Research
- Terrain driven mesoscale circulations. Sea breeze and upslope/downslope winds
- Orogragraphically modified flows. Gravity waves and downslope windstorms
- Utilization of unmanned aerial vehicles
Teaching
Teaching assistant in GEOF-301: “An introduction to master’s studies”.
Teaching assistant in GEOF-110: ”Introduction to atmosphere-ocean dynamics”.
Teaching assistant in GEOF-320: ”Dynamics of the atmosphere I”.
Lecturer in GEOF-120: "Meteorology"
Publications
Academic article
- Lukas Frank; Jon Albretsen; Ragnheid Skogseth et al. (2025). Mechanisms of warm-water intrusions onto the West Spitsbergen Shelf during winter. (external link)
- Marius Opsanger Jonassen; Haraldur Ólafsson; Hálfdán Ágústsson et al. (2012). Improving high-resolution numerical weather simulations by assimilating data from an unmanned aerial system. (external link)
- Birthe Marie Rødssæteren Steensen; Haraldur Ólafsson; Marius Opsanger Jonassen (2011). An extreme precipitation event in Central Norway. (external link)
- Aurora Tegnér Stenmark; Lars R Hole; Paul Voss et al. (2014). The influence of nunataks on atmospheric boundary layer convection during summer in Dronning Maud Land, Antarctica. (external link)
- Stephan Kral; Joachim Reuder; Timo Pekka Vihma et al. (2021). The Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer Project (ISOBAR) — Unique fine-scale observations under stable and very stable conditions. (external link)
- Stephan Kral; Joachim Reuder; Timo Vihma et al. (2018). Innovative strategies for observations in the Arctic atmospheric boundary layer (ISOBAR)—The Hailuoto 2017 Campaign. (external link)
- Malte Müller; Jean Rabault; Chiara de Geeter et al. (2025). Svalbard Marginal Ice Zone 2024: A distributed network of temperature, waves, and sea ice drift observations. (external link)
- Rafael Kenji Horota; Kim Senger; Aleksandra Anna Smyrak-Sikora et al. (2024). VRSvalbard – a photosphere-based atlas of a high Arctic geo-landscape. (external link)
- Marius Opsanger Jonassen; Haraldur Ólafsson; Joachim Reuder et al. (2012). Multi-scale variability of winds in the complex topography of southwestern Norway. (external link)
- Marius Opsanger Jonassen; Ilona Valisuo; Timo Vihma et al. (2019). Assessment of Atmospheric Reanalyses With Independent Observations in the Weddell Sea, the Antarctic. (external link)
- Marius Opsanger Jonassen; Haraldur Ólafsson; Aslaug Skålevik Valved et al. (2013). Simulations of the Bergen orographic wind shelter. (external link)
- Hálfdán Ágústsson; Haraldur Ólafsson; Marius Opsanger Jonassen et al. (2014). The impact of assimilating data from a remotely piloted aircraft on simulations of weak-wind orographic flow. (external link)
- Teresa Maaria Remes; Patrick Stoll; Yurii Batrak et al. (2020). Evaluation of a sub-kilometre NWP system in an Arctic fjord-valley system in winter. (external link)
- Joachim Reuder; Line Båserud; Marius Opsanger Jonassen et al. (2016). Exploring the potential of the RPA system SUMO for multipurpose boundary-layer missions during the BLLAST campaign. (external link)
- Line Båserud; Joachim Reuder; Marius Opsanger Jonassen et al. (2019). Potential and limitations in estimating sensible-heat-flux profiles from consecutive temperature profiles using remotely-piloted aircraft systems. (external link)
- Joan Cuxart; Burkhard Wrenger; Daniel Martínez-Villagrasa et al. (2016). Estimation of the advection effects induced by surface heterogeneities in the surface energy budget. (external link)
- Joachim Reuder; Pascal Brisset; Marius Opsanger Jonassen et al. (2008). SUMO: A Small Unmanned Meteorological Observer for atmospheric boundary layer research. (external link)
- Laura Mack; Marvin Kähnert; Quentin Rauschenbach et al. (2025). Stable Boundary Layers in an Arctic Fjord-Valley System: Evaluation of Temperature Profiles Observed From Fiber-Optic Distributed Sensing and Comparison to Numerical Weather Prediction Systems at Different Resolutions. (external link)
