Article
Geosciences, Multidisciplinary
Riley Culberg, Winnie Chu, Dustin M. Schroeder
Summary: A recent study found extensive infiltration and refreezing of meltwater beneath ice slabs in Greenland, where the meltwater enters through surface crevasses into relict firn. This suggests that the firn can continue to buffer mass loss from surface runoff and limit meltwater export to the subglacial system even after ice slabs have formed. There may be a significant time lag between the formation of ice slabs and the complete surface runoff and meltwater drainage to the subglacial system.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geography, Physical
Janis Karuss, Kristaps Lamsters, Ireneusz Sobota, Jurijs Jeskins, Peteris Dzerins, Andrew Hodson
Summary: The study of the thermal structure and drainage system of Waldemarbreen shows that hydrofracturing at higher elevations can play a major role in englacial water drainage through cold ice, in contrast to the cut and closure mechanism forming conduits in parts of the lower ablation area.
JOURNAL OF GLACIOLOGY
(2022)
Article
Geography, Physical
Jonathan L. Carrivick, Mark W. Smith, Jenna L. Sutherland, Michael Grimes
Summary: This study investigates the response of land-terminating glaciers in Greenland to climate change. The research finds that there has been minimal change in the rate of volume loss of the glaciers since the Little Ice Age. However, the percentage of each glacier composed of cold-based ice has increased by around 20%. These findings indicate a transition towards a colder thermal regime despite a warming regional climate.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Article
Environmental Sciences
Stuart Anderson
Summary: HF radars are commonly used for remote sensing of ocean surface conditions, ionospheric studies, and monitoring of ship and aircraft traffic. However, their potential for sea ice remote sensing has not been fully explored. Recent advancements in the theory of HF scattering from sea surfaces with ice cover have provided new tools for interpreting radar echoes. Challenges in utilizing HF radar for ice monitoring include physical and technical constraints.
Article
Geochemistry & Geophysics
Anna L. Broome, Dustin M. Schroeder
Summary: Ice-penetrating radar sounders are essential tools for studying the conditions within and underneath Earth's ice sheets, providing crucial data for understanding dynamics of ice sheets and their impact on global sea level. A radar system with high radiometric fidelity, narrow frequency bands, and multi-frequency capability can effectively separate signals from basal material and basal roughness, allowing for precise analysis of ice sheet conditions on a pulse-by-pulse basis.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geosciences, Multidisciplinary
Adrien Gilbert, Florent Gimbert, Kjetil Thogersen, Thomas Schuler, Andreas Kaab
Summary: Below hard-bedded glaciers, both basal friction and distributed subglacial drainage are controlled by a network of cavities. Previous models had a physical inconsistency issue, but our coupling approach provides a better explanation for the observed glacier sliding speed.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Arttu Jutila, Joshua King, John Paden, Robert Ricker, Stefan Hendricks, Chris Polashenski, Veit Helm, Tobias Binder, Christian Haas
Summary: This study presents a new method for measuring high-resolution snow depth on Arctic sea ice using airborne microwave radar measurements. The method improves the accuracy of radar-derived snow depth data through calibration and data processing. The results show that the method is capable of accurately measuring snow depth on Arctic sea ice.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
David M. Chandler, Jemma L. Wadham, Peter W. Nienow, Samuel H. Doyle, Andrew J. Tedstone, Jon Telling, Jonathan Hawkings, Jonathan D. Alcock, Benjamin Linhoff, Alun Hubbard
Summary: Intensive study of the Greenland Ice Sheet's subglacial drainage has shown efficient drainage development under thick ice, with this research providing valuable data to validate and improve current numerical drainage system models. The study revealed a fast/efficient subglacial drainage system extending under ice over 900m thick, which remained stable even under variable melt inputs. This research emphasizes the importance of understanding subglacial drainage dynamics in the context of ice dynamics and hydrology.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
A. M. Solgaard, D. Rapp, B. P. Y. Noel, C. S. Hvidberg
Summary: This study analyzed high-resolution ice velocity data of the Greenland Ice Sheet using a clustering algorithm and identified characteristic seasonal flow patterns. The results showed spatial and interannual variability in these flow patterns, which are linked to water availability at the base of the ice.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Aditya R. Khuller, Jeffrey J. Plaut
Summary: Expanding on previous studies of the South Polar Layered Deposits' basal interface using Mars radar data, researchers found widespread occurrences of basal echo power exceeding the surface in the SPLD region. These high basal echo power signatures appear to be frequency independent in MARSIS data.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Mohammed Dabboor, Mohammed Shokr
