Articles | Volume 19, issue 2
https://doi.org/10.5194/tc-19-753-2025
© Author(s) 2025. 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-19-753-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
19 Feb 2025
Research article |
| 19 Feb 2025
| 19 Feb 2025
Reconstructed glacier area and volume changes in the European Alps since the Little Ice Age
Johannes Reinthaler
CORRESPONDING AUTHOR
Department of Geography, University of Zurich, Zurich, Switzerland
Frank Paul
Department of Geography, University of Zurich, Zurich, Switzerland
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The terminus of San Quintín glacier, the largest of the Northern Patagonia Icefield in southern Chile, is rapidly disintegrating with large tabular icebergs into a proglacial lake left behind by this retreating glacier. We show that the ongoing retreat is caused by recent detachment of a floating terminus from the glacier bed. This process may lead to the disappearance of the last existing piedmont lobe in Patagonia, and one of the few remaining glaciers of this type in the world.
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The terminus of San Quintín glacier, the largest of the Northern Patagonia Icefield in southern Chile, is rapidly disintegrating with large tabular icebergs into a proglacial lake left behind by this retreating glacier. We show that the ongoing retreat is caused by recent detachment of a floating terminus from the glacier bed. This process may lead to the disappearance of the last existing piedmont lobe in Patagonia, and one of the few remaining glaciers of this type in the world.
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Glacier surges are widespread in the Karakoram and have been intensely studied using satellite data and DEMs. We use time series of such datasets to study three glacier surges in the same region of the Karakoram. We found strongly contrasting advance rates and flow velocities, maximum velocities of 30 m d−1, and a change in the surge mechanism during a surge. A sensor comparison revealed good agreement, but steep terrain and the two smaller glaciers caused limitations for some of them.
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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.
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Global mean sea-level change observed from 1993 to 2016 (mean rate of 3.05 mm yr−1) matches the combined effect of changes in water density (thermal expansion) and ocean mass. Ocean-mass change has been assessed through the contributions from glaciers, ice sheets, and land water storage or directly from satellite data since 2003. Our budget assessments of linear trends and monthly anomalies utilise new datasets and uncertainty characterisations developed within ESA's Climate Change Initiative.
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
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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.
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Zumbühl, H. J. and Nussbaumer, S. U.: Little ice age glacier history of the central and western Alps from pictorial documents, Geographical Research Letters, 44, 115–136, https://doi.org/10.18172/cig.3363, 2018.
Short summary
Since the end of the Little Ice Age (LIA) around 1850, glaciers in the European Alps have melted considerably. We collected LIA glacier extents, calculated changes using geoinformatics, and found a 57 % decrease in area (4244 km² to 1806 km²) and a 64 % decrease in volume (280 km³ to 100 km³) by 2015. The average glacier surface lowering was 44 m. After 2000, elevation change rates tripled. Over 1938 glaciers melted away completely, impacting entire regions.
Since the end of the Little Ice Age (LIA) around 1850, glaciers in the European Alps have melted...
