Articles | Volume 15, issue 2
https://doi.org/10.5194/tc-15-485-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-15-485-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Feb 2021
Research article |
| 02 Feb 2021
| 02 Feb 2021
Thinning leads to calving-style changes at Bowdoin Glacier, Greenland
Eef C. H. van Dongen
CORRESPONDING AUTHOR
Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zurich, Zurich, Switzerland
Guillaume Jouvet
Department of Geography, University of Zurich, Zurich, Switzerland
Autonomous Systems Laboratory, ETH Zurich, Zurich, Switzerland
Shin Sugiyama
Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan
Evgeny A. Podolskiy
Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan
Martin Funk
Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zurich, Zurich, Switzerland
Douglas I. Benn
Department of Geography and Sustainable Development, University of St Andrews, St Andrews, UK
Fabian Lindner
Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zurich, Zurich, Switzerland
Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, Munich, Germany
Andreas Bauder
Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zurich, Zurich, Switzerland
Julien Seguinot
Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zurich, Zurich, Switzerland
Silvan Leinss
Institute of Environmental Engineering, ETH Zurich, Zurich, Switzerland
Fabian Walter
Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zurich, Zurich, Switzerland
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Mass movements constitute a risk to property and human life. In this study we use machine learning to automatically detect and classify slope failure events using ground vibrations. We explore the influence of non-ideal though commonly encountered conditions: poor network coverage, small number of events, and low signal-to-noise ratios. Our approach enables us to detect the occurrence of rare events of high interest in a large data set of more than a million windowed seismic signals.
Guillaume Jouvet, Stefan Röllin, Hans Sahli, José Corcho, Lars Gnägi, Loris Compagno, Dominik Sidler, Margit Schwikowski, Andreas Bauder, and Martin Funk
The Cryosphere, 14, 4233–4251, https://doi.org/10.5194/tc-14-4233-2020, https://doi.org/10.5194/tc-14-4233-2020, 2020
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We show that plutonium is an effective tracer to identify ice originating from the early 1960s at the surface of a mountain glacier after a long time within the ice flow, giving unique information on the long-term former ice motion. Combined with ice flow modelling, the dating can be extended to the entire glacier, and we show that an airplane which crash-landed on the Gauligletscher in 1946 will likely soon be released from the ice close to the place where pieces have emerged in recent years.
Kenneth D. Mankoff, Brice Noël, Xavier Fettweis, Andreas P. Ahlstrøm, William Colgan, Ken Kondo, Kirsty Langley, Shin Sugiyama, Dirk van As, and Robert S. Fausto
Earth Syst. Sci. Data, 12, 2811–2841, https://doi.org/10.5194/essd-12-2811-2020, https://doi.org/10.5194/essd-12-2811-2020, 2020
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This work partitions regional climate model (RCM) runoff from the MAR and RACMO RCMs to hydrologic outlets at the ice margin and coast. Temporal resolution is daily from 1959 through 2019. Spatial grid is ~ 100 m, resolving individual streams. In addition to discharge at outlets, we also provide the streams, outlets, and basin geospatial data, as well as a script to query and access the geospatial or time series discharge data from the data files.
Gregory Church, Melchior Grab, Cédric Schmelzbach, Andreas Bauder, and Hansruedi Maurer
The Cryosphere, 14, 3269–3286, https://doi.org/10.5194/tc-14-3269-2020, https://doi.org/10.5194/tc-14-3269-2020, 2020
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In this field study, we repeated ground-penetrating radar measurements over an active englacial channel network that transports meltwater through the glacier. We successfully imaged the englacial meltwater pathway and were able to delimitate the channel's shape. Meltwater from the glacier can impact the glacier's dynamics if it reaches the ice–bed interface, and therefore monitoring these englacial drainage networks is important to understand how these networks behave throughout a season.
Cited articles
Alley, K. E., Scambos, T. A., Alley, R. B., and Holschuh, N.: Troughs developed
in ice-stream shear margins precondition ice shelves for ocean-driven
breakup, Sci. Adv., 5, eaax2215, https://doi.org/10.1126/sciadv.aax2215, 2019. a
Åström, J. A., Vallot, D., Schäfer, M., Welty, E. Z., O'Neel, S.,
Bartholomaus, T. C., Liu, Y., Riikilä, T. I., Zwinger, T., Timonen, J., and
Moore, J. C.: Termini of calving glaciers as self-organized critical systems,
Nat. Geosci., 7, 874–878, https://doi.org/10.1038/ngeo2290, 2014. a
Benn, D. I. and Åström, J. A.: Calving glaciers and ice shelves, Adv.
