Articles | Volume 10, issue 5
https://doi.org/10.5194/esurf-10-975-2022
© Author(s) 2022. 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-10-975-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
17 Oct 2022
Research article |
| 17 Oct 2022
| 17 Oct 2022
Transitional rock glaciers at sea level in northern Norway
Karianne S. Lilleøren
CORRESPONDING AUTHOR
Department of Geosciences, University of Oslo, Oslo, 0316, Norway
Bernd Etzelmüller
Department of Geosciences, University of Oslo, Oslo, 0316, Norway
Line Rouyet
NORCE Norwegian Research Centre AS, Tromsø, 9294, Norway
Trond Eiken
Department of Geosciences, University of Oslo, Oslo, 0316, Norway
Gaute Slinde
Department of Geosciences, University of Oslo, Oslo, 0316, Norway
Christin Hilbich
Department of Geosciences, University of Fribourg, Fribourg, 1700,
Switzerland
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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.
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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
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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.
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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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Preprint archived
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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.
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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.
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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.
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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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.
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.
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.
Juditha Undine Schmidt, Bernd Etzelmüller, Thomas Vikhamar Schuler, Florence Magnin, Julia Boike, Moritz Langer, and Sebastian Westermann
The Cryosphere, 15, 2491–2509, https://doi.org/10.5194/tc-15-2491-2021, https://doi.org/10.5194/tc-15-2491-2021, 2021
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This study presents rock surface temperatures (RSTs) of steep high-Arctic rock walls on Svalbard from 2016 to 2020. The field data show that coastal cliffs are characterized by warmer RSTs than inland locations during winter seasons. By running model simulations, we analyze factors leading to that effect, calculate the surface energy balance and simulate different future scenarios. Both field data and model results can contribute to a further understanding of RST in high-Arctic rock walls.
Christian Halla, Jan Henrik Blöthe, Carla Tapia Baldis, Dario Trombotto Liaudat, Christin Hilbich, Christian Hauck, and Lothar Schrott
The Cryosphere, 15, 1187–1213, https://doi.org/10.5194/tc-15-1187-2021, https://doi.org/10.5194/tc-15-1187-2021, 2021
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In the semi-arid to arid Andes of Argentina, rock glaciers contain invisible and unknown amounts of ground ice that could become more important in future for the water availability during the dry season. The study shows that the investigated rock glacier represents an important long-term ice reservoir in the dry mountain catchment and that interannual changes of ground ice can store and release significant amounts of annual precipitation.
Maximilian Weigand, Florian M. Wagner, Jonas K. Limbrock, Christin Hilbich, Christian Hauck, and Andreas Kemna
Geosci. Instrum. Method. Data Syst., 9, 317–336, https://doi.org/10.5194/gi-9-317-2020, https://doi.org/10.5194/gi-9-317-2020, 2020
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In times of global warming, permafrost is starting to degrade at alarming rates, requiring new and improved characterization approaches. We describe the design and test installation, as well as detailed data quality assessment, of a monitoring system used to capture natural electrical potentials in the subsurface. These self-potential signals are of great interest for the noninvasive investigation of water flow in the non-frozen or partially frozen subsurface.
Florence Magnin, Bernd Etzelmüller, Sebastian Westermann, Ketil Isaksen, Paula Hilger, and Reginald L. Hermanns
Earth Surf. Dynam., 7, 1019–1040, https://doi.org/10.5194/esurf-7-1019-2019, https://doi.org/10.5194/esurf-7-1019-2019, 2019
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This study proposes the first permafrost (i.e. ground with temperature permanently < 0 °C) map covering the steep rock slopes of Norway. It was created by using rock temperature data collected at the near surface of 25 rock walls spread across the country between 2010 and 2018. The map shows that permafrost mostly exists above 1300–1400 m a.s.l. in southern Norway and close to sea level in northern Norway. The results have strong potential for the study of rock wall sliding and failure.
Coline Mollaret, Christin Hilbich, Cécile Pellet, Adrian Flores-Orozco, Reynald Delaloye, and Christian Hauck
The Cryosphere, 13, 2557–2578, https://doi.org/10.5194/tc-13-2557-2019, https://doi.org/10.5194/tc-13-2557-2019, 2019
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We present a long-term multisite electrical resistivity tomography monitoring network (more than 1000 datasets recorded from six mountain permafrost sites). Despite harsh and remote measurement conditions, the datasets are of good quality and show consistent spatio-temporal variations yielding significant added value to point-scale borehole information. Observed long-term trends are similar for all permafrost sites, showing ongoing permafrost thaw and ground ice loss due to climatic conditions.
Benjamin Mewes, Christin Hilbich, Reynald Delaloye, and Christian Hauck
The Cryosphere, 11, 2957–2974, https://doi.org/10.5194/tc-11-2957-2017, https://doi.org/10.5194/tc-11-2957-2017, 2017
Sebastian Westermann, Maria Peter, Moritz Langer, Georg Schwamborn, Lutz Schirrmeister, Bernd Etzelmüller, and Julia Boike
The Cryosphere, 11, 1441–1463, https://doi.org/10.5194/tc-11-1441-2017, https://doi.org/10.5194/tc-11-1441-2017, 2017
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We demonstrate a remote-sensing-based scheme estimating the evolution of ground temperature and active layer thickness by means of a ground thermal model. A comparison to in situ observations from the Lena River delta in Siberia indicates that the model is generally capable of reproducing the annual temperature regime and seasonal thawing of the ground. The approach could hence be a first step towards remote detection of ground thermal conditions in permafrost areas.
Luc Girod, Christopher Nuth, Andreas Kääb, Bernd Etzelmüller, and Jack Kohler
The Cryosphere, 11, 827–840, https://doi.org/10.5194/tc-11-827-2017, https://doi.org/10.5194/tc-11-827-2017, 2017
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While gathering data on a changing environment is often a costly and complicated endeavour, it is also the backbone of all research. What if one could measure elevation change by just strapping a camera and a hiking GPS under an helicopter or a small airplane used for transportation and gather data on the ground bellow the flight path? In this article, we present a way to do exactly that and show an example survey where it helped compute the volume of ice lost by a glacier in Svalbard.
Amund F. Borge, Sebastian Westermann, Ingvild Solheim, and Bernd Etzelmüller
The Cryosphere, 11, 1–16, https://doi.org/10.5194/tc-11-1-2017, https://doi.org/10.5194/tc-11-1-2017, 2017
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Palsas and peat plateaus are permafrost landforms in subarctic mires which constitute sensitive ecosystems with strong significance for vegetation, wildlife, hydrology and carbon cycle. We have systematically mapped the occurrence of palsas and peat plateaus in northern Norway by interpretation of aerial images from the 1950s until today. The results show that about half of the area of palsas and peat plateaus has disappeared due to lateral erosion and melting of ground ice in the last 50 years.
Antoine Marmy, Jan Rajczak, Reynald Delaloye, Christin Hilbich, Martin Hoelzle, Sven Kotlarski, Christophe Lambiel, Jeannette Noetzli, Marcia Phillips, Nadine Salzmann, Benno Staub, and Christian Hauck
The Cryosphere, 10, 2693–2719, https://doi.org/10.5194/tc-10-2693-2016, https://doi.org/10.5194/tc-10-2693-2016, 2016
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This paper presents a new semi-automated method to calibrate the 1-D soil model COUP. It is the first time (as far as we know) that this approach is developed for mountain permafrost. It is applied at six test sites in the Swiss Alps. In a second step, the calibrated model is used for RCM-based simulations with specific downscaling of RCM data to the borehole scale. We show projections of the permafrost evolution at the six sites until the end of the century and according to the A1B scenario.
Kjersti Gisnås, Sebastian Westermann, Thomas Vikhamar Schuler, Kjetil Melvold, and Bernd Etzelmüller
The Cryosphere, 10, 1201–1215, https://doi.org/10.5194/tc-10-1201-2016, https://doi.org/10.5194/tc-10-1201-2016, 2016
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In wind exposed areas snow redistribution results in large spatial variability in ground temperatures. In these areas, the ground temperature of a grid cell must be determined based on the distribution, and not the average, of snow depths. We employ distribution functions of snow in a regional permafrost model, showing highly improved representation of ground temperatures. By including snow distributions, we find the permafrost area to be nearly twice as large as what is modelled without.
S. Westermann, M. Langer, J. Boike, M. Heikenfeld, M. Peter, B. Etzelmüller, and G. Krinner
Geosci. Model Dev., 9, 523–546, https://doi.org/10.5194/gmd-9-523-2016, https://doi.org/10.5194/gmd-9-523-2016, 2016
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Thawing of permafrost is governed by a complex interplay of different processes, of which only conductive heat transfer is taken into account in most model studies. We present a new land-surface scheme designed for permafrost applications, CryoGrid 3, which constitutes a flexible platform to explore new parameterizations for a range of permafrost processes.
