Articles | Volume 16, issue 11
https://doi.org/10.5194/tc-16-4701-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-16-4701-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
11 Nov 2022
Research article |
| 11 Nov 2022
| 11 Nov 2022
Sub-seasonal variability of supraglacial ice cliff melt rates and associated processes from time-lapse photogrammetry
High Mountain Glaciers and Hydrology Group, Swiss Federal Institute,
WSL, Birmensdorf, 8903, Switzerland
Institute of Environmental Engineering, ETH Zürich, Zurich,
8092, Switzerland
Evan S. Miles
High Mountain Glaciers and Hydrology Group, Swiss Federal Institute,
WSL, Birmensdorf, 8903, Switzerland
Pascal Buri
High Mountain Glaciers and Hydrology Group, Swiss Federal Institute,
WSL, Birmensdorf, 8903, Switzerland
Stefan Fugger
High Mountain Glaciers and Hydrology Group, Swiss Federal Institute,
WSL, Birmensdorf, 8903, Switzerland
Institute of Environmental Engineering, ETH Zürich, Zurich,
8092, Switzerland
Michael McCarthy
High Mountain Glaciers and Hydrology Group, Swiss Federal Institute,
WSL, Birmensdorf, 8903, Switzerland
Thomas E. Shaw
High Mountain Glaciers and Hydrology Group, Swiss Federal Institute,
WSL, Birmensdorf, 8903, Switzerland
Zhao Chuanxi
Key Laboratory of Tibetan Environment Changes and Land Surface
Processes, Institute of Tibetan Plateau Research, Chinese Academy of
Sciences, Beijing, 100045, China
Martin Truffer
Geophysical Institute, University of Alaska
Fairbanks, Fairbanks, AK 99775, USA
Matthew J. Westoby
Department of Geography and Environmental Sciences, Northumbria
University, Newcastle upon Tyne, NE1 8ST, UK
Wei Yang
Key Laboratory of Tibetan Environment Changes and Land Surface
Processes, Institute of Tibetan Plateau Research, Chinese Academy of
Sciences, Beijing, 100045, China
Francesca Pellicciotti
High Mountain Glaciers and Hydrology Group, Swiss Federal Institute,
WSL, Birmensdorf, 8903, Switzerland
Department of Geography and Environmental Sciences, Northumbria
University, Newcastle upon Tyne, NE1 8ST, UK
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Yanbin Lei, Tandong Yao, Lide Tian, Yongwei Sheng, Lazhu, Jingjuan Liao, Huabiao Zhao, Wei Yang, Kun Yang, Etienne Berthier, Fanny Brun, Yang Gao, Meilin Zhu, and Guangjian Wu
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Álvaro Ayala, David Farías-Barahona, Matthias Huss, Francesca Pellicciotti, James McPhee, and Daniel Farinotti
The Cryosphere, 14, 2005–2027, https://doi.org/10.5194/tc-14-2005-2020, https://doi.org/10.5194/tc-14-2005-2020, 2020
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The Cryosphere Discuss., https://doi.org/10.5194/tc-2019-178, https://doi.org/10.5194/tc-2019-178, 2019
Preprint withdrawn
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Thick rock cover (or debris) disturbs the melt of many Alaskan glaciers. Yet the effect of debris on glacier thinning in Alaska has been overlooked. In three companion papers we assess the role of debris and ice flow on the thinning of Kennicott Glacier. In Part C we describe feedbacks contributing to rapid thinning under thick debris. Changes in debris thickness downglacier on Kennicott Glacier are manifested in the pattern of glacier thinning, ice dynamics, melt, and glacier surface features.
Leif S. Anderson, Robert S. Anderson, Pascal Buri, and William H. Armstrong
The Cryosphere Discuss., https://doi.org/10.5194/tc-2019-174, https://doi.org/10.5194/tc-2019-174, 2019
Preprint withdrawn
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Thick rock cover (or debris) disturbs the melt of many Alaskan glaciers. Yet the effect of debris on glacier thinning in Alaska has been overlooked. In three companion papers we assess the role of debris and ice flow on the thinning of Kennicott Glacier. In Part A, we report measurements from the glacier surface. We measured surface debris thickness, melt under debris, and the rate of ice cliff backwasting. These data allow for further studies linking debris to glacier shrinkage in Alaska.
Teun van Woerkom, Jakob F. Steiner, Philip D. A. Kraaijenbrink, Evan S. Miles, and Walter W. Immerzeel
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Using data obtained from multiple UAV flights over a debris-covered glacier in the Himalaya between 2013 and 2018, we show that the adjacent moraines erode at rates of up to 16 cm per year, contributing to this debris cover. With retreating ice and resulting instability of moraines, this causes the glacier to cover a narrow zone along the lateral moraines in ever-thicker layers of rocks, resulting in a possible future decrease of local melt.
Evan S. Miles, C. Scott Watson, Fanny Brun, Etienne Berthier, Michel Esteves, Duncan J. Quincey, Katie E. Miles, Bryn Hubbard, and Patrick Wagnon
The Cryosphere, 12, 3891–3905, https://doi.org/10.5194/tc-12-3891-2018, https://doi.org/10.5194/tc-12-3891-2018, 2018
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We use high-resolution satellite imagery and field visits to assess the growth and drainage of a lake on Changri Shar Glacier in the Everest region, and its impact. The lake filled and drained within 3 months, which is a shorter interval than would be detected by standard monitoring protocols, but forced re-routing of major trails in several locations. The water appears to have flowed beneath Changri Shar and Khumbu glaciers in an efficient manner, suggesting pre-existing developed flow paths.