- Stephanie Mayer; Gautier Hattenberger; Pascal Brisset et al. (2012). A ´no-flow-sensor` wind estimation algorithm for Unmanned Aerial Systems. (external link)
- Daniel Kramer; Marius Opsanger Jonassen; Kim Senger et al. (2025). The use of Gaming and Geodata Visualisation in Preparation for High Arctic Research Fieldwork. (external link)
- Qizhen Sun; Timo Vihma; Marius Opsanger Jonassen et al. (2020). Impact of Assimilation of Radiosonde and UAV Observations from the Southern Ocean in the Polar WRF Model. (external link)
- Siiri Wickström; Marius Opsanger Jonassen; John J. Cassano et al. (2020). Present Temperature, Precipitation, and Rain‐on‐Snow Climate in Svalbard. (external link)
- Joachim Reuder; Marius Opsanger Jonassen (2012). First results of turbulence measurements in a wind park with the Small Unmanned Meteorological Observer SUMO. (external link)
- Lukas Frank; Marius Opsanger Jonassen; Teresa Maaria Remes et al. (2023). IWIN: the Isfjorden Weather Information Network. (external link)
- Marius Opsanger Jonassen; Hálfdán Ágústsson; Haraldur Ólafsson (2014). Impact of surface characteristics on flow over a mesoscale mountain. (external link)
- Joachim Reuder; Pascal Brisset; Marius Opsanger Jonassen et al. (2009). The Small Unmanned Meteorological Observer SUMO: A new tool for atmospheric boundary layer research. (external link)
- Stephanie Mayer; Anne Dagrun Sandvik; Marius Opsanger Jonassen et al. (2012). Atmospheric profiling with the UAS SUMO: A new perspective for the evaluation of fine-scale atmospheric models. (external link)
- Rafael Kenji Horota; Kim Senger; Nil Rodes et al. (2023). West Spitsbergen fold and thrust belt: A digital educational data package for teaching structural geology. (external link)
- Mathias Tollinger; Alexander Gohm; Marius Opsanger Jonassen (2019). Unravelling the March 1972 northwest Greenland windstorm with high-resolution numerical simulations. (external link)
- Line Båserud; Joachim Reuder; Marius Opsanger Jonassen et al. (2016). Proof of concept for turbulence measurements with the RPAS SUMO during the BLLAST campaign. (external link)
- Lukas Frank; Marius Opsanger Jonassen; Ragnheid Skogseth et al. (2023). Atmospheric Climatologies Over Isfjorden, Svalbard. (external link)
- Ole Arve Misund; Marius Opsanger Jonassen; Jan Otto Larsen (2025). The Snow Avalanches That Hit Longyearbyen in 2015 and 2017 Led to Better Forecasts and Physical Barriers. (external link)
- Stephanie Mayer; Marius Opsanger Jonassen; Anne Dagrun Sandvik et al. (2012). Profiling the arctic stable boundary layer in Advent Valley, Svalbard : measurements and simulations. (external link)
- Joachim Reuder; Markus Ablinger; Hálfdán Ágústsson et al. (2012). FLOHOF 2007: an overview of the mesoscale meteorological field campaign at Hofsjokull, Central Iceland. (external link)
- Joachim Reuder; Marius Opsanger Jonassen; Haraldur Ólafsson (2012). The small unmanned meteorological observer SUMO: recent developments and applications of a micro-UAS for atmospheric boundary layer research. (external link)
- Lukas Frank; Marius Opsanger Jonassen; Ragnheid Skogseth et al. (2025). Air–sea–ice interactions in Isfjorden, Svalbard: An atmospheric perspective. (external link)
- Marius Opsanger Jonassen; Tiina Nygård; Timo Pekka Vihma (2021). Evaluation of three numerical weather prediction models for the Weddell Sea region for the Austral winter 2013. (external link)
- Marie Lothon; Fabienne Louhou; David Pino et al. (2014). The BLLAST field experiment: Boundary-Layer late afternoon and sunset turbulence. (external link)
- Siiri Wickström; Marius Opsanger Jonassen; Timo Pekka Vihma et al. (2019). Trends in cyclones in the high-latitude North Atlantic during 1979-2016. (external link)
