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Université de Fribourg

Applicability of electrical resistivity tomography monitoring to coarse blocky and ice-rich permafrost landforms

Hilbich, Christin ; Marescot, L. ; Hauck, Christian ; Loke, M. H. ; Mäusbacher, R.

In: Permafrost and Periglacial Processes, 2009, vol. 20, no. 3, p. 269-284

The inversion and interpretation of electrical resistivity tomography (ERT) data from coarse blocky and ice-rich permafrost sites are challenging due to strong resistivity contrasts and high contact resistances. To assess temporal changes during ERT monitoring (ERTM), corresponding inversion artefacts have to be separated from true subsurface changes. Appraisal techniques serve to analyse an ERTM...

Université de Fribourg

Assessing the potential of soil moisture measurements for regional landslide early warning

Wicki, Adrian ; Lehmann, Peter ; Hauck, Christian ; Seneviratne, Sonia I. ; Waldner, Peter ; Stähli, Manfred

In: Landslides, 2020, p. -

In mountainous terrain, rainfall-induced landslides pose a serious risk to people and infrastructure. Regional landslide early warning systems (LEWS) have proven to be a cost-efficient tool to inform the public about the imminent landslide danger. While most operational LEWS are based on rainfall exceedance thresholds only, recent studies have demonstrated an improvement of the forecast...

Université de Fribourg

Automated time-lapse ert for improved process analysis and monitoring of frozen ground

Hilbich, Christin ; Fuss, C. ; Hauck, Christian

In: Permafrost and Periglacial Processes, 2011, vol. 22, no. 4, p. 306–319

A new automated electrical resistivity tomography (A-ERT) system is described that allows continuous measurements of the electrical resistivity distribution in high-mountain or polar terrain. The advantages of continuous resistivity monitoring, as opposed to single measurements at irregular time intervals, are illustrated using the permafrost monitoring station at the Schilthorn, Swiss Alps. Data...

Université de Fribourg

The Convective and Orographically-induced Precipitation Study (COPS): the scientific strategy, the field phase, and research highlights

Wulfmeyer, Volker ; Behrendt, Andreas ; Kottmeier, Christoph ; Corsmeier, Ulrich ; Barthlott, Christian ; Craig, George C. ; Hagen, Martin ; Althausen, Dietrich ; Aoshima, Fumiko ; Arpagaus, Marco ; Bauer, Hans-Stefan ; Bennett, Lindsay ; Blyth, Alan ; Brandau, Christine ; Champollion, Cédric ; Crewell, Susanne ; Dick, Galina ; Girolamo, Paolo Di ; Dorninger, Manfred ; Dufournet, Yann ; Eigenmann, Rafael ; Engelmann, Ronny ; Flamant, Cyrille ; Foken, Thomas ; Gorgas, Theresa ; Grzeschik, Matthias ; Handwerker, Jan ; Hauck, Christian ; Höller, Hartmut ; Junkermann, Wolfgang ; Kalthoff, Norbert ; Kiemle, Christoph ; Klink, Stefan ; König, Marianne ; Krauss, Liane ; Long, Charles N. ; Madonna, Fabio ; Mobbs, Stephen ; Neininger, Bruno ; Pal, Sandip ; Peters, Gerhard ; Pigeon, Grégoire ; Richard, Evelyne ; Rotach, Mathias W. ; Russchenberg, Herman ; Schwitalla, Thomas ; Smith, Victoria ; Steinacker, Reinhold ; Trentmann, Jörg ; Turner, David D. ; Baelen, Joel van ; Vogt, Siegfried ; Volkert, Hans ; Weckwerth, Tammy ; Wernli, Heini ; Wieser, Andreas ; Wirth, Martin

In: Quarterly Journal of the Royal Meteorological Society, 2011, vol. 137, no. S1, p. 1–348

Within the framework of the international field campaign COPS (Convective and Orographically-induced Precipitation Study), a large suite of state-of-the-art meteorological instrumentation was operated, partially combined for the first time. This includes networks of in situ and remote-sensing systems such as the Global Positioning System as well as a synergy of multi-wavelength passive and active...

Université de Fribourg

Degrading mountain permafrost in southern Norway: spatial and temporal variability of mean ground temperatures, 1999–2009

Isaksen, Ketil ; Ødegård, Rune Strand ; Etzelmüller, Bernd ; Hilbich, Christin ; Hauck, Christian ; Farbrot, Herman ; Eiken, Trond ; Hygen, Hans Olav ; Hipp, Tobias Florian

In: Permafrost and Periglacial Processes, 2011, vol. 22, no. 2, p. 361–377

A ten-year record (1999–2009) of annual mean ground surface temperatures (MGSTs) and mean ground temperatures (MGTs) was analysed for 16 monitoring sites in Jotunheimen and on Dovrefjell, southern Norway. Warming has occurred at sites with cold permafrost, marginal permafrost and deep seasonal frost. Ongoing permafrost degradation is suggested both by direct temperature monitoring and indirect...

Université de Fribourg

Detailed detection of active layer freeze-thaw dynamics using quasi-continuous electrical resistivity tomography (Deception Island, Antarctica)

Farzamian, Mohammad ; Vieira, Gonçalo ; Santos, Fernando A. Monteiro ; Tabar, Borhan Yaghoobi ; Hauck, Christian ; Paz, Maria Catarina ; Bernardo, Ivo ; Ramos, Miguel ; Pablo, Miguel Angel de

In: The Cryosphere, 2020, vol. 14, no. 3, p. 1105–1120

Climate-induced warming of permafrost soils is a global phenomenon, with regional and site-specific variations which are not fully understood. In this context, a 2-D automated electrical resistivity tomography (A-ERT) system was installed for the first time in Antarctica at Deception Island, associated to the existing Crater Lake site of the Circumpolar Active Layer Monitoring – South ...

Université de Fribourg

The European mountain cryosphere: a review of its current state, trends, and future challenges

Beniston, Martin ; Farinotti, Daniel ; Stoffel, Markus ; Andreassen, Liss M. ; Coppola, Erika ; Eckert, Nicolas ; Fantini, Adriano ; Giacona, Florie ; Hauck, Christian ; Huss, Matthias ; Huwald, Hendrik ; Lehning, Michael ; López-Moreno, Juan-Ignacio ; Magnusson, Jan ; Marty, Christoph ; Morán-Tejéda, Enrique ; Morin, Samuel ; Naaim, Mohamed ; Provenzale, Antonello ; Rabatel, Antoine ; Six, Delphine ; Stötter, Johann ; Strasser, Ulrich ; Terzago, Silvia ; Vincent, Christian

In: The Cryosphere, 2018, vol. 12, no. 2, p. 759–794

The mountain cryosphere of mainland Europe is recognized to have important impacts on a range of environmental processes. In this paper, we provide an overview on the current knowledge on snow, glacier, and permafrost processes, as well as their past, current, and future evolution. We additionally provide an assessment of current cryosphere research in Europe and point to the different...

Université de Fribourg

Influence of surface and subsurface heterogeneity on observed borehole temperatures at a mountain permafrost site in the Upper Engadine, Swiss Alps

Schneider, Sina ; Hoelzle, Martin ; Hauck, Christian

In: The Cryosphere, 2012, vol. 6, p. 517-531

Compared to lowland (polar) regions, permafrost in high mountain areas occurs in a large variety of surface and subsurface materials and textures. This work presents an eight-year (2002–2010) data set of borehole temperatures for five different (sub-) surface materials from a high alpine permafrost area, Murtèl-Corvatsch, Switzerland. The influence of the material on the thermal regime was...