Articles | Volume 12, issue 12
https://doi.org/10.5194/tc-12-3719-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-12-3719-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Supraglacial debris thickness variability: impact on ablation and relation to terrain properties
Lindsey I. Nicholson
CORRESPONDING AUTHOR
Department of Atmospheric and Cryospheric Sciences, Universität Innsbruck, Innsbruck, Austria
Michael McCarthy
British Antarctic Survey, Natural Environment Research Council, Madingley Road, Cambridge, UK
Scott Polar Research Institute, University of Cambridge, Cambridge, UK
Hamish D. Pritchard
British Antarctic Survey, Natural Environment Research Council, Madingley Road, Cambridge, UK
Ian Willis
Scott Polar Research Institute, University of Cambridge, Cambridge, UK
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We study with simulations if changing glacier ice surfaces surrounding a glacier impacts the atmospheric structure. Under North-Westerly flow conditions, a gravity wave forms over the glacier. This gravity wave is, however, weakened and breaks faster, when the surrounding glaciers are removed. This leads to stronger turbulent mixing over the remaining glacier and higher temperatures. This affects glacier melting patterns, and glaciers should be studied as a system.
Calvin Beck and Lindsey Nicholson
EGUsphere, https://doi.org/10.5194/egusphere-2023-2766, https://doi.org/10.5194/egusphere-2023-2766, 2023
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A glacier’s debris cover strongly modified its mass balance in contrast to a clean ice glacier. A key parameter for calculating sub-debris melt is the thermal diffusivity of the debris layer. Conway and Rasmussen (2000) present a method to estimate this value based on simple heat diffusion principles. Our analysis shows that the selected temporal and spatial sampling intervals effects the estimated value of thermal diffusivity, resulting in glacier melt being systematically underestimated.
Adina E. Racoviteanu, Lindsey Nicholson, and Neil F. Glasser
The Cryosphere, 15, 4557–4588, https://doi.org/10.5194/tc-15-4557-2021, https://doi.org/10.5194/tc-15-4557-2021, 2021
Short summary
Short summary
Supraglacial debris cover comprises ponds, exposed ice cliffs, debris material and vegetation. Understanding these features is important for glacier hydrology and related hazards. We use linear spectral unmixing of satellite data to assess the composition of map supraglacial debris across the Himalaya range in 2015. One of the highlights of this study is the automated mapping of supraglacial ponds, which complements and expands the existing supraglacial debris and lake databases.
Rebecca Mott, Ivana Stiperski, and Lindsey Nicholson
The Cryosphere, 14, 4699–4718, https://doi.org/10.5194/tc-14-4699-2020, https://doi.org/10.5194/tc-14-4699-2020, 2020
Short summary
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The Hintereisferner Experiment (HEFEX) investigated spatial and temporal dynamics of the near-surface boundary layer and associated heat exchange processes close to the glacier surface during the melting season. Turbulence data suggest that strong changes in the local thermodynamic characteristics occur when westerly flows disturbed prevailing katabatic flow, forming across-glacier flows and facilitating warm-air advection from the surrounding ice-free areas, which potentially promote ice melt.
Tobias Zolles, Fabien Maussion, Stephan Peter Galos, Wolfgang Gurgiser, and Lindsey Nicholson
The Cryosphere, 13, 469–489, https://doi.org/10.5194/tc-13-469-2019, https://doi.org/10.5194/tc-13-469-2019, 2019
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A mass and energy balance model was subjected to sensitivity and uncertainty analysis on two different Alpine glaciers. The global sensitivity analysis allowed for a mass balance measurement independent assessment of the model sensitivity and functioned as a reduction of the model free parameter space. A novel approach of a multi-objective optimization estimates the uncertainty of the simulated mass balance and the energy fluxes. The final model uncertainty is up to 1300 kg m−3 per year.
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This study presents a reanalysis of the glacier mass balance record at Hintereisferner, Austria, for the period 2001 to 2011. We provide a year-by-year comparison of glaciological and geodetic mass balances obtained from annual airborne laser scanning data. After applying a series of corrections, a comparison of the methods reveals major differences for certain years. We thoroughly discuss the origin of these discrepancies and implications for future glaciological mass balance measurements.
Ulrich Strasser, Thomas Marke, Ludwig Braun, Heidi Escher-Vetter, Irmgard Juen, Michael Kuhn, Fabien Maussion, Christoph Mayer, Lindsey Nicholson, Klaus Niedertscheider, Rudolf Sailer, Johann Stötter, Markus Weber, and Georg Kaser
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A hydrometeorological and glaciological data set is presented with recordings from several research sites in the Rofental (1891–3772 m a.s.l., Ötztal Alps, Austria). The data sets are spanning 150 years and represent a unique pool of high mountain observations, enabling combined research of atmospheric, cryospheric and hydrological processes in complex terrain, and the development of state-of-the-art hydroclimatological and glacier mass balance models.
Anna Wirbel, Alexander H. Jarosch, and Lindsey Nicholson
The Cryosphere, 12, 189–204, https://doi.org/10.5194/tc-12-189-2018, https://doi.org/10.5194/tc-12-189-2018, 2018
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As debris cover affects the meltwater production and behaviour of glaciers it is important to understand how, and over what timescales, it forms. Here we develop an advanced 3-D numerical model that describes transport of sediment through a glacier to the point where it emerges at the surface. The numerical performance of the model is satisfactory and it reproduces debris structures observed within real-world glaciers, thereby offering a useful tool for future studies of debris-covered glaciers.
Ann V. Rowan, Lindsey Nicholson, Emily Collier, Duncan J. Quincey, Morgan J. Gibson, Patrick Wagnon, David R. Rounce, Sarah S. Thompson, Owen King, C. Scott Watson, Tristram D. L. Irvine-Fynn, and Neil F. Glasser
The Cryosphere Discuss., https://doi.org/10.5194/tc-2017-239, https://doi.org/10.5194/tc-2017-239, 2017
Revised manuscript not accepted
Short summary
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Many glaciers in the Himalaya are covered with thick layers of rock debris that acts as an insulating blanket and so reduces melting of the underlying ice. Little is known about how melt beneath supraglacial debris varies across glaciers and through the monsoon season. We measured debris temperatures across three glaciers and several years to investigate seasonal trends, and found that sub-debris ice melt can be predicted using a temperature–depth relationship with surface temperature data.
