Articles | Volume 9, issue 5
https://doi.org/10.5194/esurf-9-1363-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-9-1363-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Oct 2021
Research article |
| 14 Oct 2021
| 14 Oct 2021
Relationship between meteoric 10Be and NO3− concentrations in soils along Shackleton Glacier, Antarctica
School of Earth Sciences, The Ohio State University, Columbus, OH 43210, USA
Byrd Polar and Climate Research Center, The Ohio State University,
Columbus, OH 43210, USA
now at: Departments of Geology and Geophysics, and Applied Ocean
Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Lee B. Corbett
Rubenstein School of the Environment and Natural Resources, University of Vermont, Burlington, VT 05405, USA
Paul R. Bierman
Rubenstein School of the Environment and Natural Resources, University of Vermont, Burlington, VT 05405, USA
Byron J. Adams
Department of Biology, Evolutionary Ecology Laboratories, and Monte L. Bean Museum, Brigham Young University, Provo, UT 84602, USA
Diana H. Wall
Department of Biology and School of Global Environmental Sustainability, Colorado State University, Fort Collins, CO 80523, USA
Ian D. Hogg
Canadian High Arctic Research Station, Polar Knowledge Canada,
Cambridge Bay, NU, X0B0C0, Canada
School of Science, University of Waikato, Hamilton, 3216, New Zealand
Noah Fierer
Department of Ecology and Evolutionary Biology and Cooperative
Institute for Research in Environmental Science, University of Colorado
Boulder, Boulder, CO 80309, USA
W. Berry Lyons
School of Earth Sciences, The Ohio State University, Columbus, OH 43210, USA
Byrd Polar and Climate Research Center, The Ohio State University,
Columbus, OH 43210, USA
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Melisa A. Diaz, Christopher B. Gardner, Susan A. Welch, W. Andrew Jackson, Byron J. Adams, Diana H. Wall, Ian D. Hogg, Noah Fierer, and W. Berry Lyons
Biogeosciences, 18, 1629–1644, https://doi.org/10.5194/bg-18-1629-2021, https://doi.org/10.5194/bg-18-1629-2021, 2021
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Water-soluble salt and nutrient concentrations of soils collected along the Shackleton Glacier, Antarctica, show distinct geochemical gradients related to latitude, longitude, elevation, soil moisture, and distance from coast and glacier. Machine learning algorithms were used to estimate geochemical gradients for the region given the relationship with geography. Geography and surface exposure age drive salt and nutrient abundances, influencing invertebrate habitat suitability and biogeography.
Marie Bergelin, Greg Balco, Lee B. Corbett, and Paul R. Bierman
EGUsphere, https://doi.org/10.5194/egusphere-2024-702, https://doi.org/10.5194/egusphere-2024-702, 2024
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Cosmogenic nuclides, such as 10Be, are rare isotopes produced in rocks when exposed at Earth’s surface and are valuable for understanding surface processes and landscape evolution. However, 10Be is usually measured in quartz minerals. Here we present advances in efficiently extracting and measuring 10Be in the pyroxene mineral. These measurements expand the use of 10Be as a dating tool for new rock types and provide opportunities to understand landscape processes in areas that lack quartz.
Paul R. Bierman, Andrew J. Christ, Catherine M. Collins, Halley M. Mastro, Juliana Souza, Pierre-Henri Blard, Stefanie Brachfeld, Zoe R. Courville, Tammy M. Rittenour, Elizabeth K. Thomas, Jean-Louis Tison, and Francois Fripiat
EGUsphere, https://doi.org/10.5194/egusphere-2023-2922, https://doi.org/10.5194/egusphere-2023-2922, 2024
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In 1966, the US Army drilled through the Greenland Ice Sheet at Camp Century, Greenland; they recovered 3.44 meters of frozen sediment. Here, we decipher the material’s history. Water, flowing during a warm interglacial when the ice sheet melted from northwest Greenland, deposited the upper material which contains fossil plant and insect parts. The lower material, separated by more than a meter of ice with some sediment, is till, deposited by the ice sheet during a prior cold period.
Eric W. Portenga, David J. Ullman, Lee B. Corbett, Paul R. Bierman, and Marc W. Caffee
Geochronology, 5, 413–431, https://doi.org/10.5194/gchron-5-413-2023, https://doi.org/10.5194/gchron-5-413-2023, 2023
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New exposure ages of glacial erratics on moraines on Isle Royale – the largest island in North America's Lake Superior – show that the Laurentide Ice Sheet did not retreat from the island nor the south shores of Lake Superior until the early Holocene, which is later than previously thought. These new ages unify regional ice retreat histories from the mainland, the Lake Superior lake-bottom stratigraphy, underwater moraines, and meltwater drainage pathways through the Laurentian Great Lakes.
Adrian M. Bender, Richard O. Lease, Lee B. Corbett, Paul R. Bierman, Marc W. Caffee, James V. Jones, and Doug Kreiner
Earth Surf. Dynam., 10, 1041–1053, https://doi.org/10.5194/esurf-10-1041-2022, https://doi.org/10.5194/esurf-10-1041-2022, 2022
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To understand landscape evolution in the mineral resource-rich Yukon River basin (Alaska and Canada), we mapped and cosmogenic isotope-dated river terraces along the Charley River. Results imply widespread Yukon River incision that drove increased Bering Sea sedimentation and carbon sequestration during global climate changes 2.6 and 1 million years ago. Such erosion may have fed back to late Cenozoic climate change by reducing atmospheric carbon as observed in many records worldwide.
Marie Bergelin, Jaakko Putkonen, Greg Balco, Daniel Morgan, Lee B. Corbett, and Paul R. Bierman
The Cryosphere, 16, 2793–2817, https://doi.org/10.5194/tc-16-2793-2022, https://doi.org/10.5194/tc-16-2793-2022, 2022
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Glacier ice contains information on past climate and can help us understand how the world changes through time. We have found and sampled a buried ice mass in Antarctica that is much older than most ice on Earth and difficult to date. Therefore, we developed a new dating application which showed the ice to be 3 million years old. Our new dating solution will potentially help to date other ancient ice masses since such old glacial ice could yield data on past environmental conditions on Earth.
Mae Kate Campbell, Paul R. Bierman, Amanda H. Schmidt, Rita Sibello Hernández, Alejandro García-Moya, Lee B. Corbett, Alan J. Hidy, Héctor Cartas Águila, Aniel Guillén Arruebarrena, Greg Balco, David Dethier, and Marc Caffee
Geochronology, 4, 435–453, https://doi.org/10.5194/gchron-4-435-2022, https://doi.org/10.5194/gchron-4-435-2022, 2022
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We used cosmogenic radionuclides in detrital river sediment to measure erosion rates of watersheds in central Cuba; erosion rates are lower than rock dissolution rates in lowland watersheds. Data from two different cosmogenic nuclides suggest that some basins may have a mixed layer deeper than is typically modeled and could have experienced significant burial after or during exposure. We conclude that significant mass loss may occur at depth through chemical weathering processes.