Phys. X, 3, 1513819, https://doi.org/10.1080/23746149.2018.1513819, 2018. a, b, c, d
Benn, D. I., Warren, C. R., and Mottram, R. H.: Calving processes and the
dynamics of calving glaciers, Earth Sci. Rev., 82, 143–179, 2007. a
Benn, D. I., Åström, J., Zwinger, T., Todd, J., Nick, F. M., Cook, S.,
Hulton, N. R., and Luckman, A.: Melt-under-cutting and buoyancy-driven
calving from tidewater glaciers: new insights from discrete element and
continuum model simulations, J. Glaciol., 63, 691–702,
https://doi.org/10.1017/jog.2017.41, 2017. a, b, c, d
Bjørk, A. A., Kruse, L. M., and Michaelsen, P. B.: Brief communication: Getting Greenland's glaciers right – a new data set of all official Greenlandic glacier names, The Cryosphere, 9, 2215–2218, https://doi.org/10.5194/tc-9-2215-2015, 2015. a
Brunt, K. M.: Tidal motion of the Ross Ice Shelf and its interaction with the
Siple Coast ice streams, Antarctica, PhD thesis, The University of Chicago,
2008. a
Catania, G. A., Stearns, L. A., Moon, T. A., Enderlin, E. M., and Jackson,
R. H.: Future Evolution of Greenland's Marine-Terminating Outlet Glaciers, J.
Geophys. Res.-Ea., 125, e2018JF004873, https://doi.org/10.1029/2018JF004873, 2020. a
Davis, J., Elosegui, P., Hamilton, G., Stearns, L., Langer, M., Nettles, M.,
and Larsen, T.: Mechanisms for tidally induced glacier deformation and flow
variations, east Greenland, AGUFM, 2007, G33B–1234, 2007. a
de Juan, J., Elósegui, P., Nettles, M., Larsen, T. B., Davis, J. L.,
Hamilton, G. S., Stearns, L. A., Andersen, M. L., Ekström, G.,
Ahlstrøm, A. P.,
Stenseng, L., Abbas Khan, S., and Forsberg, R.: Sudden increase in tidal response linked to
calving and acceleration at a large Greenland outlet glacier, Geophys. Res.
Lett., 37, L12501, https://doi.org/10.1029/2010GL043289, 2010. a, b
Felikson, D., Bartholomaus, T. C., Catania, G. A., Korsgaard, N. J., Kjær,
K. H., Morlighem, M., Noël, B., Van Den Broeke, M., Stearns, L. A.,
Shroyer, E. L., Sutherland, D. A., and Nash, J. D.: Inland thinning on the Greenland ice sheet controlled
by outlet glacier geometry, Nat. Geosci., 10, 366–369, 2017. a
Fried, M., Catania, G., Stearns, L., Sutherland, D., Bartholomaus, T., Shroyer,
E., and Nash, J.: Reconciling drivers of seasonal terminus advance and
retreat at 13 Central West Greenland tidewater glaciers, J.
