Kjellmar Oksavik
Professor, Birkelandsenteret for romforskning
- E-postkjellmar.oksavik@uib.no
- Telefon+47 55 58 83 38
- BesøksadresseAllégaten 555007 BergenRom433
- PostadressePostboks 78035020 Bergen
Undervisning:
Forskning:
- (2023). E3D-BRITE: EISCAT_3D-based reconstruction of ionosphere-thermosphere electrodynamics.
- (2023). Can Throat Auroras Create Polar Cap Patches?
- (2022). The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017. Journal of Space Weather and Space Climate. 15 sider.
- (2022). The Dependence of Cold and Hot Patches on Localized Plasma Transport and Particle Precipitation.
- (2022). The Dependence of Cold and Hot Patches on Local Plasma Transport and Particle Precipitation in Northern Hemisphere Winter. Geophysical Research Letters. 8 sider.
- (2022). Statistical characteristics of ionospheric irregularities in the cusp ionosphere based on multi-instrument techniques.
- (2022). Sounding rocket investigation of multi-scale (density) irregularities in the cusp region.
- (2022). On the Acceleration of Polar Cap Patches Entering the Nightside Auroral Oval.
- (2022). Multi-instrument multi-scale characterization of ionospheric irregularities in the cusp region.
- (2022). Interferometric Study of Ionospheric Plasma Irregularities in Regions of Phase Scintillations and HF Backscatter. Geophysical Research Letters. 11 sider.
- (2022). EISCAT_3D - research infrastructure for international collaboration on exploration of the upper atmosphere and space above the Arctic .
- (2022). EISCAT 3D Norway - An Overview.
- (2022). Diagnose the diffractive contribution to GNSS scintillation at high latitude during the geomagnetic storm on 7-8 September 2017.
- (2022). Dayside Transient Phenomena and Their Impact on the Magnetosphere and Ionosphere. Space Science Reviews. 146 sider.
- (2022). Creation, Depletion and End of Life of Polar Cap Patches.
- (2022). A “wave-like” Evolution of Polar Cap Patches Modulated by the Magnetotail Reconnections in Wide Magnetic Local Time Regions.
- (2022). A statistical study of space hurricanes in the Northern Hemisphere. Frontiers in Astronomy and Space Sciences. 9 sider.
- (2022). A statistical study of polar cap flow channels observed in both hemispheres using SuperDARN radars. Journal of Space Weather and Space Climate. 15 sider.
- (2022). A Small and Nearly Fully Closed Earth’s Magnetosphere for Strongly Northward Interplanetary Magnetic Field.
- (2021). The GPS Scintillations and TEC Variations in Association with A Polar Cap Arc.
- (2021). The Cusp as a VLF Saucer Source: First Rocket Observations of Long‐Duration VLF Saucers on the Dayside. Geophysical Research Letters. 9 sider.
- (2021). Sounding rocket studies of ionospheric turbulence above Svalbard.
- (2021). Solar and geomagnetic activity impact on occurrence and spatial size of cold and hot polar cap patches. Geophysical Research Letters. 9 sider.
- (2021). Solar and Geomagnetic Activity Impact on Occurrence and Spatial Size of Cold and Hot Polar Cap Patches.
- (2021). Scientists spot a 'space hurricane' for the first time.
- (2021). Rom-orkan over Nordpolen.
- (2021). På tide å se opp.
- (2021). Nordlyset: Den himmelske danserinnen! Naturen. 128-137.
- (2021). Nordlys-forskning: Oppdaget rom-orkan.
- (2021). Multiple transpolar auroral arcs reveal new insight about coupling processes in the Earth’s magnetotail.
- (2021). Multiple Transpolar Auroral Arcs Reveal New Insight About Coupling Processes in the Earth’s Magnetotail.
- (2021). Multiple Transpolar Auroral Arcs Reveal New Insight About Coupling Processes in the Earth’s Magnetotail.
- (2021). Mer nordlys i årene fremover: - Folk må bli flinkere til å se opp.
