Articles | Volume 14, issue 11
https://doi.org/10.5194/tc-14-4217-2020
© Author(s) 2020. 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-14-4217-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 Nov 2020
Research article |
| 26 Nov 2020
| 26 Nov 2020
Subglacial permafrost dynamics and erosion inside subglacial channels driven by surface events in Svalbard
Andreas Alexander
CORRESPONDING AUTHOR
Department of Geosciences, University of Oslo, 0316 Oslo, Norway
Department of Arctic Geology, The University Centre in Svalbard, 9171 Longyearbyen, Norway
Jaroslav Obu
Department of Geosciences, University of Oslo, 0316 Oslo, Norway
Thomas V. Schuler
Department of Geosciences, University of Oslo, 0316 Oslo, Norway
Andreas Kääb
Department of Geosciences, University of Oslo, 0316 Oslo, Norway
Hanne H. Christiansen
Department of Arctic Geology, The University Centre in Svalbard, 9171 Longyearbyen, Norway
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Bas Altena, Andreas Kääb, and Bert Wouters
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Repeat overflights of satellites are used to estimate surface displacements. However, such products lack a simple error description for individual measurements, but variation in precision occurs, since the calculation is based on the similarity of texture. Fortunately, variation in precision manifests itself in the correlation peak, which is used for the displacement calculation. This spread is used to make a connection to measurement precision, which can be of great use for model inversion.
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Youhua Ran, Xin Li, Guodong Cheng, Jingxin Che, Juha Aalto, Olli Karjalainen, Jan Hjort, Miska Luoto, Huijun Jin, Jaroslav Obu, Masahiro Hori, Qihao Yu, and Xiaoli Chang
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Tazio Strozzi, Andreas Wiesmann, Andreas Kääb, Thomas Schellenberger, and Frank Paul
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2022-44, https://doi.org/10.5194/essd-2022-44, 2022
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Knowledge on surface velocity of glaciers and ice caps contributes to a better understanding of a wide range of processes related to glacier dynamics, mass change and response to climate. Based on the release of historical satellite radar data from various space agencies we compiled nearly complete mosaics of winter ice surface velocities for the 1990's over the Eastern Arctic. Compared to the present state, we observe a general increase of ice velocities along with a retreat of glacier fronts.
Johan H. Scheller, Mikhail Mastepanov, Hanne H. Christiansen, and Torben R. Christensen
Biogeosciences, 18, 6093–6114, https://doi.org/10.5194/bg-18-6093-2021, https://doi.org/10.5194/bg-18-6093-2021, 2021
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Our study presents a time series of methane emissions in a high-Arctic-tundra landscape over 14 summers, which shows large variations between years. The methane emissions from the valley are expected to more than double in the late 21st century. This warming increases permafrost thaw, which could increase surface erosion in the valley. Increased erosion could offset some of the rise in methane fluxes from the valley, but this would require large-scale impacts on vegetated surfaces.
Paul Willem Leclercq, Andreas Kääb, and Bas Altena
The Cryosphere, 15, 4901–4907, https://doi.org/10.5194/tc-15-4901-2021, https://doi.org/10.5194/tc-15-4901-2021, 2021
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In this study we present a novel method to detect glacier surge activity. Surges are relevant as they disturb the link between glacier change and climate, and studying surges can also increase understanding of glacier flow. We use variations in Sentinel-1 radar backscatter strength, calculated with the use of Google Earth Engine, to detect surge activity. In our case study for the year 2018–2019 we find 69 cases of surging glaciers globally. Many of these were not previously known to be surging.
Chloé Scholzen, Thomas V. Schuler, and Adrien Gilbert
The Cryosphere, 15, 2719–2738, https://doi.org/10.5194/tc-15-2719-2021, https://doi.org/10.5194/tc-15-2719-2021, 2021
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Juditha Undine Schmidt, Bernd Etzelmüller, Thomas Vikhamar Schuler, Florence Magnin, Julia Boike, Moritz Langer, and Sebastian Westermann
The Cryosphere, 15, 2491–2509, https://doi.org/10.5194/tc-15-2491-2021, https://doi.org/10.5194/tc-15-2491-2021, 2021
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This study presents rock surface temperatures (RSTs) of steep high-Arctic rock walls on Svalbard from 2016 to 2020. The field data show that coastal cliffs are characterized by warmer RSTs than inland locations during winter seasons. By running model simulations, we analyze factors leading to that effect, calculate the surface energy balance and simulate different future scenarios. Both field data and model results can contribute to a further understanding of RST in high-Arctic rock walls.