Leah A. VanLandingham, Eric W. Portenga, Edward C. Lefroy, Amanda H. Schmidt, Paul R. Bierman, and Alan J. Hidy
Geochronology, 4, 153–176, https://doi.org/10.5194/gchron-4-153-2022, https://doi.org/10.5194/gchron-4-153-2022, 2022
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This study presents erosion rates of the George River and seven of its tributaries in northeast Tasmania, Australia. These erosion rates are the first measures of landscape change over millennial timescales for Tasmania. We demonstrate that erosion is closely linked to a topographic rainfall gradient across George River. Our findings may be useful for efforts to restore ecological health to Georges Bay by determining a pre-disturbance level of erosion and sediment delivery to this estuary.
Andrew J. Christ, Paul R. Bierman, Jennifer L. Lamp, Joerg M. Schaefer, and Gisela Winckler
Geochronology, 3, 505–523, https://doi.org/10.5194/gchron-3-505-2021, https://doi.org/10.5194/gchron-3-505-2021, 2021
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Cosmogenic nuclide surface exposure dating is commonly used to constrain the timing of past glacier extents. However, Antarctic exposure age datasets are often scattered and difficult to interpret. We compile new and existing exposure ages of a glacial deposit with independently known age constraints and identify surface processes that increase or reduce the likelihood of exposure age scatter. Then we present new data for a previously unmapped and undated older deposit from the same region.
Melisa A. Diaz, Christopher B. Gardner, Susan A. Welch, W. Andrew Jackson, Byron J. Adams, Diana H. Wall, Ian D. Hogg, Noah Fierer, and W. Berry Lyons
Biogeosciences, 18, 1629–1644, https://doi.org/10.5194/bg-18-1629-2021, https://doi.org/10.5194/bg-18-1629-2021, 2021
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Water-soluble salt and nutrient concentrations of soils collected along the Shackleton Glacier, Antarctica, show distinct geochemical gradients related to latitude, longitude, elevation, soil moisture, and distance from coast and glacier. Machine learning algorithms were used to estimate geochemical gradients for the region given the relationship with geography. Geography and surface exposure age drive salt and nutrient abundances, influencing invertebrate habitat suitability and biogeography.
Hannah S. Weiss, Paul R. Bierman, Yves Dubief, and Scott D. Hamshaw
The Cryosphere, 13, 3367–3382, https://doi.org/10.5194/tc-13-3367-2019, https://doi.org/10.5194/tc-13-3367-2019, 2019
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Climate change is devastating winter tourism. High-elevation, high-latitude ski centers have turned to saving snow over the summer. We present results of two field seasons to test and optimize over-summer snow storage at a midlatitude, low-elevation nordic ski center in the northeastern USA. In 2018, we tested coverings and found success overlaying 20 cm of wet woodchips with a reflective sheet. In 2019, we employed this strategy to a large pile and stored sufficient snow to open the ski season.
Roland Baatz, Pamela L. Sullivan, Li Li, Samantha R. Weintraub, Henry W. Loescher, Michael Mirtl, Peter M. Groffman, Diana H. Wall, Michael Young, Tim White, Hang Wen, Steffen Zacharias, Ingolf Kühn, Jianwu Tang, Jérôme Gaillardet, Isabelle Braud, Alejandro N. Flores, Praveen Kumar, Henry Lin, Teamrat Ghezzehei, Julia Jones, Henry L. Gholz, Harry Vereecken, and Kris Van Looy
Earth Syst. Dynam., 9, 593–609, https://doi.org/10.5194/esd-9-593-2018, https://doi.org/10.5194/esd-9-593-2018, 2018
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Juliane Filser, Jack H. Faber, Alexei V. Tiunov, Lijbert Brussaard, Jan Frouz, Gerlinde De Deyn, Alexei V. Uvarov, Matty P. Berg, Patrick Lavelle, Michel Loreau, Diana H. Wall, Pascal Querner, Herman Eijsackers, and Juan José Jiménez
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Soils store more than 3 times as much carbon than the atmosphere, but global carbon models still suffer from large uncertainty. We argue that this may be due to the fact that soil animals are not taken into account in such models. They dig, eat and distribute dead organic matter and microorganisms, and the quantity of their activity is often huge. Soil animals affect microbial activity, soil water content, soil structure, erosion and plant growth – and all of this affects carbon cycling.
E. Ashley Shaw, Karolien Denef, Cecilia Milano de Tomasel, M. Francesca Cotrufo, and Diana H. Wall
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We investigated fire's effects on root decomposition and carbon (C) flow to the soil food web. We used 13C-labeled dead roots buried in microcosms constructed from two burn treatment soils (annual and infrequent burn). Our results showed greater root decomposition and C flow to the soil food web for the annual burn compared to infrequent burn treatment. Thus, roots are a more important C source for decomposers in annually burned areas where surface plant litter is frequently removed by fire.
Michael N. Gooseff, David Van Horn, Zachary Sudman, Diane M. McKnight, Kathleene A. Welch, and William B. Lyons
Biogeosciences, 13, 1723–1732, https://doi.org/10.5194/bg-13-1723-2016, https://doi.org/10.5194/bg-13-1723-2016, 2016
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The landscape of the McMurdo Dry Valleys, Antarctica has been considered quite stable. In 2012, we discovered extensive permafrost degradation along several km of Crescent Stream. Here we document the responses to water quality, specifically changes to dissolved major ion and suspended sediment characteristics. Stream nitrate concentrations were greater than observed in the stream over the previous ~ 20 years, suggesting potentially significant impacts for stream and downstream lake ecosystems.
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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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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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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.
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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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.
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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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
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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
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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
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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.
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.
Brayden Noh, Omar Wani, Kieran B. J. Dunne, and Michael P. Lamb
EGUsphere, https://doi.org/10.5194/egusphere-2023-2190, https://doi.org/10.5194/egusphere-2023-2190, 2023
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In this manuscript, we propose a methodology to generate risk maps that provide the probabilities of erosion due to river migration. This methodology uses concepts from probability theory to learn the parameter values of the river migration model from satellite data while taking into account parameter uncertainty. Our analysis shows that such geomorphic risk estimation is more reliable than models that don't explicitly consider various sources of variability and uncertainty.
Matthew C. Morriss, Benjamin Lehmann, Benjamin Campforts, George Brencher, Brianna Rick, Leif S. Anderson, Alexander L. Handwerger, Irina Overeem, and Jeffrey Moore
Earth Surf. Dynam., 11, 1251–1274, https://doi.org/10.5194/esurf-11-1251-2023, https://doi.org/10.5194/esurf-11-1251-2023, 2023
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In this paper, we investigate the 28 June 2022 collapse of the Chaos Canyon landslide in Rocky Mountain National Park, Colorado, USA. We find that the landslide was moving prior to its collapse and took place at peak spring snowmelt; temperature modeling indicates the potential presence of permafrost. We hypothesize that this landslide could be part of the broader landscape evolution changes to alpine terrain caused by a warming climate, leading to thawing alpine permafrost.
