufmann, V., Krainer, K., Matsuoka, N., Di Cella, U. M., Noetzli, J., Seppi, R., Scapozza, C., Schoeneich, P., Stocker-Waldhuber, M., Thibert, E., and Zumiani, M.: Acceleration and interannual variability of creep rates in mountain permafrost landforms (rock glacier velocities) in the European Alps in 1995–2022, Environ. Res. Lett., 19, 034022, https://doi.org/10.1088/1748-9326/ad25a4, 2024.
Kenner, R., Pruessner, L., Beutel, J., Limpach, P., and Phillips, M.: How rock glacier hydrology, deformation velocities and ground temperatures interact: Examples from the Swiss Alps, Permafrost Periglac., 31, 3–14, https://doi.org/10.1002/ppp.2023, 2020.
LAKI II MNT: Agentia Nationala de Cadastru si Publicitate Imobiliara: Land Administration Knowledge Improvement, https://www.ancpi.ro/ (last acces: 1 September 2024), 2024.
Lambiel, C., Strozzi, T., Paillex, N., Vivero, S., and Jones, N.: Inventory and kinematics of active and transitional rock glaciers in the Southern Alps of New Zealand from Sentinel-1 InSAR, Arctic Antarct. Alp. Res., 55, 2183999, https://doi.org/10.1080/15230430.2023.2183999, 2023.
Lilleøren, K. S., Etzelmüller, B., Rouyet, L., Eiken, T., Slinde, G., and Hilbich, C.: Transitional rock glaciers at sea level in northern Norway, Earth Surf. Dynam., 10, 975–996, https://doi.org/10.5194/esurf-10-975-2022, 2022.
Liu, L., Millar, C. I., Westfall, R. D., and Zebker, H. A.: Surface motion of active rock glaciers in the Sierra Nevada, California, USA: inventory and a case study using InSAR, The Cryosphere, 7, 1109–1119, https://doi.org/10.5194/tc-7-1109-2013, 2013.
Marcer, M., Cicoira, A., Cusicanqui, D., Bodin, X., Echelard, T., Obregon, R., and Schoeneich, P.: Rock glaciers throughout the French Alps accelerated and destabilised since 1990 as air temperatures increased, Commun. Earth Environ., 2, https://doi.org/10.1038/s43247-021-00150-6, 2021.
Mollaret, C., Wagner, F. M., Hilbich, C., Scapozza, C., and Hauck, C.: Petrophysical Joint Inversion Applied to Alpine Permafrost Field Sites to Image Subsurface Ice, Water, Air, and Rock Contents, Front. Earth Sci., 8, 85, https://doi.org/10.3389/feart.2020.00085, 2020.
Necsoiu, M., Onaca, A., Wigginton, S., and Urdea, P.: Rock glacier dynamics in Southern Carpathian Mountains from high-resolution optical and multi-temporal SAR satellite imagery, Remote Sens. Environ., 177, 21–36, https://doi.org/10.1016/j.rse.2016.02.025, 2016.
Oliva, M., Fernandes, M., Palacios, D., Fernández-Fernández, J.M., Schimmelpfennig, I., Antoniades, D., Aumaître, G., Bourlès, D., and Keddadouche, K.: Rapid deglaciation during the Bølling-Allerød Interstadial in the Central Pyrenees and associated glacial and periglacial landforms, Geomorphology, 385, 107735, https://doi.org/10.1016/j.geomorph.2021.107735, 2021.
Onaca, A. L., Urdea, P., and Ardelean, A. C.: Internal structure and permafrost characteristics of the rock glaciers of Southern Carpathians (Romania) assessed by geoelectrical soundings and thermal monitoring, Geogr. Ann. A., 95, 249–266, https://doi.org/10.1111/geoa.12014, 2013.
Onaca, A., Ardelean, A. C., Urdea, P., Ardelean, F., and Sirbu, F.: Detection of mountain permafrost by combining conventional geophysical methods and thermal monitoring in the Retezat Mountains, Romania, Cold Reg. Sci. Technol., 119, 111–123, https://doi.org/10.1016/j.coldregions.2015.08.001, 2015.
Onaca, A., Urdea, P., Ardelean, A. C., Şerban, R., and Ardelean, F.: Present-day periglacial processes in the alpine zone, in: Landform Dynamics and Evolution in Romania, edited by: Rădoane, M. and Vespremeanu-Stroe, A., Springer Geography, 147–176, 2017a.
