Perfeziona i miei risultati

Document type

Collection spécifique

Lingua

Université de Fribourg

Continuous and autonomous snow water equivalent measurements by a cosmic ray sensor on an alpine glacier

Gugerli, Rebecca ; Salzmann, Nadine ; Huss, Matthias ; Desilets, Darin

In: The Cryosphere, 2019, vol. 13, no. 12, p. 3413–3434

Snow water equivalent (SWE) measurements of seasonal snowpack are crucial in many research fields. Yet accurate measurements at a high temporal resolution are difficult to obtain in high mountain regions. With a cosmic ray sensor (CRS), SWE can be inferred from neutron counts. We present the analyses of temporally continuous SWE measurements by a CRS on an alpine glacier in Switzerland...

Université de Fribourg

Recent glacier and lake changes in High Mountain Asia and their relation to precipitation changes

Treichler, Désirée ; Kääb, Andreas ; Salzmann, Nadine ; Xu, Chong-Yu

In: The Cryosphere, 2019, vol. 13, no. 11, p. 2977–3005

We present an updated, spatially resolved estimate of 2003–2008 glacier surface elevation changes for the entire region of High Mountain Asia (HMA) from ICESat laser altimetry data. The results reveal a diverse pattern that is caused by spatially greatly varying glacier sensitivity, in particular to precipitation availability and changes. We introduce a spatially resolved zonation where...

Université de Fribourg

Climate change research in bilateral development programmes: experiences from India and Peru

Muccione, Veruska ; Orlowsky, Boris ; Allen, Simon K. ; Huggel, Christian ; Salzmann, Nadine ; Montoya, Nilton ; Randhawa, Surjeet Singh ; Stoffel, Markus

In: Development in Practice, 2019, vol. 29, no. 3, p. 336–348

This article reflects on the merits and shortfalls of bilateral research programmes aimed at strengthening climate change research capabilities, using the experience from two programmes, the PACC and IHCAP in Peru and India, respectively. The study highlights key aspects of these types of bilateral programmes, namely: capacity; performance, salary and appreciation; funding; bureaucracy and...

Université de Fribourg

Comparison of climatic trends and variability among glacierized environments in the Western Himalayas

Dimri, A. P. ; Immerzeel, W. W. ; Salzmann, Nadine ; Thayyen, R. J.

In: Theoretical and Applied Climatology, 2018, vol. 134, no. 1, p. 155–163

The climate and hydrology of the Western Himalayas is complex and a function of snow and glacier melt, land use, topography, and Indian summer and winter monsoon dynamics. Improving our knowledge about these processes is important from societal and agricultural points of view. In this study, an observational analysis is carried out to assess the changing climatic trends and the associated...

Université de Fribourg

Rapid decline of snow and ice in the tropical Andes – Impacts, uncertainties and challenges ahead

Vuille, Mathias ; Carey, Mark ; Huggel, Christian ; Buytaert, Wouter ; Rabatel, Antoine ; Jacobsen, Dean ; Soruco, Alvaro ; Villacis, Marcos ; Yarleque, Christian ; Timm, Oliver Elison ; Condom, Thomas ; Salzmann, Nadine ; Sicart, Jean-Emmanuel

In: Earth-Science Reviews, 2018, vol. 176, p. 195–213

Glaciers in the tropical Andes have been retreating for the past several decades, leading to a temporary increase in dry season water supply downstream. Projected future glacier shrinkage, however, will lead to a long-term reduction in dry season river discharge from glacierized catchments. This glacier retreat is closely related to the observed increase in high-elevation, surface air...

Université de Fribourg

Re-establishing glacier monitoring in Kyrgyzstan and Uzbekistan, Central Asia

Hoelzle, Martin ; Azisov, Erlan ; Barandun, Martina ; Huss, Matthias ; Farinotti, Daniel ; Gafurov, Abror ; Hagg, Wilfried ; Kenzhebaev, Ruslan ; Kronenberg, Marlene ; Machguth, Horst ; Merkushkin, Alexandr ; Moldobekov, Bolot ; Petrov, Maxim ; Saks, Tomas ; Salzmann, Nadine ; Schöne, Tilo ; Tarasov, Yuri ; Usubaliev, Ryskul ; Vorogushyn, Sergiy ; Yakovlev, Andrey ; Zemp, Michael

In: Geoscientific Instrumentation, Methods and Data Systems, 2017, vol. 6, no. 2, p. 397–418

Glacier mass loss is among the clearest indicators of atmospheric warming. The observation of these changes is one of the major objectives of the international climate monitoring strategy developed by the Global Climate Observing System (GCOS). Long-term glacier mass balance measurements are furthermore the basis for calibrating and validating models simulating future runoff of glacierised...

Université de Fribourg

The freezing level in the tropical Andes, Peru: An indicator for present and future glacier extents: the freezing level in the tropical Andes

Schauwecker, Simone ; Rohrer, Mario ; Huggel, Christian ; Endries, Jason ; Montoya, Nilton ; Neukom, Raphael ; Perry, Baker ; Salzmann, Nadine ; Schwarb, Manfred ; Suarez, Wilson

In: Journal of Geophysical Research: Atmospheres, 2017, vol. 122, no. 10, p. 5172–5189

Along with air temperatures, the freezing level height (FLH) has risen over the last decades. The mass balance of tropical glaciers in Peru is highly sensitive to a rise in the FLH, mainly due to a decrease in accumulation and increase of energy for ablation caused by reduced albedo. Knowledge of future changes in the FLH is thus crucial to estimating changes in glacier extents. Since in situ...

Université de Fribourg

Glacier monitoring and capacity building: important ingredients for sustainable mountain development

Nussbaumer, Samuel U. ; Hoelzle, Martin ; Hüsler, Fabia ; Huggel, Christian ; Salzmann, Nadine ; Zemp, Michael

In: Mountain Research and Development, 2017, vol. 37, no. 1, p. 141–152

Glacier observation data from major mountain regions of the world are key to improving our understanding of glacier changes: they deliver fundamental baseline information for climatological, hydrological, and hazard assessments. In many mountain ecosystems, as well as in the adjacent lowlands, glaciers play a crucial role in freshwater provision and regulation. This article first presents the...

Université de Fribourg

Scientific knowledge and knowledge needs in climate adaptation policy: a case study of diverse mountain regions

Muccione, Veruska ; Salzmann, Nadine ; Department of Geosciences, University of Fribourg, Switzerland ; Huggel, Christian

In: Mountain Research and Development, 2016, vol. 36, no. 3, p. 364–375

Mountain ecosystems around the world are recognized to be among the most vulnerable to the impacts of climate change. The need to develop sound adaptation strategies in these areas is growing. Knowledge from the natural sciences has an important role to play in the development of adaptation strategies. However, the extent of and gaps in such knowledge have not been systematically investigated...