- Maxime Grandin; Vincent E. Ledvina; Sophie Musset et al. (2025). Citizen Science in Space and Atmospheric Sciences: Opportunities and Challenges. (external link)
- R Skogseth; L.L.A. Olivier; Frank Nilsen et al. (2020). Variability and decadal trends in the Isfjorden (Svalbard) ocean climate and circulation – An indicator for climate change in the European Arctic. (external link)
Conference poster
- Marius Opsanger Jonassen; Joachim Reuder (2008). Determination of temperature and humidity profiles in the atmospheric boundary layer by fast ascending UAVs. (external link)
- Stephan T. Kral; Joachim Reuder; Stephanie Mayer et al. (2016). The ISOBAR project (2016–2018) – Observations on the stable polar Atmospheric Boundary Layer from Remotely Piloted Aircraft Systems. (external link)
- Stephan T. Kral; Marius Opsanger Jonassen; Joachim Reuder et al. (2016). SUMO operations in harsh environments. (external link)
- Stephan T. Kral; Joachim Reuder; Line Båserud et al. (2016). SUMO operation during the BLLAST campaign - Experiences and results. (external link)
- Joachim Reuder; Marius Opsanger Jonassen; Haraldur Ólafsson (2012). The Small Unmanned Meteorological Observer SUMO: Recent developments and applications of a Micro-UAS for atmospheric boundary layer research. (external link)
- Andrew Walter Seidl; Aina Marie Johannessen; Alena Dekhtyareva et al. (2021). Stable water isotopes in evaporation and precipitation during the ISLAS2020 field campaign, 20Feb-24Mar 2020. (external link)
- Alena Dekhtyareva; Marion Maturilli; Kerstin Ebell et al. (2021). Cloud microphysical processes during ISLAS 2020 campaign in Ny-Ålesund. (external link)
- Marius Opsanger Jonassen; Haraldur Ólafsson; Joachim Reuder et al. (2011). Multi-scale variability of winds in the complex topography of Southwestern Norway. (external link)
- Marius Opsanger Jonassen; Haraldur Ólafsson; Jan Asle Olseth et al. (2010). Observations of the Bergen Orographic Shelter. (external link)
- Sebastian Sikora; Hanne H. Christiansen; Stefan Claes et al. (2023). Svalbard Environment Monitoring System at UNIS. (external link)
- Aslaug Skålevik Valved; Joachim Reuder; Marius Opsanger Jonassen et al. (2012). Local variability of winds in the complex terrain of the Bergen area during the great windstorms of November and December 2011. (external link)
- Alexander Rautenberg; Stephan Kral; Joachim Reuder et al. (2018). Wind and Turbulence Measurements with RPA during the ISOBAR Campaign 2017. (external link)
- Stephanie Mayer; Marius Opsanger Jonassen; Anne Dagrun Sandvik et al. (2009). The meteorological UAV SUMO: A new perspective for the evaluation of atmospheric boundary layer schemes in fine-scale atmospheric models. (external link)
- Marius Opsanger Jonassen; Haraldur Ólafsson; Joachim Reuder et al. (2011). Spatial variability of winds at the mountainous west coast of Norway. (external link)
- Simen Salomonsen Hjelle; Tina Dahl; Peter Betlem et al. (2023). Cross disciplinary digital toolbox for teaching, learning and research activities in the Arctic. (external link)
- Marius Opsanger Jonassen; Stephan T. Kral; Siiri Wickström et al. (2016). Observations on the Arctic Boundary Layer using the Small Unmanned Meteorological Observer (SUMO) during polar night. (external link)
- Marius Opsanger Jonassen; Haraldur Ólafsson; Joachim Reuder et al. (2012). Numerical analysis of local acceleration and deceleration of atmospheric flow during a windstorm in the Bergen area. (external link)
- Stephanie Mayer; Marius Opsanger Jonassen; Joachim Reuder (2012). The Unmanned Aerial System SUMO: an alternative measurement tool for polar boundary layer studies. (external link)
- Stephanie Mayer; Marius Opsanger Jonassen; Joachim Reuder et al. (2010). Investigating the early springtime stable atmospheric boundary layer in Adventdalen (Spitsbergen). (external link)