Christopher Tomsett and Julian Leyland
Earth Surf. Dynam., 11, 1223–1249, https://doi.org/10.5194/esurf-11-1223-2023, https://doi.org/10.5194/esurf-11-1223-2023, 2023
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Vegetation influences how rivers change through time, yet the way in which we analyse vegetation is limited. Current methods collect detailed data at the individual plant level or determine dominant vegetation types across larger areas. Herein, we use UAVs to collect detailed vegetation datasets for a 1 km length of river and link vegetation properties to channel evolution occurring within the study site, providing a new method for investigating the influence of vegetation on river systems.
Rabab Yassine, Ludovic Cassan, Hélène Roux, Olivier Frysou, and François Pérès
Earth Surf. Dynam., 11, 1199–1221, https://doi.org/10.5194/esurf-11-1199-2023, https://doi.org/10.5194/esurf-11-1199-2023, 2023
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Predicting river morphology evolution is very complicated, especially for mountain rivers with complex morphologies such as the Lac des Gaves reach in France. A 2D hydromorphological model was developed to reproduce the channel's evolution and provide reliable volumetric predictions while revealing the challenge of choosing adapted sediment transport and friction laws. Our model can provide decision-makers with reliable predictions to design suitable restoration measures for this reach.
Daisuke Harada and Shinji Egashira
Earth Surf. Dynam., 11, 1183–1197, https://doi.org/10.5194/esurf-11-1183-2023, https://doi.org/10.5194/esurf-11-1183-2023, 2023
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This paper proposes a method for describing large-wood behavior in terms of the convection equation and the storage equation, which are associated with active sediment erosion and deposition. Compared to the existing Lagrangian method, the proposed method can easily simulate the behavior of large wood in the flow field with active sediment transport. The method is applied to the flood disaster in the Akatani River in 2017, and the 2-D flood flow computations are successfully performed.
Hemanti Sharma and Todd A. Ehlers
Earth Surf. Dynam., 11, 1161–1181, https://doi.org/10.5194/esurf-11-1161-2023, https://doi.org/10.5194/esurf-11-1161-2023, 2023
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Seasonality in precipitation (P) and vegetation (V) influences catchment erosion (E), although which factor plays the dominant role is unclear. In this study, we performed a sensitivity analysis of E to P–V seasonality through numerical modeling. Our results suggest that P variations strongly influence seasonal variations in E, while the effect of seasonal V variations is secondary but significant. This is more pronounced in moderate and least pronounced in extreme environmental settings.
Eduardo Gomez-de la Peña, Giovanni Coco, Colin Whittaker, and Jennifer Montaño
Earth Surf. Dynam., 11, 1145–1160, https://doi.org/10.5194/esurf-11-1145-2023, https://doi.org/10.5194/esurf-11-1145-2023, 2023
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Predicting how shorelines change over time is a major challenge in coastal research. We here have turned to deep learning (DL), a data-driven modelling approach, to predict the movement of shorelines using observations from a camera system in New Zealand. The DL models here implemented succeeded in capturing the variability and distribution of the observed shoreline data. Overall, these findings indicate that DL has the potential to enhance the accuracy of current shoreline change predictions.
Anuska Narayanan, Sagy Cohen, and John Robert Gardner
EGUsphere, https://doi.org/10.5194/egusphere-2023-2271, https://doi.org/10.5194/egusphere-2023-2271, 2023
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This study investigates Amazon deforestation's profound impact 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 human activities' consequences for our planet's future.
Christoph Rettinger, Mina Tabesh, Ulrich Rüde, Stefan Vollmer, and Roy M. Frings
Earth Surf. Dynam., 11, 1097–1115, https://doi.org/10.5194/esurf-11-1097-2023, https://doi.org/10.5194/esurf-11-1097-2023, 2023
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Packing models promise efficient and accurate porosity predictions of fluvial sediment deposits. In this study, three packing models were reviewed, calibrated, and validated. Only two of the models were able to handle the continuous and large grain size distributions typically encountered in rivers. We showed that an extension by a cohesion model is necessary and developed guidelines for successful predictions in different rivers.
Alexander A. Ermilov, Gergely Benkő, and Sándor Baranya
Earth Surf. Dynam., 11, 1061–1095, https://doi.org/10.5194/esurf-11-1061-2023, https://doi.org/10.5194/esurf-11-1061-2023, 2023
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A novel, artificial-intelligence-based riverbed sediment analysis methodology is introduced that uses underwater images to identify the characteristic sediment classes. The main novelties of the procedure are as follows: underwater images are used, the method enables continuous mapping of the riverbed along the measurement vessel’s route contrary to conventional techniques, the method is cost-efficient, and the method works without scaling.
Kelly M. Sanks, John B. Shaw, Samuel M. Zapp, José Silvestre, Ripul Dutt, and Kyle M. Straub
Earth Surf. Dynam., 11, 1035–1060, https://doi.org/10.5194/esurf-11-1035-2023, https://doi.org/10.5194/esurf-11-1035-2023, 2023
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River deltas encompass many depositional environments (like channels and wetlands) that interact to produce coastal environments that change through time. The processes leading to sedimentation in wetlands are often neglected from physical delta models. We show that wetland sedimentation constrains flow to the channels, changes sedimentation rates, and produces channels more akin to field-scale deltas. These results have implications for the management of these vulnerable coastal landscapes.
Katharina Wetterauer and Dirk Scherler
Earth Surf. Dynam., 11, 1013–1033, https://doi.org/10.5194/esurf-11-1013-2023, https://doi.org/10.5194/esurf-11-1013-2023, 2023
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In glacial landscapes, debris supply rates vary spatially and temporally. Rockwall erosion rates derived from cosmogenic 10Be concentrations in medial moraine debris at five Swiss glaciers around Pigne d'Arolla indicate an increase in erosion from the end of the Little Ice Age towards deglaciation but temporally more stable rates over the last ∼100 years. Rockwall erosion rates are higher where rockwalls are steep and north-facing, suggesting a potential slope and temperature control.
Jacob Hardt, Tim Dooley, and Michael Hudec
EGUsphere, https://doi.org/10.5194/egusphere-2023-2104, https://doi.org/10.5194/egusphere-2023-2104, 2023
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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. We investigate into the reaction of salt structures on ice sheet transgressions. We used 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.
Sam Anderson, Nicole Gasparini, and Joel Johnson
Earth Surf. Dynam., 11, 995–1011, https://doi.org/10.5194/esurf-11-995-2023, https://doi.org/10.5194/esurf-11-995-2023, 2023
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We measured rock strength and amount of fracturing in the two different rock types, sandstones and carbonates, in Last Chance Canyon, New Mexico, USA. Where there is more carbonate bedrock, hills and channels steepen in Last Chance Canyon. This is because the carbonate-type bedrock tends to be more thickly bedded, is less fractured, and is stronger. The carbonate bedrock produces larger boulders than the sandstone bedrock, which can protect the more fractured sandstone bedrock from erosion.