Sam Herreid and Francesca Pellicciotti
The Cryosphere, 12, 1811–1829, https://doi.org/10.5194/tc-12-1811-2018, https://doi.org/10.5194/tc-12-1811-2018, 2018
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Ice cliffs are steep, bare ice features that can develop on the lower reaches of a glacier where the surface is covered by a layer of rock debris. Debris cover generally slows the rate of glacier melt, but ice cliffs act as small windows of higher rates of melt. It is therefore important to map these features, a process which we have automated. On a global scale, ice cliffs have variable geometries and characteristics. The method we have developed can accommodate this variability automatically.
Katie E. Miles, Bryn Hubbard, Tristam D. L. Irvine-Fynn, Evan S. Miles, Duncan J. Quincey, and Ann V. Rowan
The Cryosphere Discuss., https://doi.org/10.5194/tc-2017-210, https://doi.org/10.5194/tc-2017-210, 2017
Preprint withdrawn
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The production and routing of meltwater through glaciers is important because that water influences glacier sliding, and represents a resource in some instances and a hazard in others. Despite this importance, very little is known about the hydrology of debris-covered glaciers, which are commonly located at high altitudes. Here, we present a review of the hydrology of debris-covered glaciers, summarizing the current state of knowledge and identify potential future research priorities.
Matthew J. Westoby, Stuart A. Dunning, John Woodward, Andrew S. Hein, Shasta M. Marrero, Kate Winter, and David E. Sugden
Earth Surf. Dynam., 4, 515–529, https://doi.org/10.5194/esurf-4-515-2016, https://doi.org/10.5194/esurf-4-515-2016, 2016
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We quantify the surface evolution of an Antarctic blue-ice moraine complex over 1- and 12-month intervals using repeat terrestrial laser scanning and structure-from-motion photogrammetry. We find net uplift and lateral movement of moraines within a field season (mean uplift ~ 0.10 m) and local surface lowering of a similar magnitude. Net uplift across the site between seasons was 0.07 m. Such data offer new opportunities to understand linkages between surface ablation, ice flow and debris supply within moraines.
M. J. Westoby, J. Brasington, N. F. Glasser, M. J. Hambrey, J. M. Reynolds, M. A. A. M. Hassan, and A. Lowe
Earth Surf. Dynam., 3, 171–199, https://doi.org/10.5194/esurf-3-171-2015, https://doi.org/10.5194/esurf-3-171-2015, 2015
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Understanding monsoon controls on the energy and mass balance of glaciers in the Central and Eastern Himalaya
SNICAR-ADv4: a physically based radiative transfer model to represent the spectral albedo of glacier ice
Firn changes at Colle Gnifetti revealed with a high-resolution process-based physical model approach
Seasonal and interannual variability of melt-season albedo at Haig Glacier, Canadian Rocky Mountains
Surface energy fluxes on Chilean glaciers: measurements and models
Using 3D turbulence-resolving simulations to understand the impact of surface properties on the energy balance of a debris-covered glacier
Incorporating moisture content in surface energy balance modeling of a debris-covered glacier
Surface melt and the importance of water flow – an analysis based on high-resolution unmanned aerial vehicle (UAV) data for an Arctic glacier
Glacio-hydrological melt and run-off modelling: application of a limits of acceptability framework for model comparison and selection
Navaraj Pokhrel, Patrick Wagnon, Fanny Brun, Arbindra Khadka, Tom Matthews, Audrey Goutard, Dibas Shrestha, Baker Perry, and Marion Réveillet
EGUsphere, https://doi.org/10.5194/egusphere-2024-1760, https://doi.org/10.5194/egusphere-2024-1760, 2024
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We studied snow processes in the accumulation area of Mera Glacier (Central Himalaya, Nepal) by deploying a cosmic ray counting sensor that allows to track the evolution of the snow water equivalent. We suspect significant surface melting, water percolation and refreezing within the snowpack, that might be missed by traditional mass balance surveys.
Dominik Amschwand, Martin Scherler, Martin Hoelzle, Bernhard Krummenacher, Anna Haberkorn, Christian Kienholz, and Hansueli Gubler
The Cryosphere, 18, 2103–2139, https://doi.org/10.5194/tc-18-2103-2024, https://doi.org/10.5194/tc-18-2103-2024, 2024
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Rock glaciers are coarse-debris permafrost landforms that are comparatively climate resilient. We estimate the surface energy balance of rock glacier Murtèl (Swiss Alps) based on a large surface and sub-surface sensor array. During the thaw seasons 2021 and 2022, 90 % of the net radiation was exported via turbulent heat fluxes and only 10 % was transmitted towards the ground ice table. However, early snowmelt and droughts make these permafrost landforms vulnerable to climate warming.
Christina Draeger, Valentina Radić, Rachel H. White, and Mekdes Ayalew Tessema
The Cryosphere, 18, 17–42, https://doi.org/10.5194/tc-18-17-2024, https://doi.org/10.5194/tc-18-17-2024, 2024
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Our study increases our confidence in using reanalysis data for reconstructions of past glacier melt and in using dynamical downscaling for long-term simulations from global climate models to project glacier melt. We find that the surface energy balance model, forced with reanalysis and dynamically downscaled reanalysis data, yields <10 % difference in the modeled total melt energy when compared to the same model being forced with observations at our glacier sites in western Canada.