- Marius Opsanger Jonassen; Stephan T. Kral (2016). UAVs in the Iceland Sea Project. (external link)
- Joachim Reuder; Marius Opsanger Jonassen (2012). The potential of micro-UAS for turbulence measurement in wind parks. (external link)
Conference lecture
- Alexander Rautenberg; Stephan Kral; Joachim Reuder et al. (2018). Wind and Turbulence Measurements with RPA during the ISOBAR Campaign. (external link)
- Joachim Reuder; Pascal Brisset; Marius Opsanger Jonassen et al. (2008). SUMO: A Small Unmanned Meteorological observer for atmospheric boundary layer research. (external link)
- Joachim Reuder; Marius Opsanger Jonassen; Stephanie Mayer et al. (2008). SUMO: A Small Unmanned Meteorological Observer for atmospheric boundary layer research. (external link)
- Phillip Chilson; Jennifer Handsley; Brandon Centeneo et al. (2016). An Evaluation of Wind Measurements From SUMO Collected During the BLLAST Campaign. (external link)
- Joachim Reuder; Stephan Kral; Line Båserud et al. (2018). The Two ISOBAR Stable Boundary Layer Field Campains at Hailuoto, Finland in 2017 and 2018: Experimental Setup and First Results. (external link)
- Stephan Kral; Joachim Reuder; Line Båserud et al. (2018). RPAS observation on the structure and evolution of the Atmospheric Boundary Layer during the two ISOBAR field campaigns on Hailuoto, 2017 and 2018. (external link)
- Stephanie Mayer; Marius Opsanger Jonassen; Joachim Reuder (2009). Simultaneous profiling of the Arctic Atmospheric Boundary Layer. (external link)
- Line Båserud; Joachim Reuder; Marius Opsanger Jonassen et al. (2017). Heat flux estimates from SUMO profiles during the BLLAST campaign. (external link)
- Marius Opsanger Jonassen; Siiri Wickström; John J. Cassano et al. (2020). Observations and simulations from an arctic fjord and valley environment in Svalbard. (external link)
- Stephan T. Kral; Joachim Reuder; Stephanie Mayer et al. (2016). The ISOBAR project (2016-2018) - Observations on the stable polar Atmospheric Boundary Layer from Remotely Piloted Aircraft Systems. (external link)
- Line Båserud; Joachim Reuder; Stephan T. Kral et al. (2015). Turbulence measurements from the RPAS SUMO during BLLAST. (external link)
- Line Båserud; Joachim Reuder; Marius Opsanger Jonassen et al. (2016). Heat fluxes estimated from SUMO profiles during the BLLAST Field campaign. (external link)
- Marius Opsanger Jonassen (2008). SUMO - A Small Unmanned Meteorological Observer for boundary layer research. (external link)
- Joachim Reuder; Line Båserud; Marius Opsanger Jonassen (2014). Operation of the RPAS SUMO for boundary layer measurements during the BLLAST campaign - Experiences and results. (external link)
- Joachim Reuder; Marius Opsanger Jonassen (2012). Turbulence measurements in a wind park with the Micro-UAS SUMO. (external link)
- Martin Müller; Christian Lindenberg; Stephan Kral et al. (2017). Two new RPAS for atmospheric boundary layer research based on an off-the-shelf model aircraft and the Paparazzi autopilot. (external link)
- Marius Opsanger Jonassen; Haraldur Ólafsson; Hálfdán Ágústsson et al. (2013). Observations of the South Iceland wake using RPAS. (external link)
- Joan Cuxart; Jens Dünnerman; Burkhard Wrenger et al. (2013). Sampling small scale surface temperature heterogeneities with small RPAS. (external link)
- Alena Dekhtyareva; Marion Maturilli; Kerstin Ebell et al. (2022). Cloud microphysical processes during ISLAS 2020 campaign: remote sensing, radiosonde and model data. (external link)
- Teresa Maaria Remes; Yurii Batrak; Jonassen Marius et al. (2022). Improving Arctic Weather Forecasts with Increased Resolution. (external link)
- Joachim Reuder; Line Båserud; Stephan T. Kral et al. (2016). Proof of concept for turbulence measurements with the RPAS SUMO during the BLLAST campaign. (external link)
