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Université de Fribourg

Re-analysis of seasonal mass balance at Abramov glacier 1968–2014

Barandun, Martina ; Huss, Matthias ; Sold, Leo ; Farinotti, Daniel ; Azisov, Erlan ; Salzmann, Nadine ; Usubaliev, Ryskul ; Merkushkin, Alexandr ; Hoelzle, Martin

In: Journal of Glaciology, 2015, vol. 61, no. 230, p. 1103–1117

Abramov glacier, located in the Pamir Alay, Kyrgyzstan, is a reference glacier within the Global Terrestrial Network for Glaciers. Long-term glaciological measurements exist from 1968 to 1998 and a mass-balance monitoring programme was re-established in 2011. In this study we re-analyse existing mass-balance data and use a spatially distributed mass-balance model to provide continuous seasonal...

Université de Fribourg

A new model for global glacier change and sea-level rise

Huss, Matthias ; Hock, Regine

In: Cryospheric Sciences, 2015, p. 54

The anticipated retreat of glaciers around the globe will pose far-reaching challenges to the management of fresh water resources and significantly contribute to sea-level rise within the coming decades. Here, we present a new model for calculating the twenty-first century mass changes of all glaciers on Earth outside the ice sheets. The Global Glacier Evolution Model (GloGEM) includes mass loss...

Université de Fribourg

New long-term mass-balance series for the Swiss Alps

Huss, Matthias ; Dhulst, Laurie ; Bauder, Andreas

In: Journal of Glaciology, 2015, vol. 61, no. 227, p. 551–562

In this study we present 19 new or re-analysed series of glacier-wide seasonal mass balance for the Swiss Alps based on direct measurements. The records partly start around 1920 and continue until today. Previously unpublished and unevaluated observations of point winter and annual balance are compiled from various sources and archives. These highly valuable datasets have not yet been...

Université de Fribourg

Ice thickness measurements and volume estimates for glaciers in Norway

Andreassen, l.M. ; Huss, Matthias ; Melvold, K. ; Elvehøy, H. ; Winsvold, S. H.

In: Journal of Glaciology, 2015, vol. 61, no. 228, p. 763–775

Glacier volume and ice thickness distribution are important variables for water resource management in Norway and the assessment of future glacier changes. We present a detailed assessment of thickness distribution and total glacier volume for mainland Norway based on data and modelling. Glacier outlines from a Landsat-derived inventory from 1999 to 2006 covering an area of 2692 ± 81 km² were...

Université de Fribourg

The impact of Saharan dust and black carbon on albedo and long-term mass balance of an Alpine glacier

Gabbi, J. ; Huss, Matthias ; Bauder, Andreas ; Cao, F. ; Schwikowski, M.

In: The Cryosphere, 2015, vol. 9, no. 4, p. 1385–1400

Light-absorbing impurities in snow and ice control glacier melt as shortwave radiation represents the main component of the surface energy balance. Here, we investigate the long-term effect of snow impurities, i.e., mineral dust and black carbon (BC), on albedo and glacier mass balance. The analysis was performed over the period 1914–2014 for two sites on Claridenfirn, Swiss Alps, where an...

Université de Fribourg

Integrating a glacier retreat model into a hydrological model – Case studies of three glacierised catchments in Norway and Himalayan region

Li, Hong ; Beldring, Stein ; Xu, C.-Y. ; Huss, Matthias ; Melvold, Kjetil ; Jain, Sharad K.

In: Journal of Hydrology, 2015, vol. 527, p. 656–667

Glaciers are crucial in many countries where meltwater from glaciers is an important source of water for drinking water supply, irrigation, hydropower generation and the ecological system. Glaciers are also important indicators of climate change. They have been significantly altered due to the global warming and have subsequently affected the regional hydrological regime. However, few models are...

Université de Fribourg

Surface elevation and mass changes of all Swiss glaciers 1980–2010

Fischer, Mauro ; Huss, Matthias ; Hoelzle, Martin

In: The Cryosphere, 2015, vol. 9, no. 2, p. 525–540

Since the mid-1980s, glaciers in the European Alps have shown widespread and accelerating mass losses. This article presents glacier-specific changes in surface elevation, volume and mass balance for all glaciers in the Swiss Alps from 1980 to 2010. Together with glacier outlines from the 1973 inventory, the DHM25 Level 1 digital elevation models (DEMs) for which the source data over...

Université de Fribourg

Variations in Alaska tidewater glacier frontal ablation, 1985–2013

McNabb, R. W. ; Hock, Regine ; Huss, Matthias

In: Journal of Geophysical Research: Earth Surface, 2015, vol. 120, no. 1, p. 2014JF003276

Our incomplete knowledge of the proportion of mass loss due to frontal ablation (the sum of ice loss through calving and submarine melt) from tidewater glaciers outside of the Greenland and Antarctic ice sheets has been cited as a major hindrance to accurate predictions of global sea level rise. We present a 28 year record (1985–2013) of frontal ablation for 27 Alaska tidewater glaciers...

Université de Fribourg

Runaway thinning of the low-elevation Yakutat Glacier, Alaska, and its sensitivity to climate change

Trüssel, Barbara L. ; Truffer, Martin ; Hock, Regine ; Motyka, Roman J. ; Huss, Matthias ; Zhang, Jing

In: Journal of Glaciology, 2015, vol. 61, no. 225, p. 65 - 75

Lake-calving Yakutat Glacier in southeast Alaska, USA, is undergoing rapid thinning and terminus retreat. We use a simplified glacier model to evaluate its future mass loss. In a first step we compute glacier-wide mass change with a surface mass-balance model, and add a mass loss component due to ice flux through the calving front. We then use an empirical elevation change curve to adjust for...

Université de Fribourg

Estimating the volume of glaciers in the Himalayan–Karakoram region using different methods

Frey, H. ; Machguth, Horst ; Huss, Matthias ; Huggel, C. ; Bajracharya, S. ; Bolch, T. ; Kulkarni, A. ; Linsbauer, Andreas ; Salzmann, Nadine ; Stoffel, Markus

In: The Cryosphere, 2014, vol. 8, no. 6, p. 2313–2333

Ice volume estimates are crucial for assessing water reserves stored in glaciers. Due to its large glacier coverage, such estimates are of particular interest for the Himalayan–Karakoram (HK) region. In this study, different existing methodologies are used to estimate the ice reserves: three area–volume relations, one slope-dependent volume estimation method, and two ice-thickness...