Onaca, A., Ardelean, F., Urdea, P., and Magori, B.: Southern Carpathian rock glaciers: Inventory, distribution and environmental controlling factors, Geomorphology, 293, 391–404, https://doi.org/10.1016/j.geomorph.2016.03.032, 2017b.
Onaca, A., Ardelean, F., Ardelean, A., Magori, B., Sîrbu, F., Voiculescu, M., and Gachev, E.: Assessment of permafrost conditions in the highest mountains of the Balkan Peninsula, Catena, 185, 104288, https://doi.org/10.1016/j.catena.2019.104288, 2020.
Onaca, A., Sirbu, F., Poncos, V., Hilbich, C., Strozzi, T., URDEA, P., Popescu, R.-A., Berzescu, O.-M., Etzelmüller, B., Vespremeanu-Stroe, A., Vasile, M., Teleagă, D., Birtaș, D., Filhol, S., Hegyi, A., and Ardelean, F.: Slow-moving rock glaciers in marginal periglacial environment of Southern Carpathians, In Slow-moving rock glaciers in marginal periglacial environment of Southern Carpathians, Zenodo [data set], https://doi.org/10.5281/zenodo.14544941, 2024.
Noetzli, J., Isaksen, K., Christiansen, H., Delaloye, R., Etzelmüller, B., Farinotti, D., Gallemann, T., Guglielmin, M., Hauck, C., Hilbich, C., Hoelzle, M., Lambiel, C., Magnin, F., Oliva, M., Paro, L., Pogliotti, P., Riedl, C., Schoeneich, P., Valt, M., Vieli, M., and Philips, M.: Enhanced warming of European mountain permafrost in the early 21st century, Nat. Commun., 15, 10508, https://doi.org/10.1038/s41467-024-54831-9, 2024.
Pavelescu, L.: Studiu geologic şi petrografic al regiunii centrale şi de sud-est a Munţilor Retezat [Geological and petrographic study of the central and south-eastern region of the Retezat Mountains], AIGR, XXV, 119–210, 1953.
Pandey, P., Nawaz Ali, S., Subhasmita Das, S., and Ataullah Raza Khan, M.: Rock glaciers of the semi-arid northwestern Himalayas: distribution, characteristics, and hydrological significance, Catena, 238, 107845, https://doi.org/10.1016/j.catena.2024.107845, 2024.
Pellet, C., Bodin, X., Cusicanqui, D., Delaloye, R., Kääb, A., Kaufmann, V., Thibert, E., Vivero, S., and Kellerer-Pirklbauer, A.: Rock glacier velocity, in: State of the Climate in 2023, Bull. Am. Meteorol. Soc., 105, 44–46, https://doi.org/10.1175/2024BAMSStateoftheClimate.1, 2024.
Poncoş, V., Stanciu, I., Teleagă, D., Maţenco, L., Bozsó, I., Szakács, A., Birtas, D., Toma, Ş. A., Stănică, A., and Rădulescu, V.: An Integrated Platform for Ground-Motion Mapping, Local to Regional Scale, Examples from SE Europe, Remote Sens-Basel., 14, 1046, https://doi.org/10.3390/rs14041046, 2022.
Popescu, R., Vespremeanu-Stroe, A., Onaca, A., and Cruceru, N.: Permafrost research in the granitic massifs of Southern Carpathians (Parâng Mountains), Z. Geomorphol., 59, 1–20, doi.org/10.1127/0372-8854/2014/0145, 2015.
Popescu, R., Onaca, A., Urdea, P., and Vespremeanu-Stroe, A.: Spatial Distribution and Main Characteristics of Alpine Permafrost from Southern Carpathians, Romania, edited by: Rădoane, M. and Vespremeanu-Stroe, A., Landform dynamics and evolution in Romania, Springer, 117–146, https://doi.org/10.1007/978-3-319-32589-7_6, 2017.