Geophys. Res.-Ea. Surf., 123, 1590–1607, 2018. a
Fried, M. J., Catania, G. A., Bartholomaus, T. C., Duncan, D., Davis, M.,
Stearns, L. A., Nash, J., Shroyer, E., and Sutherland, D.: Distributed
subglacial discharge drives significant submarine melt at a Greenland
tidewater glacier, Geophys. Res. Lett., 42, 9328–9336, 2015. a
Funk, M., Bauder, A., Wyder, T., van Dongen, E., and
Preiswerk, L.: Photo time series from Bowdoin Glacier, Greenland (2014–2019), ETH Zurich, https://doi.org/10.3929/ethz-b-000455251, 2020a. a
Funk, M., Bauder, A., Jouvet, G., Lindner, F.,
van Dongen, E., Walter, F., and Wyder, T.: GPS measurements of glacier flow on Bowdoin Glacier, Greenland, July 2019, ETH Zurich, https://doi.org/10.3929/ethz-b-000455331, 2020b. a
Gorelick, N., Hancher, M., Dixon, M., Ilyushchenko, S., Thau, D., and Moore,
R.: Google Earth Engine: Planetary-scale geospatial analysis for everyone,
Remote Sens. Environ., 202, 18–27, https://doi.org/10.1016/j.rse.2017.06.031,
2017. a
Hanson, B. and Hooke, R. L.: Glacier calving: a numerical model of forces in
the calving-speed/water-depth relation, J. Glaciol., 46, 188–196, 2000. a
Hill, E. A., Carr, J. R., and Stokes, C. R.: A review of recent changes in
major marine-terminating outlet glaciers in Northern Greenland, Frontiers
Earth Sci., 4, 111, https://doi.org/10.3389/feart.2016.00111, 2017. a
How, P., Schild, K., Benn, D., Noormets, R., Kirchner, N., Luckman, A., Vallot,
D., Hulton, N., and Borstad, C.: Calving controlled by melt-under-cutting:
detailed calving styles revealed through time-lapse observations, Ann.
Glaciol., 60, 20–31, https://doi.org/10.1017/aog.2018.28, 2019. a
Hulbe, C. L., LeDoux, C., and Cruikshank, K.: Propagation of long fractures in
the Ronne Ice Shelf, Antarctica, investigated using a numerical model
of fracture propagation, J. Glaciol., 56, 459–472, 2010. a
IMBIE Team: Mass balance of the Greenland Ice Sheet from 1992 to 2018,
Nature, 579, 233–239, https://doi.org/10.1038/s41586-019-1855-2, 2019. a, b, c
James, T. D., Murray, T., Selmes, N., Scharrer, K., and O’Leary, M.: Buoyant
flexure and basal crevassing in dynamic mass loss at Helheim Glacier,
Nat. Geosci., 7, 593, https://doi.org/10.1038/ngeo2204, 2014. a, b, c
Jouvet, G., Weidmann, Y., Kneib, M., Detert, M., Seguinot, J., Sakakibara, D.,
and Sugiyama, S.: Short-lived ice speed-up and plume water flow captured by a
VTOL UAV give insights into subglacial hydrological system of Bowdoin
Glacier, Remote Sens. Environ., 217, 389–399,
https://doi.org/10.1016/j.rse.2018.08.027, 2018. a, b
Jouvet, G., Weidmann, Y., and Funk, M.: Mapping of the calving front of Bowdoin
Glacier, Northwest Greenland, by UAV photogrammetry (2015),
https://doi.org/10.3929/ethz-b-000350885, 2019. a
Medrzycka, D., Benn, D. I., Box, J. E., Copland, L., and Balog, J.: Calving
Behavior at Rink Isbræ, West Greenland, from Time-Lapse
Photos, Arct. Antarct. Alp. Res., 48, 263–277, https://doi.org/10.1657/AAAR0015-059,
2016. a, b, c
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. a
Minowa, M., Podolskiy, E. A., Jouvet, G., Weidmann, Y., Sakakibara, D.,
Tsutaki, S., Genco, R., and Sugiyama, S.: Calving flux estimation from
tsunami waves, Earth Planet. Sci. Lett., 515, 283–290,
https://doi.org/10.1016/j.epsl.2019.03.023, 2019. a, b
Moon, T. and Joughin, I.: Changes in ice front position on Greenland's outlet
glaciers from 1992 to 2007, J. Geophys. Res.-Ea. Surf.,
113, https://doi.org/10.1029/2007JF000927, 2008. a
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. a
O'Leary, M. and Christoffersen, P.: Calving on tidewater glaciers amplified by submarine frontal melting, The Cryosphere, 7, 119–128, https://doi.org/10.5194/tc-7-119-2013, 2013. a
ORNL DAAC: MODIS and VIIRS Land Products Global Subsetting and Visualization
Tool. ORNL DAAC, Oak Ridge, Tennessee, USA, https://doi.org/10.3334/ORNLDAAC/1379,
2018. a
O’Neel, S., Echelmeyer, K., and Motyka, R.: Short-term flow dynamics of a
retreating tidewater glacier: LeConte Glacier, Alaska, USA, J.