Andri Gunnarsson, Sigurdur M. Gardarsson, and Finnur Pálsson
The Cryosphere, 17, 3955–3986, https://doi.org/10.5194/tc-17-3955-2023, https://doi.org/10.5194/tc-17-3955-2023, 2023
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A model was developed with the possibility of utilizing satellite-derived daily surface albedo driven by high-resolution climate data to estimate the surface energy balance (SEB) for all Icelandic glaciers for the period 2000–2021.
Franziska Temme, David Farías-Barahona, Thorsten Seehaus, Ricardo Jaña, Jorge Arigony-Neto, Inti Gonzalez, Anselm Arndt, Tobias Sauter, Christoph Schneider, and Johannes J. Fürst
The Cryosphere, 17, 2343–2365, https://doi.org/10.5194/tc-17-2343-2023, https://doi.org/10.5194/tc-17-2343-2023, 2023
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Calibration of surface mass balance (SMB) models on regional scales is challenging. We investigate different calibration strategies with the goal of achieving realistic simulations of the SMB in the Monte Sarmiento Massif, Tierra del Fuego. Our results show that the use of regional observations from satellite data can improve the model performance. Furthermore, we compare four melt models of different complexity to understand the benefit of increasing the processes considered in the model.
Marlene Kronenberg, Ward van Pelt, Horst Machguth, Joel Fiddes, Martin Hoelzle, and Felix Pertziger
The Cryosphere, 16, 5001–5022, https://doi.org/10.5194/tc-16-5001-2022, https://doi.org/10.5194/tc-16-5001-2022, 2022
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The Pamir Alay is located at the edge of regions with anomalous glacier mass changes. Unique long-term in situ data are available for Abramov Glacier, located in the Pamir Alay. In this study, we use this extraordinary data set in combination with reanalysis data and a coupled surface energy balance–multilayer subsurface model to compute and analyse the distributed climatic mass balance and firn evolution from 1968 to 2020.
Marte G. Hofsteenge, Nicolas J. Cullen, Carleen H. Reijmer, Michiel van den Broeke, Marwan Katurji, and John F. Orwin
The Cryosphere, 16, 5041–5059, https://doi.org/10.5194/tc-16-5041-2022, https://doi.org/10.5194/tc-16-5041-2022, 2022
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In the McMurdo Dry Valleys (MDV), foehn winds can impact glacial meltwater production and the fragile ecosystem that depends on it. We study these dry and warm winds at Joyce Glacier and show they are caused by a different mechanism than that found for nearby valleys, demonstrating the complex interaction of large-scale winds with the mountains in the MDV. We find that foehn winds increase sublimation of ice, increase heating from the atmosphere, and increase the occurrence and rates of melt.
Jonathan P. Conway, Jakob Abermann, Liss M. Andreassen, Mohd Farooq Azam, Nicolas J. Cullen, Noel Fitzpatrick, Rianne H. Giesen, Kirsty Langley, Shelley MacDonell, Thomas Mölg, Valentina Radić, Carleen H. Reijmer, and Jean-Emmanuel Sicart
The Cryosphere, 16, 3331–3356, https://doi.org/10.5194/tc-16-3331-2022, https://doi.org/10.5194/tc-16-3331-2022, 2022
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We used data from automatic weather stations on 16 glaciers to show how clouds influence glacier melt in different climates around the world. We found surface melt was always more frequent when it was cloudy but was not universally faster or slower than under clear-sky conditions. Also, air temperature was related to clouds in opposite ways in different climates – warmer with clouds in cold climates and vice versa. These results will help us improve how we model past and future glacier melt.
Christophe Kinnard, Olivier Larouche, Michael N. Demuth, and Brian Menounos
The Cryosphere, 16, 3071–3099, https://doi.org/10.5194/tc-16-3071-2022, https://doi.org/10.5194/tc-16-3071-2022, 2022
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This study implements a physically based, distributed glacier mass balance model in a context of sparse direct observations. Carefully constraining model parameters with ancillary data allowed for accurately reconstructing the mass balance of Saskatchewan Glacier over a 37-year period. We show that the mass balance sensitivity to warming is dominated by increased melting and that changes in glacier albedo and air humidity are the leading causes of increased glacier melt under warming scenarios.
Stefan Fugger, Catriona L. Fyffe, Simone Fatichi, Evan Miles, Michael McCarthy, Thomas E. Shaw, Baohong Ding, Wei Yang, Patrick Wagnon, Walter Immerzeel, Qiao Liu, and Francesca Pellicciotti
The Cryosphere, 16, 1631–1652, https://doi.org/10.5194/tc-16-1631-2022, https://doi.org/10.5194/tc-16-1631-2022, 2022
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The monsoon is important for the shrinking and growing of glaciers in the Himalaya during summer. We calculate the melt of seven glaciers in the region using a complex glacier melt model and weather data. We find that monsoonal weather affects glaciers that are covered with a layer of rocky debris and glaciers without such a layer in different ways. It is important to take so-called turbulent fluxes into account. This knowledge is vital for predicting the future of the Himalayan glaciers.
Chloe A. Whicker, Mark G. Flanner, Cheng Dang, Charles S. Zender, Joseph M. Cook, and Alex S. Gardner
The Cryosphere, 16, 1197–1220, https://doi.org/10.5194/tc-16-1197-2022, https://doi.org/10.5194/tc-16-1197-2022, 2022
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Snow and ice surfaces are important to the global climate. Current climate models use measurements to determine the reflectivity of ice. This model uses physical properties to determine the reflectivity of snow, ice, and darkly pigmented impurities that reside within the snow and ice. Therefore, the modeled reflectivity is more accurate for snow/ice columns under varying climate conditions. This model paves the way for improvements in the portrayal of snow and ice within global climate models.