- Marius Opsanger Jonassen; Haraldur Ólafsson; Hálfdán Ágústsson et al. (2012). Assimilating data from an unmanned aircraft into a local-scale numerical weather forecast. (external link)
- Joachim Reuder; Marius Opsanger Jonassen (2012). First results of turbulence measurements in a wind park with the Small Unmanned Meteorological Observer SUMO. (external link)
- Line Båserud; Joachim Reuder; Marius Opsanger Jonassen et al. (2018). SUMO profile flights from BLLAST – Flux estimates under various conditions. (external link)
- Joachim Reuder; Marius Opsanger Jonassen; Båserud Line (2013). Test and application of a turbulent flow measurement system for the RPAS SUMO. (external link)
- Haraldur Ólafsson; Marius Opsanger Jonassen; Halfdan Agustsson et al. (2013). The MOSO field experiment - Overview of findings. (external link)
- Richard Hann; Andrew Hodson; Marius Opsanger Jonassen (2019). Glacier Mapping and Wind Estimation with UAVs on Svalbard. (external link)
- Stephan Kral; Joachim Reuder; Andrew Seidl et al. (2018). The ISOBAR project on stable boundary layers – The two campaigns on Hailuoto 2017 and 2018. (external link)
- Stephan Kral; Joachim Reuder; Line Båserud et al. (2017). RPAS based observation on the Arctic Boundary Layer during the ISOBAR campaigns on Andøya and Hailuoto. (external link)
- Siiri Wickström; Marius Opsanger Jonassen; John J. Cassano et al. (2020). Present temperature, precipitation and rain-on-snow climate in Svalbard. (external link)
- Joachim Reuder; Stephan Kral; Andrew Seidl et al. (2019). The ISOBAR Project on stable boundary layers - Current status on data analysis and results. (external link)
- Stephan T. Kral; Marius Opsanger Jonassen; Timo Pekka Vihma et al. (2014). Turbulent flux measurements in the Arctic Boundary Layer using the Small Unmanned Meteorological Observer (SUMO). (external link)
- Andrew Walter Seidl; Aina Marie Johannessen; Alena Dekhtyareva et al. (2021). High-resolution, near-surface profiles of stable water isotopes over snow-covered tundra and fjord water. (external link)
- Kim Senger; Lilith Kuckero; Peter Betlem et al. (2023). Digitalising Svalbard with Svalbox: towards a baseline survey of one of the world’s fastest warming places. (external link)
- Marius Opsanger Jonassen (2021). How we use weather data at UNIS. (external link)
- Joachim Reuder; Marius Opsanger Jonassen; Line Båserud (2012). Turbulence measurements with the micro-UAS SUMO - Technical developments and first applications. (external link)
- Joachim Reuder; Pascal Brisset; Marius Opsanger Jonassen et al. (2008). SUMO: A Small Unmanned Meteorological Observer for atmospheric boundary layer research. (external link)
- Marius Opsanger Jonassen (2022). Rain-on-snow events in Svalbard, climatology and trends. (external link)
- Timo Vihma; Tuomas Naakka; Qizhen Sun et al. (2020). Impact of assimilation of radiosonde and UAV observations on numerical weather prediction analyses and forecasts in the Arctic and Antarctic. (external link)
- Joachim Reuder; Stephan Kral; Line Båserud et al. (2018). The two ISOBAR Stable Boundary Layer Field Campains at Hailuoto, Finland in 2017 and 2018: Experimental Setup and First Results. (external link)
- Stephan T. Kral; Line Båserud; Joachim Reuder et al. (2015). Yaw angle estimation for the measurement of turbulent fluxes from the Small Unmanned Meteorological Observer (SUMO). (external link)
Academic literature review
- Marius Opsanger Jonassen; Priit Tisler; Barbara Altstadter et al. (2015). Application of remotely piloted aircraft systems in observing the atmospheric boundary layer over Antarctic sea ice in winter. (external link)
- Sebastian Gerland; Randi Brunvær Ingvaldsen; Marit Reigstad et al. (2023). Still Arctic? — The changing Barents Sea. (external link)