Jens M. Turowski, Gunnar Pruß, Anne Voigtländer, Andreas Ludwig, Angela Landgraf, Florian Kober, and Audrey Bonnelye
Earth Surf. Dynam., 11, 979–994, https://doi.org/10.5194/esurf-11-979-2023, https://doi.org/10.5194/esurf-11-979-2023, 2023
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Rivers can cut into rocks, and their strength modulates the river's erosion rates. Yet, which properties of the rock control its response to erosive action is poorly understood. Here, we describe parallel experiments to measure rock erosion rates under fluvial impact erosion and the rock's geotechnical properties such as fracture strength, elasticity, and density. Erosion rates vary over a factor of a million between different rock types. We use the data to improve current theory.
Koji Ohata, Hajime Naruse, and Norihiro Izumi
Earth Surf. Dynam., 11, 961–977, https://doi.org/10.5194/esurf-11-961-2023, https://doi.org/10.5194/esurf-11-961-2023, 2023
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We investigated the influence of sediment transport modes on the formation of bedforms using theoretical analysis. The results of the theoretical analysis were verified with published data of plane beds obtained by fieldwork and laboratory experiments. We found that suspended sand particles can promote the formation of plane beds on a fine-grained bed, which suggests that the presence of suspended particles suppresses the development of dunes under submarine sediment-laden gravity currents.
Eric Petersen, Regine Hock, and Michael G. Loso
EGUsphere, https://doi.org/10.5194/egusphere-2023-1913, https://doi.org/10.5194/egusphere-2023-1913, 2023
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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, 31.4 % of streams are actively influenced by streams, while nearly half are within 10 m of streams.
Matan Ben-Asher, Florence Magnin, Sebastian Westermann, Josué Bock, Emmanuel Malet, Johan Berthet, Ludovic Ravanel, and Philip Deline
Earth Surf. Dynam., 11, 899–915, https://doi.org/10.5194/esurf-11-899-2023, https://doi.org/10.5194/esurf-11-899-2023, 2023
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Quantitative knowledge of water availability on high mountain rock slopes is very limited. We use a numerical model and field measurements to estimate the water balance at a steep rock wall site. We show that snowmelt is the main source of water at elevations >3600 m and that snowpack hydrology and sublimation are key factors. The new information presented here can be used to improve the understanding of thermal, hydrogeological, and mechanical processes on steep mountain rock slopes.
Jessica Droujko, Srividya Hariharan Sudha, Gabriel Singer, and Peter Molnar
Earth Surf. Dynam., 11, 881–897, https://doi.org/10.5194/esurf-11-881-2023, https://doi.org/10.5194/esurf-11-881-2023, 2023
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We combined data from satellite images with data measured from a kayak in order to understand the propagation of fine sediment in the Vjosa River. We were able to find some storm-activated and some permanent sources of sediment. We also estimated how much fine sediment is carried into the Adriatic Sea by the Vjosa River: approximately 2.5 Mt per year, which matches previous findings. With our work, we hope to show the potential of open-access satellite images.
Kate C. P. Leary, Leah Tevis, and Mark Schmeeckle
Earth Surf. Dynam., 11, 835–847, https://doi.org/10.5194/esurf-11-835-2023, https://doi.org/10.5194/esurf-11-835-2023, 2023
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Despite the importance of bedforms (e.g., ripples, dunes) to sediment transport, the details of sediment transport on a sub-bedform scale are poorly understood. This paper investigates sediment transport in the downstream and cross-stream directions over bedforms with straight crests. We find that the patterns of bedload transport are highly variable on the sub-bedform scale, which is important for our understanding of the evolution of bedforms with complex crest geometries.
Daniel O'Hara, Liran Goren, Roos M. J. van Wees, Benjamin Campforts, Pablo Grosse, Pierre Lahitte, Gabor Kereszturi, and Matthieu Kervyn
EGUsphere, https://doi.org/10.5194/egusphere-2023-1921, https://doi.org/10.5194/egusphere-2023-1921, 2023
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Understanding how volcanic edifices develop drainage basins remains an unexplored aspect of 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 volcano basin develop and compare our results to basin evolution in other settings.
Paul A. Carling, John D. Jansen, Teng Su, Jane Lund Andersen, and Mads Faurschou Knudsen
Earth Surf. Dynam., 11, 817–833, https://doi.org/10.5194/esurf-11-817-2023, https://doi.org/10.5194/esurf-11-817-2023, 2023
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Many steep glaciated rock walls collapsed when the Ice Age ended. How ice supports a steep rock wall until the ice decays is poorly understood. A collapsed rock wall was surveyed in the field and numerically modelled. Cosmogenic exposure dates show it collapsed and became ice-free ca. 18 ka ago. The model showed that the rock wall failed very slowly because ice was buttressing the slope. Dating other collapsed rock walls can improve understanding of how and when the last Ice Age ended.
Paul A. Jarvis, Clement Narteau, Olivier Rozier, and Nathalie M. Vriend
Earth Surf. Dynam., 11, 803–815, https://doi.org/10.5194/esurf-11-803-2023, https://doi.org/10.5194/esurf-11-803-2023, 2023
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Sand dune migration velocity is inversely proportional to dune size. Consequently, smaller, faster dunes can collide with larger, slower downstream dunes. Such collisions can result in either coalescence or ejection, whereby the dunes exchange mass but remain separate. Our numerical simulations show that the outcome depends probabilistically on the dune size ratio, which we describe through an empirical function. Our numerical predictions compare favourably against experimental observations.
Adrian Ringenbach, Peter Bebi, Perry Bartelt, Andreas Rigling, Marc Christen, Yves Bühler, Andreas Stoffel, and Andrin Caviezel
Earth Surf. Dynam., 11, 779–801, https://doi.org/10.5194/esurf-11-779-2023, https://doi.org/10.5194/esurf-11-779-2023, 2023
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Swiss researchers carried out repeated rockfall experiments with rocks up to human sizes in a steep mountain forest. This study focuses mainly on the effects of the rock shape and lying deadwood. In forested areas, cubic-shaped rocks showed a longer mean runout distance than platy-shaped rocks. Deadwood especially reduced the runouts of these cubic rocks. The findings enrich standard practices in modern rockfall hazard zoning assessments and strongly urge the incorporation of rock shape effects.
Colin K. Bloom, Corinne Singeisen, Timothy Stahl, Andrew Howell, and Chris Massey
Earth Surf. Dynam., 11, 757–778, https://doi.org/10.5194/esurf-11-757-2023, https://doi.org/10.5194/esurf-11-757-2023, 2023
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Earthquakes can cause damaging coastal cliff retreat, but we have a limited understanding of how these infrequent events influence multidecadal retreat. This makes hazard planning a challenge. In this study, we use historic aerial images to measure coastal cliff-top retreat at a site in New Zealand. We find that earthquakes account for close to half of multidecadal retreat at this site, and our results have helped us to develop tools for estimating the influence of earthquakes at other sites.
