Hjem
Karl M. Laundals bilde

Karl M. Laundal

Forsker
  • E-postKarl.Laundal@uib.no
  • Telefon+47 55 58 27 06+47 913 50 772
  • Besøksadresse
    Allegt. 55
  • Postadresse
    Postboks 7803
    5020 BERGEN

Laundal, K. M. & Østgaard, N. Persistent global proton aurora caused by high solar wind dynamic pressure. J. Geophys. Res. 113. doi:10.1029/2008JA013147 (2008).

Laundal, K. M. & Østgaard, N. Asymmetric auroral intensities in the Earth’s Northern and Southern hemispheres. Nature 460, 491–493 (2009).

Laundal, K. M., Østgaard, N., Snekvik, K. & Frey, H. U. Inter-hemispheric observations of emerging polar cap asymmetries. J. Geophys. Res. doi:10.1029/2009JA015160 (2010).

Laundal, K. M., Østgaard, N., Frey, H. U. & Weygand, J. M. Seasonal and interplanetary magnetic field-dependent polar cap contraction during substorm expansion phase. J. Geophys. Res. doi:10.1029/ 2010JA015910 (2010).

Laundal, K. M. & Gjerloev, J. W. What is the appropriate coordinate system for magnetometer data when analyzing ionospheric currents? J. Geophys. Res. doi:10.1002/2014JA020484 (2014).

Laundal, K. M., Haaland, S. E., Lehtinen, N., Gjerloev, J. W., Ostgaard, N., Tenfjord, P., Reistad, J. P., Snekvik, K., Milan, S. E., Ohtani, S. & Anderson, B. J. Birkeland current effects on high-latitude ground magnetic field perturbations. Geophys. Res. Lett. doi:10.1002/2015GL065776 (2015).

Laundal, K. M., Gjerloev, J. W., Østgaard, N., Reistad, J. P., Haaland, S., Snekvik, K., Tenfjord, P., Ohtani, S. & Milan, S. E. The impact of sunlight on high-latitude equivalent currents. J. Geophys. Res. 2015JA022236. issn: 2169-9402. doi:10.1002/2015JA022236 (2016).

Laundal, K. M., Cnossen, I., Milan, S. E., Haaland, S. E., Coxon, J., Pedatella, N. M., Förster, M. & Reistad, J. P. North-South asymmetries in Earth’s magnetic field – Effects on high-latitude geospace. Space Sci. Rev. doi:10.1007/s11214-016-0273-0 (2017).

Laundal, K. M. & Richmond, A. D. Magnetic coordinate systems. Space Sci. Rev. doi:10.1007/s11214- 016-0275-y (2017).

Laundal, K. M., Finlay, C. C. & Olsen, N. Sunlight effects on the 3D polar current system determined from low Earth orbit measurements. Earth Planets Space. doi:10.1186/s40623-016-0518-x (2016).

Laundal, K. M., Reistad, J. P., Finlay, C. C., Østgaard, N., Tenfjord, P. & Snekvik, K. Interplanetary magnetic field Bx component influence on horizontal and field-aligned currents in the ionosphere. J. Geophys. Res. doi:10.1002/2017JA024864 (2018).

Laundal, K. M., Finlay, C. C., Olsen, N. & Reistad, J. P. Solar wind and seasonal influence on ionospheric currents from Swarm and CHAMP measurements. J. Geophys. Res. doi:10.1029/2018JA025387 (2018).

Reistad, J. P., Østgaard, N., Tenfjord, P., Laundal, K. M., Snekvik, K., Haaland, S., Milan, S., Oksavik, K., Frey, H. & Grocott, A. Dynamic effects of restoring footpoint symmetry on closed magnetic field-lines. J. Geophys. Res. doi:10.1002/2015JA022058 (2016).
  
Østgaard, N., Humberset, B. K. & Laundal, K. M. Evolution of auroral asymmetries in the conjugate hemispheres during two substorms. Geophys. Res. Lett. doi:10.1029/2010GL046057 (2011).

