Norges Geotekniske Institutt: Nye registreringer

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    • A synoptic climatology of major avalanche winters in Norway 

      Fitzharris, Blair; Bakkehøi, Steinar (Journal article, 1986)
      A near continuous record of avalanche deaths in Norway is compiled for 130 years from 1855, and shows a distinct downward trend, but large variations from winter to winter, with a periodicity of 12–13 years. Twelve major ...

    • Numerical runout simulation of debris avalanches in the Faroe Islands, North Atlantic Ocean 

      Dahl, Mads-Peter J; Gauer, Peter; Kalsnes, Bjørn; Mortensen, Lis E.; Jensen, Niels H.; Veihe, Anita (Journal article, 2012-08-31)
      The Faroe Islands in the North Atlantic Ocean are susceptible to flow-type landslides in coarse-grained highly organic colluvium. Following several hazardous debris avalanche events, research work has been initiated to ...

    • A contribution to the prediction of slush avalanches 

      Hestnes, Erik (Chapter, 1985)
      Slush avalanches, primarily known from uninhabited arctic and mountainous regions, every year cause damage to man and property in Norway. Seeking objective criteria to identify their hazard zones, and methods for their ...

    • Global warning reduces the consequences of slushflows 

      Hestnes, Erik; Bakkehøi, Steinar; Jaedicke, Christian (Chapter, 2017)
      Most recentpublicationson natural hazards, if they mention slushflows at all, state that their impact onmankind will increase. However, milder weather, shorter winters, less snow and rise of the snowline will mainly shift ...

    • 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 ...

    • Conclusions on the current status on avalanche modelling 

      Harbitz, Carl Bonnevie (Chapter, 1999)
      An examination of existing models shows that: (1) there is not - and probably never will be - a single model that adequately describes all avalanche types; (2) in order to account for the extraordinary variability of ...

    • Cross-comparison of Selected Avalanche Observations 

      Gauer, Peter (Chapter, 2019)
      In many mountainous regions, snow avalanches are severe threats to the population and their infrastructure. Delineation of avalanche endangered areas or the design of suffcient mitigation measures require in-depth understanding ...

    • Secondary Impacts of Climate Change on the Cryosphere - Chapter 5.1. Avalanches 

      Voigt, T.; Marty, C.; Dobesberger, P.; Fromm, R.; Solheim, Anders; Vojtek, M.; Rhyner, J.; Kronholm, K. (ETC/ACC Technical Paper;2010/13, Chapter, 2010)
      Key messages: • Average avalanche activity has not changed during the last decade, and climate change will only affect the lower altitudes • The event history of avalanches is extremely difficult to relate to climate ...

    • Estimating run-out distances for extreme snow avalanches 

      Norem, Harald; Bakkehøi, Steinar (Lecture, 1992)
      Lecture presented at the Universitè Européenne d'Eté. Neige et Avalanches, Chamonix 1992. Estimating the run-out distances for snow avalanches is an important task for land use planning in mountaneous areas. The practical ...

    • Norwegian demands on avalanche safety - legislation, quality policy and judicial practice 

      Hestnes, Erik (Lecture, 1991)
      The Building and Planning Act and the Working Environment Act both have demands concerning avalanche safety. The legal demands concerning avalanche safety were first established in the Building Act of 1924. The act was put ...

    • A set of codes for numerical convection and geodynamo calculations 

      Gibbons, Steven John; Willis, A.P.; Davies, C.; Gubbins, D. (Journal article, 2023)
      We present a set of codes for calculating and displaying solutions to diverse problems within thermal convection and magnetic field generation in rotating fluid-filled spheres and spherical shells. There are diverse programs ...

    • Research Plan 2020–2022 

      Issler, Dieter; Jaedicke, Christian; Gauer, Peter; Gisnås, Kjersti; Frauenfelder, Regula; Salazar, Sean (NGI-Rapport;20200017-01-R, Research report, 2020-04-23)
      Snow avalanches are a significant natural hazard and common phenomenon in Norway. Each year, avalanches result in fatalities, evacuations, and interruptions or damage to infrastructure networks such as roads, railways, and ...

    • A Simple Model for the Variability of Release Area Size 

      Issler, Dieter (NGI-Rapport;20200017‐03‐TN, Research report, 2023-08-24)
      The hazard mapping tool NAKSIN estimates the release probability of potential release areas (PRAs) by testing a stability criterion based on the infinite-slope approximation with a large sample of synthetic weather situations. ...

    • 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 ...

    • APALI – Avalanche Probability Along Linear Infrastructure 

      Issler, Dieter (NGI-Rapport;20200431‐01‐TN, Research report, 2023-09-28)
      To secure linear infrastructure in the most cost-efficient manner, hazard hot-spots need to be known not only with regard to the intensity of possible events but also their probability. Traditional hazard mapping methods ...

    • CPT 3 – Quantitative risk assessment: Remarks on the uncertainty in the delimitation of hazard zones based on historical observations 

      Gauer, Peter (NGI-Rapport;20200017-09-TN, Research report, 2022-03-22)
      The Norwegian building code regulates the societal acceptable risk from avalanches for three building classes (S1, S1, and S3). The corresponding highest allowed nominal annual probabilities of avalanches reaching the ...

    • Accoustic snow drift measurements: Experiences from the FlowCapt instrument 

      Jaedicke, Christian (Journal article, 2001)
      Three acoustic FlowCapt™ (IAV Engineering) drifting snow instruments were deployed during the 1999 and 2000 field season on Spitsbergen, Norway. Three different experiments were carried out to test the instruments for their ...

    • Looking Beyond the Powder/Dense FlowAvalanche Dichotomy 

      Faug, Thierry; Turnbull, Barbara; Gauer, Peter (Journal article, 2018-03-04)
      Köhler et al. (2018, https://doi.org/10.1002/2017JF004375) deploy a high spatial and temporal resolution GEODAR radar system to reveal the inside of snow avalanches over the entire slope. They detect a rich variety of ...

    • WP 2 – Full-scale experiments at Ryggfonn Ryggfonn avalanche observations 2019/2020 

      Gauer, Peter; Langeland, Henrik (NGI-Rapport;20200017-05-TN, Research report, 2021-03-22)
      NGI is operating the avalanche test site at Ryggfonn in Stryn municipality, Vestland county, western Norway (61.969°N, 7.275°E) since early 1980s. In addition to the field work and data collection in frame work of WP2, ...

    • 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 ...