Rishitosh K. Sinha, Dwijesh Ray, Tjalling De Haas, Susan J. Conway, and Axel Noblet
Earth Surf. Dynam., 11, 713–730, https://doi.org/10.5194/esurf-11-713-2023, https://doi.org/10.5194/esurf-11-713-2023, 2023
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Our detailed investigation of Martian gullies formed in different substrates in 29 craters distributed between 30°–75° S latitude suggests that they can be differentiated from one another in terms of (1) morphology and length of alcoves and (2) mean gradient of the gully fans. The comparison between the Melton ratio, alcove length, and fan gradient of Martian and terrestrial gullies suggests that Martian gullies were likely formed by terrestrial debris-flow-like processes in the past.
Christopher J. Skinner and Thomas J. Coulthard
Earth Surf. Dynam., 11, 695–711, https://doi.org/10.5194/esurf-11-695-2023, https://doi.org/10.5194/esurf-11-695-2023, 2023
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Landscape evolution models allow us to simulate the way the Earth's surface is shaped and help us to understand relevant processes, in turn helping us to manage landscapes better. The models typically represent the land surface using a grid of square cells of equal size, averaging heights in those squares. This study shows that the size chosen by the modeller for these grid cells is important, with larger sizes making sediment output events larger but less frequent.
Hossein Hosseiny, Claire C. Masteller, Jedidiah E. Dale, and Colin B. Phillips
Earth Surf. Dynam., 11, 681–693, https://doi.org/10.5194/esurf-11-681-2023, https://doi.org/10.5194/esurf-11-681-2023, 2023
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It is of great importance to engineers and geomorphologists to predict the rate of bed load in rivers. In this contribution, we used a large dataset of measured data and developed an artificial neural network (ANN), a machine learning algorithm, for bed load prediction. The ANN model predicted the bed load flux close to measured values and better than the ones obtained from four standard bed load models with varying degrees of complexity.
Ian Delaney, Leif Anderson, and Frédéric Herman
Earth Surf. Dynam., 11, 663–680, https://doi.org/10.5194/esurf-11-663-2023, https://doi.org/10.5194/esurf-11-663-2023, 2023
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This paper presents a two-dimensional subglacial sediment transport model that evolves a sediment layer in response to subglacial sediment transport conditions. The model captures sediment transport in supply- and transport-limited regimes across a glacier's bed and considers both the creation and transport of sediment. Model outputs show how the spatial distribution of sediment and water below a glacier can impact the glacier's discharge of sediment and erosion of bedrock.
Sam Y. J. Huang, Steven Y. J. Lai, Ajay B. Limaye, Brady Z. Foreman, and Chris Paola
Earth Surf. Dynam., 11, 615–632, https://doi.org/10.5194/esurf-11-615-2023, https://doi.org/10.5194/esurf-11-615-2023, 2023
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We use experiments and a model to study the effects of confinement width and the inflow-to-sediment discharge ratio on the evolution of submarine braided channels. We find that confinement width controls most of the morphological changes. These trends are consistent for submarine braided channels both with and without confinement width effects and similar to fluvial braided rivers. Furthermore, we built a model that can simulate the flow bifurcation and confluence of submarine braided channels.
Gregory Ruetenik, Ken Ferrier, and Odin Marc
EGUsphere, https://doi.org/10.5194/egusphere-2023-1278, https://doi.org/10.5194/egusphere-2023-1278, 2023
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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.
Cited articles
Ackert, R. P. and Kurz, M. D.: Age and uplift rates of Sirius Group sediments in the Dominion Range, Antarctica, from surface exposure dating and geomorphology, Global Planet. Change, 42, 207–225,
https://doi.org/10.1016/j.gloplacha.2004.02.001, 2004.
Anderson, J. B., Shipp, S. S., Lowe, A. L., Wellner, J. S., and Mosola, A.
B.: The Antarctic Ice Sheet during the Last Glacial Maximum and its subsequent retreat history: a review, Quaternary Sci. Rev., 21, 49–70,
https://doi.org/10.1016/S0277-3791(01)00083-X, 2002.
Augustin, L., Barbante, C., Barnes, P. R. F., Barnola, J. M., Bigler, M.,
Castellano, E., Cattani, O., Chappellaz, J., Dahl-Jensen, D., Delmonte, B.,
Dreyfus, G., Durand, G., Falourd, S., Fischer, H., Flückiger, J., Hansson, M. E., Huybrechts, P., Jugie, G., Johnsen, S. J., Jouzel, J.,
Kaufmann, P., Kipfstuhl, J., Lambert, F., Lipenkov, V. Y., Littot, G. C.,
Longinelli, A., Lorrain, R., Maggi, V., Masson-Delmotte, V., Miller, H.,
Mulvaney, R., Oerlemans, J., Oerter, H., Orombelli, G., Parrenin, F., Peel,
D. A., Petit, J. R., Raynaud, D., Ritz, C., Ruth, U., Schwander, J.,
Siegenthaler, U., Souchez, R., Stauffer, B., Steffensen, J. P., Stenni, B.,
Stocker, T. F., Tabacco, I. E., Udisti, R., van de Wal, R. S. W., van den
Broeke, M., Weiss, J., Wilhelms, F., Winther, J. G., Wolff, E. W., and
Zucchelli, M.: Eight glacial cycles from an Antarctic ice core, Nature,
429, 623–628, https://doi.org/10.1038/nature02599, 2004.
Balter-Kennedy, A., Bromley, G., Balco, G., Thomas, H., and Jackson, M. S.: A
14.5-million-year record of East Antarctic Ice Sheet fluctuations from the
central Transantarctic Mountains, constrained with cosmogenic 3He, 10Be, 21Ne, and 26Al, The Cryosphere, 14, 2647–2672, https://doi.org/10.5194/tc-14-2647-2020, 2020.
Barrett, P. J.: Resolving views on Antarctic Neogene glacial history – The
Sirius debate, Earth Environ. Sci. Trans. R. Soc. Edinburgh, 104, 31–53,
https://doi.org/10.1017/S175569101300008X, 2013.
Barrett, P. J., Adams, C. J., McIntosh, W. C., Swisher, C. C., and Wilson, G. S.: Geochronological evidence supporting Antarctic deglaciation three million years ago, Nature, 359, 816–818, 1992.
Bierman, P. R., Corbett, L. B., Graly, J. A., Neumann, T. A., Lini, A.,
Crosby, B. T., and Rood, D. H.: Preservation of a Preglacial Landscape Under
the Center of the Greenland Ice Sheet, Science, 344, 402–405,
https://doi.org/10.4159/harvard.9780674430501.c21, 2014.
Bockheim, J. G.: Landform and Soil Development in the McMurdo Dry Valleys,
Antarctica: A Regional Synthesis, Arctic, Antarct. Alp. Res., 34, 308–317, https://doi.org/10.1080/15230430.2002.12003499, 2002.
Bromley, G. R. M., Hall, B. L., Stone, J. O., Conway, H., and Todd, C. E.:
Late Cenozoic deposits at Reedy Glacier, Transantarctic Mountains: implications for former thickness of the West Antarctic Ice Sheet, Quaternary
Sci. Rev., 29, 384–398, https://doi.org/10.1016/j.quascirev.2009.07.001, 2010.