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The Cryosphere, 11, 2247–2264, https://doi.org/10.5194/tc-11-2247-2017, https://doi.org/10.5194/tc-11-2247-2017, 2017
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This paper provides the first complete view of the drainage system of a large Himalayan glacier, based on ice-cave exploration and satellite image analysis. Drainage tunnels inside glaciers have a major impact on melting rates, by providing lines of weakness inside the ice and potential pathways for melt-water, and play a key role in the response of debris-covered glaciers to sustained periods of negative mass balance.
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Lindsey I. Nicholson, Michał Pętlicki, Ben Partan, and Shelley MacDonell
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An Xbox Kinect sensor was used as a close-range surface scanner to produce the first accurate 3D surface models of spikes of snow and ice (known as penitentes) that develop in cold, dry, sunny conditions. The data collected show how penitentes develop over time and how they affect the surface roughness of a glacier. These surface models are useful inputs to modelling studies of how penitentes alter energy exchanges between the atmosphere and the surface and how this affects meltwater production.
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The Cryosphere, 10, 133–148, https://doi.org/10.5194/tc-10-133-2016, https://doi.org/10.5194/tc-10-133-2016, 2016
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Lewis Glacier has lost > 80 % of its extent since the late 19th century. A sensitivity study using a process-based model assigns this shrinking to decreased atmospheric moisture without increasing air temperatures required. The glacier retreat implies a distinctly different coupling between the glacier's surface-air layer and its surrounding boundary layer, underlining the difficulty of deriving palaeoclimates for larger glacier extents on the basis of modern measurements of small glaciers.
E. Collier, F. Maussion, L. I. Nicholson, T. Mölg, W. W. Immerzeel, and A. B. G. Bush
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EGUsphere, https://doi.org/10.5194/egusphere-2024-2634, https://doi.org/10.5194/egusphere-2024-2634, 2024
Short summary
Short summary
We study with simulations if changing glacier ice surfaces surrounding a glacier impacts the atmospheric structure. Under North-Westerly flow conditions, a gravity wave forms over the glacier. This gravity wave is, however, weakened and breaks faster, when the surrounding glaciers are removed. This leads to stronger turbulent mixing over the remaining glacier and higher temperatures. This affects glacier melting patterns, and glaciers should be studied as a system.
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EGUsphere, https://doi.org/10.5194/egusphere-2023-2766, https://doi.org/10.5194/egusphere-2023-2766, 2023
Short summary
Short summary
A glacier’s debris cover strongly modified its mass balance in contrast to a clean ice glacier. A key parameter for calculating sub-debris melt is the thermal diffusivity of the debris layer. Conway and Rasmussen (2000) present a method to estimate this value based on simple heat diffusion principles. Our analysis shows that the selected temporal and spatial sampling intervals effects the estimated value of thermal diffusivity, resulting in glacier melt being systematically underestimated.
Alice C. Frémand, Peter Fretwell, Julien A. Bodart, Hamish D. Pritchard, Alan Aitken, Jonathan L. Bamber, Robin Bell, Cesidio Bianchi, Robert G. Bingham, Donald D. Blankenship, Gino Casassa, Ginny Catania, Knut Christianson, Howard Conway, Hugh F. J. Corr, Xiangbin Cui, Detlef Damaske, Volkmar Damm, Reinhard Drews, Graeme Eagles, Olaf Eisen, Hannes Eisermann, Fausto Ferraccioli, Elena Field, René Forsberg, Steven Franke, Shuji Fujita, Yonggyu Gim, Vikram Goel, Siva Prasad Gogineni, Jamin Greenbaum, Benjamin Hills, Richard C. A. Hindmarsh, Andrew O. Hoffman, Per Holmlund, Nicholas Holschuh, John W. Holt, Annika N. Horlings, Angelika Humbert, Robert W. Jacobel, Daniela Jansen, Adrian Jenkins, Wilfried Jokat, Tom Jordan, Edward King, Jack Kohler, William Krabill, Mette Kusk Gillespie, Kirsty Langley, Joohan Lee, German Leitchenkov, Carlton Leuschen, Bruce Luyendyk, Joseph MacGregor, Emma MacKie, Kenichi Matsuoka, Mathieu Morlighem, Jérémie Mouginot, Frank O. Nitsche, Yoshifumi Nogi, Ole A. Nost, John Paden, Frank Pattyn, Sergey V. Popov, Eric Rignot, David M. Rippin, Andrés Rivera, Jason Roberts, Neil Ross, Anotonia Ruppel, Dustin M. Schroeder, Martin J. Siegert, Andrew M. Smith, Daniel Steinhage, Michael Studinger, Bo Sun, Ignazio Tabacco, Kirsty Tinto, Stefano Urbini, David Vaughan, Brian C. Welch, Douglas S. Wilson, Duncan A. Young, and Achille Zirizzotti
Earth Syst. Sci. Data, 15, 2695–2710, https://doi.org/10.5194/essd-15-2695-2023, https://doi.org/10.5194/essd-15-2695-2023, 2023
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This paper presents the release of over 60 years of ice thickness, bed elevation, and surface elevation data acquired over Antarctica by the international community. These data are a crucial component of the Antarctic Bedmap initiative which aims to produce a new map and datasets of Antarctic ice thickness and bed topography for the international glaciology and geophysical community.
Shuhong Wang, Jintao Liu, Hamish D. Pritchard, Linghong Ke, Xiao Qiao, Jie Zhang, Weihua Xiao, and Yuyan Zhou
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We assessed and compared the glacier areal retreat rate and surface thinning rate and the effects of topography, debris cover and proglacial lakes in the west Nyainqentanglha Range (WNT) during 1976–2000 and 2000–2020. Our study will help us to better understand the glacier change characteristics in the WNT on a long timescale and will serve as a reference for glacier changes in other regions on the Tibetan Plateau.