Andreas Kääb, Mylène Jacquemart, Adrien Gilbert, Silvan Leinss, Luc Girod, Christian Huggel, Daniel Falaschi, Felipe Ugalde, Dmitry Petrakov, Sergey Chernomorets, Mikhail Dokukin, Frank Paul, Simon Gascoin, Etienne Berthier, and Jeffrey S. Kargel
The Cryosphere, 15, 1751–1785, https://doi.org/10.5194/tc-15-1751-2021, https://doi.org/10.5194/tc-15-1751-2021, 2021
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Hardly recognized so far, giant catastrophic detachments of glaciers are a rare but great potential for loss of lives and massive damage in mountain regions. Several of the events compiled in our study involve volumes (up to 100 million m3 and more), avalanche speeds (up to 300 km/h), and reaches (tens of kilometres) that are hard to imagine. We show that current climate change is able to enhance associated hazards. For the first time, we elaborate a set of factors that could cause these events.
Elena Barbaro, Krystyna Koziol, Mats P. Björkman, Carmen P. Vega, Christian Zdanowicz, Tonu Martma, Jean-Charles Gallet, Daniel Kępski, Catherine Larose, Bartłomiej Luks, Florian Tolle, Thomas V. Schuler, Aleksander Uszczyk, and Andrea Spolaor
Atmos. Chem. Phys., 21, 3163–3180, https://doi.org/10.5194/acp-21-3163-2021, https://doi.org/10.5194/acp-21-3163-2021, 2021
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This paper shows the most comprehensive seasonal snow chemistry survey to date, carried out in April 2016 across 22 sites on 7 glaciers across Svalbard. The dataset consists of the concentration, mass loading, spatial and altitudinal distribution of major ion species (Ca2+, K+,
Na2+, Mg2+,
NH4+, SO42−,
Br−, Cl− and
NO3−), together with its stable oxygen and hydrogen isotope composition (δ18O and
δ2H) in the snowpack. This study was part of the larger Community Coordinated Snow Study in Svalbard.
Christian Zdanowicz, Jean-Charles Gallet, Mats P. Björkman, Catherine Larose, Thomas Schuler, Bartłomiej Luks, Krystyna Koziol, Andrea Spolaor, Elena Barbaro, Tõnu Martma, Ward van Pelt, Ulla Wideqvist, and Johan Ström
Atmos. Chem. Phys., 21, 3035–3057, https://doi.org/10.5194/acp-21-3035-2021, https://doi.org/10.5194/acp-21-3035-2021, 2021
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Black carbon (BC) aerosols are soot-like particles which, when transported to the Arctic, darken snow surfaces, thus indirectly affecting climate. Information on BC in Arctic snow is needed to measure their impact and monitor the efficacy of pollution-reduction policies. This paper presents a large new set of BC measurements in snow in Svalbard collected between 2007 and 2018. It describes how BC in snow varies across the archipelago and explores some factors controlling these variations.
Andreas Kääb, Tazio Strozzi, Tobias Bolch, Rafael Caduff, Håkon Trefall, Markus Stoffel, and Alexander Kokarev
The Cryosphere, 15, 927–949, https://doi.org/10.5194/tc-15-927-2021, https://doi.org/10.5194/tc-15-927-2021, 2021
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We present a map of rock glacier motion over parts of the northern Tien Shan and time series of surface speed for six of them over almost 70 years.
This is by far the most detailed investigation of this kind available for central Asia.
We detect a 2- to 4-fold increase in rock glacier motion between the 1950s and present, which we attribute to atmospheric warming.
Relative to the shrinking glaciers in the region, this implies increased importance of periglacial sediment transport.