Brown, E. T., Edmond, J. M., Raisbeck, G. M., Bourlès, D. L., Yiou, F.,
and Measures, C. I.: Beryllium isotope geochemistry in tropical river basins, Geochim. Cosmochim. Ac., 56, 1607–1624, https://doi.org/10.1016/0016-7037(92)90228-B, 1992.
Cary, S. C., McDonald, I. R., Barrett, J. E., and Cowan, D. A.: On the rocks:
The microbiology of Antarctic Dry Valley soils, Nat. Rev. Microbiol., 8,
129–138, https://doi.org/10.1038/nrmicro2281, 2010.
Claridge, G. G. C. and Campbell, I. B.: Origin of nitrate deposits, Nature, 217, 428–430, https://doi.org/10.1038/217428a0, 1968a.
Claridge, G. G. C. and Campbell, I. B.: Soils of the Shackleton glacier region, Queen Maud Range, Antarctica, New Zeal. J. Sci., 11, 171–218, 1968b.
Claridge, G. G. C. and Campbell, I. B.: Salts in Antarctic soils, their
distribution and relationship to soil processes, Soil Sci., 123, 377–384, 1977.
Clark, P. U., Dyke, A. S., Shakun, J. D., Carlson, A. E., Clark, J., Wohlfarth, B., Mitrovica, J. X., Hostetler, S. W., and McCabe, A. M.: The Last Glacial Maximum, Science, 325, 710–714, https://doi.org/10.1126/science.1172873, 2009.
Collins, G. E., Hogg, I. D., Convey, P., Sancho, L. G., Cowan, D. A., Lyons,
W. B., Adams, B. J., Wall, D. H., and Green, T. G. A.: Genetic diversity of
soil invertebrates corroborates timing estimates for past collapses of the
West Antarctic Ice Sheet, P. Natl. Acad. Sci. USA, 117, 22293–22302, https://doi.org/10.1073/pnas.2007925117, 2020.
Convey, P., Gibson, J. A. E., Hillenbrand, C. D., Hodgson, D. A., Pugh, P.
J. A., Smellie, J. L., and Stevens, M. I.: Antarctic terrestrial life –
Challenging the history of the frozen continent?, Biol. Rev., 83, 103–117, https://doi.org/10.1111/j.1469-185X.2008.00034.x, 2008.
Diaz, M. A., Li, J., Michalski, G., Darrah, T. H., Adams, B. J., Wall, D.
H., Hogg, I. D., Fierer, N., Welch, S. A., Gardner, C. B., and Lyons, W. B.:
Stable isotopes of nitrate, sulfate, and carbonate in soils from the Transantarctic Mountains, Antarctica: A record of atmospheric deposition and
chemical weathering, Front. Earth Sci., 8, 341, https://doi.org/10.3389/feart.2020.00341, 2020.
Diaz, M. A., Corbett, L. B., Bierman, P. R., Adams, B. J., Wall, D. H., Hogg, I. D., Fierer, N., and Lyons, W. B.: Meteoric 10Be data of soils from the Shackleton Glacier region, US Antarctic Program (USAP) Data Center [data set], https://doi.org/10.15784/601421, 2021.
Dickinson, W. W., Schiller, M., Ditchburn, B. G., Graham, I. J., and Zondervan, A.: Meteoric Be-10 from Sirius Group suggests high elevation McMurdo Dry Valleys permanently frozen since 6 Ma, Earth Planet. Sc. Lett.,
355–356, 13–19, https://doi.org/10.1016/j.epsl.2012.09.003, 2012.
Ebert, K., Willenbring, J., Norton, K. P., Hall, A., and Hättestrand, C.:
Meteoric 10Be concentrations from saprolite and till in northern Sweden:
Implications for glacial erosion and age, Quatern. Geochronol., 12, 11–22,
https://doi.org/10.1016/j.quageo.2012.05.005, 2012.
Elliot, D. H. and Fanning, C. M.: Detrital zircons from upper Permian and
lower Triassic Victoria Group sandstones, Shackleton Glacier region, Antarctica: Evidence for multiple sources along the Gondwana plate margin,
Gondwana Res., 13, 259–274, https://doi.org/10.1016/j.gr.2007.05.003, 2008.
Elliot, D. H., Collinson, J. W., and Green, W. J.: Lakes in dry valleys at
85∘ S near Mount Heekin, Shackleton Glacier, Antarct. J. United
States, 31, 25–27, 1996.
Everett, K. R.: Soils Of The Meserve Glacier Area, Wright Valley, South Victoria Land, Antarctica, Soil Sci., 112, 425–438, 1971.
Fraser, C. I., Nikula, R., Ruzzante, D. E., and Waters, J. M.: Poleward bound: Biological impacts of Southern Hemisphere glaciation, Trends Ecol. Evol., 27, 462–471, https://doi.org/10.1016/j.tree.2012.04.011, 2012.
Frey, M. M., Savarino, J., Morin, S., Erbland, J., and Martins, J. M. F.:
Photolysis imprint in the nitrate stable isotope signal in snow and atmosphere of East Antarctica and implications for reactive nitrogen cycling, Atmos. Chem. Phys., 9, 8681–8696, https://doi.org/10.5194/acp-9-8681-2009, 2009.
Gasson, E., DeConto, R. M., Pollard, D., and Levy, R. H.: Dynamic Antarctic
ice sheet during the early to mid-Miocene, P. Natl. Acad. Sci. USA, 113, 3459–3464, https://doi.org/10.1073/pnas.1516130113, 2016.
Golledge, N. R., Fogwill, C. J., Mackintosh, A. N., and Buckley, K. M.: Dynamics of the last glacial maximum Antarctic ice-sheet and its response to
ocean forcing, P. Natl. Acad. Sci. USA, 109, 16052–16056,
https://doi.org/10.1073/pnas.1205385109, 2012.
Golledge, N. R., Levy, R. H., McKay, R. M., Fogwill, C. J., White, D. A.,
Graham, A. G. C., Smith, J. A., Hillenbrand, C. D., Licht, K. J., Denton, G.
H., Ackert, R. P., Maas, S. M., and Hall, B. L.: Glaciology and geological
signature of the Last Glacial Maximum Antarctic ice sheet, Quaternary Sci. Rev., 78, 225–247, https://doi.org/10.1016/j.quascirev.2013.08.011, 2013.
Graham, I., Ditchburn, R. G., Claridge, G. G. G., Whitehead, N. E., Zondervan, A., and Sheppard, D. S.: Dating Antarctic soils using atmospheric
derived 10Be and nitrate, R. Soc. New Zeal. Bull., 35, 429–436, 2002.
Graham, I. J., Ditchbum, R. G., Sparks, R. J., and Whitehead, N. E.: 10Be investigations of sediments, soils and loess at GNS, Nucl. Instrum. Meth. Phys. Res. B, 123, 307–318, 1997.
Graly, J. A., Bierman, P. R., Reusser, L. J., and Pavich, M. J.: Meteoric
10Be in soil profiles – A global meta-analysis, Geochim. Cosmochim. Ac., 74, 6814–6829, https://doi.org/10.1016/j.gca.2010.08.036, 2010.