Karla Boxall, Frazer D. W. Christie, Ian C. Willis, Jan Wuite, and Thomas Nagler
The Cryosphere, 16, 3907–3932, https://doi.org/10.5194/tc-16-3907-2022, https://doi.org/10.5194/tc-16-3907-2022, 2022
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Using high-spatial- and high-temporal-resolution satellite imagery, we provide the first evidence for seasonal flow variability of land ice draining to George VI Ice Shelf (GVIIS), Antarctica. Ultimately, our findings imply that other glaciers in Antarctica may be susceptible to – and/or currently undergoing – similar ice-flow seasonality, including at the highly vulnerable and rapidly retreating Pine Island and Thwaites glaciers.
Adina E. Racoviteanu, Lindsey Nicholson, and Neil F. Glasser
The Cryosphere, 15, 4557–4588, https://doi.org/10.5194/tc-15-4557-2021, https://doi.org/10.5194/tc-15-4557-2021, 2021
Short summary
Short summary
Supraglacial debris cover comprises ponds, exposed ice cliffs, debris material and vegetation. Understanding these features is important for glacier hydrology and related hazards. We use linear spectral unmixing of satellite data to assess the composition of map supraglacial debris across the Himalaya range in 2015. One of the highlights of this study is the automated mapping of supraglacial ponds, which complements and expands the existing supraglacial debris and lake databases.
Corinne L. Benedek and Ian C. Willis
The Cryosphere, 15, 1587–1606, https://doi.org/10.5194/tc-15-1587-2021, https://doi.org/10.5194/tc-15-1587-2021, 2021
Short summary
Short summary
The surface of the Greenland Ice Sheet contains thousands of surface lakes. These lakes can deliver water through cracks to the ice sheet base and influence the speed of ice flow. Here we look at instances of lakes draining in the middle of winter using the Sentinel-1 radar satellites. Winter-draining lakes can help us understand the mechanisms for lake drainages throughout the year and can point to winter movement of water that will impact our understanding of ice sheet hydrology.
Rebecca Mott, Ivana Stiperski, and Lindsey Nicholson
The Cryosphere, 14, 4699–4718, https://doi.org/10.5194/tc-14-4699-2020, https://doi.org/10.5194/tc-14-4699-2020, 2020
Short summary
Short summary
The Hintereisferner Experiment (HEFEX) investigated spatial and temporal dynamics of the near-surface boundary layer and associated heat exchange processes close to the glacier surface during the melting season. Turbulence data suggest that strong changes in the local thermodynamic characteristics occur when westerly flows disturbed prevailing katabatic flow, forming across-glacier flows and facilitating warm-air advection from the surrounding ice-free areas, which potentially promote ice melt.
Rebecca Dell, Neil Arnold, Ian Willis, Alison Banwell, Andrew Williamson, Hamish Pritchard, and Andrew Orr
The Cryosphere, 14, 2313–2330, https://doi.org/10.5194/tc-14-2313-2020, https://doi.org/10.5194/tc-14-2313-2020, 2020
Short summary
Short summary
A semi-automated method is developed from pre-existing work to track surface water bodies across Antarctic ice shelves over time, using data from Sentinel-2 and Landsat 8. This method is applied to the Nivlisen Ice Shelf for the 2016–2017 melt season. The results reveal two large linear meltwater systems, which hold 63 % of the peak total surface meltwater volume on 26 January 2017. These meltwater systems migrate towards the ice shelf front as the melt season progresses.
Tobias Zolles, Fabien Maussion, Stephan Peter Galos, Wolfgang Gurgiser, and Lindsey Nicholson
The Cryosphere, 13, 469–489, https://doi.org/10.5194/tc-13-469-2019, https://doi.org/10.5194/tc-13-469-2019, 2019
Short summary
Short summary
A mass and energy balance model was subjected to sensitivity and uncertainty analysis on two different Alpine glaciers. The global sensitivity analysis allowed for a mass balance measurement independent assessment of the model sensitivity and functioned as a reduction of the model free parameter space. A novel approach of a multi-objective optimization estimates the uncertainty of the simulated mass balance and the energy fluxes. The final model uncertainty is up to 1300 kg m−3 per year.
Andrew G. Williamson, Alison F. Banwell, Ian C. Willis, and Neil S. Arnold
The Cryosphere, 12, 3045–3065, https://doi.org/10.5194/tc-12-3045-2018, https://doi.org/10.5194/tc-12-3045-2018, 2018
Short summary
Short summary
A new approach is presented for automatically monitoring changes to area and volume of surface lakes on the Greenland Ice Sheet using Landsat 8 and Sentinel-2 satellite data. The dual-satellite record improves on previous work since it tracks changes to more lakes (including small ones), identifies more lake-drainage events, and has higher precision. The results also show that small lakes are important in ice-sheet hydrology as they route more surface run-off into the ice sheet than large lakes.
Christoph Klug, Erik Bollmann, Stephan Peter Galos, Lindsey Nicholson, Rainer Prinz, Lorenzo Rieg, Rudolf Sailer, Johann Stötter, and Georg Kaser
The Cryosphere, 12, 833–849, https://doi.org/10.5194/tc-12-833-2018, https://doi.org/10.5194/tc-12-833-2018, 2018
Short summary
Short summary
This study presents a reanalysis of the glacier mass balance record at Hintereisferner, Austria, for the period 2001 to 2011. We provide a year-by-year comparison of glaciological and geodetic mass balances obtained from annual airborne laser scanning data. After applying a series of corrections, a comparison of the methods reveals major differences for certain years. We thoroughly discuss the origin of these discrepancies and implications for future glaciological mass balance measurements.
Ulrich Strasser, Thomas Marke, Ludwig Braun, Heidi Escher-Vetter, Irmgard Juen, Michael Kuhn, Fabien Maussion, Christoph Mayer, Lindsey Nicholson, Klaus Niedertscheider, Rudolf Sailer, Johann Stötter, Markus Weber, and Georg Kaser
Earth Syst. Sci. Data, 10, 151–171, https://doi.org/10.5194/essd-10-151-2018, https://doi.org/10.5194/essd-10-151-2018, 2018
Short summary
Short summary
A hydrometeorological and glaciological data set is presented with recordings from several research sites in the Rofental (1891–3772 m a.s.l., Ötztal Alps, Austria). The data sets are spanning 150 years and represent a unique pool of high mountain observations, enabling combined research of atmospheric, cryospheric and hydrological processes in complex terrain, and the development of state-of-the-art hydroclimatological and glacier mass balance models.