Østgaard, N., Laundal, K. M., Juusola, L., Aasnes, A., Haaland, S. E. & Weygand, J. Interhemispherical asymmetry of substorm onset locations and the interplanetary magnetic field. Geophys. Res. Lett. doi:doi:10.1029/2011GL046767 (2011).

Østgaard, N. & Laundal, K. M. Auroral Asymmetries in the Conjugate Hemispheres and Interhemi- spheric Currents in Auroral Phenomenology and Magnetospheric Processes: Earth And Other Planets (American Geophysical Union, 2013), 99–112. isbn: 9781118670286. doi:10.1029/2011GM001190.

Snekvik, K., Tanskanen, E., Østgaard, N., Juusola, L., Laundal, K. M., Gordeev, E. I. & Borg, A. L. Changes in the magnetotail configuration before near-Earth reconnection. J. Geophys. Res. 117 (2012).

Grujic, K. G., Hegna, T. & Laundal, K. M. In Situ Monitoring of Growth Interfaces: A Review of Noninvasive Methods. JOM 64, 96–101. issn: 1047-4838 (2012).

Søraas, F., Laundal, K. M. & Usanova, M. Coincident particle and optical observations of nightside subauroral proton precipitation. J. Geophys. Res. 118, 1112–1122 (2013).

Reistad, J. P., Østgaard, N., Laundal, K. M. & Oksavik, K. On the non-conjugacy of nightside aurora and their generator mechanisms. J. Geophys. Res. doi:10.1002/jgra.50300 (2013).

Reistad, J. P., Østgaard, N., Laundal, K. M., Haaland, S., Tenfjord, P., Snekvik, K., Oksavik, K. & Milan, S. E. Intensity asymmetries in the dusk sector of the poleward auroral oval due to IMF Bx. J. Geophys. Res. doi:10.1002/2014JA020216 (2014).

Tenfjord, P., Østgaard, N., Snekvik, K., Laundal, K. M., Reistad, J. P., Haaland, S. E. & Milan, S. E. How the IMF By induces a By component in the closed magnetosphere and how it leads to asymmetric currents and convection patterns in the two hemispheres. J. Geophys. Res. (2015).

Østgaard, N., Reistad, J. P., Tenfjord, P., Laundal, K. M., Snekvik, K., Milan, S. E. & Haaland, S. E. Mechanisms that Produce Auroral Asymmetries in Conjugate Hemispheres in Auroral Dynamics and Space Weather (John Wiley & Sons, Inc, 2015), 131–143. isbn: 9781118978719. doi:10.1002/ 9781118978719.ch10.

Tenfjord, P., Østgaard, N., Strangeway, R. J., Haaland, S., Snekvik, K., Laundal, K. M., Reistad, J. P. & Milan, S. E. Magnetospheric response and reconfiguration times following IMF By reversal. J. Geophys. Res. doi:10.1002/2016JA023018 (2017).

Haaland, S., Lybekk, B., Maes, L., Laundal, K. M., Pedersen, A., Tenfjord, P., Ohma, A., Østgaard, N., Reistad, J. P. & Snekvik, K. North-south asymmetries in cold plasma density in the magnetotail lobes: Cluster observations. J. Geophys. Res. doi:10.1002/2016JA023404 (2017).

Snekvik, K., Østgaard, N., Tenfjord, P., Reistad, J. P., Laundal, K. M., Milan, S. E. & Haaland, S. E. Dayside and nightside magnetic field responses at 780 km altitude to dayside reconnection. J. Geophys. Res. doi:10.1002/2016JA023177 (2017).

Milan, S. E., Clausen, L. B. N., Coxon, J. C., Carter, J. A., Walach, M.-T., Laundal, K., Østgaard, N., Tenfjord, P., Reistad, J., Snekvik, K., Korth, H. & Anderson, B. J. Overview of Solar Wind– Magnetosphere–Ionosphere–Atmosphere Coupling and the Generation of Magnetospheric Currents. Space Sci Rev. doi:10.1007/s11214-017-0333-0 (2017).