S. Westermann, T. I. Østby, K. Gisnås, T. V. Schuler, and B. Etzelmüller
The Cryosphere, 9, 1303–1319, https://doi.org/10.5194/tc-9-1303-2015, https://doi.org/10.5194/tc-9-1303-2015, 2015
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We use remotely sensed land surface temperature and land cover in conjunction with air temperature and snowfall from a reanalysis product as input for a simple permafrost model. The scheme is applied to the permafrost regions bordering the North Atlantic. A comparison with ground temperatures in boreholes suggests a modeling accuracy of 2 to 2.5 °C.
K. Gisnås, S. Westermann, T. V. Schuler, T. Litherland, K. Isaksen, J. Boike, and B. Etzelmüller
The Cryosphere, 8, 2063–2074, https://doi.org/10.5194/tc-8-2063-2014, https://doi.org/10.5194/tc-8-2063-2014, 2014
S. Westermann, T. V. Schuler, K. Gisnås, and B. Etzelmüller
The Cryosphere, 7, 719–739, https://doi.org/10.5194/tc-7-719-2013, https://doi.org/10.5194/tc-7-719-2013, 2013
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Overdeepening or tunnel valley of the Aare glacier on the northern margin of the European Alps: Basins, riegels, and slot canyons
Stream hydrology controls on ice cliff evolution and survival on debris-covered glaciers
Time-varying drainage basin development and erosion on volcanic edifices
Geomorphic risk maps for river migration using probabilistic modeling – a framework
Evolution of submarine canyons and hanging-wall fans: insights from geomorphic experiments and morphodynamic models
Riverine sediment response to deforestation in the Amazon basin
Physical modeling of ice-sheet-induced salt movements using the example of northern Germany
Geometric constraints on tributary fluvial network junction angles
A new dunetracking tool to support input parameter selection and uncertainty analyses using a Monte Carlo approach
Downstream rounding rate of pebbles in the Himalaya
Post-fire Variability in Sediment Transport by Ravel in the Diablo Range
Landscape response to tectonic deformation and cyclic climate change since ca. 800 ka in the southern Central Andes
Examination of Analytical Shear Stress Predictions for Coastal Dune Evolution
A physics-based model for fluvial valley width
Implications for the resilience of modern coastal systems derived from mesoscale barrier dynamics at Fire Island, New York
Quantifying the migration rate of drainage divides from high-resolution topographic data
Long-term monitoring (1953–2019) of geomorphologically active sections of Little Ice Age lateral moraines in the context of changing meteorological conditions
Coevolving edge rounding and shape of glacial erratics: the case of Shap granite, UK
A simple model for faceted topographies at normal faults based on an extended stream-power law
Dimensionless argument: a narrow grain size range near 2 mm plays a special role in river sediment transport and morphodynamics
Path length and sediment transport estimation from DEMs of difference: a signal processing approach
A numerical model for duricrust formation by water table fluctuations
Influence of cohesive clay on wave–current ripple dynamics captured in a 3D phase diagram
Statistical characterization of erosion and sediment transport mechanics in shallow tidal environments – Part 1: Erosion dynamics
Statistical characterization of erosion and sediment transport mechanics in shallow tidal environments – Part 2: Suspended sediment dynamics
Geomorphological and hydrological controls on sediment export in earthquake-affected catchments in the Nepal Himalaya
Optimization of passive acoustic bedload monitoring in rivers by signal inversion
Stochastic properties of coastal flooding events – Part 2: Probabilistic analysis
Field monitoring of pore water pressure in fully and partly saturated debris flows at Ohya landslide scar, Japan
Analysis of autogenic bifurcation processes resulting in river avulsion
Evidence of slow millennial cliff retreat rates using cosmogenic nuclides in coastal colluvium
Bedload transport fluctuations, flow conditions, and disequilibrium ratio at the Swiss Erlenbach stream: results from 27 years of high-resolution temporal measurements
Stochastic properties of coastal flooding events – Part 1: convolutional-neural-network-based semantic segmentation for water detection
Coexistence of two dune scales in a lowland river
Justin A. Nghiem, Gen K. Li, Joshua P. Harringmeyer, Gerard Salter, Cédric G. Fichot, Luca Cortese, and Michael P. Lamb
Earth Surf. Dynam., 12, 1267–1294, https://doi.org/10.5194/esurf-12-1267-2024, https://doi.org/10.5194/esurf-12-1267-2024, 2024
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Fine sediment grains in freshwater can cohere into faster-settling particles called flocs, but floc settling velocity theory has not been fully validated. Combining three data sources in novel ways in the Wax Lake Delta, we verified a semi-empirical model relying on turbulence and geochemical factors. For a physics-based model, we showed that the representative grain diameter within flocs relies on floc structure and that heterogeneous flow paths inside flocs increase floc settling velocity.
Jessica Marggraf, Guillaume Dramais, Jérôme Le Coz, Blaise Calmel, Benoît Camenen, David J. Topping, William Santini, Gilles Pierrefeu, and François Lauters
Earth Surf. Dynam., 12, 1243–1266, https://doi.org/10.5194/esurf-12-1243-2024, https://doi.org/10.5194/esurf-12-1243-2024, 2024
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Suspended-sand fluxes in rivers vary with time and space, complicating their measurement. The proposed method captures the vertical and lateral variations of suspended-sand concentration throughout a river cross-section. It merges water samples taken at various positions throughout the cross-section with high-resolution acoustic velocity measurements. This is the first method that includes a fully applicable uncertainty estimation; it can easily be applied to any other study sites.
Dominic T. Robson and Andreas C. W. Baas
Earth Surf. Dynam., 12, 1205–1226, https://doi.org/10.5194/esurf-12-1205-2024, https://doi.org/10.5194/esurf-12-1205-2024, 2024
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Barchans are fast-moving sand dunes which form large populations (swarms) on Earth and Mars. We show that a small range of model parameters produces swarms in which dune size does not vary downwind – something that is observed in nature but not when using earlier models. We also show how the shape of dunes and the spatial patterns they form are affected by wind direction. This work furthers our understanding of the interplay between environmental drivers, dune interactions, and swarm properties.
Jeffrey Keck, Erkan Istanbulluoglu, Benjamin Campforts, Gregory Tucker, and Alexander Horner-Devine
Earth Surf. Dynam., 12, 1165–1191, https://doi.org/10.5194/esurf-12-1165-2024, https://doi.org/10.5194/esurf-12-1165-2024, 2024
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MassWastingRunout (MWR) is a new landslide runout model designed for sediment transport, landscape evolution, and hazard assessment applications. MWR is written in Python and includes a calibration utility that automatically determines best-fit parameters for a site and empirical probability density functions of each parameter for probabilistic model implementation. MWR and Jupyter Notebook tutorials are available as part of the Landlab package at https://github.com/landlab/landlab.
Ariane Mueting and Bodo Bookhagen
Earth Surf. Dynam., 12, 1121–1143, https://doi.org/10.5194/esurf-12-1121-2024, https://doi.org/10.5194/esurf-12-1121-2024, 2024
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This study investigates the use of optical PlanetScope data for offset tracking of the Earth's surface movement. We found that co-registration accuracy is locally degraded when outdated elevation models are used for orthorectification. To mitigate this bias, we propose to only correlate scenes acquired from common perspectives or base orthorectification on more up-to-date elevation models generated from PlanetScope data alone. This enables a more detailed analysis of landslide dynamics.
Cho-Hee Lee, Yeong Bae Seong, John Weber, Sangmin Ha, Dong-Eun Kim, and Byung Yong Yu
Earth Surf. Dynam., 12, 1091–1120, https://doi.org/10.5194/esurf-12-1091-2024, https://doi.org/10.5194/esurf-12-1091-2024, 2024
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Topographic metrics were used to understand changes due to tectonic activity. We evaluated the relative tectonic activity along the Ulsan Fault Zone (UFZ), one of the most active fault zones in South Korea. We divided the UFZ into five segments, based on the spatial variation in activity. We modeled the landscape evolution of the study area and interpreted tectono-geomorphic history during which the northern part of the UFZ experienced asymmetric uplift, while the southern part did not.
Juditha Aga, Livia Piermattei, Luc Girod, Kristoffer Aalstad, Trond Eiken, Andreas Kääb, and Sebastian Westermann
Earth Surf. Dynam., 12, 1049–1070, https://doi.org/10.5194/esurf-12-1049-2024, https://doi.org/10.5194/esurf-12-1049-2024, 2024
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Coastal rock cliffs on Svalbard are considered to be fairly stable; however, long-term trends in coastal-retreat rates remain unknown. This study examines changes in the coastline position along Brøggerhalvøya, Svalbard, using aerial images from 1970, 1990, 2010, and 2021. Our analysis shows that coastal-retreat rates accelerate during the period 2010–2021, which coincides with increasing storminess and retreating sea ice.
Aaron T. Steelquist, Gustav B. Seixas, Mary L. Gillam, Sourav Saha, Seulgi Moon, and George E. Hilley
Earth Surf. Dynam., 12, 1071–1089, https://doi.org/10.5194/esurf-12-1071-2024, https://doi.org/10.5194/esurf-12-1071-2024, 2024
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The rates at which rivers erode their bed can be used to interpret the geologic history of a region. However, these rates depend significantly on the time window over which you measure. We use multiple dating methods to determine an incision rate for the San Juan River and compare it to regional rates with longer timescales. We demonstrate how specific geologic events, such as cutoffs of bedrock meander bends, are likely to preserve material we can date but also bias the rates we measure.