Anna Wirbel, Alexander H. Jarosch, and Lindsey Nicholson
The Cryosphere, 12, 189–204, https://doi.org/10.5194/tc-12-189-2018, https://doi.org/10.5194/tc-12-189-2018, 2018
Short summary
Short summary
As debris cover affects the meltwater production and behaviour of glaciers it is important to understand how, and over what timescales, it forms. Here we develop an advanced 3-D numerical model that describes transport of sediment through a glacier to the point where it emerges at the surface. The numerical performance of the model is satisfactory and it reproduces debris structures observed within real-world glaciers, thereby offering a useful tool for future studies of debris-covered glaciers.
Ann V. Rowan, Lindsey Nicholson, Emily Collier, Duncan J. Quincey, Morgan J. Gibson, Patrick Wagnon, David R. Rounce, Sarah S. Thompson, Owen King, C. Scott Watson, Tristram D. L. Irvine-Fynn, and Neil F. Glasser
The Cryosphere Discuss., https://doi.org/10.5194/tc-2017-239, https://doi.org/10.5194/tc-2017-239, 2017
Revised manuscript not accepted
Short summary
Short summary
Many glaciers in the Himalaya are covered with thick layers of rock debris that acts as an insulating blanket and so reduces melting of the underlying ice. Little is known about how melt beneath supraglacial debris varies across glaciers and through the monsoon season. We measured debris temperatures across three glaciers and several years to investigate seasonal trends, and found that sub-debris ice melt can be predicted using a temperature–depth relationship with surface temperature data.
Douglas I. Benn, Sarah Thompson, Jason Gulley, Jordan Mertes, Adrian Luckman, and Lindsey Nicholson
The Cryosphere, 11, 2247–2264, https://doi.org/10.5194/tc-11-2247-2017, https://doi.org/10.5194/tc-11-2247-2017, 2017
Short summary
Short summary
This paper provides the first complete view of the drainage system of a large Himalayan glacier, based on ice-cave exploration and satellite image analysis. Drainage tunnels inside glaciers have a major impact on melting rates, by providing lines of weakness inside the ice and potential pathways for melt-water, and play a key role in the response of debris-covered glaciers to sustained periods of negative mass balance.
Stephan Peter Galos, Christoph Klug, Fabien Maussion, Federico Covi, Lindsey Nicholson, Lorenzo Rieg, Wolfgang Gurgiser, Thomas Mölg, and Georg Kaser
The Cryosphere, 11, 1417–1439, https://doi.org/10.5194/tc-11-1417-2017, https://doi.org/10.5194/tc-11-1417-2017, 2017
Lindsey I. Nicholson, Michał Pętlicki, Ben Partan, and Shelley MacDonell
The Cryosphere, 10, 1897–1913, https://doi.org/10.5194/tc-10-1897-2016, https://doi.org/10.5194/tc-10-1897-2016, 2016
Short summary
Short summary
An Xbox Kinect sensor was used as a close-range surface scanner to produce the first accurate 3D surface models of spikes of snow and ice (known as penitentes) that develop in cold, dry, sunny conditions. The data collected show how penitentes develop over time and how they affect the surface roughness of a glacier. These surface models are useful inputs to modelling studies of how penitentes alter energy exchanges between the atmosphere and the surface and how this affects meltwater production.
Edward C. King, Hamish D. Pritchard, and Andrew M. Smith
Earth Syst. Sci. Data, 8, 151–158, https://doi.org/10.5194/essd-8-151-2016, https://doi.org/10.5194/essd-8-151-2016, 2016
Short summary
Short summary
Large, fast-moving glaciers create long, linear mounds of sediments covering large areas. Understanding how these features form has been hampered by a lack of data from the bed of modern-day ice sheets. We give a detailed view of the landscape beneath an Antarctic glacier called Rutford Ice Stream. We towed a radar system back and forth across the glacier to measure the ice thickness every few metres. This is the first place such a highly detailed view of the sub-ice landscape has been created.
R. Prinz, L. I. Nicholson, T. Mölg, W. Gurgiser, and G. Kaser
The Cryosphere, 10, 133–148, https://doi.org/10.5194/tc-10-133-2016, https://doi.org/10.5194/tc-10-133-2016, 2016
Short summary
Short summary
Lewis Glacier has lost > 80 % of its extent since the late 19th century. A sensitivity study using a process-based model assigns this shrinking to decreased atmospheric moisture without increasing air temperatures required. The glacier retreat implies a distinctly different coupling between the glacier's surface-air layer and its surrounding boundary layer, underlining the difficulty of deriving palaeoclimates for larger glacier extents on the basis of modern measurements of small glaciers.
E. Collier, F. Maussion, L. I. Nicholson, T. Mölg, W. W. Immerzeel, and A. B. G. Bush
The Cryosphere, 9, 1617–1632, https://doi.org/10.5194/tc-9-1617-2015, https://doi.org/10.5194/tc-9-1617-2015, 2015
Short summary
Short summary
We investigate the impact of surface debris on glacier energy and mass fluxes and on atmosphere-glacier feedbacks in the Karakoram range, by including debris in an interactively coupled atmosphere-glacier model. The model is run from 1 May to 1 October 2004, with a simple specification of debris thickness. We find an appreciable reduction in ablation that exceeds 5m w.e. on glacier tongues, as well as significant alterations to near-surface air temperatures and boundary layer dynamics.