Friis-Christensen, E., Finlay, C. C., Hesse, M. & Laundal, K. M. Magnetic Field Perturbations from Currents in the Dark Polar Regions During Quiet Geomagnetic Conditions. Space Sci Rev. doi:10. 1007/s11214-017-0332-1 (2017).

Tenfjord, P., Østgaard, N., Haaland, S., Snekvik, K., Laundal, K. M., Reistad, J. P., Strangeway, R. J., Milan, S. E., Hesse, M. & Ohma, A. How the IMF By induces a local By component during northward IMF Bz and characteristic timescales. J. Geophys. Res. 123. doi:10.1002/2018JA025186 (2018).

Vitenskapelig artikkel
  • Hatch, Spencer Mark; Moretto, Therese; Lynch, Kristina A.; Laundal, Karl Magnus; Gjerloev, J.; Lund, Eric. 2020. The Relationship Between Cusp Region Ion Outflows and East‐West Magnetic Field Fluctuations at 4,000‐km Altitude. Journal of Geophysical Research (JGR): Space Physics.
  • Reistad, Jone Peter; Laundal, Karl Magnus; Ohma, Anders; Moretto, Therese; Milan, Steve. 2020. An Explicit IMF B 𝑦 Dependence on Solar Wind-Magnetosphere Coupling. Geophysical Research Letters. 8 sider.
  • Reistad, Jone Peter; Laundal, Karl Magnus; Østgaard, Nikolai; Ohma, Anders; Thomas, Evan G.; Haaland, Stein; Oksavik, Kjellmar; Milan, Stephen Eric. 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.
  • Reistad, Jone Peter; Laundal, Karl Magnus; Østgaard, Nikolai; Ohma, Anders; Haaland, Stein; Oksavik, Kjellmar; Milan, Stephen Eric. 2019. Separation and quantification of ionospheric convection sources: 1. A new technique. Journal of Geophysical Research (JGR): Space Physics. 6343-6357.
  • Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Moretto, Therese; Haaland, Stein; Krcelic, Patrik; Milan, Stephen Eric. 2019. Observations of asymmetric lobe convection for weak and strong tail activity. Journal of Geophysical Research (JGR): Space Physics. 9999-10017.
  • Laundal, Karl Magnus; Hatch, Spencer Mark; Moretto, Therese. 2019. Magnetic Effects of Plasma Pressure Gradients in the Upper F Region. Geophysical Research Letters. 2355-2363.
  • Pitkänen, Timo; Kullen, Anita; Laundal, Karl Magnus; Tenfjord, Paul; Shi, Quanqi; Park, Jongsun; Hamrin, Maria; De Spiegeleer, Alexandre; Chong, Ghai Siung; Tian, Anmin. 2019. IMF By Influence on Magnetospheric Convection in Earth's Magnetotail Plasma Sheet . Geophysical Research Letters. 11698-11708.
  • Milan, Stephen Eric; Carter, Jennifer Alyson; Sangha, Harneet; Laundal, Karl Magnus; Østgaard, Nikolai; Tenfjord, Paul; Reistad, Jone Peter; Snekvik, Kristian; Coxon, John C.; Korth, Haje; Anderson, Brian J. 2018. Timescales of dayside and nightside field-aligned current response to changes in solar wind-magnetosphere coupling. Journal of Geophysical Research (JGR): Space Physics. 7307-7319.
  • Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Rexer, Theresa; Haaland, Stein; Snekvik, Kristian; Hesse, Michael; Milan, Stephen Eric; Ohma, Anders. 2018. The asymmetric geospace as displayed during the geomagnetic storm on 17 August 2001. Annales Geophysicae. 1577-1596.
  • Laundal, Karl Magnus; Finlay, Christopher C.; Olsen, N; Reistad, Jone Peter. 2018. Solar Wind and Seasonal Influence on Ionospheric Currents From Swarm and CHAMP Measurements. Journal of Geophysical Research (JGR): Space Physics. 4402-4429.