Aynom T. Teweldebrhan, Thomas V. Schuler, John F. Burkhart, and Morten Hjorth-Jensen
Hydrol. Earth Syst. Sci., 24, 4641–4658, https://doi.org/10.5194/hess-24-4641-2020, https://doi.org/10.5194/hess-24-4641-2020, 2020
Ankit Pramanik, Jack Kohler, Katrin Lindbäck, Penelope How, Ward Van Pelt, Glen Liston, and Thomas V. Schuler
The Cryosphere Discuss., https://doi.org/10.5194/tc-2020-197, https://doi.org/10.5194/tc-2020-197, 2020
Revised manuscript not accepted
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Freshwater discharge from tidewater glaciers influences fjord circulation and fjord ecosystem. Glacier hydrology plays crucial role in transporting water underneath glacier ice. We investigated hydrology beneath the tidewater glaciers of Kongsfjord basin in Northwest Svalbard and found that subglacial water flow differs substantially from surface flow of glacier ice. Furthermore, we derived freshwater discharge time-series from all the glaciers to the fjord.
Cited articles
Alexander, A.: Numerical modeling of the cold based glacier Larsbreen in
Svalbard, Master's thesis, Friedrich-Alexander Universität
Erlangen-Nürnberg, 2017. a
Alexander, A., Obu, J., Schuler, T. V., Kääb, A., and Christiansen, H. H.: Raw data: Subglacial permafrost dynamics and erosion inside subglacial channels driven by surface events in Svalbard, Zenodo, https://doi.org/10.5281/zenodo.4116256, 2020. a
Astakhov, V. I., Kaplyanskaya, F. A., and Tarnogradsky, V. D.: Pleistocene
Permafrost of West Siberia as a Deformable Glacier Bed, Permafrost
Periglac., 7, 165–191,
https://doi.org/10.1002/(SICI)1099-1530(199604)7:2%3C165::AID-PPP218%3E3.0.CO;2-S,
1996. a
Bælum, K. and Benn, D. I.: Thermal structure and drainage system of a small valley glacier (Tellbreen, Svalbard), investigated by ground penetrating radar, The Cryosphere, 5, 139–149, https://doi.org/10.5194/tc-5-139-2011, 2011. a, b
Björnsson, H., Gjessing, Y., Hamran, S.-E., Hagen, J. O., LiestøL, O.,
Pálsson, F., and Erlingsson, B.: The Thermal Regime of Sub-Polar Glaciers
Mapped by Multi-Frequency Radio-Echo Sounding, J. Glaciol., 42,
23–32, 1996. a
Costard, F., Dupeyrat, L., Gautier, E., and Carey-Gailhardis, E.: Fluvial
Thermal Erosion Investigations along a Rapidly Eroding River Bank:
Application to the Lena River (Central Siberia), Earth Surf.
Process. Land., 28, 1349–1359, https://doi.org/10.1002/esp.592, 2003. a
Costard, F., Gautier, E., Fedorov, A., Konstantinov, P., and Dupeyrat, L.: An
Assessment of the Erosion Potential of the Fluvial Thermal
Process during Ice Breakups of the Lena River (Siberia),
Permafrost Periglac., 25, 162–171, https://doi.org/10.1002/ppp.1812,
2014. a
Cuffey, K. M., Conway, H., Hallet, B., Gades, A. M., and Raymond, C. F.:
Interfacial Water in Polar Glaciers and Glacier Sliding at
−17 ∘C, Geophys. Res. Lett., 26, 751–754,
https://doi.org/10.1029/1999GL900096, 1999. a
Cutler, P. M., MacAyeal, D. R., Mickelson, D. M., Parizek, B. R., and Colgan,
P. M.: A Numerical Investigation of Ice-Lobe – Permafrost
Interaction around the Southern Laurentide Ice Sheet, J.