E. Collier, L. I. Nicholson, B. W. Brock, F. Maussion, R. Essery, and A. B. G. Bush
The Cryosphere, 8, 1429–1444, https://doi.org/10.5194/tc-8-1429-2014, https://doi.org/10.5194/tc-8-1429-2014, 2014
N. S. Arnold, A. F. Banwell, and I. C. Willis
The Cryosphere, 8, 1149–1160, https://doi.org/10.5194/tc-8-1149-2014, https://doi.org/10.5194/tc-8-1149-2014, 2014
W. Gurgiser, B. Marzeion, L. Nicholson, M. Ortner, and G. Kaser
The Cryosphere, 7, 1787–1802, https://doi.org/10.5194/tc-7-1787-2013, https://doi.org/10.5194/tc-7-1787-2013, 2013
S. MacDonell, C. Kinnard, T. Mölg, L. Nicholson, and J. Abermann
The Cryosphere, 7, 1513–1526, https://doi.org/10.5194/tc-7-1513-2013, https://doi.org/10.5194/tc-7-1513-2013, 2013
L. I. Nicholson, R. Prinz, T. Mölg, and G. Kaser
The Cryosphere, 7, 1205–1225, https://doi.org/10.5194/tc-7-1205-2013, https://doi.org/10.5194/tc-7-1205-2013, 2013
P. Fretwell, H. D. Pritchard, D. G. Vaughan, J. L. Bamber, N. E. Barrand, R. Bell, C. Bianchi, R. G. Bingham, D. D. Blankenship, G. Casassa, G. Catania, D. Callens, H. Conway, A. J. Cook, H. F. J. Corr, D. Damaske, V. Damm, F. Ferraccioli, R. Forsberg, S. Fujita, Y. Gim, P. Gogineni, J. A. Griggs, R. C. A. Hindmarsh, P. Holmlund, J. W. Holt, R. W. Jacobel, A. Jenkins, W. Jokat, T. Jordan, E. C. King, J. Kohler, W. Krabill, M. Riger-Kusk, K. A. Langley, G. Leitchenkov, C. Leuschen, B. P. Luyendyk, K. Matsuoka, J. Mouginot, F. O. Nitsche, Y. Nogi, O. A. Nost, S. V. Popov, E. Rignot, D. M. Rippin, A. Rivera, J. Roberts, N. Ross, M. J. Siegert, A. M. Smith, D. Steinhage, M. Studinger, B. Sun, B. K. Tinto, B. C. Welch, D. Wilson, D. A. Young, C. Xiangbin, and A. Zirizzotti
The Cryosphere, 7, 375–393, https://doi.org/10.5194/tc-7-375-2013, https://doi.org/10.5194/tc-7-375-2013, 2013
Related subject area
Discipline: Glaciers | Subject: Field Studies
Monitoring glacier calving using underwater sound
Brief communication: Measuring and modelling the ice thickness of the Grigoriev ice cap (Kyrgyzstan) and comparison with global datasets
Geophysical measurements of the southernmost microglacier in Europe suggest permafrost occurrence in the Pirin Mountains (Bulgaria)
Ground-penetrating radar imaging reveals glacier's drainage network in 3D
A portable lightweight in situ analysis (LISA) box for ice and snow analysis
On the Green's function emergence from interferometry of seismic wave fields generated in high-melt glaciers: implications for passive imaging and monitoring
Revisiting Austfonna, Svalbard, with potential field methods – a new characterization of the bed topography and its physical properties
Jarosław Tęgowski, Oskar Glowacki, Michał Ciepły, Małgorzata Błaszczyk, Jacek Jania, Mateusz Moskalik, Philippe Blondel, and Grant B. Deane
The Cryosphere, 17, 4447–4461, https://doi.org/10.5194/tc-17-4447-2023, https://doi.org/10.5194/tc-17-4447-2023, 2023
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Receding tidewater glaciers are important contributors to sea level rise. Understanding their dynamics and developing models for their attrition has become a matter of global concern. Long-term monitoring of glacier frontal ablation is very difficult. Here we show for the first time that calving fluxes can be estimated from the underwater sounds made by icebergs impacting the sea surface. This development has important application to understanding the response of glaciers to warming oceans.
Lander Van Tricht, Chloë Marie Paice, Oleg Rybak, and Philippe Huybrechts
The Cryosphere, 17, 4315–4323, https://doi.org/10.5194/tc-17-4315-2023, https://doi.org/10.5194/tc-17-4315-2023, 2023
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We performed a field campaign to measure the ice thickness of the Grigoriev ice cap (Central Asia). We interpolated the ice thickness data to obtain an ice thickness distribution representing the state of the ice cap in 2021, with a total volume of ca. 0.4 km3. We then compared our results with global ice thickness datasets composed without our local measurements. The main takeaway is that these datasets do not perform well enough yet for ice caps such as the Grigoriev ice cap.
Gergana Georgieva, Christian Tzankov, and Atanas Kisyov
The Cryosphere, 16, 4847–4863, https://doi.org/10.5194/tc-16-4847-2022, https://doi.org/10.5194/tc-16-4847-2022, 2022
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The southernmost microglacier in Europe is Snezhnika in the Pirin Mountains, Bulgaria. We use geophysical methods to investigate its thickness and the subsurface structure beneath it. While its size has been well monitored for more than 20 years, information about its thickness is poor. Our results show the presence of ice-rich permafrost near Snezhnika, which was observed in 3 consecutive years. Our results provide important information on the extent and the state of permafrost in Bulgaria.
Gregory Church, Andreas Bauder, Melchior Grab, and Hansruedi Maurer
The Cryosphere, 15, 3975–3988, https://doi.org/10.5194/tc-15-3975-2021, https://doi.org/10.5194/tc-15-3975-2021, 2021
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In this field study, we acquired a 3D radar survey over an active drainage network that transported meltwater through a Swiss glacier. We successfully imaged both englacial and subglacial pathways and were able to confirm long-standing glacier hydrology theory regarding meltwater pathways. The direction of these meltwater pathways directly impacts the glacier's velocity, and therefore more insightful field observations are needed in order to improve our understanding of this complex system.
Helle Astrid Kjær, Lisa Lolk Hauge, Marius Simonsen, Zurine Yoldi, Iben Koldtoft, Maria Hörhold, Johannes Freitag, Sepp Kipfstuhl, Anders Svensson, and Paul Vallelonga
The Cryosphere, 15, 3719–3730, https://doi.org/10.5194/tc-15-3719-2021, https://doi.org/10.5194/tc-15-3719-2021, 2021
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Ice core analyses are often done in home laboratories after costly transport of samples from the field. This limits the amount of sample that can be analysed.
Here, we present the first truly field-portable continuous flow analysis (CFA) system for the analysis of impurities in snow, firn and ice cores while still in the field: the lightweight in situ analysis (LISA) box.
