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    • Observational Evidence of Magnetic Reconnection in the Terrestrial Bow Shock Transition Region 

      Wang, Shan; Chen, Li-Jen; Bessho, Naoki; Hesse, Michael; Wilson, Lynn B.; Giles, Barbara; Moore, Thomas E.; Russell, Christopher T.; Torbert, Roy B.; Burch, James L. (Journal article; Peer reviewed, 2019)
      We report evidence of magnetic reconnection in the transition region of the Earth's bow shock when the angle between the shock normal and the immediate upstream magnetic field is 65°. An ion‐skin‐depth‐scale current sheet ...

    • Observations of Asymmetric Lobe Convection for Weak and Strong Tail Activity 

      Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Moretto, Therese; Haaland, Stein; Krcelic, Patrik; Milan, Stephen Eric (Journal article; Peer reviewed, 2019)
      In this study we use high‐quality convection data from the Electron Drift Instrument on board Cluster to investigate how near‐Earth tail activity affects the average convection pattern in the magnetotail lobes when the ...

    • Observations of Blue Corona Discharges in Thunderclouds 

      Husbjerg, Lasse Skaaning; Neubert, Torsten; Chanrion, Olivier; Dimitriadou, Krystallia; Li, Dongshuai; Stendel, Martin; Kaas, Eigil; Østgaard, Nikolai; Reglero, Victor (Journal article; Peer reviewed, 2022)
      Blue electric streamer discharges in the upper reaches of thunderclouds are observed as flashes of 337.0 nm (blue) with faint or no emissions of 777.4 nm (red). Analyzing 3 years of measurements by the Atmosphere-Space ...

    • Observations of bridge stay cable vibrations in dry and wet conditions: A case study 

      Daniotti, Nicolo; Jakobsen, Jasna Bogunovic; Snæbjørnsson, Jonas Thor; Cheynet, Etienne; Wang, Jungao (Journal article; Peer reviewed, 2021-04-01)
      The characteristics of wind- and rain-wind-induced vibrations of bridge stay cables are studied by using ambient vibrations records acquired on a cable-stayed bridge. Mean wind speed and wind-cable angle, as well as the ...

    • Observations of Electron Precipitation During Pulsating Aurora and Its Chemical Impact 

      Kebede, Fasil Tesema; Partamies, Noora; Tyssøy, Hilde Nesse; Kero, Antti; Smith-Johnsen, Christine (Journal article; Peer reviewed, 2020)
      Pulsating auroras (PsAs) are low‐intensity diffuse aurora, which switch on and off with a quasiperiodic oscillation period from a few seconds to ∼10 s. They are predominantly observed after magnetic midnight, during the ...

    • Observations of precipitation energies during different types of pulsating aurora 

      Kebede, Fasil Tesema; Partamies, Noora; Tyssøy, Hilde Nesse; McKay, Derek (Journal article; Peer reviewed, 2020)
      Pulsating aurora (PsA) is a diffuse type of aurora with different structures switching on and off with a period of a few seconds. It is often associated with energetic electron precipitation (>10 keV) resulting in the ...

    • Observations of sunlit N2+ aurora at high altitudes during the RENU2 flight 

      Ellingsen, Pål Gunnar; Lorentzen, Dag Arne; Kenward, David; Hecht, James H.; Evans, J. Scott; Sigernes, Fred; Lessard, Marc (Journal article; Peer reviewed, 2021)
      We present measurements of sunlit aurora during the launch of the Rocket Experiment for Neutral Upwelling 2 (RENU2) on the 13 December 2015, 07:34 UTC. The in situ auroral conditions coincide with those of sunlit aurora ...

    • Observations of Turbulence at a Near-Surface Temperature Front in the Arctic Ocean 

      Koenig, Zoé Charlotte; Fer, Ilker; Kolås, Eivind; Fossum, Trygve Olav; Norgren, Petter; Ludvigsen, Martin (Journal article; Peer reviewed, 2020)
      High-resolution ocean temperature, salinity, current, and turbulence data were collected at an Arctic thermohaline front in the Nansen Basin. The front was close to the sea ice edge and separated the cold and fresh surface ...

    • Observed Changes in the Arctic Freshwater Outflow in Fram Strait 

      Karpouzoglou, Theodoros; de Steur, Laura; Smedsrud, Lars Henrik; Sumata, Hiroshi (Journal article; Peer reviewed, 2022)
      We have updated time series of liquid fresh water transport (FWT) in the East Greenland Current (EGC) in the western Fram Strait with mooring observations since 2015. Novel data have been used to correct earlier estimates ...

    • Observer agreement of imaging measurements used for evaluation of dentofacial deformity in juvenile idiopathic arthritis 

      Fischer, Johannes Maria; Halbig, Josefine Mareile; Augdal, Thomas Angell; Angenete, Oskar W; Stoustrup, Peter; Kristensen, Kasper Dahl; Skeie, Marit Slåttelid; Tylleskär, Karin; Rosén, Annika; Shi, Xie-Qi; Rosendahl, Karen (Journal article; Peer reviewed, 2022)
      Objectives: To examine the precision of imaging measures commonly used to assess mandibular morphology in children and adolescents with juvenile idiopathic arthritis (JIA). Secondly, to compare cone-beam computed tomography ...

