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Université de Fribourg

Worldwide version-controlled database of glacier thickness observations

Welty, Ethan ; Zemp, Michael ; Navarro, Francisco ; Huss, Matthias ; Fürst, Johannes J. ; Gärtner-Roer, Isabelle ; Landmann, Johannes ; Machguth, Horst ; Naegeli, Kathrin ; Andreassen, Liss M. ; Farinotti, Daniel ; Li, Huilin ; GlaThiDa Contributors

In: Earth System Science Data, 2020, vol. 12, no. 4, p. 3039–3055

Although worldwide inventories of glacier area have been coordinated internationally for several decades, a similar effort for glacier ice thicknesses was only initiated in 2013. Here, we present the third version of the Glacier Thickness Database (GlaThiDa v3), which includes 3 854 279 thickness measurements distributed over roughly 3000 glaciers worldwide. Overall, 14 % of global...

Université de Fribourg

A general theory of rock glacier creep based on in-situ and remote sensing observations

Cicoira, Alessandro ; Marcer, Marco ; Gärtner‐Roer, Isabelle ; Bodin, Xavier ; Arenson, Lukas U. ; Vieli, Andreas

In: Permafrost and Periglacial Processes, 2020, vol. 32, no. 1, p. 139-153

The ongoing acceleration in rock glacier velocities concurrent with increasing air temperatures, and the widespread onset of rock glacier destabilization have reinforced the interest in rock glacier dynamics and in its coupling to the climate system. Despite the increasing number of studies investigating this phenomenon, our knowledge of both the fundamental mechanisms controlling rock...

Université de Fribourg

Anthropogenic climate change and glacier lake outburst flood risk: local and global drivers and responsibilities for the case of lake Palcacocha, Peru

Huggel, Christian ; Carey, Mark ; Emmer, Adam ; Frey, Holger ; Walker-Crawford, Noah ; Wallimann-Helmer, Ivo

In: Natural Hazards and Earth System Sciences, 2020, vol. 20, no. 8, p. 2175–2193

Evidence of observed negative impacts on natural and human systems from anthropogenic climate change is increasing. However, human systems in particular are dynamic and influenced by multiple drivers and hence identifying an anthropogenic climate signal is challenging. Here we analyze the case of lake Palcacocha in the Andes of Peru, which offers a representative model for other glacier lakes...

Université de Fribourg

Partitioning the uncertainty of ensemble projections of global glacier mass change

Marzeion, Ben ; Hock, Regine ; Anderson, Brian ; Bliss, Andrew ; Champollion, Nicolas ; Fujita, Koji ; Huss, Matthias ; Immerzeel, Walter W. ; Kraaijenbrink, Philip ; Malles, Jan‐Hendrik ; Maussion, Fabien ; Radić, Valentina ; Rounce, David R. ; Sakai, Akiko ; Shannon, Sarah ; Wal, Roderik ; Zekollari, Harry

In: Earth’s Future, 2020, vol. 8, no. 7, p. -

Glacier mass loss is recognized as a major contributor to current sea level rise. However, large uncertainties remain in projections of glacier mass loss on global and regional scales. We present an ensemble of 288 glacier mass and area change projections for the 21st century based on 11 glacier models using up to 10 general circulation models and four Representative Concentration Pathways...

Université de Fribourg

The impact of climate change and glacier mass loss on the hydrology in the Mont-Blanc massif

Laurent, Léa ; Buoncristiani, Jean‑François ; Pohl, Benjamin ; Zekollari, Harry ; Farinotti, Daniel ; Huss, Matthias ; Mugnier, Jean‑Louis ; Pergaud, Julien

In: Scientific Reports, 2020, vol. 10, no. 1, p. 10420

The Mont-Blanc massif, being iconic with its large glaciers and peaks of over 4,000 m, will experience a sharp increase in summer temperatures during the twenty-first century. By 2100, the impact of climate change on the cryosphere and hydrosphere in the Alps is expected to lead to a decrease in annual river discharge. In this work, we modelled the twenty-first century evolution of runoff in...

Université de Fribourg

Glacier runoff variations since 1955 in the Maipo River basin, in the semiarid Andes of central Chile

Ayala, Álvaro ; Farías-Barahona, David ; Huss, Matthias ; Pellicciotti, Francesca ; McPhee, James ; Farinotti, Daniel

In: The Cryosphere, 2020, vol. 14, no. 6, p. 2005–2027

As glaciers adjust their size in response to climate variations, long-term changes in meltwater production can be expected, affecting the local availability of water resources. We investigate glacier runoff in the period 1955–2016 in the Maipo River basin (4843 km2, 33.0–34.3∘ S, 69.8–70.5∘ W), in the semiarid Andes of Chile. The basin contains more than 800 glaciers, which...