Johannes Leinauer, Michael Dietze, Sibylle Knapp, Riccardo Scandroglio, Maximilian Jokel, and Michael Krautblatter
Earth Surf. Dynam., 12, 1027–1048, https://doi.org/10.5194/esurf-12-1027-2024, https://doi.org/10.5194/esurf-12-1027-2024, 2024
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Massive rock slope failures are a significant alpine hazard and change the Earth's surface. Therefore, we must understand what controls the preparation of such events. By correlating 4 years of slope displacements with meteorological and seismic data, we found that water from rain and snowmelt is the most important driver. Our approach is applicable to similar sites and indicates where future climatic changes, e.g. in rain intensity and frequency, may alter the preparation of slope failure.
Julien Coatléven and Benoit Chauveau
Earth Surf. Dynam., 12, 995–1026, https://doi.org/10.5194/esurf-12-995-2024, https://doi.org/10.5194/esurf-12-995-2024, 2024
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The aim of this paper is to explain how to incorporate classical water flow routines into landscape evolution models while keeping numerical errors under control. The key idea is to adapt filtering strategies to eliminate anomalous numerical errors and mesh dependencies, as confirmed by convergence tests with analytic solutions. The emergence of complex geomorphic structures is now driven exclusively by nonlinear heterogeneous physical processes rather than by random numerical artifacts.
Jingjuan Li, John D. Jansen, Xuanmei Fan, Zhiyong Ding, Shugang Kang, and Marco Lovati
Earth Surf. Dynam., 12, 953–971, https://doi.org/10.5194/esurf-12-953-2024, https://doi.org/10.5194/esurf-12-953-2024, 2024
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In this study, we investigated the geomorphology, sedimentology, and chronology of Tuanjie (seven terraces) and Taiping (three terraces) terraces in Diexi, eastern Tibetan Plateau. Results highlight that two damming and three outburst events occurred in the area during the late Pleistocene, and the outburst floods have been a major factor in the formation of tectonically active mountainous river terraces. Tectonic activity and climatic changes play a minor role.
Andrew Hollyday, Maureen E. Raymo, Jacqueline Austermann, Fred Richards, Mark Hoggard, and Alessio Rovere
Earth Surf. Dynam., 12, 883–905, https://doi.org/10.5194/esurf-12-883-2024, https://doi.org/10.5194/esurf-12-883-2024, 2024
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Sea level was significantly higher during the Pliocene epoch, around 3 million years ago. The present-day elevations of shorelines that formed in the past provide a data constraint on the extent of ice sheet melt and the global sea level response under warm Pliocene conditions. In this study, we identify 10 escarpments that formed from wave-cut erosion during Pliocene times and compare their elevations with model predictions of solid Earth deformation processes to estimate past sea level.
Gregory A. Ruetenik, Ken L. Ferrier, and Odin Marc
Earth Surf. Dynam., 12, 863–881, https://doi.org/10.5194/esurf-12-863-2024, https://doi.org/10.5194/esurf-12-863-2024, 2024
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Fluvial sediment fluxes increased dramatically in Taiwan during Typhoon Morakot in 2009, which produced some of the heaviest landsliding on record. We analyzed fluvial discharge and suspended sediment concentration data at 87 gauging stations across Taiwan to quantify fluvial sediment responses since Morakot. In basins heavily impacted by landsliding, rating curve coefficients sharply increased during Morakot and then declined exponentially with a characteristic decay time of <10 years.
Nil Carrion-Bertran, Albert Falqués, Francesca Ribas, Daniel Calvete, Rinse de Swart, Ruth Durán, Candela Marco-Peretó, Marta Marcos, Angel Amores, Tim Toomey, Àngels Fernández-Mora, and Jorge Guillén
Earth Surf. Dynam., 12, 819–839, https://doi.org/10.5194/esurf-12-819-2024, https://doi.org/10.5194/esurf-12-819-2024, 2024
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The sensitivity to the wave and sea-level forcing sources in predicting a 6-month embayed beach evolution is assessed using two different morphodynamic models. After a successful model calibration using in situ data, other sources are applied. The wave source choice is critical: hindcast data provide wrong results due to an angle bias, whilst the correct dynamics are recovered with the wave conditions from an offshore buoy. The use of different sea-level sources gives no significant differences.
Jean Vérité, Clément Narteau, Olivier Rozier, Jeanne Alkalla, Laurie Barrier, and Sylvain Courrech du Pont
EGUsphere, https://doi.org/10.5194/egusphere-2024-1634, https://doi.org/10.5194/egusphere-2024-1634, 2024
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Using a numerical model in 2D, we study how two identical dunes interact with each other when exposed to reversing winds. Depending on the distance between the dunes, they either repel or attract each other until they reach an equilibrium distance, which is controlled by the wind strength, wind reversal frequency and dune size. This process is controlled by the modification of wind flow over dunes of various shape, influencing the sediment transport downstream.
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.
Fritz Schlunegger, Edi Kissling, Dimitri Tibo Bandou, Guilhem Amin Douillet, David Mair, Urs Marti, Regina Reber, Patrick Fabian Schläfli, and Michael Alfred Schwenk
EGUsphere, https://doi.org/10.5194/egusphere-2024-683, https://doi.org/10.5194/egusphere-2024-683, 2024
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Overdeepenings are bedrock depressions filled with sediment. We combine the results of a gravity survey with drilling data to explore the morphology of such a depression beneath the city of Bern. We find that the target overdeepening comprises two basins >200 m deep. They are separated by a bedrock riegel that itself is cut by narrow canyons up to 150 m deep. We postulate that these structures formed underneath a glacier, where erosion by subglacial meltwater caused the formation of the canyons.
Eric Petersen, Regine Hock, and Michael G. Loso
Earth Surf. Dynam., 12, 727–745, https://doi.org/10.5194/esurf-12-727-2024, https://doi.org/10.5194/esurf-12-727-2024, 2024
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Ice cliffs are melt hot spots that increase melt rates on debris-covered glaciers which otherwise see a reduction in melt rates. In this study, we show how surface runoff streams contribute to the generation, evolution, and survival of ice cliffs by carving into the glacier and transporting rocky debris. On Kennicott Glacier, Alaska, 33 % of ice cliffs are actively influenced by streams, while nearly half are within 10 m of streams.
Daniel O'Hara, Liran Goren, Roos M. J. van Wees, Benjamin Campforts, Pablo Grosse, Pierre Lahitte, Gabor Kereszturi, and Matthieu Kervyn
Earth Surf. Dynam., 12, 709–726, https://doi.org/10.5194/esurf-12-709-2024, https://doi.org/10.5194/esurf-12-709-2024, 2024
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Understanding how volcanic edifices develop drainage basins remains unexplored in landscape evolution. Using digital evolution models of volcanoes with varying ages, we quantify the geometries of their edifices and associated drainage basins through time. We find that these metrics correlate with edifice age and are thus useful indicators of a volcano’s history. We then develop a generalized model for how volcano basins develop and compare our results to basin evolution in other settings.
Brayden Noh, Omar Wani, Kieran B. J. Dunne, and Michael P. Lamb
Earth Surf. Dynam., 12, 691–708, https://doi.org/10.5194/esurf-12-691-2024, https://doi.org/10.5194/esurf-12-691-2024, 2024
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In this paper, we propose a framework for generating risk maps that provide the probabilities of erosion due to river migration. This framework uses concepts from probability theory to learn the river migration model's parameter values from satellite data while taking into account parameter uncertainty. Our analysis shows that such geomorphic risk estimation is more reliable than models that do not explicitly consider various sources of variability and uncertainty.
Steven Y. J. Lai, David Amblas, Aaron Micallef, and Hervé Capart
Earth Surf. Dynam., 12, 621–640, https://doi.org/10.5194/esurf-12-621-2024, https://doi.org/10.5194/esurf-12-621-2024, 2024
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This study explores the creation of submarine canyons and hanging-wall fans on active faults, which can be defined by gravity-dominated breaching and underflow-dominated diffusion processes. The study reveals the self-similarity in canyon–fan long profiles, uncovers Hack’s scaling relationship and proposes a formula to estimate fan volume using canyon length. This is validated by global data from source-to-sink systems, providing insights into deep-water sedimentary processes.
Anuska Narayanan, Sagy Cohen, and John R. Gardner
Earth Surf. Dynam., 12, 581–599, https://doi.org/10.5194/esurf-12-581-2024, https://doi.org/10.5194/esurf-12-581-2024, 2024
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This study investigates the profound impact of deforestation in the Amazon on sediment dynamics. Novel remote sensing data and statistical analyses reveal significant changes, especially in heavily deforested regions, with rapid effects within a year. In less disturbed areas, a 1- to 2-year lag occurs, influenced by natural sediment shifts and human activities. These findings highlight the need to understand the consequences of human activity for our planet's future.