Glaciol., 47, 567–578, 2001. a
Parizek, B. R., Christianson, K., Alley, R. B., Voytenko, D., Vaňková, I.,
Dixon, T. H., Walker, R. T., and Holland, D. M.: Ice-cliff failure via
retrogressive slumping, Geology, 47, 449–452, https://doi.org/10.1130/G45880.1, 2019. a
Podolskiy, E. A., Sugiyama, S., Funk, M., Walter, F., Genco, R., Tsutaki, S.,
Minowa, M., and Ripepe, M.: Tide-modulated ice flow variations drive
seismicity near the calving front of Bowdoin Glacier, Greenland,
Geophys. Res. Lett., 43, 2036–2044, https://doi.org/10.1002/2016GL067743, 2016. a
Pollard, D., DeConto, R. M., and Alley, R. B.: Potential Antarctic Ice Sheet
retreat driven by hydrofracturing and ice cliff failure, Earth Planet.
Sci. Lett., 412, 112–121, 2015. a
Porter, C., Morin, P., Howat, I., Noh, M.-J., Bates, B., Peterman, K., Keesey,
S., Schlenk, M., Gardiner, J., Tomko, K., Willis,
M., Kelleher, C., Cloutier, M., Husby, E., Foga, S., Nakamura, H.,
Platson, M., Wethington Jr., M., Williamson, C., Bauer, G., Enos,
J., Arnold, G., Kramer, W., Becker, P., Doshi, A., D’Souza, C.,
Cummens, P., Laurier, F., and Bojesen, M.: ArcticDEM, Harvard
Dataverse, https://doi.org/10.7910/DVN/OHHUKH, Release 7, 2018. a
Porter, D. F., Tinto, K. J., Boghosian, A., Cochran, J. R., Bell, R. E.,
Manizade, S. S., and Sonntag, J. G.: Bathymetric control of tidewater glacier
mass loss in northwest Greenland, Earth Planet. Sc. Lett., 401,
40–46, 2014. a
Price, S. F., Payne, A. J., Howat, I. M., and Smith, B. E.: Committed sea-level
rise for the next century from Greenland ice sheet dynamics during the past
decade, P. Natl. Acad. Sci., 108, 8978–8983,
2011. a
Pritchard, H. D., Arthern, R. J., Vaughan, D. G., and Edwards, L. A.: Extensive
dynamic thinning on the margins of the Greenland and Antarctic ice sheets,
Nature, 461, 971, https://doi.org/10.1038/nature08471, 2009. a, b
Rignot, E., Fenty, I., Xu, Y., Cai, C., and Kemp, C.: Undercutting of
marine-terminating glaciers in West Greenland, Geophys. Res. Lett., 42,
5909–5917, 2015. a
Sakakibara, D. and Sugiyama, S.: Ice front and flow speed variations of
marine-terminating outlet glaciers along the coast of Prudhoe Land,
northwestern Greenland, J. Glaciol., 64, 300–310,
https://doi.org/10.1017/jog.2018.20, 2018. a, b
Sciascia, R., Straneo, F., Cenedese, C., and Heimbach, P.: Seasonal variability
of submarine melt rate and circulation in an East Greenland fjord, J.
Geophys. Res.-Oceans, 118, 2492–2506, 2013. a
Strozzi, T., Luckman, A., Murray, T., Wegmuller, U., and Werner, C. L.: Glacier
motion estimation using SAR offset-tracking procedures, IEEE T.