LISA is demonstrated in Greenland to reconstruct accumulation, conductivity and peroxide in snow cores.
Amandine Sergeant, Małgorzata Chmiel, Fabian Lindner, Fabian Walter, Philippe Roux, Julien Chaput, Florent Gimbert, and Aurélien Mordret
The Cryosphere, 14, 1139–1171, https://doi.org/10.5194/tc-14-1139-2020, https://doi.org/10.5194/tc-14-1139-2020, 2020
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This study explores the capacity to apply ambient noise interferometry to passive seismic recordings in glaciers. Green's function between two seismometers represents the impulse response of the elastic medium. It can be approximated from cross-correlation of random seismic wave fields. For glaciers, its recovery is notoriously difficult due to weak ice seismic scattering. We propose three methods to bridge the gap and show the potential for passive seismic imaging and monitoring of glaciers.
Marie-Andrée Dumais and Marco Brönner
The Cryosphere, 14, 183–197, https://doi.org/10.5194/tc-14-183-2020, https://doi.org/10.5194/tc-14-183-2020, 2020
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The subglacial bed of Austfonna is investigated using potential field methods. Airborne gravity data provide a new bed topography, improving on the traditional ground-penetrating radar measurements. Combined with airborne magnetic data, a 2-D forward model reveals the heterogeneity of the subsurface lithology and the physical properties of the bed. Our approach also assesses the presence of softer bed, carbonates and magmatic intrusions under Austfonna, which contribute to subglacial processes.
Cited articles
Arthern, R. J., Winebrenner, D. P., and Vaughan, D. G.: Antarctic snow
accumulation mapped using polarization of 4.3 cm wavelength microwave
emission, J. Geophys. Res.-Atmos., 111, 1–10, https://doi.org/10.1029/2004JD005667,
2006.
Barrette, P. D. and Timco, G. W.: Laboratory study on the sliding resistance
of level ice and rubble on sand, Cold Reg. Sci. Technol., 54, 73–82,
https://doi.org/10.1016/j.coldregions.2008.02.002, 2008.
Benn, D. I., Wiseman, S., and Warren, C. R.: Rapid growth of a supraglacial
lake, Ngozumpa Glacier, Khumbu Himal, Nepal, IAHS-AISH P., 264, 177–185, 2000.
Benn, D. I., Wiseman, S., and Hands, K. A.: Growth and drainage of
supraglacial lakes on debrismantled Ngozumpa Glacier, Khumbu Himal, Nepal,
J. Glaciol., 47, 626–638, https://doi.org/10.3189/172756501781831729, 2001.
Benn, D. I., Kirkbride, M., Owen, L. A., and Brazier, V.: Glaciated Valley
Landsystems, in: Glacial Landsystems, edited by: Evans, D. J. A., Arnold, London, 2003.
Benn, D. I., Thompson, S., Gulley, J., Mertes, J., Luckman, A., and
Nicholson, L.: Structure and evolution of the drainage system of a Himalayan
debris-covered glacier, and its relationship with patterns of mass loss, The
Cryosphere, 11, 2247–2264, https://doi.org/10.5194/tc-11-2247-2017, 2017.
Bhatt, B. C. and Nakamura, K.: Characteristics of Monsoon Rainfall around
the Himalayas Revealed by TRMM Precipitation Radar, Mon. Weather Rev.,
133, 149–165, https://doi.org/10.1175/MWR-2846.1, 2005.
Bolch, T., Buchroithner, M., Pieczonka, T., and Kunert, A.: Planimetric and
volumetric glacier changes in the Khumbu Himal, Nepal, since 1962 using
Corona, Landsat TM and ASTER data, J. Glaciol., 54, 592–600,
https://doi.org/10.3189/002214308786570782, 2008.
Buri, P. and Pellicciotti, F.: Aspect controls the survival of ice cliffs on
debris-covered glaciers, P. Natl. Acad. Sci. USA, 115, 201713892,
https://doi.org/10.1073/pnas.1713892115, 2018.
Buri, P., Pellicciotti, F., Steiner, J. F., Miles, E. S., and Immerzeel, W.
W.: A grid-based model of backwasting of supraglacial ice cliffs on
debris-covered glaciers, Ann. Glaciol., 57, 199–211,
https://doi.org/10.3189/2016AoG71A059, 2016.
Conway, H. and Rasmussen, L. A.: Summer temperature profiles within
supraglacial debris on Khumbu Glacier, Nepal, IAHS-AISH P., 264, 89–97, 2000.
del Gobbo, C.: Debris thickness investigation of Solda glacier, southern
Rhaetian Alps, Italy: Methodological considerations about the use of ground
penetrating radar over a debris-covered glacier, MSc Thesis, University of
Innsbruck, 2017.
Evatt, G. W., Abrahams, I. D., Heil, M., Mayer, C., Kingslake, J., Mitchell,
S. L., Fowler, A. C., and Clark, C. D.: Glacial melt under a porous debris
layer, J. Glaciol., 61, 825–836, https://doi.org/10.3189/2015JoG14J235, 2015.
Fetter, C.: Applied Hydrogeology, Macmillan, 1994.
Fawcett, T.: An introduction to ROC analysis, Pattern Recognit. Lett.,
27, 861–874, https://doi.org/10.1016/j.patrec.2005.10.010, 2006.
Finsterwalder, S. and lagally, M.: Die Nuevermessung des Suldenferers 1906
und dessen Veränderungen in den letzten Jahrzehnten, Zeitschrift für
Gletscherkunde, 13, 1–7, 1913.
Foster, L. A., Brock, B. W., Cutler, M. E. J., and Diotri, F.: A physically
based method for estimating supraglacial debris thickness from thermal band
remote-sensing data, J. Glaciol., 58, 677–691,
https://doi.org/10.3189/2012JoG11J194, 2012.
Gibson, M. J., Glasser, N. F., Quincey, D. J., Mayer, C., Rowan, A. V., and
Irvine-Fynn, T. D. L.: Temporal variations in supraglacial debris
distribution on Baltoro Glacier, Karakoram between 2001 and 2012,
Geomorphology, 295, 572–585, https://doi.org/10.1016/j.geomorph.2017.08.012, 2017.