Popescu, R., Filhol, S., Etzelmüller, B., Vasile, M., Pleşoianu, A., Vîrghileanu, M., Onaca, A., Şandric, I., Săvulescu, I., Cruceru, N., Vespremeanu-Stroe, A., Westermann, S., Sîrbu, F., Mihai, B., Nedelea, A., and Gascoin, S.: Permafrost Distribution in the Southern Carpathians, Romania, Derived From Machine Learning Modeling, Permafrost Periglac., 35, 243–261, https://doi.org/10.1002/ppp.2232, 2024.
Rangecroft, S., Harrison, S., and Anderson, K.: Rock glaciers as water stores in the Bolivian Andes: An assessment of their hydrological importance, Arct. Antarct. Alp. Res., 47, 89–98, https://doi.org/10.1657/AAAR0014-029, 2015.
RGIK: Guidelines for inventorying rock glaciers: baseline and practical concepts (version 1.0), IPA Action Group Rock glacier inventories and kinematics, 25, https://doi.org/10.51363/unifr.srr.2023.002, 2023a.
RGIK: InSAR-based kinematic attribute in rock glacier inventories. Practical InSAR Guidelines (version 4.0., 31.05.2023), IPA Action Group Rock Glacier Inventories and Kinematics (RGIK), 33 pp., https://www.rgik.org (last access: 8 August 2025), 2023b.
Roer, I., Haeberli, W., Avian, M., Kaufmann, V., Delaloye, R., Lambiel, C., and Kääb, A.: Observations and considerations on destabilizing active rock glaciers in the European Alps, in: Proc. Ninth Int. Conf. on Permafrost, Fairbanks, Alaska, 29 June–3 July 2008, edited by: Kane, D. L. and Hinkel, K. M., Institute of Northern Engineering, University of Alaska, 1505–1510, 2008.
Rouyet, L., Lilleoren, K. S., Boehme, M., Vick, L. M., Delaloye, R., Etzelmüller, B., Lauknes, T. R., Larsen, Y., and Blikra, L. H.: Regional Morpho-Kinematic Inventory of Slope Movements in Northern Norway, Front. Earth Sci., 9, 681088, https://doi.org/10.3389/feart.2021.681088, 2021.
Rucci, A., Ferretti, A., Monti Guarnieri, A., and Rocca, F.: Sentinel 1 SAR interferometry applications: The outlook for sub millimeter measurements, Remote Sens. Environ., 120, 156–163, https://doi.org/10.1016/j.rse.2011.09.030, 2012.
Rücker, C., Günther, T., and Wagner, F. M.: pyGIMLi: An open-source library for modelling and inversion in geophysics, Comput. Geosci., 109, 106–123, https://doi.org/10.1016/j.cageo.2017.07.011, 2017.
Ruszkiczay-Rüdiger, Z., Kern, Z., Urdea, P., Madarász, B., Braucher, R., and ASTER Team: Limited glacial erosion during the last glaciation in mid-latitude cirques (Retezat Mts, Southern Carpathians, Romania), Geomorphology, 384, 107719, https://doi.org/10.1016/j.geomorph.2021.107719, 2021.
Sandmeier, K.-J.: REFLEXW Version 9.1.3. Windows™XP/7/8/10-program for the processing of seismic, acoustic or electromagnetic reflection, refraction and transmission data, 2020.
Santos-González, J., González-Gutiérrez, R. B., Redondo-Vega, J. M., Gómez-Villar, A., Jomelli, V., Fernández-Fernández, J. M., Andrés, N., García-Ruiz, J. M., Peña-Pérez, S. A., Melón-Nava, A., Oliva, M., Álvarez-Martínez, J., Charton, J., ASTER Team, and Palacios, D.: The origin and collapse of rock glaciers during the Bølling-Allerød interstadial: A new study case from the Cantabrian Mountains (Spain), Geomorphology, 401, 108112, https://doi.org/10.1016/j.geomorph.2022.108112, 2022.
Sattler, K., Anderson, B., Mackintosh, A., Norton, K., and de Róiste, M.: Estimating permafrost distribution in the maritime Southern Alps, New Zealand, based on climatic conditions at rock glacier sites, Front. Earth Sci., 4, https://doi.org/10.3389/feart.2016.00004, 2016.
Schoeneich, P.: Guide lines for monitoring GST – Ground surface temperature, PERMANET project, Version 3 – 2.2.2011, https://www.permanet-alpinespace.eu/archive/pdf/GST.pdf (last access: 20 April 2025), 2011.