Jacob Hardt, Tim P. Dooley, and Michael R. Hudec
Earth Surf. Dynam., 12, 559–579, https://doi.org/10.5194/esurf-12-559-2024, https://doi.org/10.5194/esurf-12-559-2024, 2024
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We investigate the reaction of salt structures on ice sheet transgressions. We used a series of sandbox models that enabled us to experiment with scaled-down versions of salt bodies from northern Germany. The strongest reactions occurred when large salt pillows were partly covered by the ice load. Subsurface salt structures may play an important role in the energy transition, e.g., as energy storage. Thus, it is important to understand all processes that affect their stability.
Jon D. Pelletier, Robert G. Hayes, Olivia Hoch, Brendan Fenerty, and Luke A. McGuire
EGUsphere, https://doi.org/10.5194/egusphere-2024-1153, https://doi.org/10.5194/egusphere-2024-1153, 2024
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On the gently sloping landscapes next to mountain fronts, junction angles tend to be lower (more acute), while in bedrock landscapes where the initial landscape or tectonic forcing is likely more spatially variable, junction angles tend to be larger (more obtuse). We demonstrate this using an analysis of ~20 million junction angles for the U.S.A., augmented by analyses of the Loess Plateau, China, and synthetic landscapes.
Julius Reich and Axel Winterscheid
EGUsphere, https://doi.org/10.5194/egusphere-2024-579, https://doi.org/10.5194/egusphere-2024-579, 2024
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Analysing the geometry and the dynamics of riverine bedforms (so-called dunetracking) is important for various fields of application and contributes to a sound and efficient river and sediment management. We developed a new tool, which enables a robust estimation of bedform characteristics and with which comprehensive sensitivity analyses can be carried out. Using a test dataset, we show that the selection of input parameters of dunetracking tools can have a significant impact on the results.
Prakash Pokhrel, Mikael Attal, Hugh D. Sinclair, Simon M. Mudd, and Mark Naylor
Earth Surf. Dynam., 12, 515–536, https://doi.org/10.5194/esurf-12-515-2024, https://doi.org/10.5194/esurf-12-515-2024, 2024
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Pebbles become increasingly rounded during downstream transport in rivers due to abrasion. This study quantifies pebble roundness along the length of two Himalayan rivers. We demonstrate that roundness increases with downstream distance and that the rates are dependent on rock type. We apply this to reconstructing travel distances and hence the size of ancient Himalaya. Results show that the ancient river network was larger than the modern one, indicating that there has been river capture.
Hayden L. Jacobson, Danica L. Roth, Gabriel Walton, Margaret Zimmer, and Kerri Johnson
EGUsphere, https://doi.org/10.5194/egusphere-2023-2694, https://doi.org/10.5194/egusphere-2023-2694, 2024
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Loose grains travel farther after a fire because no vegetation is left to stop them. This matters since loose grains at the base of a slope can turn into a debris flow if it rains. To find if grass growing back after a fire had different impacts on grains of different sizes on slopes of different steepness, we dropped thousands of natural grains and measured how far they went. Large grains went farther 7 months after the fire than 11 months after, and small grain movement didn’t change much.
Elizabeth Orr, Taylor Schildgen, Stefanie Tofelde, Hella Wittmann, and Ricardo Alonso
EGUsphere, https://doi.org/10.5194/egusphere-2024-784, https://doi.org/10.5194/egusphere-2024-784, 2024
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Fluvial terraces and alluvial fans in the Toro Basin, NW Argentina record river evolution and global climate cycles over time. Landform dating reveals lower-frequency climate cycles (100-kyr) preserved downstream and higher-frequency cycles (21/40-kyr) upstream, supporting theoretical predications that longer rivers filter out higher-frequency climate signals. This finding improves our understanding of the spatial distribution of sedimentary paleoclimate records within landscapes.
Orie Cecil, Nicholas Cohn, Matthew Farthing, Sourav Dutta, and Andrew Trautz
EGUsphere, https://doi.org/10.5194/egusphere-2024-855, https://doi.org/10.5194/egusphere-2024-855, 2024
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Using computational fluid dynamics, we analyze the error trends of an analytical shear stress distribution model used to drive aeolian transport for coastal dunes which are an important line of defense against storm related flooding hazards. We find that compared to numerical simulations, the analytical model results in a net overprediction of the landward migration rate. Additionally, two data-driven approaches are proposed for reducing the error while maintaining computational efficiency.
Jens Martin Turowski, Aaron Bufe, and Stefanie Tofelde
Earth Surf. Dynam., 12, 493–514, https://doi.org/10.5194/esurf-12-493-2024, https://doi.org/10.5194/esurf-12-493-2024, 2024
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Fluvial valleys are ubiquitous landforms, and understanding their formation and evolution affects a wide range of disciplines from archaeology and geology to fish biology. Here, we develop a model to predict the width of fluvial valleys for a wide range of geographic conditions. In the model, fluvial valley width is controlled by the two competing factors of lateral channel mobility and uplift. The model complies with available data and yields a broad range of quantitative predictions.
Daniel J. Ciarletta, Jennifer L. Miselis, Julie C. Bernier, and Arnell S. Forde
Earth Surf. Dynam., 12, 449–475, https://doi.org/10.5194/esurf-12-449-2024, https://doi.org/10.5194/esurf-12-449-2024, 2024
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We reconstructed the evolution of Fire Island, a barrier island in New York, USA, to identify drivers of landscape change. Results reveal Fire Island was once divided into multiple inlet-separated islands with distinct features. Later, inlets closed, and Fire Island’s landscape became more uniform as human activities intensified. The island is now less mobile and less likely to resist and recover from storm impacts and sea level rise. This vulnerability may exist for other stabilized barriers.
Chao Zhou, Xibin Tan, Yiduo Liu, and Feng Shi
Earth Surf. Dynam., 12, 433–448, https://doi.org/10.5194/esurf-12-433-2024, https://doi.org/10.5194/esurf-12-433-2024, 2024
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The drainage-divide stability provides new insights into both the river network evolution and the tectonic and/or climatic changes. Several methods have been proposed to determine the direction of drainage-divide migration. However, how to quantify the migration rate of drainage divides remains challenging. In this paper, we propose a new method to calculate the migration rate of drainage divides from high-resolution topographic data.
Moritz Altmann, Madlene Pfeiffer, Florian Haas, Jakob Rom, Fabian Fleischer, Tobias Heckmann, Livia Piermattei, Michael Wimmer, Lukas Braun, Manuel Stark, Sarah Betz-Nutz, and Michael Becht
Earth Surf. Dynam., 12, 399–431, https://doi.org/10.5194/esurf-12-399-2024, https://doi.org/10.5194/esurf-12-399-2024, 2024
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We show a long-term erosion monitoring of several sections on Little Ice Age lateral moraines with derived sediment yield from historical and current digital elevation modelling (DEM)-based differences. The first study period shows a clearly higher range of variability of sediment yield within the sites than the later periods. In most cases, a decreasing trend of geomorphic activity was observed.
Paul A. Carling
Earth Surf. Dynam., 12, 381–397, https://doi.org/10.5194/esurf-12-381-2024, https://doi.org/10.5194/esurf-12-381-2024, 2024
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Edge rounding in Shap granite glacial erratics is an irregular function of distance from the source outcrop in northern England, UK. Block shape is conservative, evolving according to block fracture mechanics – stochastic and silver ratio models – towards either of two attractor states. Progressive reduction in size occurs for blocks transported at the sole of the ice mass where the blocks are subject to compressive and tensile forces of the ice acting against a bedrock or till surface.
Stefan Hergarten
EGUsphere, https://doi.org/10.5194/egusphere-2024-336, https://doi.org/10.5194/egusphere-2024-336, 2024
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Faceted topographies are impressing footprints of active tectonics in geomorphology. This paper investigates the evolution of faceted topographies at normal faults and its interaction with the river network theoretically and numerically. As a main result beyond several relations for the the geometry of facets, the horizontal displacement associated to normal faults is crucial for the dissection of initially polygonal facets into triangular facets bounded by almost parallel rivers.
Gary Parker, Chenge An, Michael P. Lamb, Marcelo H. Garcia, Elizabeth H. Dingle, and Jeremy G. Venditti
Earth Surf. Dynam., 12, 367–380, https://doi.org/10.5194/esurf-12-367-2024, https://doi.org/10.5194/esurf-12-367-2024, 2024
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River morphology has traditionally been divided by the size 2 mm. We use dimensionless arguments to show that particles in the 1–5 mm range (i) are the finest range not easily suspended by alluvial flood flows, (ii) are transported preferentially over coarser gravel, and (iii), within limits, are also transported preferentially over sand. We show how fluid viscosity mediates the special status of sediment in this range.