Heimsath, A. M., Dietrichs, W. E., Nishiizuml, K., and Finkel, R. C.: The
soil production function and landscape equilibrium, Nature, 388,
358–361, https://doi.org/10.1038/41056, 1997.
Heimsath, A. M., DiBiase, R. A., and Whipple, K. X.: Soil production limits
and the transition to bedrock-dominated landscapes, Nat. Geosci., 5,
210–214, doi:10.1038/ngeo1380, 2012.
Herreid, S. and Pellicciotti, F.: Automated detection of ice cliffs within
supraglacial debris cover, The Cryosphere, 12, 1811–1829,
https://doi.org/10.5194/tc-12-1811-2018, 2018.
Hirschmüller, H.: Stereo processing by semiglobal matching and mutual
information, IEEE Transaction on Pattern Analysis and Machine Intelligence,
30, 328–341, 2008.
Hock, R. and Noetzli, C.: Area melt and discharge modelling of
Storglaciären, Sweden, Ann. Glaciol., 24, 211–216,
https://doi.org/10.1017/S0260305500012192, 1997.
Juen, M., Mayer, C., Lambrecht, A., Han, H., and Liu, S.: Impact of varying
debris cover thickness on ablation: a case study for Koxkar Glacier in the
Tien Shan, The Cryosphere, 8, 377–386, https://doi.org/10.5194/tc-8-377-2014,
2014.
Kayastha, R. B., Takeuchi, Y., Nakawo, M., and Ageta, Y.: Practical
prediction of ice melting beneath various thickness of debris cover on
Khumbu Glacier, Nepal, using a positive degree-day factor, IAHS-AISH P., 264, 71–81, 2000.
Kääb, A., Berthier, E., Nuth, C., Gardelle, J., Arnaud, Y., Kaab, A.,
Berthier, E., Nuth, C., Gardelle, J., and Arnaud, Y.: Contrasting patterns of
early twenty-first-century glacier mass change in the Himalayas, Nature, 488,
495–498, https://doi.org/10.1038/nature11324, 2012.
Kirkbride, M. P.: Ice-marginal geomorphology and Holocene expansion of
debris-covered Tasman Glacier, New Zealand, IAHS-AISH P., 264, 211–217,
2000.
Kraaijenbrink, P. D. A., Bierkens, M. F. P., Lutz, A. F., and Immerzeel, W.
W.: Impact of a global temperature rise of 1.5 degrees Celsius on Asia's
glaciers, Nature, 549, 257–260, https://doi.org/10.1038/nature23878, 2017.
Kurosaki, Y. and Kimura, F.: Relationship between Topography and Daytime
Cloud Activity around Tibetan Plateau., J. Meteorol. Soc. Japan, 80,
1339–1355, https://doi.org/10.2151/jmsj.80.1339, 2002.
Lawson, D.: Semdimentological Analysis of the Western Terminus Region of the
Matanuska Glacier, Alaska, Cold Regions Research and Engineering Lab:
Hanover, NH, 1979.
Loomis, S. R.: Morphology and ablation processes on glacier ice, Proceedings
of the Association of American Geographers, 12, 88–92, 1970.
Mattson, L. E., Gardner, J. S. and Young, G. J.: Ablation on debris covered
glaciers: an example from the Rakhiot Glacier, Punjab, Himalaya, in:
IAHS-AISH P., edited by: Young, G. J., Wallingford, 218, 289–296, 1993.
McCarthy, M., Pritchard, H. D., Willis, I., and King, E.: Ground-penetrating
radar measurements of debris thickness on Lirung Glacier, Nepal, J.
Glaciol., 63, 534–555, https://doi.org/10.1017/jog.2017.18, 2017.
Mertes, J. R., Thompson, S. S., Booth, A. D., Gulley, J. D., and Benn, D. I.:
A conceptual model of supra-glacial lake formation on debris-covered glaciers
based on GPR facies analysis, Earth Surf. Process. Landforms, 42, 903–914,
https://doi.org/10.1002/esp.4068, 2016.
Mertes, J. R., Thompson, S. S., Booth, A. D., Gulley, J. D., and Benn, D. I.:
A conceptual model of supra-glacial lake formation on debris-covered
glaciers based on GPR facies analysis, Earth Surf. Proc. Land.,
42, 903–914, https://doi.org/10.1002/esp.4068, 2017.
Mihalcea, C., Mayer, C., Diolaiuti, G., Lambrecht, A., Smiraglia, C., and
Tartari, G.: Ice ablation and meteorological conditions on the
debris-covered area of Baltoro glacier, Karakoram, Pakistan, Ann. Glaciol.,
43, 292–300, 2006.
Mihalcea, C., Brock, B. W., Diolaiuti, G., D'Agata, C., Citterio, M.,
Kirkbride, M. P., Cutler, M. E. J., and Smiraglia, C.: Using ASTER satellite
and ground-based surface temperature measurements to derive supraglacial
debris cover and thickness patterns on Miage Glacier (Mont Blanc Massif,
Italy), Cold Reg. Sci. Technol., 52, 341–354, 2008a.
Mihalcea, C., Mayer, C., and Diolaiuti, G.: Spatial distribution of debris
thickness and melting from remote-sensing and meteorological data, at
debris-covered Baltoro glacier, Karakoram, Pakistan, Ann. Glaciol., 48,
49–57, 2008b.
Miles, E. S., Pellicciotti, F., Willis, I. C., Steiner, J. F., Buri, P., and
Arnold, N. S.: Refined energy-balance modelling of a supraglacial pond,
Langtang Khola, Nepal, Ann. Glaciol., 57, 29–40,
https://doi.org/10.3189/2016AoG71A421, 2016.
Miles, K. E., Hubbard, B., Irvine-Fynn, T. D. L., Miles, E. S., Quincey, D.
J., and Rowan, A. V.: Review article: The hydrology of debris-covered
glaciers – state of the science and future research directions, The
Cryosphere Discuss., https://doi.org/10.5194/tc-2017-210, 2017.
Moore, P. L.: Stability of supraglacial debris, Earth Surf. Process.
Landforms, 43, 285–297, https://doi.org/10.1002/esp.4244, 2018.
