Articles | Volume 18, issue 4
https://doi.org/10.5194/tc-18-1633-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/tc-18-1633-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Fifty years of firn evolution on Grigoriev ice cap, Tien Shan, Kyrgyzstan
Department of Geosciences, University of Fribourg, Fribourg, Switzerland
Anja Eichler
Laboratory of Environmental Chemistry, Paul Scherrer Institute, Villigen PSI, Switzerland
Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
Margit Schwikowski
Laboratory of Environmental Chemistry, Paul Scherrer Institute, Villigen PSI, Switzerland
Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
Sabina Brütsch
Laboratory of Environmental Chemistry, Paul Scherrer Institute, Villigen PSI, Switzerland
Enrico Mattea
Department of Geosciences, University of Fribourg, Fribourg, Switzerland
Stanislav Kutuzov
Byrd Polar and Climate Research Center, The Ohio State University, Columbus OH, USA
School of Earth Sciences, The Ohio State University, Columbus OH, USA
Martin Heule
Radioanalytics, Paul Scherrer Institute, Villigen PSI, Switzerland
Ryskul Usubaliev
Central Asian Institute of Applied Geosciences (CAIAG), Bishkek, Kyrgyzstan
Sultan Belekov
KyrgyzHydromet, Bishkek, Kyrgyzstan
Vladimir N. Mikhalenko
Moscow, Russia (see the acknowledgements for details)
Martin Hoelzle
Department of Geosciences, University of Fribourg, Fribourg, Switzerland
Marlene Kronenberg
Department of Geosciences, University of Fribourg, Fribourg, Switzerland
now at: Axpo Holding AG, Baden, Switzerland
Data sets
Firn core data from Grigoriev Ice Cap, 1962 to present Horst Machguth et al. https://doi.org/10.5281/zenodo.10082960
Gregoriev firn data Marlene Kronenberg et al. https://doi.org/10.5281/zenodo.7113282
Short summary
In 2018 we drilled an 18 m ice core on the summit of Grigoriev ice cap, located in the Tien Shan mountains of Kyrgyzstan. The core analysis reveals strong melting since the early 2000s. Regardless of this, we find that the structure and temperature of the ice have changed little since the 1980s. The probable cause of this apparent stability is (i) an increase in snowfall and (ii) the fact that meltwater nowadays leaves the glacier and thereby removes so-called latent heat.
In 2018 we drilled an 18 m ice core on the summit of Grigoriev ice cap, located in the Tien Shan...