Glaciol. 46, 311–325, 2000. a
Dular, M.: A short introduction to Speleoliti mapping software, Compass Points,
36, 8–11, 2006. a
Dupeyrat, L., Costard, F., Randriamazaoro, R., Gailhardis, E., Gautier, E., and
Fedorov, A.: Effects of Ice Content on the Thermal Erosion of
Permafrost: Implications for Coastal and Fluvial Erosion,
Permafrost Periglac., 22, 179–187, https://doi.org/10.1002/ppp.722,
2011. a
Echelmeyer, K. and Zhongxiang, W.: Direct Observation of Basal Sliding
and Deformation of Basal Drift at Sub-Freezing Temperatures,
J. Glaciol., 33, 83–98, https://doi.org/10.3189/S0022143000005396, 1987. a
Etzelmüller, B., Ødegård, R. S., Vatne, G., Mysterud, R. S.,
Tonning, T., and Sollid, J. L.: Glacier Characteristics and Sediment Transfer
System of Longyearbreen and Larsbreen, Western Spitsbergen, Norsk
Geografisk Tidsskrift – Norwegian Journal of Geography, 54, 157–168,
https://doi.org/10.1080/002919500448530, 2000. a
Etzelmüller, B., Schuler, T. V., Isaksen, K., Christiansen, H. H., Farbrot, H., and Benestad, R.: Modeling the temperature evolution of Svalbard permafrost during the 20th and 21st century, The Cryosphere, 5, 67–79, https://doi.org/10.5194/tc-5-67-2011, 2011. a
Fitzsismon, S. J., McManus, K. J., and Lorrain, R. D.: Structure and Strength
of Basal Ice and Substrate of a Dry-Based Glacier: Evidence for Substrate
Deformation at Sub-Freezing Temperatures, Ann. Glaciol., 28, 236–240,
https://doi.org/10.3189/172756499781821878, 1999. a
Germain, S. L. S. and Moorman, B. J.: Long-Term Observations of Supraglacial
Streams on an Arctic Glacier, J. Glaciol., 65, 900–911,
https://doi.org/10.1017/jog.2019.60, 2019. a
Giard, D. and Bazile, E.: Implementation of a New Assimilation Scheme for
Soil and Surface Variables in a Global NWP Model, Mon. Weather
Rev., 128, 997–1015,
https://doi.org/10.1175/1520-0493(2000)128<0997:IOANAS>2.0.CO;2, 2000. a
Gulley, J., Benn, D., Müller, D., and Luckman, A.: A cut-and-closure origin
for englacial conduits in uncrevassed regions of polythermal glaciers,
J. Glaciol., 55, 66–80, https://doi.org/10.3189/002214309788608930,
2009. a, b
Gulley, J. D., Spellman, P. D., Covington, M. D., Martin, J. B., Benn, D. I.,
and Catania, G.: Large values of hydraulic roughness in subglacial conduits
during conduit enlargement: implications for modeling conduit evolution,
Earth Surf. Proc. Land., 39, 296–310, https://doi.org/10.1002/esp.3447,
2014. a
Haeberli, W.: Investigating Glacier-Permafrost Relationships in High-Mountain
Areas: Historical Background, Selected Examples and Research Needs,
Geological Society, London, Special Publications, 242, 29–37,
https://doi.org/10.1144/GSL.SP.2005.242.01.03, 2005. a, b
Hallet, B., Hunter, L., and Bogen, J.: Rates of erosion and sediment evacuation
by glaciers: A review of field data and their implications, Global
Planet. Change, 12, 213–235, 1996. a
Harris, C. and Murton, J. B.: Interactions between Glaciers and Permafrost: An
Introduction, Geological Society, London, Special Publications, 242, 1–9,
https://doi.org/10.1144/GSL.SP.2005.242.01.01, 2005. a
Heeb, B.: DistoX2 Calibration Manual, available at:
https://paperless.bheeb.ch/download/DistoX2_CalibrationManual.pdf (last access: 4 December 2019),
2013. a
Herron, S. and Langway, C. C.: The Debris-Laden Ice at the Bottom of the