Graly, J. A., Licht, K. J., Druschel, G. K., and Kaplan, M. R.: Polar desert
chronologies through quantitative measurements of salt accumulation, Geology, 46, 351–354, https://doi.org/10.1130/G39650.1, 2018.
Gulick, S. P. S., Shevenell, A. E., Montelli, A., Fernandez, R., Smith, C.,
Warny, S., Bohaty, S. M., Sjunneskog, C., Leventer, A., Frederick, B., and
Blankenship, D. D.: Initiation and long-term instability of the East Antarctic Ice Sheet, Nature, 552, 225–229, https://doi.org/10.1038/nature25026, 2017.
Hambrey, M. J., Webb, P. N., Harwood, D. M., and Krissek, L. A.: Neogene
glacial record from the Sirius Group of the Shackleton Glacier region, central Transantarctic Mountains, Antarctica, GSA Bull., 115, 994–1015,
https://doi.org/10.1130/B25183.1, 2003.
Ivy-Ochs, S., Schluchter, C., Kubik, P. W., Dittrich-Hannen, B., and Beer,
J.: Minimum 10Be exposure ages of early Pliocene for the Table Mountain plateau and the Sirius Group at Mount Fleming, Dry Valleys, Antarctica, Geology, 23, 1007–1010, 1995.
Jackson, A., Davila, A. F., Böhlke, J. K., Sturchio, N. C., Sevanthi,
R., Estrada, N., Brundrett, M., Lacelle, D., McKay, C. P., Poghosyan, A.,
Pollard, W., and Zacny, K.: Deposition, accumulation, and alteration of Cl−,
Jones, R. S., Mackintosh, A. N., Norton, K. P., Golledge, N. R., Fogwill, C.
J., Kubik, P. W., Christl, M., and Greenwood, S. L.: Rapid Holocene thinning
of an East Antarctic outlet glacier driven by marine ice sheet instability,
Nat. Commun., 6, 9910, https://doi.org/10.1038/ncomms9910, 2015.
Kaplan, M. R., Licht, K. J., Winckler, G., Schaefer, J. M., Bader, N.,
Mathieson, C., Roberts, M., Kassab, C. M., Schwartz, R., and Graly, J. A.:
Middle to Late Pleistocene stability of the central East Antarctic Ice Sheet
at the head of Law Glacier, Geology, 45, 963–966, https://doi.org/10.1130/G39189.1, 2017.
Korschinek, G., Bergmaier, A., Faestermann, T., Gerstmann, U. C., Knie, K.,
Rugel, G., Wallner, A., Dillmann, I., Dollinger, G., von Gostomski, C. L.,
Kossert, K., Maiti, M., Poutivtsev, M., and Remmert, A.: A new value for the
half-life of 10Be by Heavy-Ion Elastic Recoil Detection and liquid
scintillation counting, Nucl. Instrum. Meth. Phys. Res. B, 268, 187–191,
https://doi.org/10.1016/j.nimb.2009.09.020, 2010.
Lewis, A. R., Marchant, D. R., Ashworth, A. C., Hedenäs, L., Hemming, S.
R., Johnson, J. V., Leng, M. J., Machlus, M. L., Newton, A. E., Raine, J.
I., Willenbring, J. K., Williams, M., and Wolfe, A. P.: Mid-Miocene cooling
and the extinction of tundra in continental Antarctica, P. Natl. Acad. Sci. USA, 105, 10676–10680, https://doi.org/10.1073/pnas.0802501105, 2008.
Lyons, W. B., Mayewski, P. A., Spencer, M. J., and Twickler, M. S.: Nitrate
concentrations in snow from remote areas: implication for the global NOx flux, Biogeochemistry, 9, 211–222, https://doi.org/10.1007/BF00000599, 1990.
Lyons, W. B., Deuerling, K., Welch, K. A., Welch, S. A., Michalski, G., Walters, W. W., Nielsen, U., Wall, D. H., Hogg, I., and Adams, B. J.: The Soil Geochemistry in the Beardmore Glacier Region, Antarctica: Implications for Terrestrial Ecosystem History, Sci. Rep., 6, 26189, https://doi.org/10.1038/srep26189, 2016.
Mackintosh, A., Golledge, N., Domack, E., Dunbar, R., Leventer, A., White,
D., Pollard, D., Deconto, R., Fink, D., Zwartz, D., Gore, D., and Lavoie, C.:
Retreat of the East Antarctic ice sheet during the last glacial termination,
Nat. Geosci., 4, 195–202, https://doi.org/10.1038/ngeo1061, 2011.
Mackintosh, A. N., Verleyen, E., O'Brien, P. E., White, D. A., Jones, R. S.,
McKay, R., Dunbar, R., Gore, D. B., Fink, D., Post, A. L., Miura, H., Leventer, A., Goodwin, I., Hodgson, D. A., Lilly, K., Crosta, X., Golledge,
N. R., Wagner, B., Berg, S., van Ommen, T., Zwartz, D., Roberts, S. J.,
Vyverman, W., and Masse, G.: Retreat history of the East Antarctic Ice Sheet
since the Last Glacial Maximum, Quaternary Sci. Rev., 100, 10–30,
https://doi.org/10.1016/j.quascirev.2013.07.024, 2014.
Marchant, D. R., Denton, G. H., Swisher, C. C., and Potter, N.: Late Cenozoic
Antarctic paleoclimate reconstructed from volcanic ashes in the Dry Valleys
region of southern Victoria Land, Geol. Soc. Am. Bull., 108, 181–194,
https://doi.org/10.1130/0016-7606(1996)108<0181:LCAPRF>2.3.CO;2, 1996.
McHargue, L. R. and Damon, P. E.: The global beryllium 10 cycle, Rev. Geophys., 29, 141–158, https://doi.org/10.1029/91RG00072, 1991.
Menzies, J., van der Meer, J. J. M., and Rose, J.: Till-as a glacial
“tectomict”, its internal architecture, and the development of a “typing” method for till differentiation, Geomorphology, 75, 172–200,
https://doi.org/10.1016/j.geomorph.2004.02.017, 2006.
Michalski, G., Bockheim, J. G., Kendall, C., and Thiemens, M.: Isotopic
composition of Antarctic Dry Valley nitrate: Implications for NOy sources and cycling in Antarctica, Geophys. Res. Lett., 32, 1–4, https://doi.org/10.1029/2004GL022121, 2005.
Morgan, D., Putkonen, J., Balco, G., and Stone, J.: Quantifying regolith
erosion rates with cosmogenic nuclides 10Be and 26Al in the McMurdo Dry Valleys, Antarctica, J. Geophys. Res., 115, F03037,
https://doi.org/10.1029/2009JF001443, 2010.
Nishiizumi, K., Imamura, M., Caffee, M. W., Southon, J. R., Finkel, R. C., and McAninch, J.: Absolute calibration of 10Be AMS standards, Nucl.
Instrum. Meth. Phys. Res. B, 258, 403–413, https://doi.org/10.1016/j.nimb.2007.01.297, 2007.