Nicholson, L. I. and Benn, D. I.: Calculating ice melt beneath a debris
layer using meteorological data, J. Glaciol., 52, 463–470, 2006.
Nicholson, L. I. and Benn, D. I.: Properties of natural supraglacial debris
in relation to modelling sub-debris ice ablation, Earth Surf. Proc. Land., 38, 409–501, https://doi.org/10.1002/esp.3299, 2012.
Nicholson, L. and McCarthy, M.: Supraglacial debris thickness data from
Ngozumpa Glacier, Nepal, https://doi.org/10.5281/zenodo.1451560, 2018.
Nicholson, L. and Mertes, J.: Thickness estimation of supraglacial debris
above ice cliff exposures using a high-resolution digital surface model
derived from terrestrial photography, J. Glaciol., 63, 989–998,
https://doi.org/10.1017/jog.2017.68, 2017.
Nuimura, T., Fujita, K., Yamaguchi, S., and Sharma, R. R.: Elevation changes
of glaciers revealed by multitemporal digital elevation models calibrated by
GPS survey in the Khumbu region, Nepal Himalaya, 1992–2008, J. Glaciol.,
58, 648–656, https://doi.org/10.3189/2012JoG11J061, 2012.
Østrem, G.: Ice melting under a thin layer of moraine, and the existence
of ice cores in moraine ridges, Geografiska Ann., 51, 228–230, 1959.
Pelletier, J. D. and Rasmussen, C.: Geomorphically based predictive mapping
of soil thickness in upland watersheds, Water Resour. Res., 45, 1–15,
https://doi.org/10.1029/2008WR007319, 2009.
Quincey, D. J., Luckman, A., and Benn, D. I.: Quantification of Everest
region glacier velocities between 1992 and 2002, using satellite radar
interferometry and feature tracking, J. Glaciol., 55, 596–606,
https://doi.org/10.3189/002214309789470987, 2009.
Reid, T. D. and Brock, B. W.: An energy-balance model for debris-covered
glaciers including heat conduction through the debris layer, J. Glaciol.,
56, 903–916, 2010.
Reid, T. D., Carenzo, M., Pellicciotti, F., and Brock, B. W.: Including
debris cover effects in a distributed model of glacier ablation, J. Geophys.
Res., 117, 1–15, https://doi.org/10.1029/2012JD017795, 2012.
Rieg, L., Klug, C., Nicholson, L., and Sailer, R.: Pléiades Tri-Stereo
Data for Glacier Investigations – Examples from the European Alps and the
Khumbu Himal, Remote Sens., 10, 1563, https://doi.org/10.3390/rs10101563, 2018.
Rounce, D. R. and McKinney, D. C.: Debris thickness of glaciers in the
Everest area (Nepal Himalaya) derived from satellite imagery using a
nonlinear energy balance model, The Cryosphere, 8, 1317–1329,
https://doi.org/10.5194/tc-8-1317-2014, 2014.
Rowan, A. V.: The “Little Ice Age” in the Himalaya: A review of glacier
advance driven by Northern Hemisphere temperature change, Holocene, 27,
292–308, https://doi.org/10.1177/0959683616658530, 2017.
Sakai, A., Takeuchi, N., Fujita, K., and Nakawo, M.: Role of supraglacial
ponds in the ablation process of a debris-covered glacier in the Nepal
Himalayas, IAHS-AISH P., 265, 119–132, 2000.
Schauwecker, S., Rohrer, M., Huggel, C., Kulkarni, A., Ramanathan, A. L.,
Salzmann, N., Stoffel, M., and Brock, B. W.: Remotely sensed debris thickness
mapping of Bara Shigri Glacier, Indian Himalaya, J. Glaciol., 61,
675–688, https://doi.org/10.3189/2015JoG14J102, 2015.
Shea, J. M., Wagnon, P., Immerzeel, W. W., Biron, R., Brun, F., and
Pellicciotti, F.: A comparative high-altitude meteorological analysis from
three catchments in the Nepalese Himalaya, Int. J. Water Resour. Dev., 31,
1–27, https://doi.org/10.1080/07900627.2015.1020417, 2015.
Thompson, S. S., Benn, D. I., Dennis, K., and Luckman, A.: A rapidly growing
moraine-dammed glacial lake on Ngozumpa Glacier, Nepal, Geomorphology,
145–146, 1–11, https://doi.org/10.1016/j.geomorph.2011.08.015, 2012.
Thompson, S. S., Benn, D. I., Mertes, J., and Luckman, A.: Stagnation and
mass loss on a Himalayan debris-covered glacier: Processes, patterns and
rates, J. Glaciol., 62, 467–485, https://doi.org/10.1017/jog.2016.37, 2016.
Wagnon, P., Vincent, C., Arnaud, Y., Berthier, E., Vuillermoz, E., Gruber,
S., Ménégoz, M., Gilbert, A., Dumont, M., Shea, J. M., Stumm, D., and
Pokhrel, B. K.: Seasonal and annual mass balances of Mera and Pokalde
glaciers (Nepal Himalaya) since 2007, The Cryosphere, 7, 1769–1786,
https://doi.org/10.5194/tc-7-1769-2013, 2013.
Watson, C. S., Quincey, D. J., Carrivick, J. L., and Smith, M. W.: The
dynamics of supraglacial ponds in the Everest region, central Himalaya, Glob.
Planet. Change, 142, 14–27, , 2016.
Zhang, Y., Fujita, K., Liu, S., Liu, Q., and Nuimura, T.: Distribution of
debris thickness and its effect on ice melt at Hailuogou glacier,
southeastern Tibetan Plateau, using in situ surveys and ASTER imagery, J.
Glaciol., 57, 1147–1157, https://doi.org/10.3189/002214311798843331, 2011.
Short summary
Ground-penetrating radar of supraglacial debris thickness is used to study local thickness variability. Freshly emergent debris cover appears to have higher skewness and kurtosis than more mature debris covers. Accounting for debris thickness variability in ablation models can result in markedly different ice ablation than is calculated using the mean debris thickness. Slope stability modelling reveals likely locations for locally thin debris with high ablation.
Ground-penetrating radar of supraglacial debris thickness is used to study local thickness...