- (2021). Kjellmar frå Fosnavåg oppdaga rom-orkan.
- (2021). Intervju om rom-orkan i ettermiddagssendinga.
- (2021). Historisk rom-orkan.
- (2021). Hev seg i bilen for å ta bilder.
- (2021). Hemispheric and seasonal variations in the cold plasma outflow source region: Swarm and CHAMP observations of F-region polar cap electron density.
- (2021). Heftig nordlys over Vestland i natt: - Jeg så varselet og kastet meg i bilen.
- (2021). GPS Scintillations and TEC Variations in Association With a Polar Cap Arc. Journal of Geophysical Research (JGR): Space Physics. 11 sider.
- (2021). Exploring solar-terrestrial interactions via multiple imaging observers. Experimental astronomy (Print).
- (2021). Electron Density Depletion Region Observed in the Polar Cap Ionosphere. Journal of Geophysical Research (JGR): Space Physics. 13 sider.
- (2021). Electrodynamics surrounding polar cap auroral arcs.
- (2021). Dette er en romorkan.
- (2021). Denne mørke flekken kan skape himmelmagi i Bergen.
- (2021). Denne flekken kan skape himmelmagi.
- (2021). A space hurricane over the Earth’s polar ionosphere. Nature Communications. 10 sider.
- (2021). A Space Hurricane Over the Earth’s Polar Ionosphere.
- (2020). Subauroral GPS TEC and phase variations during geomagnetic storms.
- (2020). Statistical Study of the Relationship Between Ion Upflow and Field-Aligned Current in the Topside Ionosphere for Both Hemispheres During Geomagnetic Disturbed and Quiet Time. Journal of Geophysical Research (JGR): Space Physics. 10 sider.
- (2020). Seasonal and Hemispheric Asymmetries of F Region Polar Cap Plasma Density: Swarm and CHAMP Observations. Journal of Geophysical Research (JGR): Space Physics. 13 sider.
- (2020). Plasma density gradients at the edge of polar ionospheric holes: the absence of phase scintillation. Annales Geophysicae. 575-590.
- (2020). Overview of the Rocket Experiment for Neutral Upwelling Sounding Rocket 2 (RENU2). Geophysical Research Letters. 1-7.
- (2020). On the Production of Ionospheric Irregularities Via Kelvin-Helmholtz Instability Associated with Cusp Flow Channels. Journal of Geophysical Research (JGR): Space Physics. 21 sider.
- (2020). On multi-scale density irregularities observed by sounding rockets within regions of enhanced scintillations in the cusp ionosphere.
- (2020). Multiple transpolar auroral arcs reveal insight about coupling processes in the Earth’s magnetotail. Proceedings of the National Academy of Sciences of the United States of America. 16193-16198.
- (2020). Multiple transpolar auroral arcs reveal insight about coupling processes in the Earth’s magnetotail.
- (2020). Hemispheric and seasonal variations in the cold plasma outflow source region: polar cap ionosphere electron density at 350–500 km.
- (2020). Dayside Field-Aligned Current Impacts on Ionospheric Irregularities. Geophysical Research Letters. 11 sider.
- (2020). Cusp rocket experiment of density structures.
- (2020). A statistical study of polar cap flow channels and their IMF by dependence. Journal of Geophysical Research (JGR): Space Physics. 10 sider.
- (2020). A long-lasting auroral bright spot around magnetic north pole: Is it the evidence of stable lobe magnetic reconnection?
- (2019). VISIONS-2: Imaging ion energization in the cusp.
- (2019). VISIONS-2 observations of the electrodynamics of magnetosphere-ionosphere coupling.
- (2019). VISIONS-2 observations of ion heating and energization near the exobase, and the role of wave-particle interactions.
- (2019). VISIONS-2 Observations of Electron Dynamics and Alfvén Waves.
- (2019). Thermally excited 630.0 nm emissions in the polar ionosphere.