Greenland Ice Sheet, J. Glaciol., 23, 193–207, 1979. a
Hodgkins, R.: Glacier hydrology in Svalbard, Norwegian high arctic,
Quaternary Sci. Rev., 16, 957–973,
https://doi.org/10.1016/S0277-3791(97)00032-2,
1997. a
Hodgkins, R., Cooper, R., Wadham, J., and Tranter, M.: Suspended Sediment
Fluxes in a High-Arctic Glacierised Catchment: Implications for Fluvial
Sediment Storage, Sediment. Geol., 162, 105–117,
https://doi.org/10.1016/S0037-0738(03)00218-5, 2003. a
Isaksen, K., Førland, E., Dobler, A., Benestad, R., Haugen, J., and
Mezghani, A.: Klimascenarioer for Longyearbyen-området, Svalbard, MET
Norway Report, 14, 2017. a
Kleman, J. and Borgström, I.: Glacial Land Forms Indicative of a Partly
Frozen Bed, J. Glaciol., 40, 255–264, 1994. a
Kleman, J., Hättestrand, C., and Clarhäll, A.: Zooming in on Frozen-Bed
Patches: Scale-Dependent Controls on Fennoscandian Ice Sheet Basal
Thermal Zonation, Ann. Glaciol., 28, 189–194,
https://doi.org/10.3189/172756499781821670, 1999. a
Køltzow, M., Casati, B., Bazile, E., Haiden, T., and Valkonen, T.: An NWP
Model Intercomparison of Surface Weather Parameters in the European
Arctic during the Year of Polar Prediction Special Observing Period
Northern Hemisphere 1, Weather Forecast., 34, 959–983,
https://doi.org/10.1175/WAF-D-19-0003.1, 2019. a
Lovell, H., Fleming, E. J., Benn, D. I., Hubbard, B., Lukas, S., and Naegeli,
K.: Former dynamic behaviour of a cold-based valley glacier on Svalbard
revealed by basal ice and structural glaciology investigations, J.
Glaciol., 61, 309–328, https://doi.org/10.3189/2015JoG14J120,
2015a. a, b
Lovell, H., Fleming, E. J., Benn, D. I., Hubbard, B., Lukas, S., Rea, B. R.,
Noormets, R., and Flink, A. E.: Debris entrainment and landform genesis
during tidewater glacier surges: DEBRIS ENTRAINMENT DURING GLACIER
SURGES, J. Geophys. Res.-Earth Surf., 120, 1574–1595,
https://doi.org/10.1002/2015JF003509,
2015b. a
Lovell, H., Benn, D. I., Lukas, S., Ottesen, D., Luckman, A., Hardiman, M.,
Barr, I. D., Boston, C. M., and Sevestre, H.: Multiple Late Holocene
surges of a High-Arctic tidewater glacier system in Svalbard,
Quaternary Sci. Rev., 201, 162–185,
https://doi.org/10.1016/j.quascirev.2018.10.024,
2018. a
Marshall, S. J. and Clark, P. U.: Basal Temperature Evolution of North
American Ice Sheets and Implications for the 100-Kyr Cycle, Geophys.
Res. Lett., 29, 67-1–67-4, https://doi.org/10.1029/2002GL015192, 2002. a
Mathews, W. H. and Mackay, J. R.: Deformation of soils by glacier ice and the
influence of pore pressures and permafrost, Trans. R. Soc. Can., 54, 27–36, 1960. a
Menzies, J.: Temperatures within Subglacial Debris – A Gap in
Our Knowledge, Geology, 9, 271–273,
https://doi.org/10.1130/0091-7613(1981)9<271:TWSDAG>2.0.CO;2, 1981. a
Müller, M., Homleid, M., Ivarsson, K.-I., Køltzow, M. A. Ø.,
Lindskog, M., Midtbø, K. H., Andrae, U., Aspelien, T., Berggren, L.,
Bjørge, D., Dahlgren, P., Kristiansen, J., Randriamampianina, R., Ridal,
M., and Vignes, O.: AROME-MetCoOp: A Nordic Convective-Scale
Operational Weather Prediction Model, Weather Forecast., 32,
609–627, https://doi.org/10.1175/WAF-D-16-0099.1, 2017. a
Murton, J. B., Waller, R. I., Hart, J. K., Whiteman, C. A., Pollard, W. H., and
Clark, I. D.: Stratigraphy and Glaciotectonic Structures of Permafrost