Serrano, E., de Sanjosé, J. J., and González-Trueba, J. J.: Rock glacier dynamics in marginal periglacial environments, Earth Surf. Proc. Land., 35, 1302–1314, https://doi.org/10.1002/esp.1972, 2010.
Steinemann, O., Reitner, J. M., Ivy-Ochs, S., Christl, M., and Synal, H.-A.: Tracking rockglacier evolution in the Eastern Alps from the Lateglacial to the early Holocene, Quaternary Sci. Rev., 241, 106424, https://doi.org/10.1016/j.quascirev.2020.106424, 2020.
Stiegler, C., Rode, M., Sass, O., and Otto, J.C.: An Undercooled Scree Slope Detected by Geophysical Investigations in Sporadic Permafrost below 1000 M ASL, Central Austria, Permafrost Periglac., 25, 194–207, https://doi.org/10.1002/ppp.1813, 2014.
Strozzi, T., Caduff, R., Jones, N., Barboux, C., Delaloye, R., Bodin, X., Kääb, A., Mätzler, E., and Schrott, L.: Monitoring rock glacier kinematics with satellite synthetic aperture radar, Remote Sens-Basel., 12, 559, https://doi.org/10.3390/rs12030559, 2020.
Timur, A.: Velocity of compressional waves in porous media at permafrost temperatures, Geophysics, 33, 584–595, https://doi.org/10.1190/1.1439954, 1968.
Urdea, P.: Permafrost and periglacial forms in the Romanian Carpathians, in: 6th International Conference on Permafrost, South China University of Technology, Beijing, China, 631–637, 1993.
Urdea, P.: Munţii Retezat, Studiu geomorfologic [Retezat Mountains. A geomorphological study], Academiei, Bucureşti, 272 pp., ISBN 973-27-0767-4, 2000.
Vespremeanu-Stroe, A., Urdea, P., Popescu, R., and Vasile, M.: Rock Glacier Activity in the Retezat Mountains, Southern Carpathians, Romania, Permafrost Periglac., 23, 127–137, https://doi.org/10.1002/ppp.1736, 2012.
Vonder Mühll, D., Hauck, C., and Gubler, H.: Mapping of mountain permafrost using geophysical methods, Prog. Phys. Geog., 26, 643–660, https://doi.org/10.1191/0309133302pp356ra, 2002.
Wagner, F. M., Mollaret, C., Günther, T., Kemna, A., and Hauck, C.: Quantitative imaging of water, ice and air in permafrost systems through petrophysical joint inversion of seismic refraction and electrical resistivity data, Geophys. J. Int., 219, 1866–1875, https://doi.org/10.1093/gji/ggz402, 2019.
Wagner, T., Seelig, S., Helfricht, K., Fischer, A., Avian, M., Krainer, K., and Winkler, G.: Assessment of liquid and solid water storage in rock glaciers versus glacier ice in the Austrian Alps, Sci. Total Environ., 800, 149593, https://doi.org/10.1016/j.scitotenv.2021.149593, 2021.
Wicky, J. and Hauck, C.: Numerical modelling of convective heat transport by air flow in permafrost talus slopes, The Cryosphere, 11, 1311–1325, https://doi.org/10.5194/tc-11-1311-2017, 2017.
Wirz, V., Gruber, S., Purves, R. S., Beutel, J., Gärtner-Roer, I., Gubler, S., and Vieli, A.: Short-term velocity variations at three rock glaciers and their relationship with meteorological conditions, Earth Surf. Dynam., 4, 103–123, https://doi.org/10.5194/esurf-4-103-2016, 2016.
Yu, J., Meng, X., Yan, B., Xu, B., Fan, Q., and Xie, Y.: Global Navigation Satellite System-based positioning technology for structural health monitoring: a review, Struct. Control. Hlth., 27, 2467, https://doi.org/10.1002/stc.2467, 2020.
Short summary
This study establishes a methodology for the study of slow-moving rock glaciers in marginal permafrost and provides the basic knowledge for understanding rock glaciers in South East Europe. By using a combination of different methods (remote sensing, geophysical survey, thermal measurements), we found out that, on the transitional rock glaciers, low ground ice content (i.e. below 20 %) produces horizontal displacements of up to 3 cm per year.
This study establishes a methodology for the study of slow-moving rock glaciers in marginal...