Enrico Mattea, Horst Machguth, Marlene Kronenberg, Ward van Pelt, Manuela Bassi, and Martin Hoelzle
The Cryosphere, 15, 3181–3205, https://doi.org/10.5194/tc-15-3181-2021, https://doi.org/10.5194/tc-15-3181-2021, 2021
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In our study we find that climate change is affecting the high-alpine Colle Gnifetti glacier (Swiss–Italian Alps) with an increase in melt amounts and ice temperatures.
In the near future this trend could threaten the viability of the oldest ice core record in the Alps.
To reach our conclusions, for the first time we used the meteorological data of the highest permanent weather station in Europe (Capanna Margherita, 4560 m), together with an advanced numeric simulation of the glacier.
Shawn J. Marshall and Kristina Miller
The Cryosphere, 14, 3249–3267, https://doi.org/10.5194/tc-14-3249-2020, https://doi.org/10.5194/tc-14-3249-2020, 2020
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Surface-albedo measurements from 2002 to 2017 from Haig Glacier in the Canadian Rockies provide no evidence of long-term trends (i.e., the glacier does not appear to be darkening), but there are large variations in albedo over the melt season and from year to year. The glacier ice is exceptionally dark in association with forest fire fallout but is effectively cleansed by meltwater or rainfall. Summer snowfall plays an important role in refreshing the glacier surface and reducing summer melt.
Marius Schaefer, Duilio Fonseca-Gallardo, David Farías-Barahona, and Gino Casassa
The Cryosphere, 14, 2545–2565, https://doi.org/10.5194/tc-14-2545-2020, https://doi.org/10.5194/tc-14-2545-2020, 2020
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Chile hosts glaciers in a large range of latitudes and climates. To project future ice extent, a sound quantification of the energy exchange between atmosphere and glaciers is needed. We present new data for six Chilean glaciers belonging to three glaciological zones. In the Central Andes, the main energy source for glacier melt is the incoming solar radiation, while in southern Patagonia heat provided by the mild and humid air is also important. Total melt rates are higher in Patagonia.
Pleun N. J. Bonekamp, Chiel C. van Heerwaarden, Jakob F. Steiner, and Walter W. Immerzeel
The Cryosphere, 14, 1611–1632, https://doi.org/10.5194/tc-14-1611-2020, https://doi.org/10.5194/tc-14-1611-2020, 2020
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Drivers controlling melt of debris-covered glaciers are largely unknown. With a 3D turbulence-resolving model the impact of surface properties of debris on micrometeorological variables and the conductive heat flux is shown. Also, we show ice cliffs are local melt hot spots and that turbulent fluxes and local heat advection amplify spatial heterogeneity on the surface.This work is important for glacier mass balance modelling and for the understanding of the evolution of debris-covered glaciers.
Alexandra Giese, Aaron Boone, Patrick Wagnon, and Robert Hawley
The Cryosphere, 14, 1555–1577, https://doi.org/10.5194/tc-14-1555-2020, https://doi.org/10.5194/tc-14-1555-2020, 2020
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Rocky debris on glacier surfaces is known to affect the melt of mountain glaciers. Debris can be dry or filled to varying extents with liquid water and ice; whether debris is dry, wet, and/or icy affects how efficiently heat is conducted through debris from its surface to the ice interface. Our paper presents a new energy balance model that simulates moisture phase, evolution, and location in debris. ISBA-DEB is applied to West Changri Nup glacier in Nepal to reveal important physical processes.
Eleanor A. Bash and Brian J. Moorman
The Cryosphere, 14, 549–563, https://doi.org/10.5194/tc-14-549-2020, https://doi.org/10.5194/tc-14-549-2020, 2020
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High-resolution measurements from unmanned aerial vehicle (UAV) imagery allowed for examination of glacier melt model performance in detail at Fountain Glacier. This work capitalized on distributed measurements at 10 cm resolution to look at the spatial distribution of model errors in the ablation zone. Although the model agreed with measurements on average, strong correlation was found with surface water. The results highlight the contribution of surface water flow to melt at this location.
Jonathan D. Mackay, Nicholas E. Barrand, David M. Hannah, Stefan Krause, Christopher R. Jackson, Jez Everest, and Guðfinna Aðalgeirsdóttir
The Cryosphere, 12, 2175–2210, https://doi.org/10.5194/tc-12-2175-2018, https://doi.org/10.5194/tc-12-2175-2018, 2018
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We apply a framework to compare and objectively accept or reject competing melt and run-off process models. We found no acceptable models. Furthermore, increasing model complexity does not guarantee better predictions. The results highlight model selection uncertainty and the need for rigorous frameworks to identify deficiencies in competing models. The application of this approach in the future will help to better quantify model prediction uncertainty and develop improved process models.
Cited articles
Anderson, L. S., Armstrong, W. H., Anderson, R. S., and Buri, P.: Debris cover and the thinning of Kennicott Glacier, Alaska: in situ measurements, automated ice cliff delineation and distributed melt estimates, The Cryosphere, 15, 265–282, https://doi.org/10.5194/tc-15-265-2021, 2021.
