Browsing Norwegian Geotechnical Institute (NGI) Digital Archive by Author "Frauenfelder, Regula"

Now showing items 1-20 of 38

    • All-weather avalanche activity monitoring from space? 

      Bühler, Yves; Bieler, Claudia; Pielmeier, Christine; Wiesmann, Andreas; Caduff, Rafael; Frauenfelder, Regula; Jaedicke, Christian; Bippus, Gabriele (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2014)
      Information on avalanche activity or on non-activity on local and regional scale is of great value for avalanche warning services, traffic authorities and experts responsible for safety in communities or ski resorts. In ...

    • Analysis of an artificially triggered avalanche at the nepheline syenite mine on Stjernøya, Alta, Northern Norway 

      Frauenfelder, Regula; Jónsson, Árni; Lied, Karstein; Schwerdtfeger, Dirk; Bergum, Guro; Bühler, Yves; Stoffe, Lukas (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2014)
      Since 1961, a Nepheline Syenite mine is operated on the island of Stjernøya in the Altafjord, Northern Norway. The facilities are located in Lillebukt, on the southern side of the island. Above the facilities, the Nabbaren ...

    • Annual Report 2020 

      Gauer, Peter; Salazar, Sean; Robinson, Kate; Issler, Dieter; Frauenfelder, Regula; Langeland, Henrik; Liu, Zhongqiang; Domaas, Ulrik; Jaedicke, Christian; Gilbert, Graham (NGI-Rapport;20200017-02-R, Research report, 2021-03-19)
      During the first year of the project period 2020-2022 of NGIs research project on Snow avalanches, Applied Avalanche Research in Norway (AARN), work was conducted in all three work packages (WP 1 – Avalanche formation and ...

    • Annual Report 2021 

      Gauer, Peter; Salazar, Sean; Robinson, Kate; Issler, Dieter; Frauenfelder, Regula; Liu, Zhongqiang; Jaedicke, Christian; Gilbert, Graham (NGI-Rapport;20200017-03-R, Research report, 2022-04-08)
      During the second year of the project period 2020-2022 of NGIs research project on snow avalanches, Applied Avalanche Research in Norway (AARN), work was conducted in all three work packages (WP 1 – Avalanche formation and ...

    • Automated Avalanche Deposit Mapping From VHR Optical Imagery 

      Lato, Matthew J.; Frauenfelder, Regula; Bühler, Yves (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2012)
      Using eCognition we developed an algorithm to automatically detect and map avalanche deposits in Very High Resolution (VHR) optical remote sensing imagery acquired from satellites and airplanes. The algorithm relies on a ...

    • Automated detection of snow avalanche deposits: segmentation and classification of optical remote sensing imagery 

      Lato, Matt; Frauenfelder, Regula; Bühler, Y. (Journal article, 2012)

    • Avalanche debris detection using satellite-borne radar and optical remote sensing 

      Eckerstorfer, Markus; Malnes, Eirik; Frauenfelder, Regula; Domaas, Ulrik; Brattlien, Kjetil (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2014)
      The mountainous fjord landscape around Tromsø in Northern Norway is prone to high avalanche activity during the snow season. Large avalanches pose a hazard to infrastructure, such as buildings and roads, located between ...

    • The avalanche situation in a special winter. Review of the 09/10 season in Norway. 

      Jaedicke, Christian; Brattlien, Kjetil; Frauenfelder, Regula; Kristensen, Krister; Kronholm, Kalle (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2010)
      The 2009/10 season featured significantly different snow conditions compared to the usually maritime snow pack in most of Norway. A stable high-pressure system over large parts of Europe led to low temperatures and limited ...

    • Climate in Svalbard 2100 

      Bilt, Willem van der; Bakke, Jostein; Smedsrud, Lars H.; Sund, Monica; Schuler, Thomas; Westermann, Sebastian; Wong, Wai Kwok; Sandven, Stein; Simpson, Matthew James Ross; Skogen, Morten D.; Pavlova, O.; Ravndal, Ole; Risebrobakken, Bjørg; Saloranta, Tuomo; Mezghani, Abdelkader; Nilsen, F.; Nilsen, Jan Even Øie; Nilsen, Irene Brox; Kierulf, Halfdan; Kohler, Jack; Li, H.; Lutz, J; Melvold, Kjetil; Gjelten, Herdis Motrøen; Gundersen, Jeanette; Isaksen, Kjetil; Jaedicke, Christian; Dobler, Andreas; Engeset, Rune; Frauenfelder, Regula; Gerland, Sebastian; Christiansen, Hanne H; Børsheim, Knut Yngve; Breivik, Øyvind; Breili, Kristian; Borstad, Christopher Paul; Bogen, J.; Benestad, Rasmus; Beldring, S.; Andresen, J; Adakudlu, Muralidhar (Norwegian Centre for Climate Services Reports, Research report, 2019)

    • Consolidation of requirements - Analysis of questionnaire 

      Reutz, Elisabeth Hoffstad; Frauenfelder, Regula; Salazar, Sean (NGI Rapport;20190309-02-R, Report, 2022-11-08)
      This report presents a synthesis of the results of a questionnaire distributed to personnel from the Norwegian Public Roads Administration (NPRA) and several county road administrations. The aim of the survey was to evaluate ...