Deformed beneath the Northwest Margin of the Laurentide Ice Sheet,
Tuktoyaktuk Coastlands, Canada, J. Glaciol., 50, 399–412,
https://doi.org/10.3189/172756504781829927, 2004. a
Naegeli, K., Lovell, H., Zemp, M., and Benn, D. I.: Dendritic subglacial
drainage systems in cold glaciers formed by cut-and-closure processes,
Geografiska Annaler: Series A, Physical Geography, 96, 591–608,
https://doi.org/10.1111/geoa.12059,
2014. a, b
Nuth, C., Kohler, J., König, M., von Deschwanden, A., Hagen, J. O., Kääb, A., Moholdt, G., and Pettersson, R.: Decadal changes from a multi-temporal glacier inventory of Svalbard, The Cryosphere, 7, 1603–1621, https://doi.org/10.5194/tc-7-1603-2013, 2013. a
Nuth, C., Gilbert, A., Köhler, A., McNabb, R., Schellenberger, T.,
Sevestre, H., Weidle, C., Girod, L., Luckman, A., and Kääb, A.:
Dynamic Vulnerability Revealed in the Collapse of an Arctic Tidewater
Glacier, Scientific Reports, 9, 5541, https://doi.org/10.1038/s41598-019-41117-0, 2019. a
Obu, J., Westermann, S., Bartsch, A., Berdnikov, N., Christiansen, H. H.,
Dashtseren, A., Delaloye, R., Elberling, B., Etzelmüller, B., Kholodov,
A., Khomutov, A., Kääb, A., Leibman, M. O., Lewkowicz, A. G., Panda,
S. K., Romanovsky, V., Way, R. G., Westergaard-Nielsen, A., Wu, T.,
Yamkhin, J., and Zou, D.: Northern Hemisphere Permafrost Map Based on
TTOP Modelling for 2000–2016 at 1 km2 Scale, Earth-Sci.
Rev., 193, 299–316, https://doi.org/10.1016/j.earscirev.2019.04.023, 2019. a, b
Obu, J., Westermann, S., Vieira, G., Abramov, A., Balks, M. R., Bartsch, A., Hrbáček, F., Kääb, A., and Ramos, M.: Pan-Antarctic map of near-surface permafrost temperatures at 1 km2 scale, The Cryosphere, 14, 497–519, https://doi.org/10.5194/tc-14-497-2020, 2020. a
Pflitsch, A., Cartaya, E., McGregor, B., Holmgren, D., and Steinhöfel, B.:
Climatologic Studies inside Sandy Glacier at Mount Hood Volcano in
Oregon, USA, J. Cave Karst Stud., 79, 189–206,
https://doi.org/10.4311/2015IC0135, 2017. a
Randriamazaoro, R., Dupeyrat, L., Costard, F., and Gailhardis, E. C.: Fluvial
Thermal Erosion: Heat Balance Integral Method, Earth Surf. Proc.
Land., 32, 1828–1840, https://doi.org/10.1002/esp.1489, 2007.
a
Sevestre, H., Benn, D. I., Hulton, N. R. J., and Bælum, K.: Thermal
structure of Svalbard glaciers and implications for thermal switch models
of glacier surging, J. Geophys.Res.-Earth Surf., 120,
2220–2236, https://doi.org/10.1002/2015JF003517,
2015. a
Sollid, J. L. and Sørbel, L.: Distribution of Glacial Landforms in Southern
Norway in Relation to the Thermal Regime of the Last Continental Ice
Sheet, Geografiska Annaler: Series A, Physical Geography, 76, 25–35, 1994. a
Tsytovich, N.: 1975: The mechanics of frozen ground, New York: McGraw Hill, 426
pp., 1975. a
Short summary
In this study we present subglacial air, ice and sediment temperatures from within the basal drainage systems of two cold-based glaciers on Svalbard during late spring and the summer melt season. We put the data into the context of air temperature and rainfall at the glacier surface and show the importance of surface events on the subglacial thermal regime and erosion around basal drainage channels. Observed vertical erosion rates thereby reachup to 0.9 m d−1.
In this study we present subglacial air, ice and sediment temperatures from within the basal...