Paulsen, T. S., Encarnación, J., and Grunow, A. M.: Structure and timing
of transpressional deformation in the Shackleton Glacier area, Ross orogen,
Antarctica, J. Geol. Soc. Lond., 161, 1027–1038, https://doi.org/10.1144/0016-764903-040, 2004.
Pavich, M. J., Brown, L., Klein, J., and Middleton, R.: 10Be accumulation in a soil chronosequence, Earth Planet. Sc. Lett., 68, 198–204,
https://doi.org/10.1016/0012-821X(84)90151-1, 1984.
Pavich, M. J., Brown, L., Harden, J., Klein, J., and Middleton, R.: 10Be distribution in soils from Merced River terraces, California, Geochim. Cosmochim. Ac., 50, 1727–1735, https://doi.org/10.1016/0016-7037(86)90134-1, 1986.
Pollard, D. and DeConto, R. M.: Modelling West Antarctic ice sheet growth
and collapse through the past five million years, Nature, 458, 329–332, https://doi.org/10.1038/nature07809, 2009.
Reich, M. and Bao, H.: Nitrate deposits of the Atacama Desert: A marker of
long-term hyperaridity, Elements, 14, 251–256, https://doi.org/10.2138/gselements.14.4.251, 2018.
Scarrow, J. W., Balks, M. R., and Almond, P. C.: Three soil chronosequences
in recessional glacial deposits near the polar plateau, in the Central
Transantarctic Mountains, Antarctica, Antarct. Sci., 26, 573–583,
https://doi.org/10.1017/S0954102014000078, 2014.
Scherer, R. P., DeConto, R. M., Pollard, D., and Alley, R. B.: Windblown
Pliocene diatoms and East Antarctic Ice Sheet retreat, Nat. Commun., 7, 1–9, https://doi.org/10.1038/ncomms12957, 2016.
Schiller, M., Dickinson, W., Ditchburn, R. G., Graham, I. J., and Zondervan,
A.: Atmospheric 10Be in an Antarctic soil: Implications for climate change, J. Geophys. Res., 114, 1–8, https://doi.org/10.1029/2008jf001052, 2009.
Spector, P. and Balco, G.: Exposure-age data from across Antarctica reveal
mid-Miocene establishment of polar desert climate, Geology, 49, 91–95, https://doi.org/10.1130/G47783.1, 2020.
Spector, P., Stone, J., Cowdery, S. G., Hall, B., Conway, H., and Bromley, G.: Rapid early-Holocene deglaciation in the Ross Sea, Antarctica, Geophys. Res. Lett., 44, 7817–7825, https://doi.org/10.1002/2017GL074216, 2017.
Steig, E., Stuiver, M., and Polissar, P.: Cosmogenic isotope concentrations at Taylor Dome, Antarctica, Antarct. J. United States, 30, 95–97, 1995.
Stevens, M. I. and Hogg, I. D.: Long-term isolation and recent range expansion from glacial refugia revealed for the endemic springtail
Gomphiocephalus hodgsoni from Victoria Land, Antarctica, Mol. Ecol., 12, 2357–2369, https://doi.org/10.1046/j.1365-294X.2003.01907.x, 2003.
Stone, J.: A rapid fusion method for separation of beryllium-10 from soils
and silicates, Geochim. Cosmochim. Ac., 62, 555–561, https://doi.org/10.1016/S0016-7037(97)00340-2, 1998.
Stroeven, A. P., Prentice, M. L., and Kleman, J.: On marine microfossil
transport and pathways in Antarctica during the late Neogene: Evidence from
the Sirius Group at Mount Fleming, Geology, 24, 727–730,
https://doi.org/10.1130/0091-7613(1996)024<0727:ommtap>2.3.co;2, 1996.
Sugden, D. E., Marchant, D. R., and Denton, G. H.: The case for a stable East
Antarctic ice sheet, Geogr. Ann. A, 75, 151–351, 1993.
Talarico, F. M., McKay, R. M., Powell, R. D., Sandroni, S., and Naish, T.:
Late Cenozoic oscillations of Antarctic ice sheets revealed by provenance of
basement clasts and grain detrital modes in ANDRILL core AND-1B, Global Planet. Change, 96–97, 23–40, https://doi.org/10.1016/j.gloplacha.2009.12.002, 2012.
Valletta, R. D., Willenbring, J. K., Lewis, A. R., Ashworth, A. C., and Caffee, M.: Extreme decay of meteoric beryllium-10 as a proxy for persistent
aridity, Sci. Rep., 5, 17813, https://doi.org/10.1038/srep17813, 2015.
Webb, P. N. and Harwood, D. M.: Late Cenozoic glacial history of the Ross
embayment, Antarctica, Quaternary Sci. Rev., 10, 215–223,
https://doi.org/10.1016/0277-3791(91)90020-U, 1991.
Webb, P. N., Harwood, D. M., McKelvey, B. C., Mercer, J. H., and Stott, L.
D.: Cenozoic marine sedimentation and ice-volume variation on the East
Antarctic craton, Geology, 12, 287–291,
https://doi.org/10.1130/0091-7613(1984)12<287:cmsaiv>2.0.co;2, 1984.
Webb, P. N., Harwood, D. M., Mabin, M. G. C., and McKelvey, B. C.: A marine and terrestrial Sirius Group succession, middle Beardmore Glacier-Queen
Alexandra Range, Transantarctic Mountains, Antarctica, Mar. Micropaleontol.,
27, 273–297, https://doi.org/10.1016/0377-8398(95)00066-6, 1996.
Welch, K. A., Lyons, W. B., Whisner, C., Gardner, C. B., Gooseff, M. N., Mcknight, D. M., and Priscu, J. C.: Spatial variations in the geochemistry of
glacial meltwater streams in the Taylor Valley, Antarctica, Antarct. Sci., 22, 662–672, https://doi.org/10.1017/S0954102010000702, 2010.
Willenbring, J. K. and von Blanckenburg, F.: Meteoric cosmogenic Beryllium-10 adsorbed to river sediment and soil: Applications for Earth-surface dynamics, Earth-Sci. Rev., 98, 105–122, https://doi.org/10.1016/j.earscirev.2009.10.008, 2010.
Wilson, G. S.: The neogene east antarctic ice sheet: A dynamic or stable
feature?, Quaternary Sci. Rev., 14, 101–123, https://doi.org/10.1016/0277-3791(95)00002-7, 1995.
You, C. F., Lee, T., and Li, Y. H.: The partition of Be between soil and
water, Chem. Geol., 77, 105–118, https://doi.org/10.1016/0009-2541(89)90136-8, 1989.
Short summary
We collected soil surface samples and depth profiles every 5 cm (up to 30 cm) from 11 ice-free areas along the Shackleton Glacier, a major outlet glacier of the East Antarctic Ice Sheet (EAIS), and measured meteoric beryllium-10 and nitrate concentrations to understand the relationship between salts and beryllium-10. This relationship can help inform wetting history, landscape disturbance, and exposure duration.
We collected soil surface samples and depth profiles every 5 cm (up to 30 cm) from 11 ice-free...