Armstrong, L., Lacelle, D., Fraser, R. H., Kokelj, S., and Knudby, A.: Thaw
slump activity measured using stationary cameras in time-lapse and
Structure-from-Motion photogrammetry, Antarct. Sci., 4, 827–845,
https://doi.org/10.1139/as-2018-0016, 2018.
Bartlett, O. T., Ng, F. S. L., and Rowan, A. V.: Morphology and evolution of
supraglacial hummocks on debris-covered Himalayan glaciers, Earth Surf.
Proc. Land., 46, esp.5043, https://doi.org/10.1002/esp.5043, 2020.
Beyer, R. A., Alexandrov, O., and McMichael, S.: The Ames Stereo Pipeline:
NASA's Open Source Software for Deriving and Processing Terrain Data, Earth
Sp. Sci., 5, 537–548, https://doi.org/10.1029/2018EA000409, 2018.
Bonekamp, P. N. J., van Heerwaarden, C. C., Steiner, J. F., and Immerzeel, W. W.: Using 3D turbulence-resolving simulations to understand the impact of surface properties on the energy balance of a debris-covered glacier, The Cryosphere, 14, 1611–1632, https://doi.org/10.5194/tc-14-1611-2020, 2020.
Brun, F., Buri, P., Miles, E. S., Wagnon, P., Steiner, J., Berthier, E.,
Ragettli, S., Kraaijenbrink, P., Immerzeel, W. W., and Pellicciotti, F.:
Quantifying volume loss from ice cliffs on debris-covered glaciers using
high-resolution terrestrial and aerial photogrammetry, J. Glaciol., 62, 684–695,
https://doi.org/10.1017/jog.2016.54, 2016.
Brun, F., Wagnon, P., Berthier, E., Shea, J. M., Immerzeel, W. W., Kraaijenbrink, P. D. A., Vincent, C., Reverchon, C., Shrestha, D., and Arnaud, Y.: Ice cliff contribution to the tongue-wide ablation of Changri Nup Glacier, Nepal, central Himalaya, The Cryosphere, 12, 3439–3457, https://doi.org/10.5194/tc-12-3439-2018, 2018.
Buri, P. and Pellicciotti, F.: Aspect controls the survival of ice cliffs on
debris-covered glaciers, P. Natl. Acad. Sci. USA, 115, 4369–4374,
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, 2016a.
Buri, P., Miles, E. S., Steiner, J. F., Immerzeel, W. W., Wagnon, P., and
Pellicciotti, F.: A physically based 3-D model of ice cliff evolution over
debris-covered glaciers, J. Geophys. Res.-Earth, 121, 2471–2493,
https://doi.org/10.1002/2016JF004039, 2016b.
Buri, P., Miles, E. S., Steiner, J. F., Ragettli, S., and Pellicciotti, F.:
Supraglacial Ice Cliffs Can Substantially Increase the Mass Loss of
Debris-Covered Glaciers, Geophys. Res. Lett., 48, e2020GL092150,
https://doi.org/10.1029/2020GL092150, 2021.
Corripio, J. G.: Snow surface albedo estimation using terrestrial
photography, Int. J. Remote Sens., 25, 5705–5729,
https://doi.org/10.1080/01431160410001709002, 2004.
Falaschi, D., Rivera, A., Lo Vecchio Repetto, A., Moragues, S., Villalba,
R., Rastner, P., Zeller, J., and Salcedo, A. P.: Evolution of Surface
Characteristics of Three Debris-Covered Glaciers in the Patagonian Andes
From 1958 to 2020, Front. Earth Sci., 9,
https://doi.org/10.3389/feart.2021.671854, 2021.
Farinotti, D., Huss, M., Fürst, J. J., Landmann, J., Machguth, H.,
Maussion, F., and Pandit, A.: A consensus estimate for the ice thickness
distribution of all glaciers on Earth, Nat. Geosci., 12, 168–173,
https://doi.org/10.1038/s41561-019-0300-3, 2019.
Ferguson, J. C. and Vieli, A.: Modelling steady states and the transient response of debris-covered glaciers, The Cryosphere, 15, 3377–3399, https://doi.org/10.5194/tc-15-3377-2021, 2021.
Filhol, S., Perret, A., Girod, L., Sutter, G., Schuler, T. V., and Burkhart,
J. F.: Time-Lapse Photogrammetry of Distributed Snow Depth During Snowmelt,
Water Resour. Res., 55, 7916–7926, https://doi.org/10.1029/2018WR024530,
2019.
Fugger, S., Fyffe, C. L., Fatichi, S., Miles, E., McCarthy, M., Shaw, T. E., Ding, B., Yang, W., Wagnon, P., Immerzeel, W., Liu, Q., and Pellicciotti, F.: Understanding monsoon controls on the energy and mass balance of glaciers in the Central and Eastern Himalaya, The Cryosphere, 16, 1631–1652, https://doi.org/10.5194/tc-16-1631-2022, 2022.
Fyffe, C. L., Woodget, A. S., Kirkbride, M. P., Deline, P., Westoby, M. J.,
and Brock, B. W.: Processes at the margins of supraglacial debris-cover:
Quantifying dirty ice ablation and debris redistribution, Earth Surf.
Proc. Land., 45, 2272–2290, https://doi.org/10.1002/esp.4879, 2020.
Gardelle, J., Berthier, E., Arnaud, Y., and Kääb, A.: Region-wide glacier mass balances over the Pamir-Karakoram-Himalaya during 1999–2011, The Cryosphere, 7, 1263–1286, https://doi.org/10.5194/tc-7-1263-2013, 2013.
