Articles | Volume 12, issue 1
https://doi.org/10.5194/tc-12-401-2018
© 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-12-401-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
31 Jan 2018
Research article |
| 31 Jan 2018
| 31 Jan 2018
Investigating cold based summit glaciers through direct access to the glacier base: a case study constraining the maximum age of Chli Titlis glacier, Switzerland
Pascal Bohleber
CORRESPONDING AUTHOR
Institute for Interdisciplinary Mountain Research, Austrian Academy of Sciences, Innsbruck, Austria
Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany
Helene Hoffmann
Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany
Johanna Kerch
Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany
Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany
independent researcher
formerly at: Department of Geosciences, University of Fribourg, Fribourg, Switzerland
Andrea Fischer
Institute for Interdisciplinary Mountain Research, Austrian Academy of Sciences, Innsbruck, Austria
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Pascal Bohleber, Mathieu Casado, Kirsti Ashworth, Chelsey A. Baker, Anna Belcher, Jilda Alicia Caccavo, Holly E. Jenkins, Erin Satterthwaite, Andrea Spolaor, and V. Holly L. Winton
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Martin Stocker-Waldhuber, Andrea Fischer, Kay Helfricht, and Michael Kuhn
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Johanna Kerch, Anja Diez, Ilka Weikusat, and Olaf Eisen
The Cryosphere, 12, 1715–1734, https://doi.org/10.5194/tc-12-1715-2018, https://doi.org/10.5194/tc-12-1715-2018, 2018
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We investigate the effect of crystal anisotropy on seismic velocities in glacier ice by calculating seismic phase velocities using the exact c axis angles to describe the crystal orientations in ice-core samples for an alpine and a polar ice core. Our results provide uncertainty estimates for earlier established approximative calculations. Additionally, our findings highlight the variation in seismic velocity at non-vertical incidence as a function of the horizontal azimuth of the seismic plane.
Martin Stocker-Waldhuber, Andrea Fischer, Kay Helfricht, and Michael Kuhn
The Cryosphere Discuss., https://doi.org/10.5194/tc-2018-37, https://doi.org/10.5194/tc-2018-37, 2018
Revised manuscript has not been submitted
Pascal Bohleber, Tobias Erhardt, Nicole Spaulding, Helene Hoffmann, Hubertus Fischer, and Paul Mayewski
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This contribution presents two updated bedrock topographies and ice thickness distributions with a new uncertainty assessment for Gries- and Findelengletscher, Switzerland. The results are based on ground-penetrating radar (GPR) measurements and the
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The Cryosphere, 11, 469–482, https://doi.org/10.5194/tc-11-469-2017, https://doi.org/10.5194/tc-11-469-2017, 2017
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Andrea Fischer, Kay Helfricht, and Martin Stocker-Waldhuber
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L. Sold, M. Huss, A. Eichler, M. Schwikowski, and M. Hoelzle
The Cryosphere, 9, 1075–1087, https://doi.org/10.5194/tc-9-1075-2015, https://doi.org/10.5194/tc-9-1075-2015, 2015
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The Cryosphere, 9, 753–766, https://doi.org/10.5194/tc-9-753-2015, https://doi.org/10.5194/tc-9-753-2015, 2015
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A time series of four Austrian glacier inventories (GIs) from the LIA maximum state up to the year 2006 show a decrease of glacier area to 44% of the LIA area. The annual relative area losses are 0.3%/year for the period GI LIA to GI 1 (1969), with one period with major glacier advances in the 1920s. From GI 1 to GI 2 (1969-1998, one advance period of variable length in the 1980s) glacier area decreased by 0.6%/year, and from GI 2 to GI 3 (10 years, no advance period) by 1.2%/year.
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Short summary
In this study we use an existing ice cave at Chli Titlis (3030 m, central Switzerland) to obtain direct access to ice at the glacier base. Using standard glaciological tools as well as the analysis of the isotopic and physical properties we demonstrate that stagnant cold ice conditions still exist fairly unchanged more than 25 years after a pioneering exploration. Our radiocarbon dating of the basal ice indicates that Chli Titlis has likely been ice-covered for about the last 5000 years.
In this study we use an existing ice cave at Chli Titlis (3030 m, central Switzerland) to obtain...