- (2019). The Ion/Electron Temperature Characteristics of Polar Cap Classical and Hot Patches and Their Influence on Ion Upflow.
- (2019). The Cusp Alfven and Plasma Electrodynamics 2 Mission.
- (2019). Statistical study of the relationship between ion upflow and field-aligned current in the topside ionosphere for both hemispheres during disturbed and quiet times.
- (2019). Statistical Study of the Relationship Between Ion Upflow and Field-aligned Current in the Topside Ionosphere for Both Hemispheres During Disturbed and Quiet Times.
- (2019). Simultaneous rocket and scintillation observations of plasma irregularities associated with a reversed flow event in the cusp ionosphere. Journal of Geophysical Research (JGR): Space Physics. 7098-7111.
- (2019). Severe GPS Phase and Amplitude Scintillations at High Latitudes During the 2015 St. Patrick’s Day Storm.
- (2019). Separation and quantification of ionospheric convection sources: 2. The dipole tilt angle influence on reverse convection cells during northward IMF. Journal of Geophysical Research (JGR): Space Physics. 6182-6194.
- (2019). Separation and quantification of ionospheric convection sources: 1. A new technique. Journal of Geophysical Research (JGR): Space Physics. 6343-6357.
- (2019). Results from a Grand Challenge Initiative-Cusp Mission: VISIONS-2.
- (2019). Quantifying the dipole tilt influence on reverse convection cells during northward IMF using spherical elementary functions.
- (2019). On the sources of Cusp Ionospheric Scintillation Irregularities.
- (2019). Observational evidence for throat aurora being associated with magnetopause reconnection. Geophysical Research Letters. 7113-7120.
- (2019). Modeling scintillation produced by ionospheric Kelvin Helmholtz in the cusp ionosphere using GEMINI-SIGMA.
- (2019). Meso-scale ionospheric flow cells, localized Joule heating, and ion upflow associated with throat aurora as observed by EISCAT.
- (2019). EDGAR: Energy Deposition in the Geomagnetic Cusp Alfvén Resonator.
- (2019). Dual Sounding Rocket Observations of Plasma Convection and Shear, Field-aligned Currents, and Alfven waves and Irregularities in the Cusp during IMF Bz Negative Conditions.
- (2019). CAPER-2 and TRICE-2 Sounding Rocket Investigations: Whistler and Upper-Hybrid Waves in the Polar Cusp.
- (2019). Birkeland Current Impacts on Cusp Ionospheric Irregularities.
- (2019). A reverse flow event as the onset of ionospheric scintillation irregularities in the cusp.
- (2019). A new way to identify and quantify the sources of ionospheric convection.
- (2019). A new way to identify and quantify the sources of ionospheric convection.
- (2019). A long-lasting auroral bright spot around magnetic north pole: Is it the evidence of stable magnetic reconnection?
- (2019). A Study of Automatically Detected Flow Channels in the Polar Cap Ionosphere. Journal of Geophysical Research (JGR): Space Physics. 9430-9447.
- (2019). A Long-lasting Auroral Bright Spot Around Magnetic North Pole: Is it the Evidence of Stable Magnetic Reconnection?
- (2018). Thermally excited 630.0 nm emissions in the polar ionosphere.
- (2018). The ion/electron temperature characteristics of polar cap classical and hot patches and their influence on ion upflow. Geophysical Research Letters. 8072-8080.
- (2018). The investigation of cusp irregularities rocket program.
- (2018). The Investigation of Cusp Irregularities Rocket Program.
- (2018). Seasonal and solar cycle variations of thermally excited 630.0 nm emissions in the polar ionosphere. Journal of Geophysical Research (JGR): Space Physics. 7029-7039.
- (2018). SMILE: New opportunities for global imaging of space weather near Earth.
- (2018). Recent developments in our knowledge of inner magnetosphere-ionosphere convection. Journal of Geophysical Research (JGR): Space Physics. 7276-7282.
- (2018). Observations of asymmetries in ionospheric return flow during different levels of geomagnetic activity. Journal of Geophysical Research (JGR): Space Physics. 4638-4651.