GlaThiDa Consortium: Glacier Thickness Database 3.1.0, World Glacier Monitoring Service, Zurich, Switzerland [data set], https://doi.org/10.5904/wgms-glathida-2020-10, 2020.
Han, H., Wang, J., Wei, J., and Liu, S.: Backwasting rate on debris-covered
Koxkar glacier, Tuomuer mountain, China, J. Glaciol., 56, 287–296,
https://doi.org/10.3189/002214310791968430, 2010.
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.
Huss, M., Sugiyama, S., Bauder, A., and Funk, M.: Retreat Scenarios of
Unteraargletscher, Switzerland, Using a Combined Ice-Flow Mass-Balance
Model, Arct. Antarct. Alp. Res., 39, 422–431, 2007.
Immerzeel, W. W., Kraaijenbrink, P. D. A., Shea, J. M., Shrestha, A. B.,
Pellicciotti, F., Bierkens, M. F. P., and De Jong, S. M.: High-resolution
monitoring of Himalayan glacier dynamics using unmanned aerial vehicles,
Remote Sens. Environ., 150, 93–103,
https://doi.org/10.1016/j.rse.2014.04.025, 2014.
James, M. R. and Robson, S.: Mitigating systematic error in topographic
models derived from UAV and ground-based image networks, Earth Surf.
Proc. Land., 39, 1413–1420, https://doi.org/10.1002/esp.3609, 2014a.
James, M. R. and Robson, S.: Sequential digital elevation models of active
lava flows from ground-based stereo time-lapse imagery, ISPRS J. Photogramm., 97, 160–170, https://doi.org/10.1016/j.isprsjprs.2014.08.011,
2014b.
Jouberton, A., Shaw, T. E., Miles, E., McCarthy, M., Fugger, S., Ren, S., Dehecq, A., Yang, W., and Pellicciotti, F.: Warming-induced monsoon precipitation phase change intensifies glacier mass loss in the southeastern Tibetan Plateau, P. Natl. Acad. Sci. USA, 119, e2109796119, https://doi.org/10.1073/pnas.2109796119, 2022.
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.
King, O., Turner, A. G. D., Quincey, D. J., and Carrivick, J. L.:
Morphometric evolution of Everest region debris-covered glaciers, 371,
107422, https://doi.org/10.1016/j.geomorph.2020.107422, 2020.
Kneib, M., Miles, E. S., Jola, S., Buri, P., Herreid, S., Bhattacharya, A.,
Watson, C. S., Bolch, T., Quincey, D., and Pellicciotti, F.: Mapping ice
cliffs on debris-covered glaciers using multispectral satellite images,
Remote Sens. Environ., 253, 112201, https://doi.org/10.1016/j.rse.2020.112201,
2020.
Kneib, M., Miles, E. S., Buri, P., Molnar, P., McCarthy, M., Fugger, S., and
Pellicciotti, F.: Interannual Dynamics of Ice Cliff Populations on
Debris-Covered Glaciers from Remote Sensing Observations and Stochastic
Modeling, J. Geophys. Res.-Earth, 126, e2021JF006179,
https://doi.org/10.1029/2021JF006179, 2021.
Kneib, M., Miles, E. S., Buri, P., Fugger, S., McCarthy, M., Shaw, T. E., Chuanxi, Z., Truffer, M., Westoby, M. J., Yang, W., and Pellicciotti, F.: Data and scripts for “Sub-seasonal variability of supraglacial ice cliff melt rates and associated processes from time-lapse photogrammetry”, Zenodo [data set and code], https://doi.org/10.5281/zenodo.7044364, 2022.
Kraaijenbrink, P. D. A., Shea, J. M., Pellicciotti, F., De Jong, S. M., and
Immerzeel, W. W.: Object-based analysis of unmanned aerial vehicle imagery
to map and characterise surface features on a debris-covered glacier, Remote
Sens. Environ., 186, 581–595, https://doi.org/10.1016/j.rse.2016.09.013,
2016.
Lague, D., Brodu, N., and Leroux, J.:
Accurate 3D comparison of complex topography with terrestrial laser scanner: Application to the Rangitikei canyon (N-Z),
ISPRS J. Photogram. Remote Sens.,
82,
10–26, https://doi.org/10.1016/j.isprsjprs.2013.04.009,
2013.
Mallalieu, J., Carrivick, J. L., Quincey, D. J., Smith, M. W., and James, W.
H. M.: An integrated Structure-from-Motion and time-lapse technique for
quantifying ice-margin dynamics, J. Glaciol., 63, 937–949,
https://doi.org/10.1017/jog.2017.48, 2017.
McCarthy, M., Miles, E., Kneib, M., Buri, P., Fugger, S., and Pellicciotti, F.: Supraglacial debris thickness and supply rate in High-Mountain Asia, Commun. Earth Environ., 3, 269, https://doi.org/10.1038/s43247-022-00588-2, 2022.
Messerli, A. and Grinsted, A.: Image georectification and feature tracking toolbox: ImGRAFT, Geosci. Instrum. Method. Data Syst., 4, 23–34, https://doi.org/10.5194/gi-4-23-2015, 2015.
Miles, E., McCarthy, M., Dehecq, A., Kneib, M., Fugger, S., and
Pellicciotti, F.: Health and sustainability of glaciers in High Mountain
Asia, Nat. Commun., 121, 1–10,
https://doi.org/10.1038/s41467-021-23073-4, 2021.