Lindsay Marie Capito, Enrico Pandrin, Walter Bertoldi, Nicola Surian, and Simone Bizzi
Earth Surf. Dynam., 12, 321–345, https://doi.org/10.5194/esurf-12-321-2024, https://doi.org/10.5194/esurf-12-321-2024, 2024
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We propose that the pattern of erosion and deposition from repeat topographic surveys can be a proxy for path length in gravel-bed rivers. With laboratory and field data, we applied tools from signal processing to quantify this periodicity and used these path length estimates to calculate sediment transport using the morphological method. Our results highlight the potential to expand the use of the morphological method using only remotely sensed data as well as its limitations.
Caroline Fenske, Jean Braun, François Guillocheau, and Cécile Robin
EGUsphere, https://doi.org/10.5194/egusphere-2024-160, https://doi.org/10.5194/egusphere-2024-160, 2024
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We have developed a new numerical model to represent the formation of ferricretes which are iron-rich, hard layers found in soils and at the surface of the Earth. We assume that the formation mechanism implies variations in the height of the water table and that the hardening rate is proportional to precipitation. The model allows us to quantify the potential feedbacks they generate on the surface topography and the thickness of the regolith/soil layer.
Xuxu Wu, Jonathan Malarkey, Roberto Fernández, Jaco H. Baas, Ellen Pollard, and Daniel R. Parsons
Earth Surf. Dynam., 12, 231–247, https://doi.org/10.5194/esurf-12-231-2024, https://doi.org/10.5194/esurf-12-231-2024, 2024
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The seabed changes from flat to rippled in response to the frictional influence of waves and currents. This experimental study has shown that the speed of this change, the size of ripples that result and even whether ripples appear also depend on the amount of sticky mud present. This new classification on the basis of initial mud content should lead to improvements in models of seabed change in present environments by engineers and the interpretation of past environments by geologists.
Andrea D'Alpaos, Davide Tognin, Laura Tommasini, Luigi D'Alpaos, Andrea Rinaldo, and Luca Carniello
Earth Surf. Dynam., 12, 181–199, https://doi.org/10.5194/esurf-12-181-2024, https://doi.org/10.5194/esurf-12-181-2024, 2024
Short summary
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Sediment erosion induced by wind waves is one of the main drivers of the morphological evolution of shallow tidal environments. However, a reliable description of erosion events for the long-term morphodynamic modelling of tidal systems is still lacking. By statistically characterizing sediment erosion dynamics in the Venice Lagoon over the last 4 centuries, we set up a novel framework for a synthetic, yet reliable, description of erosion events in tidal systems.
Davide Tognin, Andrea D'Alpaos, Luigi D'Alpaos, Andrea Rinaldo, and Luca Carniello
Earth Surf. Dynam., 12, 201–218, https://doi.org/10.5194/esurf-12-201-2024, https://doi.org/10.5194/esurf-12-201-2024, 2024
Short summary
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Reliable quantification of sediment transport processes is necessary to understand the fate of shallow tidal environments. Here we present a framework for the description of suspended sediment dynamics to quantify deposition in the long-term modelling of shallow tidal systems. This characterization, together with that of erosion events, allows one to set up synthetic, yet reliable, models for the long-term evolution of tidal landscapes.
Emma L. S. Graf, Hugh D. Sinclair, Mikaël Attal, Boris Gailleton, Basanta Raj Adhikari, and Bishnu Raj Baral
Earth Surf. Dynam., 12, 135–161, https://doi.org/10.5194/esurf-12-135-2024, https://doi.org/10.5194/esurf-12-135-2024, 2024
Short summary
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Using satellite images, we show that, unlike other examples of earthquake-affected rivers, the rivers of central Nepal experienced little increase in sedimentation following the 2015 Gorkha earthquake. Instead, a catastrophic flood occurred in 2021 that buried towns and agricultural land under up to 10 m of sediment. We show that intense storms remobilised glacial sediment from high elevations causing much a greater impact than flushing of earthquake-induced landslides.
Mohamad Nasr, Adele Johannot, Thomas Geay, Sebastien Zanker, Jules Le Guern, and Alain Recking
Earth Surf. Dynam., 12, 117–134, https://doi.org/10.5194/esurf-12-117-2024, https://doi.org/10.5194/esurf-12-117-2024, 2024
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Hydrophones are used to monitor sediment transport in the river by listening to the acoustic noise generated by particle impacts on the riverbed. However, this acoustic noise is modified by the river flow and can cause misleading information about sediment transport. This article proposes a model that corrects the measured acoustic signal. Testing the model showed that the corrected signal is better correlated with bedload flux in the river.
Byungho Kang, Rusty A. Feagin, Thomas Huff, and Orencio Durán Vinent
Earth Surf. Dynam., 12, 105–115, https://doi.org/10.5194/esurf-12-105-2024, https://doi.org/10.5194/esurf-12-105-2024, 2024
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We provide a detailed characterization of the frequency, intensity and duration of flooding events at a site along the Texas coast. Our analysis demonstrates the suitability of relatively simple wave run-up models to estimate the frequency and intensity of coastal flooding. Our results validate and expand a probabilistic model of coastal flooding driven by wave run-up that can then be used in coastal risk management in response to sea level rise.
Shunsuke Oya, Fumitoshi Imaizumi, and Shoki Takayama
Earth Surf. Dynam., 12, 67–86, https://doi.org/10.5194/esurf-12-67-2024, https://doi.org/10.5194/esurf-12-67-2024, 2024
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The monitoring of pore water pressure in fully and partly saturated debris flows was performed at Ohya landslide scar, central Japan. The pore water pressure in some partly saturated flows greatly exceeded the hydrostatic pressure. The depth gradient of the pore water pressure in the lower part of the flow was generally higher than the upper part of the flow. We conclude that excess pore water pressure is present in many debris flow surges and is an important mechanism in debris flow behavior.
Gabriele Barile, Marco Redolfi, and Marco Tubino
Earth Surf. Dynam., 12, 87–103, https://doi.org/10.5194/esurf-12-87-2024, https://doi.org/10.5194/esurf-12-87-2024, 2024
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River bifurcations often show the closure of one branch (avulsion), whose causes are still poorly understood. Our model shows that when one branch stops transporting sediments, the other considerably erodes and captures much more flow, resulting in a self-sustaining process. This phenomenon intensifies when increasing the length of the branches, eventually leading to branch closure. This work may help to understand when avulsions occur and thus to design sustainable river restoration projects.
Rémi Bossis, Vincent Regard, Sébastien Carretier, and Sandrine Choy
EGUsphere, https://doi.org/10.5194/egusphere-2023-3020, https://doi.org/10.5194/egusphere-2023-3020, 2024
Short summary
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The erosion of rocky coasts occurs episodically through wave action and landslides, constituting a major natural hazard. Documenting the factors that control the coastal retreat rate over millennia is fundamental to evidencing any change in time. However, the known rates to date are essentially representative of the last few decades. Here, we present a new method using the concentration of an isotope, 10Be in sediment eroded from the cliff to quantify its retreat rate averaged over millennia.
Dieter Rickenmann
Earth Surf. Dynam., 12, 11–34, https://doi.org/10.5194/esurf-12-11-2024, https://doi.org/10.5194/esurf-12-11-2024, 2024
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Field measurements of the bedload flux with a high temporal resolution in a steep mountain stream were used to analyse the transport fluctuations as a function of the flow conditions. The disequilibrium ratio, a proxy for the solid particle concentration in the flow, was found to influence the sediment transport behaviour, and above-average disequilibrium conditions – associated with a larger sediment availability on the streambed – substantially affect subsequent transport conditions.
Byungho Kang, Rusty A. Feagin, Thomas Huff, and Orencio Durán Vinent
Earth Surf. Dynam., 12, 1–10, https://doi.org/10.5194/esurf-12-1-2024, https://doi.org/10.5194/esurf-12-1-2024, 2024
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Coastal flooding can cause significant damage to coastal ecosystems, infrastructure, and communities and is expected to increase in frequency with the acceleration of sea level rise. In order to respond to it, it is crucial to measure and model their frequency and intensity. Here, we show deep-learning techniques can be successfully used to automatically detect flooding events from complex coastal imagery, opening the way to real-time monitoring and data acquisition for model development.
Judith Y. Zomer, Bart Vermeulen, and Antonius J. F. Hoitink
Earth Surf. Dynam., 11, 1283–1298, https://doi.org/10.5194/esurf-11-1283-2023, https://doi.org/10.5194/esurf-11-1283-2023, 2023
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Secondary bedforms that are superimposed on large, primary dunes likely play a large role in fluvial systems. This study demonstrates that they can be omnipresent. Especially during peak flows, they grow large and can have steep slopes, likely affecting flood risk and sediment transport dynamics. Primary dune morphology determines whether they continuously or intermittently migrate. During discharge peaks, the secondary bedforms can become the dominant dune scale.
Cited articles
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.
Andersen, B. G.: Late Weichselian ice sheets in Eurasia, Greenland, and
Norway, in: The Last Great Ice Sheets, edited by: Denton, G. H. and Hughes,
T. J., John Wiley & Sons, New York, USA, 20–27, ISBN 978-0471060062, 1981.
Ballantyne, C. K.: Paraglacial geomorphology, Quaternaty Sci. Rev., 21,
1935–2017, 2002.