Summary: By studying the evolution of CP SAR parameters in early ice growth, the research discovered the potential of CP systems in lake ice monitoring, particularly in relation to gas production activities.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Geosciences, Multidisciplinary
Benjamin H. Hills, Knut Christianson, Andrew O. Hoffman, T. J. Fudge, Nicholas Holschuh, Emma C. Kahle, Howard Conway, John E. Christian, Annika N. Horlings, Gemma K. O'Connor, Eric J. Steig
Summary: Geophysical exploration of a subglacial lake near the South Pole suggests that it has been thermodynamically stable for at least the last 120,000 years, making it a promising site for sediment coring.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Xi Zhang, Yixun Zhu, Jie Zhang, Qimao Wang, Lijian Shi, Junmin Meng, Chenqing Fan, Meijie Liu, Genwang Liu, Meng Bao
Summary: This study investigates the differences in waveform features of C- and Ku-band radar altimeter over different types of sea ice using the Chinese HY-2B satellite. The research proposes a methodology for sea ice classification that combines data from C- and Ku-band altimeter waveforms, showing significantly higher accuracy (up to 93.45%) compared to existing methods.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2021)
Article
Geochemistry & Geophysics
Anna Mangilli, Pierre Thibaut, Claude R. Duguay, Justin Murfitt
Summary: A novel and efficient method (retracking approach) is proposed in this study for estimating lake ice thickness (LIT) using radar altimetry data. The method, based on physical modeling of radar echoes, provides accurate LIT estimates and shows good agreement with simulations from a thermodynamic lake ice model and in situ measurements.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
Durban G. Keeler, Summer Rupper, Richard Forster
Summary: Ice-penetrating radar can be used to reconstruct temporally stable annually resolved SMB time series, even when data collection is separated by several years.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Matthew J. Hoffman, Mauro Perego, Lauren C. Andrews, Stephen F. Price, Thomas A. Neumann, Jesse V. Johnson, Ginny Catania, Martin P. Luthi
GEOPHYSICAL RESEARCH LETTERS
(2018)
Article
Geosciences, Multidisciplinary
Lauren C. Andrews, Matthew J. Hoffman, Thomas A. Neumann, Ginny A. Catania, Martin P. Luthi, Robert L. Hawley, Kristin M. Schild, Claudia Ryser, Blaine F. Morriss
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2018)
Article
Environmental Sciences
M. P. Luethi
WATER RESOURCES RESEARCH
(2019)
Article
Meteorology & Atmospheric Sciences
R. Mercenier, M. P. Luthi, A. Vieli
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2019)
Article
Geosciences, Multidisciplinary
Loris Compagno, Guillaume Jouvet, Andreas Bauder, Martin Funk, Gregory Church, Silvan Leinss, Martin P. Luthi
FRONTIERS IN EARTH SCIENCE
(2019)
Article
Geosciences, Multidisciplinary
Guillaume Jouvet, Yvo Weidmann, Eef van Dongen, Martin P. Luthi, Andreas Vieli, Jonathan C. Ryan
FRONTIERS IN EARTH SCIENCE
(2019)
Article
Geosciences, Multidisciplinary
R. Mercenier, M. P. Luthi, A. Vieli
GEOPHYSICAL RESEARCH LETTERS
(2020)
Article
Geography, Physical
Guillaume Jouvet, Guillaume Cordonnier, Byungsoo Kim, Martin Luthi, Andreas Vieli, Andy Aschwanden
Summary: This paper introduces a model called Instructed Glacier Model (IGM), which simulates ice dynamics using a Convolutional Neural Network and a cheap emulator trained from data. It can predict the evolution of glaciers accurately and efficiently.
JOURNAL OF GLACIOLOGY
(2022)
Article
Geography, Physical
Andrea Kneib-Walter, Martin P. Luthi, Martin Funk, Guillaume Jouvet, Andreas Vieli
Summary: By studying two glaciers in Greenland, researchers have found that glaciers in different terrains and environments exhibit different flow and calving behaviors, which are also influenced by factors such as air temperature, tides, and topography.
JOURNAL OF GLACIOLOGY
(2023)
Article
Geography, Physical
Adrien Wehrle, Martin P. Luthi, Andreas Vieli
Summary: Ice melange, a dense mixture of icebergs and sea ice in Greenland's fjords, has been shown to significantly affect the dynamics of Greenland tidewater glaciers. However, the dynamics of ice melange in the shorter term are still not well understood due to its complexity and variability at the ice-ocean boundary.
Article
Geography, Physical
Adrien Wehrle, Martin P. Luthi, Andrea Walter, Guillaume Jouvet, Andreas Vieli
Summary: The study used a terrestrial radar interferometer to detect calving waves in Eqip Sermia, West Greenland, and found that calving activity was higher in deep water conditions due to more frequent subglacial meltwater plumes and more efficient calving enhancement.
Article
Geography, Physical
Andrea Walter, Martin P. Luthi, Andreas Vieli
Article
Geosciences, Multidisciplinary
Guillaume Jouvet, Eef van Dongen, Martin P. Luthi, Andreas Vieli
GEOSCIENTIFIC INSTRUMENTATION METHODS AND DATA SYSTEMS
(2020)
Article
Geography, Physical
Christoph Rohner, David Small, Daniel Henke, Martin P. Luethi, Andreas Vieli
Article
Geography, Physical
Remy Mercenier, Martin P. Luthi, Andreas Vieli