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, E. S., Steiner, J. F., and Brun, F.: Highly variable aerodynamic
roughness length (z0) for a hummocky debris-covered glacier, J. Geophys.
Res.-Atmos., 122, 8447–8466, https://doi.org/10.1002/2017JD026510, 2017a.
Miles, E. S., Willis, I. C., Arnold, N. S., Steiner, J., and Pellicciotti,
F.: Spatial, seasonal and interannual variability of supraglacial ponds in
the Langtang Valley of Nepal, 1999–2013, J. Glaciol., 63, 88–105,
https://doi.org/10.1017/jog.2016.120, 2017b.
Miles, E. S., Willis, I., Buri, P., Steiner, J. F., Arnold, N. S., and
Pellicciotti, F.: Surface Pond Energy Absorption Across Four Himalayan
Glaciers Accounts for 1/8 of Total Catchment Ice Loss, Geophys. Res. Lett.,
45, 10464–10473, https://doi.org/10.1029/2018GL079678, 2018.
Mishra, N. B., Miles, E. S., Chaudhuri, G., Mainali, K. P., Mal, S., Singh,
P. B., and Tiruwa, B.: Quantifying heterogeneous monsoonal melt on a
debris-covered glacier in Nepal Himalaya using repeat uncrewed aerial system
(UAS) photogrammetry, J. Glaciol., 68, 288–304,
https://doi.org/10.1017/JOG.2021.96, 2021.
Mölg, N., Bolch, T., Walter, A., and Vieli, A.: Unravelling the evolution of Zmuttgletscher and its debris cover since the end of the Little Ice Age, The Cryosphere, 13, 1889–1909, https://doi.org/10.5194/tc-13-1889-2019, 2019.
Mölg, N., Ferguson, J., Bolch, T., and Vieli, A.: On the influence of
debris cover on glacier morphology: How high-relief structures evolve from
smooth surfaces, Geomorphology, 357, 107092,
https://doi.org/10.1016/j.geomorph.2020.107092, 2020.
Moore, P. L.: Stability of supraglacial debris, Earth Surf. Proc.
Land., 43, 285–297, https://doi.org/10.1002/esp.4244, 2018.
Moore, P. L.: Numerical Simulation of Supraglacial Debris Mobility:
Implications for Ablation and Landform Genesis, Front. Earth Sci., 9,
https://doi.org/10.3389/feart.2021.710131, 2021.
Nicholson, L. and Benn, D. I.: Calculating ice melt beneath a debris layer
using meteorological data, J. Glaciol., 52, 463–470,
https://doi.org/10.3189/172756506781828584, 2006.
Nicholson, L. I., McCarthy, M., Pritchard, H. D., and Willis, I.: Supraglacial debris thickness variability: impact on ablation and relation to terrain properties, The Cryosphere, 12, 3719–3734, https://doi.org/10.5194/tc-12-3719-2018, 2018.
Nuth, C. and Kääb, A.: Co-registration and bias corrections of satellite elevation data sets for quantifying glacier thickness change, The Cryosphere, 5, 271–290, https://doi.org/10.5194/tc-5-271-2011, 2011.
Ostrem, G.: Ice Melting under a Thin Layer of Moraine, and the Existence of
Ice Cores in Moraine Ridges, Geogr. Ann., 41, 228–230,
https://doi.org/10.1080/20014422.1959.11907953, 1959.
Pellicciotti, F., Stephan, C., Miles, E. S., Herreid, S., Immerzeel, W. W.,
and Bolch, T.: Mass-balance changes of the debris-covered glaciers in the
Langtang Himal, Nepal, from 1974 to 1999, J. Glaciol., 61, 373–386,
https://doi.org/10.3189/2015JoG13J237, 2015.
Pritchard, H. D., King, E. C., Goodger, D. J., McCarthy, M., Mayer, C., and
Kayastha, R.: Towards Bedmap Himalayas: development of an airborne
ice-sounding radar for glacier thickness surveys in High-Mountain Asia, Ann.
Glaciol., 61, 35–45, https://doi.org/10.1017/aog.2020.29, 2020.
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,
https://doi.org/10.3189/002214310794457218, 2010.
Reid, T. D. and Brock, B. W.: Assessing ice-cliff backwasting and its
contribution to total ablation of debris-covered Miage glacier, Mont Blanc
massif, Italy, J. Glaciol., 60, 3–13, https://doi.org/10.3189/2014JoG13J045, 2014.
Röhl, K.: Thermo-erosional notch development at fresh-water-calving
Tasman Glacier, New Zealand, J. Glaciol., 52, 203–213,
https://doi.org/10.3189/172756506781828773, 2006.
Sakai, A., Nakawo, M., and Fujita, K.: Melt rate of ice cliffs on the Lirung
Glacier, Nepal Himalayas, 1996, B. Glacier Res., 16, 57–66, 1998.
Sakai, A., Nakawo, M., and Fujita, K.: Distribution Characteristics and
Energy Balance of Ice Cliffs on Debris-covered Glaciers, Nepal Himalaya,
Arct. Antarct. Alp. Res., 34, 12–19,
https://doi.org/10.1080/15230430.2002.12003463, 2002.
Salerno, F., Thakuri, S., Tartari, G., Nuimura, T., Sunako, S., Sakai, A.,
and Fujita, K.: Debris-covered glacier anomaly? Morphological factors
controlling changes in the mass balance, surface area, terminus position,
and snow line altitude of Himalayan glaciers, Earth Planet. Sc. Lett., 471,
19–31, https://doi.org/10.1016/j.epsl.2017.04.039, 2017.