Barsch, D.: Permafrost creep and rockglaciers, Permafrost Periglac.
Process., 3, 175–188, https://doi.org/10.1002/ppp.3430030303, 1992.
Barsch, D.: Rockglaciers. Indicators for the Present and Former Geoecology
in high mountain environments, Spinger Verlag, Heidelberg, 1996.
Berthling, I.: Beyond confusion: Rock glaciers as cryo-conditioned
landforms, Geomorphology, 131, 98–106, https://doi.org/10.1016/j.geomorph.2011.05.002, 2011.
Berthling, I., Etzelmüller, B., Eiken, T., and Sollid, J. L.: Rock
glaciers on Prins Karls Forland, Svalbard. I: internal structure, flow
velocity and morphology, Permafrost Periglac. Process., 9, 135–145,
https://doi.org/10.1002/(SICI)1099-1530(199804/06)9:2<135::AID-PPP284>3.0.CO;2-R, 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.
Borge, A. F., Westermann, S., Solheim, I., and Etzelmüller, B.: Strong
degradation of palsas and peat plateaus in northern Norway during the last
60 years, The Cryosphere, 11, 1–16, https://doi.org/10.5194/tc-11-1-2017, 2017.
Boulton, G. S., Dongelmans, P., Punkari, M., and Broadgate, M.:
Palaeoglaciology of an ice sheet through a glacial cycle: the European ice
sheet through the Weichselian, Quaternary Sci. Rev., 20, 591–625,
https://doi.org/10.1016/S0277-3791(00)00160-8, 2001.
Dehls, J. F., Larsen, Y., Marinkovic, P., Lauknes, T. R., Stødle, D., and
Moldestad, D. A.: INSAR.No: A National Insar Deformation Mapping/Monitoring
Service In Norway – From Concept To Operations, in: IGARSS 2019 – 2019 IEEE
International Geoscience and Remote Sensing Symposium, 28 July–2 August 2019, Yokohama, Japan, 5461–5464, https://doi.org/10.1109/IGARSS.2019.8898614, 2019.
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), Norsk Geografisk Tidsskrift –
Norweg. J. Geogr., 59, 194–203, https://doi.org/10.1080/00291950510020673, 2005.
Deluigi, N., Lambiel, C., and Kanevski, M.: Data-driven mapping of the
potential mountain permafrost distribution, Sci. Total Environ., 590–591, 370–380, https://doi.org/10.1016/j.scitotenv.2017.02.041, 2017.
Dowdeswell, J. A. and Siegert, M. J.: Ice-sheet numerical modeling and
marine geophysical measurements of glacier-derived sedimentation on the
Eurasian Arctic continental margins, GSA Bull., 111, 1080–1097,
https://doi.org/10.1130/0016-7606(1999)111<1080:Isnmam>2.3.Co;2, 1999.
Egholm, D. L., Knudsen, M. F., and Sandiford, M.: Lifespan of mountain
ranges scaled by feedbacks between landsliding and erosion by rivers,
Nature, 498, 475–478, https://doi.org/10.1038/nature12218, 2013.
Etzelmüller, B., Patton, H., Schomacker, A., Czekirda, J., Girod, L.,
Hubbard, A., Lilleøren, K. S., and Westermann, S.: Icelandic permafrost
dynamics since the Last Glacial Maximum – model results and
geomorphological implications, Quaternary Sci. Rev., 233, 106236,
https://doi.org/10.1016/j.quascirev.2020.106236, 2020.
Farbrot, H., Isaksen, K., Eiken, T., Kääb, A., and Sollid, J. L.:
Composition and internal structures of a rock glacier on the strandflat of
western Spitsbergen, Svalbard, Norsk Geografisk Tidsskrift, 59, 139–148,
2005.
Farbrot, H., Etzelmüller, B., Gudmundsson, A., Humlum, O.,
Kellerer-Pirklbauer, A., Eiken, T., and Wangensteen, B.: Rock glaciers and
permafrost in Trollaskagi, northern Iceland, Z. Geomorphol., 51, 1–16, https://doi.org/10.1127/0372-8854/007/0051s2-0001, 2007.
Farbrot, H., Isaksen, K., and Etzelmüller, B.: Present and past
distribution of mountain permafrost in Gaissane Mountains, Northern Norway,
Ninth International Conference on Permafrost, University of Alaska,
Fairbanks, 427–432, ISBN 978-0-9800179-2-2, 2008.
Farbrot, H., Isaksen, K., Etzelmüller, B., and Gisnås, K.: Ground
Thermal Regime and Permafrost Distribution under a Changing Climate in
Northern Norway, Permafrost Periglac. Process., 24, 20–38, https://doi.org/10.1002/ppp.1763, 2013.
Ferretti, A., Prati, C., and Rocca, F.: Permanent scatterers in SAR interferometry, IEEE T. Geosci. Remote, 39, 8–20, https://doi.org/10.1109/36.898661, 2001.
Fjellanger, J., Sørbel, L., Linge, H., Brook, E. J., Raisbeck, G. M., and
Yiou, F.: Glacial survival of blockfields on the Varanger Peninsula,
northern Norway, Geomorphology, 82, 255–272, https://doi.org/10.1016/j.geomorph.2006.05.007, 2006.
Førland, E. J., Benestad, R., Hanssen-Bauer, I., Haugen, J. E., and Torill Skaugen, E.: Temperature and Precipitation Development at Svalbard 1900–2100, Adv. Meteorol., 2011, 893790, https://doi.org/10.1155/2011/893790, 2011.
Gisnås, K., Etzelmüller, B., Farbrot, H., Schuler, T. V., and
Westermann, S.: CryoGRID 1.0: Permafrost Distribution in Norway estimated by
a Spatial Numerical Model, Permafrost Periglac. Process., 24, 2–19,
https://doi.org/10.1002/ppp.1765, 2013.
Gisnås, K., Westermann, S., Schuler, T. V., Melvold, K., and
Etzelmüller, B.: Small-scale variation of snow in a regional permafrost
model, The Cryosphere, 10, 1201–1215, https://doi.org/10.5194/tc-10-1201-2016, 2016.
Gisnås, K., Etzelmüller, B., Lussana, C., Hjort, J., Sannel, A. B.
K., Isaksen, K., Westermann, S., Kuhry, P., Christiansen, H. H., Frampton,
A., and Åkerman, J.: Permafrost Map for Norway, Sweden and Finland,
Permafrost Periglac. Process., 28, 359–378, https://doi.org/10.1002/ppp.1922, 2017.
Gruber, S.: Derivation and analysis of a high-resolution estimate of global permafrost zonation, The Cryosphere, 6, 221–233, https://doi.org/10.5194/tc-6-221-2012, 2012.
Gubler, S., Fiddes, J., Keller, M., and Gruber, S.: Scale-dependent measurement and analysis of ground surface temperature variability in alpine
terrain, The Cryosphere, 5, 431–443, https://doi.org/10.5194/tc-5-431-2011, 2011.
Haeberli, W.: Creep of mountain permafrost: internal structure and flow of
Alpine rock glaciers, ETH, Zurich, Mitteilungen der Versuchsanstalt für Wasserbau, Hydrologie und Glaziologie an der Eidgenössischen Technischen Hochschule Zürich, 142 pp., ISSN 0374-0056, 1985.
Haeberli, W., Hallet, B., Arenson, L., Elconin, R., Humlum, O., Kaab, A.,
Kaufmann, V., Ladanyi, B., Matsuoka, N., Springman, S., and Vonder Muhll,
D.: Permafrost creep and rock glacier dynamics, Permafrost Periglac. Process., 17, 189–214, https://doi.org/10.1002/ppp.561, 2006.
Hales, T. C. and Roering, J. J.: Climatic controls on frost cracking and
implications for the evolution of bedrock landscapes, J. Geophys.
Res.-Earth, 112, F02033, https://doi.org/10.1029/2006jf000616, 2007.
Hales, T. C. and Roering, J. J.: A frost “buzzsaw” mechanism for erosion
of the eastern Southern Alps, New Zealand, Geomorphology, 107, 241–253,
https://doi.org/10.1016/j.geomorph.2008.12.012, 2009.
Halla, C., Blöthe, J. H., Tapia Baldis, C., Trombotto Liaudat, D., Hilbich, C., Hauck, C., and Schrott, L.: Ice content and interannual water storage changes of an active rock glacier in the dry Andes of Argentina, The Cryosphere, 15, 1187–1213, https://doi.org/10.5194/tc-15-1187-2021, 2021.
Hanssen-Bauer, I., Førland, E. J., Haddeland, I., Hisdal, H., Lawrence, D., Mayer, S., Nesje, A., Nilsen, J. E. Ø., Sandven, S., Sandø, A. B., Sorteberg, A., Ådlandsvik, B., Andreassen, L. M., Beldring, S., Bjune, A., Breil, K., Dahl, C. A., Dyrrdal, A. V., Isaksen, K., Haakenstad, H., Hygen, H. O., Langehaug, H. R., Lauritzen, S. E., Melvold, K., Mezghani, A., Ravndal, O. R., Risebrobakken, B., Roald, L., Sande, H., Simpson, M. J. R., Skagseth, Ø., Skaugen, T., Skogen, M., Støren, E. N., Tveito, O. E., and Wong, W. K.: Climate in Norway 2100 – a knowledge base for climate adaptation, Norwegian Environment Agency (Miljødirektoratet), 1/2017, 48 pp,, ISSN 2387-3027, https://www.miljodirektoratet.no/globalassets/publikasjoner/m741/m741.pdf (last access: 7 October 2022), 2017.