- (2018). Multi-instrument observations of large-scale atmospheric gravity waves/traveling ionospheric disturbances associated with enhanced auroral activity over Svalbard. Advances in Space Research. 270-281.
- (2018). Multi-instrument observations of atmospheric gravity waves/traveling ionospheric disturbances associated with enhanced auroral activity.
- (2018). GPS Scintillations and Losses of Signal Lock at High Latitudes During the 2015 St. Patrick's Day Storm. Journal of Geophysical Research (JGR): Space Physics. 7943-7957.
- (2018). Equatorward Propagating Auroral Arcs Driven by ULF Wave Activity: Multipoint Ground and Space Based Observations in the Dusk Sector Auroral Oval.
- (2018). Challenges and Strategic Research Plans for Earth and Heliosphere: Research Infrastructures, Projects and Initiatives. Proceedings of the International Astronomical Union. 219-225.
- (2018). Automatic detection of flow channels in the polar cap ionosphere.
- (2018). A New Empirical Model of the Subauroral Polarization Stream. Journal of Geophysical Research (JGR): Space Physics. 7342-7357.
- (2017). When and where is the process of restoring symmetry important?
- (2017). Thermally Excited 630.0 nm Emissions in the Polar Ionosphere.
- (2017). The influence of plasma flows bringing the magnetotail back to a more symmetric configuration.
- (2017). The Occurrence of Small-scale Irregularities in the Mid-latitude Ionosphere from SuperDARN HF Radar Observations.
- (2017). Study of meso-scale reversed flow events in the polar ionosphere by SuperDARN radars.
- (2017). Statistical characterization of the Sub-Auroral Polarization Stream (SAPS).
- (2017). Simultaneous observations of traveling convection vortices: Ionosphere-thermosphere coupling. Journal of Geophysical Research (JGR): Space Physics. 4943-4959.
- (2017). Reversed Flow Events in the Polar Ionosphere.
- (2017). Observations of gravity waves associated with enhanced auroral activity: GPS, FPI and magnetometer measurements over Svalbard.
- (2017). Kelvin Helmholtz and Gradient Drift instabilities in ionosphere cusp flow channels.
- (2017). How often do thermally excited 630.0 nm emissions occur in the Polar Ionosphere? Journal of Geophysical Research (JGR): Space Physics. 698-710.
- (2017). High Resolution Modeling of the Thermospheric Response to Energy Inputs during the RENU-2 Rocket Flight.
- (2017). Geomagnetic storms of March 17, 2013 and 2015: GPS phase scintillation and auroral electrojet currents.
- (2017). GPS scintillations associated with cusp dynamics and polar cap patches. Journal of Space Weather and Space Climate. 12 sider.
- (2017). GPS phase scintillation and auroral electrojet currents during geomagnetic storms of March 17, 2013 and 2015.
- (2017). Examination of Cross-Scale Coupling During Auroral Events using RENU2 and ISINGLASS Sounding Rocket Data.
- (2017). Equatorward propagating auroral arcs driven by ULF wave activity: Multipoint ground- and space-based observations in the dusk sector auroral oval. Journal of Geophysical Research (JGR): Space Physics. 5591-5605.
- (2017). Energetic proton spectra measured by the Van Allen probes. Journal of Geophysical Research (JGR): Space Physics. 10,129-10,144.
- (2017). Dynamic properties of throat aurora revealed by simultaneous ground and satellite observations. Journal of Geophysical Research (JGR): Space Physics. 3469-3486.
- (2017). Comparison of geomagnetic March 2013 and 2015 storms: GPS phase scintillation and auroral electrojet currents.
- (2017). Channels of Reversed Flow in the Polar Ionosphere.
- (2016). Structure of the thermosphere during energy input through the magnetospheric cusp: Measurements from the RENU2 ionization gauge.
- (2016). Statistical study of the GNSS phase scintillation associated with two types of auroral blobs. Journal of Geophysical Research (JGR): Space Physics. 4679-4697.