- Xiangdong Zhang; Timo Pekka Vihma; Annette Rinke et al. (2025). Weather and climate extremes in a changing Arctic. (external link)
- Ian Alasdair Renfrew; RS Pickart; Kjetil Våge et al. (2019). The Iceland Greenland seas project. (external link)
Doctoral thesis (PhD)
- Marius Opsanger Jonassen (2012). Local- and Mesoscale Variability of Winds in the Complex Topography of Southwestern Norway and Iceland. (external link)
- Siiri Wickström; Marius Opsanger Jonassen; Timo Pekka Vihma (2020). Warmer and Wetter Winters over the high-latitude North Atlantic : an atmospheric circulation perspective. (external link)
- Joachim Reuder; Timo Vihma; Marius Opsanger Jonassen et al. (2020). Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer. (external link)
Master’s thesis
Research report
- Morten Andreas Ødegaard Køltzow; Matilda Hallerstig; Rune Graversen et al. (2020). MET Report: Verification metrics and diagnostics appropriate for the (maritime) Arctic. (external link)
- Siiri Wickström; Marius Opsanger Jonassen (2023). Klimaendringer på Svalbard - nå og i fremtiden. (external link)
- Eirik Albrechtsen; Stina Marie Hov Andreassen Andreassen; Siri Mariane Holen et al. (2024). Arct-Risk sluttrapport. Hovedresultater fra forskningsprosjektet “Risk governance of climate-related systemic risk in the Arctic” (Arct-Risk). (external link)
- Eirik Albrechtsen; Stina Marie Hov Andreassen Andreassen; Siri Mariane Holen et al. (2024). Arct-Risk Final Report. Main results from the research project “Risk governance of climate-related systemic risk in the Arctic” (Arct-Risk). (external link)
Non-fiction book chapter
- Richard Hann; Peter Betlem; Kajetan Deja et al. (2022). Update to Scientific Applications of Unmanned Vehicles in Svalbard. (external link)
- Richard Hann; Peter Betlem; Kajetan Deja et al. (2023). Practical Guidelines for Scientific Application of Uncrewed Aerial Vehicles in Svalbard. (external link)
- Richard Hann; Barbara Altstädter; Peter Betlem et al. (2021). Scientific Applications of Unmanned Vehicles in Svalbard. (external link)
Academic book chapter
See a complete overview of publications in Cristin.
Jonassen, M. O., Ólafsson, H., Ágústsson, H. Rögnvaldsson, Ó. and Reuder, J.
Improving High-Resolution Numerical Weather Simulations by Assimilating Data from an Unmanned Aerial System
Accepted for publication in Monthly Weather Review, 2012
Jonassen, M. O., Ólafsson, H., Reuder, J. and Olset, J.A. accepted.
Multi-scale Variability of Winds in the Complex Topography of Southwestern Norway.
accepted in Tellus A for publiciation in 2012.
Mayer, S. A. Sandvik, M. O. Jonassen And J. Reuder, 2010. Atmospheric profiling with the UAS SUMO: a new perspective for the evaluation of fine-scale atmospheric models. Meteor. Atmos. Phys., doi: 10.1007/s00703-010-0063-2.
Steensen, B. M., Ólafsson, H. and Jonassen, M. O.
2011. An extreme precipitation event in Central Norway. Tellus 63A. DOI: 10.1111/j.1600-0870.2011.00522.x
J. Reuder, P. Brisset, M. O. Jonassen, M. Müller, and S. Mayer 2009
The Small Unmanned Meteorological Observer SUMO: A new tool for atmospheric boundary layer research.
Meteorol. Z., 18 , 141-147.
Reuder, J., M. Ablinger, H. Agustsson, P. Brisset, S. Brynjolfsson, M. Garhammer, T. Johannesson, M. O. Jonassen, R. Kühnel, S. Lämmlein, T. de Lange, C. Lindenberg, S. Malardel, S. Mayer, M. Müller, H. Olafsson, O. Rögnvaldsson, W. Schäper, T. Spengler, G. Zängl, and J. Egger, 2010: FLOHOF 2007: An overview of the mesoscale meteorological field campaign at Hofsjökull, Central Iceland. Meteorol. Atmos. Phys., DOI 10.1007/s00703-010-0118-4, 1-13
J. Reuder, P. Brisset, M. Jonassen, M. Müller, and S. Mayer. 2008. SUMO: A Small Unmanned Meteorological Observer for atmospheric boundary layer research. IOP Conference Series: Earth and Environmental Science, 1:DOI: 10.1088/1755_1307/1/1/012014.