  • Burrell, Angeline G.; Halford, Alexa J.; Klenzing, Jeffrey H.; Stoneback, Russell A.; Morley, Steven K.; Annex, Andrew M.; Laundal, Karl Magnus; Kellerman, Adam C.; Stansby, David; Ma, Jerry. 2018. Snakes on a spaceship—An overview of Python in heliophysics. Journal of Geophysical Research (JGR): Space Physics. 10,384-10,402.
  • Kwagala, Norah Kaggwa; Oksavik, Kjellmar; Lorentzen, Dag Arne; Johnsen, Magnar Gullikstad; Laundal, Karl Magnus. 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.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Ohma, Anders; Snekvik, Kristian; Tenfjord, Paul; Grocott, Adrian; Oksavik, Kjellmar; Milan, Steve; Haaland, Stein. 2018. Observations of asymmetries in ionospheric return flow during different levels of geomagnetic activity. Journal of Geophysical Research (JGR): Space Physics. 4638-4651.
  • Laundal, Karl Magnus; Reistad, Jone Peter; Finlay, Christopher C.; Østgaard, Nikolai; Tenfjord, Paul; Snekvik, Kristian; Ohma, Anders. 2018. Interplanetary Magnetic Field Bx Component Influence on Horizontal and Field-Aligned Currents in the Ionosphere. Journal of Geophysical Research (JGR): Space Physics. 3360-3379.
  • Tenfjord, Paul; Østgaard, Nikolai; Haaland, Stein; Snekvik, Kristian; Laundal, Karl Magnus; Reistad, Jone Peter; Strangeway, Robert J.; Milan, Stephen Eric; Hesse, Michael; Ohma, Anders. 2018. How the IMF By Induces a Local By Component During Northward IMF Bz and Characteristic Timescales. Journal of Geophysical Research (JGR): Space Physics. 3333-3348.
  • Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Snekvik, Kristian; Haaland, Stein; Fillingim, Matthew. 2018. Evolution of Asymmetrically Displaced Footpoints During Substorms. Journal of Geophysical Research (JGR): Space Physics. 10,030-10,063.
  • Milan, Stephen Eric; Clausen, Lasse Boy Novock; Coxon, John Charles; Carter, Jenny A.; Walach, Maria Theresia; Laundal, Karl Magnus; Østgaard, Nikolai; Tenfjord, Paul Arne Riksheim; Reistad, Jone Peter; Snekvik, Kristian; Korth, Haje; Anderson, Brian J. 2017. Overview of solar wind - magnetosphere - ionosphere - atmosphere coupling and the generation of magnetospheric currents. Space Science Reviews. 547-573.
  • Haaland, Stein; Lybekk, Bjørn; Maes, Lukas; Laundal, Karl Magnus; Pedersen, Amund; Tenfjord, Paul; Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Snekvik, Kristian. 2017. North-south asymmetries in cold plasma density in the magnetotail lobes: Cluster observations. Journal of Geophysical Research (JGR): Space Physics. 136-149.
  • Friis-Christensen, Eigil; Finlay, Christopher C.; Hesse, Michael; Laundal, Karl Magnus. 2017. Magnetic field perturbations from currents in the dark polar regions during quiet geomagnetic conditions. Space Science Reviews. 281-297.
  • Snekvik, Kristian; Østgaard, Nikolai; Tenfjord, Paul; Reistad, Jone Peter; Laundal, Karl Magnus; Milan, Stephen Eric; Haaland, Stein. 2017. Dayside and nightside magnetic field responses at 780 km altitude to dayside reconnection. Journal of Geophysical Research (JGR): Space Physics. 1670-1689.