    • Could retrieval of snow layer formation by optical satellite remote sensing help avalanche forecasting? Presentation of first results 

      Solberg, Rune; Frauenfelder, Regula; Koren, Hans; Kronholm, Kalle (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2008)
      Of special interest within the field of avalanche research and avalanche warning are properties related to snow grain type and snow grain size at the surface. In continental and intermountain avalanche climates weak layers ...

    • Could retrieval of snow layer formation by optical satellite remote sensing help avalanche forecasting? Presentation of first results. 

      Solberg, Rune; Frauenfelder, Regula; Koren, Hans; Kronholm, Kalle (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2009)
      Of special interest within the field of avalanche research and avalanche warning are properties related to snow grain type and snow grain size at the surface. In continental and intermountain avalanche climates weak layers ...

    • DUE avalRS: Remote-Sensing Derived Avalanche Inventory Data for Decision Support and Hind-Cast after Avalanche Events 

      Frauenfelder, Regula; Kronholm, Kalle; Solberg, Rune; Larsen, Siri Øyen; Salberg, Arnt-Børre; Larsen, Jan Otto; Bjordal, Heidi (Chapter, 2010)
      Each year, snow avalanches hit populated areas and parts of the transport network in the Norwegian mountain regions, leading to loss of lives and the damaging of buildings and infrastructure. We present the results of a ...

    • Experiments with remote sensing in the context of avalanche warning and detection 

      Solberg, Rune; Frauenfelder, Regula; Larsen, Siri Øyen; Salberg, Arnt-Børre (Chapter, 2012)
      Two Norwegian projects carried out by NGI and NR have investigated and experimented with the potential of using remote sensing for avalanche warning and detection: The Norwegian Space Centre (NSC) supported project “Improved ...

    • The eye in the sky: Avalanche mapping from space 

      Frauenfelder, Regula; Glassett, Timothy D.; Jaedicke, Christian; Vöge, Malte; Robiati, Carlo (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2016)
      The Seward Highway in Alaska has over one hundred avalanche paths spread out along a 150 km major transportation corridor, which traverses three different avalanche climatic regimes. This coupled with a small staff can ...

    • Field test of UAS to support avalanche monitoring 

      Frauenfelder, Regula; Salazar, Sean; Dahle, Halgeir; Humstad, Tore; Solbakken, Emil; McCormack, Edward; Kirkhus, Trine; Moore, Richard; Dupuy, Bastien; Lorand, Pauline (Statens vegvesens rapporter;873, Report, 2022-11-08)
      I mars/april 2022 gjennomførte Statens vegvesen, Norges geotekniske institutt og SINTEF en felttest med UAS med ulike instrumenter på forskningsstasjonen Fonnbu i Stryn. Formålet med testen var å evaluere bruken av ...

    • First geophysical investigations to study a fragile Pomor cultural heritage site at Russekeila – Kapp Linné), Svalbard 

      Tavakoli, Saman; Nicu, Ionut Cristi; Frauenfelder, Regula; Gilbert, Graham L. (Peer reviewed; Journal article, 2023)
      With climate warming, the cultural heritage sites of the Arctic are in great danger. Extensive research is needed to study such sites. The archaeological site at Russekeila – Kapp Linné, Svalbard was selected for the survey ...

    • Geoelectrical properties of saline permafrost soil in the Adventdalen valley of Svalbard (Norway), constrained with in-situ well data 

      Tavakoli, Saman; Gilbert, Graham Lewis; Lysdahl, Asgeir Olaf Kydland; Frauenfelder, Regula; Forsberg, Cathinka Schaanning (Peer reviewed; Journal article, 2021)

    • Ground thermal and geomechanical conditions in a permafrost-affected high-latitude rock avalanche site (Polvartinden, northern Norway) 

      Frauenfelder, Regula; Isaksen, Ketil; Lato, Matthew; Noetzli, Jeannette (Peer reviewed; Journal article, 2018)
      On 26 June 2008, a rock avalanche detached in the northeast facing slope of Polvartinden, a high-alpine mountain in Signaldalen, northern Norway. Here, we report on the observed and modelled past and present near-surface ...

    • Hydrometeorological threshold conditions for debris flow initiation in Norway 

      Meyer, Nele Kristin; Dyrrdal, Anita Verpe; Frauenfelder, Regula; Etzelmuller, Bernd; Nadim, Farrokh (Journal article, 2012)
      Debris flows, triggered by extreme precipitation events and rapid snow melt, cause considerable damage to the Norwegian infrastructure every year. To define intensity-duration (ID) thresholds for debris flow initiation ...