- (2016). Simultaneous Ground-based Optical And HF Radar Observations Of The Ionospheric Footprint Of The Open/closed Field Line Boundary.
- (2016). Scintillation and irregularities from the nightside part of a Sun-aligned polar cap arc. Journal of Geophysical Research (JGR): Space Physics. 5723-5736.
- (2016). Raising young peoples’ eyes to the stars.
- (2016). Plasma Flow Channel Events in the Polar Ionosphere.
- (2016). On the contribution of thermal excitation to the total 630.0 nm emissions in the northern cusp ionosphere. Journal of Geophysical Research (JGR): Space Physics. 1234-1245.
- (2016). Occurrence and Characteristics of Thermally Excited 630.0 nm Emissions in the Polar Ionosphere.
- (2016). Mesoscale ionospheric plasma irregularities and scintillation over Svalbard.
- (2016). Mechanisms responsible for asymmetric aurora between the conjugate hemispheres.
- (2016). GPS phase scintillation during the geomagnetic storms of March 17, 2013 and 2015: Interhemispheric comparison and the relation to auroral electrojet currents.
- (2016). GPS phase scintillation during the geomagnetic storm of March 17, 2015: The relation to auroral electrojet currents.
- (2016). GPS phase scintillation during the geomagnetic storm of March 17, 2015: The relation to auroral electrojet currents.
- (2016). GPS phase scintillation during the geomagnetic storm of March 17, 2015: The relation to auroral electrojet currents.
- (2016). GPS phase scintillation at high latitudes during the geomagnetic storm of 17-18 March 2015. Journal of Geophysical Research (JGR): Space Physics. 10,448-10,465.
- (2016). F-region ionosphere effects on the mapping accuracy of SuperDARN HF radar echoes.
- (2016). F region ionosphere effects on the mapping accuracy of SuperDARN HF radar echoes. Radio Science. 490-506.
- (2016). Dynamic effects of restoring footpoint symmetry on closed magnetic field-lines: Asymmetric Birkeland currents.
- (2016). Dynamic effects of restoring footpoint symmetry on closed magnetic field lines. Journal of Geophysical Research (JGR): Space Physics. 3963-3977.
- (2016). Cusp Electron Populations During a Neutral Upwelling Event: Measurements from RENU2 and MMS Conjunction.
- (2016). A Cusp Density Enhancement Study using CHAMP/EISCAT conjunctions.
- (2015). Van Allen probes, NOAA, GOES, and ground observations of an intense EMIC wave event extending over 12 h in magnetic local time. Journal of Geophysical Research (JGR): Space Physics. 5465-5488.
- (2015). Van Allen Probes, NOAA, and Ground Observations of an Intense Pc 1 Wave Event Extending 12 Hours in MLT and its Resulting Depletion of the Outer Radiation Belt.
- (2015). Van Allen Probes, NOAA, and Ground Observations of an Intense Pc 1 Wave Event Extending 12 Hours in MLT and its Resulting Depletion of the Outer Radiation Belt.
- (2015). The total solar eclipse on Svalbard 2015.
- (2015). The science case for the EISCAT_3D radar. Progress in Earth and Planetary Science.
- (2015). Solformørkelsen var enda bedre enn forventet. Forskerjubel på Svalbard.
- (2015). Solformørkelsen på Svalbard.
- (2015). Simultaneous ground-based optical and HF radar observations of the ionospheric footprint of the open/closed field line boundary along the geomagnetic meridian. Journal of Geophysical Research (JGR): Space Physics. 9859-9874.
- (2015). Severe and localized GNSS scintillation at the poleward edge of the nightside auroral oval during intense substorm aurora. Journal of Geophysical Research (JGR): Space Physics. 10607-10621.
- (2015). Se nordlyset over Rundemanen.
- (2015). Scintillation from poleward moving auroral forms in the cusp ionosphere.