Sato, Y., Fujita, K., Inoue, H., Sunako, S., Sakai, A., Tsushima, A.,
Podolskiy, E. A., Kayastha, R., and Kayastha, R. B.: Ice Cliff Dynamics of
Debris-Covered Trakarding Glacier in the Rolwaling Region, Nepal Himalaya,
Front. Earth Sci., 9, 398, https://doi.org/10.3389/FEART.2021.623623/BIBTEX,
2021.
Shaw, T. E., Brock, B. W., Fyffe, C. L., Pellicciotti, F., Rutter, N., and
Diotri, F.: Air temperature distribution and energy-balance modelling of a
debris-covered glacier, J. Glaciol., 62, 185–198,
https://doi.org/10.1017/jog.2016.31, 2016.
Shean, D. E., Alexandrov, O., Moratto, Z. M., Smith, B. E., Joughin, I. R.,
Porter, C., and Morin, P.: An automated, open-source pipeline for mass
production of digital elevation models (DEMs) from very-high-resolution
commercial stereo satellite imagery, ISPRS J. Photogramm., 116,
101–117, https://doi.org/10.1016/j.isprsjprs.2016.03.012, 2016.
Stefaniak, A. M., Robson, B. A., Cook, S. J., Clutterbuck, B., Midgley, N.
G., and Labadz, J. C.: Mass balance and surface evolution of the
debris-covered Miage Glacier, 1990–2018, Geomorphology, 373, 107474,
https://doi.org/10.1016/j.geomorph.2020.107474, 2021.
Steiner, J. F., Pellicciotti, F., Buri, P., Miles, E. S., Immerzeel, W. W.,
and Reid, T. D.: Modelling ice-cliff backwasting on a debris-covered glacier
in the Nepalese Himalaya, J. Glaciol., 61, 889–907,
https://doi.org/10.3189/2015JoG14J194, 2015.
Steiner, J. F., Litt, M., Stigter, E. E., Shea, J., Bierkens, M. F. P., and
Immerzeel, W. W.: The Importance of Turbulent Fluxes in the Surface Energy
Balance of a Debris-Covered Glacier in the Himalayas, Front. Earth Sci., 6, ,
https://doi.org/10.3389/feart.2018.00144, 2018.
Steiner, J. F., Buri, P., Miles, E. S., Ragettli, S., and Pellicciotti, F.:
Supraglacial ice cliffs and ponds on debris-covered glaciers:
Spatio-temporal distribution and characteristics, J. Glaciol., 65, 617–632,
https://doi.org/10.1017/jog.2019.40, 2019.
Steiner, J. F., Gurung, T. R., Joshi, S. P., Koch, I., Saloranta, T., Shea,
J., Shrestha, A. B., Stigter, E., and Immerzeel, W. W.: Multi-year
observations of the high mountain water cycle in the Langtang catchment,
Central Himalaya, Hydrol. Process., 35, e14189, https://doi.org/10.1002/hyp.14189,
2021.
Tadono, T., Ishida, H., Oda, F., Naito, S., Minakawa, K., and Iwamoto, H.: Precise Global DEM Generation by ALOS PRISM, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-4, 71–76, https://doi.org/10.5194/isprsannals-II-4-71-2014, 2014.
Thompson, 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.
Vincent, C., Wagnon, P., Shea, J. M., Immerzeel, W. W., Kraaijenbrink, P., Shrestha, D., Soruco, A., Arnaud, Y., Brun, F., Berthier, E., and Sherpa, S. F.: Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal, The Cryosphere, 10, 1845–1858, https://doi.org/10.5194/tc-10-1845-2016, 2016.
Watson, C. S., Quincey, D. J., Carrivick, J. L., and Smith, M. W.: Ice cliff
dynamics in the Everest region of the Central Himalaya, Geomorphology, 278, 238–251,
https://doi.org/10.1016/j.geomorph.2016.11.017, 2017a.
Watson, C. S., Quincey, D. J., Smith, M. W., Carrivick, J. L., Rowan, A. V.,
and James, M. R.: Quantifying ice cliff evolution with multi-temporal point
clouds on the debris-covered Khumbu Glacier, Nepal, J. Glaciol., 63, 823-837,
https://doi.org/10.1017/jog.2017.47, 2017b.
Westoby, M. J., Brasington, J., Glasser, N. F., Hambrey, M. J., and
Reynolds, J. M.: “Structure-from-Motion” photogrammetry: A low-cost,
effective tool for geoscience applications, Geomorphology, 179, 300–314,
https://doi.org/10.1016/j.geomorph.2012.08.021, 2012.
Westoby, M. J., Rounce, D. R., Shaw, T. E., Fyffe, C. L., Moore, P. L.,
Stewart, R. L., and Brock, B. W.: Geomorphological evolution of a
debris-covered glacier surface, Earth Surf. Proc. Land., 45,
3431–3448, https://doi.org/10.1002/esp.4973, 2020.
Short summary
Ice cliffs are believed to be important contributors to the melt of debris-covered glaciers, but this has rarely been quantified as the cliffs can disappear or rapidly expand within a few weeks. We used photogrammetry techniques to quantify the weekly evolution and melt of four cliffs. We found that their behaviour and melt during the monsoon is strongly controlled by supraglacial debris, streams and ponds, thus providing valuable insights on the melt and evolution of debris-covered glaciers.
Ice cliffs are believed to be important contributors to the melt of debris-covered glaciers, but...
