Université de Fribourg

A database of worldwide glacier thickness observations

Gärtner-Roer, I. ; Naegeli, K. ; Huss, Matthias ; Knecht, T. ; Machguth, Horst ; Zemp, Michael

In: Global and Planetary Change, 2014, vol. 122, p. 330–344

One of the grand challenges in glacier research is to assess the total ice volume and its global distribution. Over the past few decades the compilation of a world glacier inventory has been well-advanced both in institutional set-up and in spatial coverage. The inventory is restricted to glacier surface observations. However, although thickness has been observed on many glaciers and ice caps...

Université de Fribourg

The length of the world’s glaciers – a new approach for the global calculation of center lines

Machguth, Horst ; Huss, Matthias

In: The Cryosphere, 2014, vol. 8, no. 5, p. 1741–1755

Glacier length is an important measure of glacier geometry. Nevertheless, global glacier inventories are mostly lacking length data. Only recently semi-automated approaches to measure glacier length have been developed and applied regionally. Here we present a first global assessment of glacier length using an automated method that relies on glacier surface slope, distance to the glacier margins...

Université de Fribourg

The Swiss Alpine glaciers' response to the global '2 °C air temperature target'

Salzmann, Nadine ; Machguth, Horst ; Linsbauer, Andreas

In: Environmental Research Letters, 2012, vol. 7, no. 4, p. 044001

While there is general consensus that observed global mean air temperature has increased during the past few decades and will very likely continue to rise in the coming decades, the assessment of the effective impacts of increased global mean air temperature on a specific regional-scale system remains highly challenging. This study takes up the widely discussed concept of limiting global mean...

Université de Fribourg

Calculating distributed glacier mass balance for the Swiss Alps from regional climate model output: A methodical description and interpretation of the results

Machguth, Horst ; Paul, Frank ; Kotlarski, Sven ; Hoelzle, Martin

In: Journal of Geophysical Research, 2009, vol. 114, p. D19106

This study aims at giving a methodical description of the use of gridded output from a regional climate model (RCM) for the calculation of glacier mass balance distribution for the perimeter of the Swiss Alps. The mass balance model runs at daily steps and 100 m spatial resolution, while the regional model (REMO) RCM provides daily grids (∼18 km resolution) of dynamically downscaled reanalysis...