Hanssen-Bauer, I., Førland, E. J., Hisdal, H., Mayer, S., Sandø, A.
B., Sorteberg, A., Adakudlu, M., Andresen, J., Bakke, J., Beldring, S.,
Benestad, R., Bilt, W., Bogen, J., Borstad, C., Breili, K., Breivik, Ø.,
Børsheim, K. Y., Christiansen, H. H., Dobler, A., Engeset, R.,
Frauenfelder, R., Gerland, S., Gjelten, H. M., Gundersen, J., Isaksen, K.,
Jaedicke, C., Kierulf, H. P., Kohler, J., Li, H., Lutz, J., Melvold, K.,
Mezghani, A., Nilsen, F., Nilsen, I. B., Nilsen, J. E. Ø., Pavlova, O.,
Ravndal, O., Risebrobakken, B., Saloranta, T., Sandven, S., Schuler, T. V.,
Simpson, M. J. R., Skogen, M., Smedsrud, L. H., Sund, M., Vikhamar-Schuler,
D., Westermann, S., and Wong, W. K.: Climate in Svalbard 2100 – a knowledge
base for climate adaptation, The Norwegian Environment Agency, 207 pp. , ISSN 2387-3027, https://www.miljodirektoratet.no/globalassets/publikasjoner/M1242/M1242.pdf (last accessL 7 October 2022), 2019.
Harris, C. and Vonder Mühll, D.: Permafrost and climate in Europe.
Climate change, mountain permafrost degradation and geotechnical hazard, in:
Global Change and Protected Areas, Advances in Global Change Research, edited by: Visconti, G., Beniston, M., Iannorelli, E. D., and Barba, D., 71–82, ISBN 978-1-4020-3507-4, 2001.
Harris, S. A. and Corte, A. E.: Interactions and relations between mountain
permafrost, glaciers, snow and water, Permafrost Periglac. Process., 3, 103–110, https://doi.org/10.1002/ppp.3430030207, 1992.
Hauck, C. and Kneisel, C. (Eds.): Applied geophysics in periglacial
environments, Campbridge University Press, ISBN 9780511535628, https://doi.org/10.1017/CBO9780511535628, 2008.
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.
Heid, T. and Kääb, A.: Evaluation of existing image matching methods
for deriving glacier surface displacements globally from optical satellite
imagery, Remote Sens. Environ., 118, 339–355, https://doi.org/10.1016/j.rse.2011.11.024, 2012.
Hilbich, C.: Time-lapse refraction seismic tomography for the detection of ground ice degradation, The Cryosphere, 4, 243–259, https://doi.org/10.5194/tc-4-243-2010, 2010.
Humlum, O., Christiansen, H. H., and Juliussen, H.: Avalanche-derived rock
glaciers in Svalbard, Permafrost Periglac. Process., 18, 75–88,
https://doi.org/10.1002/ppp.580, 2007.
Ikeda, A. and Matsuoka, N.: Pebbly versus bouldery rock glaciers: Morphology, structure and processes, Geomorphology, 73, 279–296, https://doi.org/10.1016/j.geomorph.2005.07.015, 2006.
IPA: Kinematics as an optional attribute in standardized rock glacier inventories, Version 3.0.1, IPA Action Group Rock glacier inventories and kinematics, https://bigweb.unifr.ch/Science/Geosciences/Geomorphology/Pub/Website/IPA/CurrentVersion/Current_KinematicalAttribute.pdf, last access: 7 October 2022.
Isaksen, K., Ødegård, R. S., Eiken, T., and Sollid, J. L.:
Composition, flow and development of two tongue-shaped rock glaciers in the
permafrost of Svalbard, Permafrost Periglac. Process., 11, 241–257, 2000.
Kääb, A. and Vollmer, M.: Surface Geometry, Thickness Changes and
Flow Fields on Creeping Mountain Permafrost: Automatic Extraction by Digital
Image Analysis, Permafrost Periglac. Process., 11, 315–326,
https://doi.org/10.1002/1099-1530(200012)11:4<315::AID-PPP365>3.0.CO;2-J, 2000.
Kääb, A., Frauenfelder, R., and Roer, I.: On the response of
rockglacier creep to surface temperature increase, Global Planet. Change, 56, 172–187, https://doi.org/10.1016/j.gloplacha.2006.07.005, 2007.
Kellerer-Pirklbauer, A., Wangensteen, B., Farbrot, H., and Etzelmüller,
B.: Relative surface age-dating of rock glacier systems near Holar in
Hjaltadalur, northern Iceland, J. Quatern. Sci., 23, 137–151, 2008.
Kellerer-Pirklbauser, A., Lieb, G., and Kleinferchner, H.: A new rock glacier
inventory of the eastern European Alps, Aust. J. Earth Sci., 105, 78–93, 2012.
Kenner, R., Phillips, M., Hauck, C., Hilbich, C., Mulsow, C., Bühler,
Y., Stoffel, A., and Buchroithner, M.: New insights on permafrost genesis
and conservation in talus slopes based on observations at Flüelapass,
Eastern Switzerland, Geomorphology, 290, 101–113,
https://doi.org/10.1016/j.geomorph.2017.04.011, 2017.
King, L.: Zonation and Ecology of High Mountain Permafrost in Scandinavia,
Geogr. Ann. A, 68, 131–139, 1986.
Kjellman, S. E., Axelsson, P. E., Etzelmüller, B., Westermann, S., and
Sannel, A. B. K.: Holocene development of subarctic permafrost peatlands in
Finnmark, northern Norway, Holocene, 28, 1855–1869,
https://doi.org/10.1177/0959683618798126, 2018.
Lambiel, C. and Pieracci, K.: Permafrost distribution in talus slopes
located within the alpine periglacial belt, Swiss Alps, Permafrost
Periglac. Process., 19, 293–304, https://doi.org/10.1002/ppp.624, 2008.
Liestøl, O.: Talus terraces in Arctic regions, Norsk polarinstitutts,
Norwegian Polar Institute, Aarbok, https://brage.npolar.no/npolar-xmlui/handle/11250/172825102--105 (last access: 7 October 2022), 1961.
Lilleøren, K. S.: Transitional rock glaciers at sea-level in Northern Norway – data, Zenodo [data set], https://doi.org/10.5281/zenodo.7157112, 2022.
Lilleøren, K. S. and Etzelmüller, B.: A regional inventory of rock
glaciers and ice-cored moraines in Norway, Geograf. Ann. A, 93, 175–191, https://doi.org/10.1111/j.1468-0459.2011.00430.x, 2011.
Lilleøren, K. S., Etzelmüller, B., Gärtner-Roer, I.,
Kääb, A., Westermann, S., and Guðmundsson, Á.: The
Distribution, Thermal Characteristics and Dynamics of Permafrost in
Tröllaskagi, Northern Iceland, as Inferred from the Distribution of Rock
Glaciers and Ice-Cored Moraines, Permafrost Periglac. Process., 24, 322–335, https://doi.org/10.1002/ppp.1792, 2013.
Loke, M. H.: Tutorial: 2-D and 3-D electrical imaging surveys, http://www.geotomosoft.com/downloads.php (last access: 7 October 2022), 2018.
Loke, M. H. and Barker, R. D.: Rapid least-squares inversion of apparent
resistivity pseudosections by a quasi-Newton method, Geophys. Prospect., 44, 131–152, https://doi.org/10.1111/j.1365-2478.1996.tb00142.x, 1996a.
Loke, M. H. and Barker, R. D.: Practical techniques for 3D resistivity
surveys and data inversion, Geophys. Prospect., 44, 499–523,
https://doi.org/10.1111/j.1365-2478.1996.tb00162.x, 1996b.
Lussana, C., Saloranta, T., Skaugen, T., Magnusson, J., Tveito, O. E., and
Andersen, J.: seNorge2 daily precipitation, an observational gridded dataset
over Norway from 1957 to the present day, Earth Syst. Sci. Data, 10, 235–249, https://doi.org/10.5194/essd-10-235-2018, 2018.
Malmström, B. and Palmér, O.: Glacial and periglacial geomorphology
on the Varanger peninsula, Northern Norway. Geomorphological mapping with
analysis of glacial forms and block fields, The Royal University of Lund,
Sweden, https://bigweb.unifr.ch/Science/Geosciences/Geomorphology/Pub/Website/IPA/Guidelines/V4/210801_Baseline_Concepts_Inventorying_Rock_Glaciers_V4.2.1.pdf (last access: 7 October 2022), 1984.