    • Observing Antarctic Bottom Water in the Southern Ocean 

      Silvano, Alessandro; Purkey, Sarah; Gordon, Arnold L.; Castagno, Pasquale; Stewart, Andrew L.; Rintoul, Stephen R.; Foppert, Annie; Gunn, Kathryn L.; Herraiz-Borreguero, Laura; Aoki, Shigeru; Nakayama, Yoshihiro; Naveira Garabato, Alberto C.; Spingys, Carl; Akhoudas, Camille Hayatte; Sallée, Jean-Baptiste; de Lavergne, Casimir; Abrahamsen, E. Povl; Meijers, Andrew J. S.; Meredith, Michael P.; Zhou, Shenjie; Tamura, Takeshi; Yamazaki, Kaihe; Ohshima, Kay I.; Falco, Pierpaolo; Budillon, Giorgio; Hattermann, Tore; Janout, Markus A.; Llanillo, Pedro; Bowen, Melissa M.; Darelius, Elin Maria K.; Østerhus, Svein; Nicholls, Keith W.; Stevens, Craig; Fernandez, Denise; Cimoli, Laura; Jacobs, Stanley S.; Morrison, Adele K.; Hogg, Andrew McC.; Haumann, F. Alexander; Mashayek, Ali; Wang, Zhaomin; Kerr, Rodrigo; Williams, Guy D.; Lee, Won Sang (Journal article; Peer reviewed, 2023)
      Dense, cold waters formed on Antarctic continental shelves descend along the Antarctic continental margin, where they mix with other Southern Ocean waters to form Antarctic Bottom Water (AABW). AABW then spreads into the ...

    • Observing atmospheric convection with dual-scanning lidars 

      Duscha, Christiane Anabell; Palenik, Juraj; Spengler, Thomas; Reuder, Heinrich Joachim (Journal article; Peer reviewed, 2023)
      While convection is a key process in the development of the atmospheric boundary layer, conventional meteorological measurement approaches fall short in capturing the evolution of the complex dynamics of convection. To ...

    • Observing Music Therapy in Dementia: Repeated Single-case Studies Assessing Well-being and Sociable Interaction 

      Madsø, Kristine Gustavsen; Molde, Helge; Hynninen, Kia Minna; Nordhus, Inger Hilde Norunn Gjøsæther (Journal article; Peer reviewed, 2022)
      Objectives: This study compared behavioral expressions of momentary well-being and sociable behavior toward significant others during music therapy and regular social interaction. Methods: A 10-week active music therapy ...

    • Occupation-related factors affecting the health of migrants working during the COVID-19 pandemic – a qualitative study in Norway 

      Benavente Velando, Pierina Alexandra; Ronda, Elena; Diaz Perez, Esperanza (Journal article; Peer reviewed, 2023)
      Background The effects of the COVID-19 pandemic were more pronounced among migrants than in the majority population and went beyond those directly caused by the virus. Evidence suggests that this overburden is due to ...

    • Occupational Benzene Exposure in the Norwegian Offshore Petroleum Industry, 2002-2018 

      Ridderseth, Hilde; Daltveit, Dagrun Slettebø; Hollund, Bjørg Eli; Kirkeleit, Jorunn; Kromhout, H; Kruger, K; Austgulen, LT; Bråtveit, Magne (Journal article; Peer reviewed, 2022)
      Purpose Workers on offshore petroleum installations are at risk of being exposed to benzene which is carcinogenic to humans. The present study aimed to assess the time trend of full-shift benzene exposure from 2002 to ...

    • Occupational exposure to air pollutants emitted from in situ burning of offshore oil spills: a large-scale field study 

      Szwangruber, Marta Katarzyna; Gjesteland, Ingrid; Hollund, Bjørg Eli; Faksness, Liv Guri; Taban, Ingrid Christina; Holbu, Jan Willie; Dolva, Hilde; Bråtveit, Magne (Journal article; Peer reviewed, 2022)
      Background: In-situ burning (ISB) could be an effective cleanup method during spills. This study aims to study occupational exposure to pollutants emitted from offshore, large-scale ISB-experiments among personnel on ...

    • Occurrence and phenomenology of hallucinations in the general population: A large online survey 

      Linszen, Mascha M. J.; de Boer, Janna N.; Schutte, Maya J. L.; Begemann, Marieke J. H.; de Vries, Jacqueline; Koops, Sanne; Blom, Renske E.; Bohlken, Marc M.; Heringa, Sophie M.; Blom, Jan Dirk; Sommer, Iris Else Clara (Journal article; Peer reviewed, 2022)
      Although epidemiological studies report that hallucinations occur in 6–15% of the general population, little is known about their phenomenology. To overcome this paucity, this study investigates the phenomenological ...

    • Occurrence and severity of myasthenic crisis in an unselected Turkish cohort of patients with myasthenia gravis 

      Ozyurt Kose, Selen; Nazli, Ezgi; Tutkavul, Kemal; Gilhus, Nils Erik (Journal article; Peer reviewed, 2023)
      Myasthenia gravis (MG) is a disorder of the neuromuscular junction that can deteriorate into myasthenic crisis, involving weakness of bulbar and respiratory muscles. In this study, we describe the clinical manifestations ...

    • Occurrence of salmonid alphavirus and piscine orthoreovirus-1 infections in migrating salmon (Salmo salar L.) post-smolt in western Norway 

      Madhun, Abdullah Sami; Nilsen, Rune; Barlaup, Bjørn Torgeir; Karlsen, Ørjan; Karlsbakk, Egil Erlingsson (Journal article; Peer reviewed, 2023)
      Viral diseases are a serious problem in Atlantic salmon (Salmo salar L.) farming in Norway, often leading to reduced fish welfare and increased mortality. Disease outbreaks in salmon farms may lead to spread of viruses to ...

    • Occurrence Statistics of Horse Collar Aurora 

      Bower, G.E.; Milan, Stephen Eric; Paxton, L.J.; Anderson, B.J. (Journal article; Peer reviewed, 2022)
      Horse collar aurora (HCA) are an auroral feature where the dawn and dusk sector auroral oval moves polewards and the polar cap becomes teardrop shaped. They form during prolonged periods of northward interplanetary magnetic ...