- (2015). Scintillation and loss of signal lock from poleward moving auroral forms in the cusp ionosphere. Journal of Geophysical Research (JGR): Space Physics. 9161-9175.
- (2015). Preliminary results from the total solar eclipse campaign on Svalbard 2015.
- (2015). Particle Detector - Bounce Loss Cone Fluxes .
- (2015). On the importance of magnetotail untwisting.
- (2015). Observations of the dayside cusp aurora using ground-based optics and radar.
- (2015). Observations of simultaneous multi-constellation GNSS scintillation in nightside aurora over Svalbard.
- (2015). Ion upflow dependence on ionospheric density and solar photoionization. Journal of Geophysical Research (JGR): Space Physics. 10039-10052.
- (2015). Ion upflow dependence on ionospheric density and solar photoionozation.
- (2015). Investigation of F-region auroral blobs by the ICI-4 sounding rocket.
- (2015). In-flight calibration of NOAA POES proton detectors - Derivation of the MEPED correction factors. Journal of Geophysical Research (JGR): Space Physics. 9578-9593.
- (2015). GNSS scintillation case studies at high latitudes following solar events of January 2014.
- (2015). FTE driven dynamics of the F-region cusp ionosphere.
- (2015). Dayside 630.0 nm emissions due to thermally excited O(1D) in the cusp region ionosphere over Longyearbyen, Svalbard.
- (2015). Dayside 630.0 nm emissions due to thermally excited O(1D) in the cusp region ionosphere over Longyearbyen, Svalbard.
- (2015). Co-ordinated EISCAT and optical measurements of multiple equatorward propagating auroral arcs.
- (2015). Are there auroral signatures related to asymmetric generation of field-aligned currents in the tail due to an IMF By induced twist?
- (2015). 11 lange dagers ferd mot nordlyset.
- (2014). What can multi-constellation GNSS measurements do for EISCAT_3D?
- (2014). Van Allen Probes, NOAA, and Ground Observations of an Intense Pc 1 Wave Event Extending 12 Hours in MLT.
- (2014). The Kjell Henriksen Observatory – a window into space.
- (2014). The GALILEO navigation system and space weather effects in the polar cap.
- (2014). Plasma irregularities in the polar F-region of the ionosphere.
- (2014). Plasma convection over the polar ionosphere.
- (2014). Observational tests of flux transfer event structure.
- (2014). Ionospheric scintillations in the dayside polar ionosphere.
- (2014). Intensity asymmetries in the dusk sector of the poleward auroral oval due to IMF Bx. Journal of Geophysical Research (JGR): Space Physics. 9497-9507.
- (2014). Hemispheric differences in solar wind – magnetosphere interactions.
- (2014). Hemispheric asymmetries in the global aurora and IMF Bx.
- (2014). GPS scintillation and irregularities at the front of a tongue of ionization in the nightside polar ionosphere over Svalbard.
- (2014). GPS phase scintillation and irregularities at the front of a tongue of ionization in the nightside polar cap.
- (2014). GNSS scintillations in the nightside polar ionosphere over Svalbard.
- (2014). Day-night coupling by a localized flow channel visualized by polar cap patch propagation. Geophysical Research Letters. 3701-3709.
- (2014). Day-night coupling by a localized flow channel visualized by polar cap patch propagation.
- (2014). Conjugate and non-conjugate aspects of the aurora.
- (2014). Comparison of solar wind driving of the aurora in the two hemispheres due to the solar wind dynamo.
- (2014). Comparison of solar wind driving of the aurora in the two hemispheres due to solar wind dynamo.
- (2014). Characterization of high latitude GPS sensed ionospheric irregularities: Case studies.
- (2014). Asymmetric Solar Wind dynamo efficiency and IMF Bx.
- (2014). Arrival of a tongue of ionization in the nightside polar ionosphere and effects on GPS scintillation.
- (2014). A new method of recalibrating NOAA MEPED proton measurements.
- (2014). A New Method of recalibrating NOAA POES MEPED proton measurements.
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