Articles | Volume 13, issue 7
https://doi.org/10.5194/tc-13-2075-2019
© Author(s) 2019. 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-13-2075-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
29 Jul 2019
Research article |
| 29 Jul 2019
| 29 Jul 2019
Airborne radionuclides and heavy metals in high Arctic terrestrial environment as the indicators of sources and transfers of contamination
Department of Nuclear Physical Chemistry, Institute of Nuclear Physics,
Polish Academy of Sciences, Kraków, 31-342, Poland
Agata Zaborska
Marine Chemistry and Biochemistry Department, Institute of Oceanology,
Polish Academy of Sciences, Sopot, 81-712, Poland
Ireneusz Sobota
Department of Hydrology and Water Management, Polar Research Centre,
Nicholas Copernicus University, Toruń, 87-100, Poland
Paweł Gaca
School of Ocean and Earth Science, University of Southampton, National
Oceanography Centre, European Way, Southampton, SO14 3ZH, UK
J. Andrew Milton
School of Ocean and Earth Science, University of Southampton, National
Oceanography Centre, European Way, Southampton, SO14 3ZH, UK
Paweł Kocurek
Research and Development Laboratory for Aerospace Materials,
Rzeszów University of Technology, Rzeszów, 35-959, Poland
Anna Cwanek
Department of Nuclear Physical Chemistry, Institute of Nuclear Physics,
Polish Academy of Sciences, Kraków, 31-342, Poland
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Marion A. McKenzie, Lauren E. Miller, Jacob S. Slawson, Emma J. MacKie, and Shujie Wang
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Andreas Alexander, Jaroslav Obu, Thomas V. Schuler, Andreas Kääb, and Hanne H. Christiansen
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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.
Ugo Nanni, Florent Gimbert, Christian Vincent, Dominik Gräff, Fabian Walter, Luc Piard, and Luc Moreau
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Our study addresses key questions on the subglacial drainage system physics through a novel observational approach that overcomes traditional limitations. We conducted, over 2 years, measurements of the subglacial water-flow-induced seismic noise and of glacier basal sliding speeds. We then inverted for the subglacial channel's hydraulic pressure gradient and hydraulic radius and investigated the links between the equilibrium state of subglacial channels and glacier basal sliding.
Fabian Lindner, Fabian Walter, Gabi Laske, and Florent Gimbert
The Cryosphere, 14, 287–308, https://doi.org/10.5194/tc-14-287-2020, https://doi.org/10.5194/tc-14-287-2020, 2020
Benedict T. I. Reinardy, Adam D. Booth, Anna L. C. Hughes, Clare M. Boston, Henning Åkesson, Jostein Bakke, Atle Nesje, Rianne H. Giesen, and Danni M. Pearce
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Cold-ice processes may be widespread within temperate glacier systems but the role of cold-ice processes in temperate glacier systems is relatively unknown. Climate forcing is the main control on glacier mass balance but potential for heterogeneous thermal conditions at temperate glaciers calls for improved model assessments of future evolution of thermal conditions and impacts on glacier dynamics and mass balance. Cold-ice processes need to be included in temperate glacier land system models.
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Short summary
Cryoconite granules built of mineral particles, organic substances and living organisms significantly influence fluxes of energy and matter at glacier surfaces. They contribute to ice melting, give rise to an exceptional ecosystem, and effectively trap contaminants. This study evaluates contamination levels of radionuclides in cryoconite from Arctic glaciers and identifies sources of this contamination, proving that cryoconite is an excellent indicator of atmospheric contamination.
Cryoconite granules built of mineral particles, organic substances and living organisms...