Matsuoka, N. and Ikeda, A.: Geological control on the distribution and
characteristics talus-derived rock glaciers, Annual Report of the Institute
of Geosciences, University of Tsukuba, Japan, 27, 11–16, https://www.researchgate.net/publication/37640619_Geological_control_on_the_distribution_and_characteristics_of_talus-derived_rock_glaciers (last access: 14 October 2022), 2001.
McColl, S. T.: Paraglacial rock-slope stability, Geomorphology, 153–154,
1–16, https://doi.org/10.1016/j.geomorph.2012.02.015, 2012.
Meier, K.-D.: Studien zur Periglaziärmorphologie der Varanger-Halbinsel, Nordnorwegen, in: Schriftenreihe des Arbeitskreises für geographische Nordeuropaforschung in der Deutschen Gesellschaft für Geographie, edited by: Glässer, H., Lindemann, R., and Venzke, J.-F., NORDEN, Bremen, Germany, 405 pp., 1996.
Mewes, B., Hilbich, C., Delaloye, R., and Hauck, C.: Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes, The Cryosphere, 11, 2957–2974, https://doi.org/10.5194/tc-11-2957-2017, 2017.
NCCS: Klimanormaler – ny standard normalperiode 1991–2020 (Climate normals
– new standard normal period 1991-2020), Norwegian Center for Climate
Services, https://klimaservicesenter.no/kss/vrdata/normaler#nye-normaler-for-stasjoner
(last access: 15 January 2022), 2021.
NGU: 1:50 000 Bedrock data, NGU – Norwegian Geological Survey,
https://geo.ngu.no/kart/berggrunn_mobil/, last access: 10 January 2022.
Nordli, Ø., Przybylak, R., Ogilvie, A. E. J., and Isaksen, K.: Long-term
temperature trends and variability on Spitsbergen: the extended Svalbard
Airport temperature series, 1898–2012, Polar Res., 33, 21349,
https://doi.org/10.3402/polar.v33.21349, 2014.
Obu, J., Westermann, S., Kääb, A., and Bartsch, A.: Ground
Temperature Map, 2000–2016, Northern Hemisphere Permafrost, PANGAEA
[data set], https://doi.org/10.1594/PANGAEA.888600, 2018.
Ottesen, D., Dowdeswell, J. A., and Rise, L.: Submarine landforms and the
reconstruction of fast-flowing ice streams within a large Quaternary ice
sheet: The 2500-km-long Norwegian-Svalbard margin (57∘–80∘ N), GSA Bull., 117, 1033–1050, https://doi.org/10.1130/b25577.1, 2005.
Pellet, C., Hilbich, C., Marmy, A., and Hauck, C.: Soil Moisture Data for the Validation of Permafrost Models Using Direct and Indirect Measurement Approaches at Three Alpine Sites, Front. Earth Sci., 3, 91, https://doi.org/10.3389/feart.2015.00091, 2016.
RGIK: Towards standard guidelines for inventorying rock glaciers: baseline
concepts (version 4.2.2), IPA Action Group on Rock Glacier Inventories and
Kinematics, https://bigweb.unifr.ch/Science/Geosciences/Geomorphology/Pub/Website/IPA/Guidelines/V4/210801_Baseline_Concepts_Inventorying_Rock_Glaciers_V4.2.1.pdf (last access: 7 October 2022), 2021.
Rödder, T. and Kneisel, C.: Influence of snow cover and grain size on
the ground thermal regime in the discontinuous permafrost zone, Swiss Alps,
Geomorphology, 175–176, 176–189, https://doi.org/10.1016/j.geomorph.2012.07.008, 2012.
Romundset, A., Bondevik, S., and Bennike, O.: Postglacial uplift and
relative sea level changes in Finnmark, northern Norway, Quaternary Sci. Rev., 30, 2398–2421, https://doi.org/10.1016/j.quascirev.2011.06.007, 2011.
Rouyet, L., Lauknes, T. R., Barboux, C., Bertone, A., Delaloye, R., Kaab, A., Christiansen, H. H., Onaca, A., Sirbu, F., Poncos, V., Strozzi, T., and Bartsch, A.: Rock glacier kinematics as new associated parameter of ECV permafrost, version 1.0. European Space Agency, CCI+ Phase 1 – New ECVs Permafrost, https://climate.esa.int/media/documents/CCI_PERMA_CCN1_2_D2.5_PVP_v1.0.pdf (last access: 7 October 2022), 2020.
Rouyet, L., Lilleøren, K. S., Böhme, 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.
Saloranta, T. M.: Simulating snow maps for Norway: description and statistical evaluation of the seNorge snow model, The Cryosphere, 6, 1323–1337, https://doi.org/10.5194/tc-6-1323-2012, 2012.
Sandwell, D. T. and Price, E. J.: Phase gradient approach to stacking
interferograms, J. Geophys. Res.-Solid, 103, 30183–30204, https://doi.org/10.1029/1998JB900008, 1998.
Schilling, J., Reimann, C., and Roberts, D.: REE potential of the Nordkinn
Peninsula, North Norway: A comparison of soil and bedrock composition, Appl. Geochem., 41, 95–106, https://doi.org/10.1016/j.apgeochem.2013.12.004, 2014.
Serrano, E., San José, J. J., and Agudo, C.: Rock glacier dynamics in a
marginal periglacial high mountain environment: Flow, movement (1991–2000)
and structure of the Argualas rock glacier, the Pyrenees, Geomorphology, 74,
285–296, https://doi.org/10.1016/j.geomorph.2005.08.014, 2006.
Shackleton, C., Patton, H., Hubbard, A., Winsborrow, M., Kingslake, J.,
Esteves, M., Andreassen, K., and Greenwood, S. L.: Subglacial water storage
and drainage beneath the Fennoscandian and Barents Sea ice sheets, Quaternary
Sci. Rev., 201, 13–28, https://doi.org/10.1016/j.quascirev.2018.10.007, 2018.
Sollid, J. L. and Sørbel, L.: Rock glaciers in Svalbard and Norway,
Permafrost Periglac. Process., 3, 215–220, 1992.
Sollid, J. L. and Sørbel, L.: Palsa Bogs as a climate indicator – Examples from Dovrefjell, Southern Norway, Ambio, 27, 287–291, 1998.
Sollid, J. L., Andersen, S. T., Hamre, N., Kjeldsen, O., Salvigsen, O.,
Sturød, S., Tveitå, T., and Wilhelmsen, A.: Deglaciation of Finnmark,
North Norway, Norsk geografisk tidsskrift – Norweg. J. Geogr., 27, 233–325, 1973.
Sundheim, E. and Andresen, H.: Pilot project in Moldova for use of drone for production of orthophoto data, Geomatikk Survey AS, https://docplayer.net/50436268-Report-statens-kartverk-agency-for-land-relations (last access: 14 October 2022), 2018.
Svensson, H.: Note on a type of patterned ground on the Varanger peninsula,
Norway, Geograf. Ann., 44, 413, https://doi.org/10.1080/20014422.1962.11881011, 1962.
Svensson, H.: Permafrost. Some Morphoclimatic Aspects of Periglacial
Features of Northern Scandinavia, Geograf. Ann. A, 68, 123–130, https://doi.org/10.1080/04353676.1986.11880165, 1986.
Svensson, H.: Frost-fissure patterns in the Nordic countries, Geograf. Ann. A, 74, 207–218, 1992.
van Everdingen, R. O. E.: Multi-language glossary of permafrost and related
ground-ice terms, International Permafrost Association, the University of
Calgary, Calgary, https://globalcryospherewatch.org/reference/glossary_docs/Glossary_of_Permafrost_and_Ground-Ice_IPA_2005.pdf (last access: 7 October 2022), 1998.
Vick, L. M., Böhme, M., Rouyet, L., Bergh, S. G., Corner, G. D., and
Lauknes, T. R.: Structurally controlled rock slope deformation in northern
Norway, Landslides, 17, 1745–1776, https://doi.org/10.1007/s10346-020-01421-7, 2020.
Westermann, S., Schuler, T. V., Gisnås, K., and Etzelmüller, B.:
Transient thermal modeling of permafrost conditions in Southern Norway, The
Cryosphere, 7, 719–739, https://doi.org/10.5194/tc-7-719-2013, 2013.
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.
Winsborrow, M. C. M., Andreassen, K., Corner, G. D., and Laberg, J. S.:
Deglaciation of a marine-based ice sheet: Late Weichselian palaeo-ice dynamics and retreat in the southern Barents Sea reconstructed from onshore
and offshore glacial geomorphology, Quaternary Sci. Rev., 29, 424–442,
https://doi.org/10.1016/j.quascirev.2009.10.001, 2010.
Yuki, S., Ishikawa, M., and Ono, Y.: Thermal regime of sporadic permafrost
in a block slope on Mt. Nishi-Nupukaushinupuri, Hokkaido Island, Northern
Japan, Geomorphology, 52, 121–130, https://doi.org/10.1016/S0169-555X(02)00252-0, 2003.
Short summary
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.
In northern Norway we have observed several rock glaciers at sea level. Rock glaciers are...