Geosci. Remote, 40, 2384–2391,
https://doi.org/10.1109/TGRS.2002.805079, 2002. a
Sugiyama, S., Kanna, N., Sakakibara, D., Ando, T., Asaji, I., Kondo, K., Wang,
Y., Fujishi, Y., Fukumoto, S., Podolskiy, E., Fukamachi, Y., Takahashi, M.,
Matoba, S., Iizuka, Y., Greve, R., Furuya, M., Tateyama, K., Watanabe, T.,
Yamasaki, S., Yamaguchi, A., Nishizawa, B., Matsuno, K., Nomura, D.,
Sakuragi, Y., Matsumura, Y., Ohashi, Y., Aoki, T., Niwano, M., Hayashi, N.,
Minowa, M., Jouvet, G., van Dongen, E., Bauder, A., Funk, M., Bjørk,
A. A., and Oshima, T.: Rapidly changing glaciers, ocean and coastal
environments, and their impact on human society in the Qaanaaq region,
northwestern Greenland, Polar Sci., 100632,
https://doi.org/10.1016/j.polar.2020.100632, 2020. a
Takasu, T. and Yasuda, A.: Development of the low-cost RTK-GPS receiver with an
open source program package RTKLIB, in: International symposium on GPS/GNSS,
pp. 4–6, International Convention Center Jeju Korea, 2009. a
Thomas, R. H.: Tide-induced perturbations of glacier velocities, Global
Planet. Change, 59, 217–224, 2007. a
Todd, J., Christoffersen, P., Zwinger, T., Råback, P., and Benn, D. I.: Sensitivity of a calving glacier to ice–ocean interactions under climate change: new insights from a 3-D full-Stokes model, The Cryosphere, 13, 1681–1694, https://doi.org/10.5194/tc-13-1681-2019, 2019. a
Tsutaki, S., Sugiyama, S., Sakakibara, D., and Sawagaki, T.: Surface elevation
changes during 2007–13 on Bowdoin and Tugto Glaciers, northwestern
Greenland, J. Glaciol., 62, 1083–1092, https://doi.org/10.1017/jog.2016.106, 2016. a
van Dongen, E., Funk, M., Walter, A., and Kneib, M.: Mapping of the calving front of Bowdoin Glacier, Northwest Greenland, by UAV
photogrammetry (2017), ETH Zurich, https://doi.org/10.3929/ethz-b-000455215, 2020a. a
van Dongen, E., Jouvet, G., and Walter, F.: Mapping of the calving front of Bowdoin Glacier, Northwest Greenland, by UAV
photogrammetry (2019), ETH Zurich, https://doi.org/10.3929/ethz-b-000455210, 2020b. a
van Dongen, E., Jouvet, G., Walter, A., Todd, J., Zwinger, T., Asaji, I.,
Sugiyama, S., Walter, F., and Funk, M.: Tides modulate crevasse opening prior
to a major calving event at Bowdoin Glacier, Northwest Greenland, J.
Glaciol., 66, 113–123, https://doi.org/10.1017/jog.2019.89, 2020c. a, b, c, d, e, f, g, h, i, j
van Dongen, E. C., Åström, J. A., Jouvet, G., Todd, J., Benn, D. I.,
and Funk, M.: Numerical Modeling Shows Increased Fracturing Due to
Melt-Undercutting Prior to Major Calving at Bowdoin Glacier, Front.
Earth Sci., 8, 253, https://doi.org/10.3389/feart.2020.00253, 2020d. a, b, c, d
Walter, A., Lüthi, M. P., and Vieli, A.: Calving event size measurements and statistics of Eqip Sermia, Greenland, from terrestrial radar interferometry, The Cryosphere, 14, 1051–1066, https://doi.org/10.5194/tc-14-1051-2020, 2020. a
Walter, F., O'Neel, S., McNamara, D., Pfeffer, W., Bassis, J. N., and Fricker,
H. A.: Iceberg calving during transition from grounded to floating ice:
Columbia Glacier, Alaska, Geophys. Res. Lett., 37, https://doi.org/10.1029/2010GL043201, 2010. a, b, c
Walters, R. A. and Dunlap, W. W.: Analysis of time series of glacier speed:
Columbia Glacier, Alaska, J. Geophys. Res.-Sol. Ea., 92,
8969–8975, 1987. a
Short summary
The dynamic mass loss of tidewater glaciers is strongly linked to glacier calving. We study calving mechanisms under a thinning regime, based on 5 years of field and remote-sensing data of Bowdoin Glacier. Our data suggest that Bowdoin Glacier ungrounded recently, and its calving behaviour changed from calving due to surface crevasses to buoyancy-induced calving resulting from basal crevasses. This change may be a precursor to glacier retreat.
The dynamic mass loss of tidewater glaciers is strongly linked to glacier calving. We study...