  • Laundal, Karl Magnus; Gjerløv, Jesper; Østgaard, Nikolai; Reistad, Jone Peter; Haaland, Stein; Snekvik, Kristian; Tenfjord, Paul; Ohtani, Shin-ichi; Milan, Steve. 2016. The impact of sunlight on high-latitude equivalent currents. Journal of Geophysical Research (JGR): Space Physics. 2715-2726.
  • Laundal, Karl Magnus; Finlay, Christopher C.; Olsen, NIls. 2016. Sunlight effects on the 3D polar current system determined from low Earth orbit measurements. Earth Planets and Space.
  • Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul Arne Riksheim; Laundal, Karl Magnus; Snekvik, Kristian; Milan, Steve; Haaland, S. 2016. Mechanisms that Produce Auroral Asymmetries in Conjugate Hemispheres. Geophysical Monograph.
  • Tenfjord, Paul Arne Riksheim; Østgaard, Nikolai; Strangeway, Robert J.; Haaland, Stein; Snekvik, Kristian; Laundal, Karl Magnus; Reistad, Jone Peter; Milan, Stephen Eric. 2016. Magnetospheric response and reconfiguration times following IMF By reversals. Journal of Geophysical Research (JGR): Space Physics. 417-431.
  • Laundal, Karl Magnus; Richmond, Arthur D. 2016. Magnetic coordinate systems. Space Science Reviews. 1-33.
  • Reistad, Jone Peter; Østgaard, Nikolai; Tenfjord, Paul; Laundal, Karl Magnus; Snekvik, Kristian; Haaland, Stein; Milan, Steve; Oksavik, Kjellmar; Frey, Harald U.; Grocott, Adrian. 2016. Dynamic effects of restoring footpoint symmetry on closed magnetic field lines. Journal of Geophysical Research (JGR): Space Physics. 3963-3977.
  • Tenfjord, Paul; Østgaard, Nikolai; Snekvik, Kristian; Laundal, Karl Magnus; Reistad, Jone Peter; Haaland, Stein; Milan, Steve. 2015. How the IMF By induces a By component in the closed magnetosphere and how it leads to asymmetric currents and convection patternsin the two hemispheres. Journal of Geophysical Research (JGR): Space Physics. 9368-9384.
  • Laundal, Karl Magnus; Haaland, Stein; Lehtinen, Nikolai; Gjerløv, Jesper; Østgaard, Nikolai; Tenfjord, Paul; Reistad, Jone Peter; Snekvik, Kristian; Milan, Steve; Ohtani, Shin-ichi; Anderson, Brian J. 2015. Birkeland current effects on high-latitude ground magnetic field perturbations. Geophysical Research Letters. 7248-7254.
  • Laundal, Karl Magnus; Gjerløv, Jesper. 2014. What is the appropriate coordinate system for magnetometer data when analyzing ionospheric currents? Journal of Geophysical Research (JGR): Space Physics. 8637-8647.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Haaland, Stein; Tenfjord, Paul; Snekvik, Kristian; Oksavik, Kjellmar; Milan, Steve. 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.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Oksavik, Kjellmar. 2013. On the non-conjugacy of nightside aurora and their generator mechanisms. Journal of Geophysical Research (JGR): Space Physics. 3394-3406.
  • Søraas, Finn; Laundal, Karl Magnus; Usanova, Maria E. 2013. Coincident particle and optical observations of nightside subauroral proton precipitation. Journal of Geophysical Research (JGR): Space Physics. 1112-1122.
  • Østgaard, Nikolai; Laundal, Karl Magnus; Juusola, Liisa; Aasnes, A.; Haaland, S.; Weygand, James M. 2012. Correction to 'Interhemispherical asymmetry of substorm onset locations and the Interplanetary Magnetic Field.'. Geophysical Research Letters.
  • Snekvik, Kristian; Tanskanen, Eija Irene; Østgaard, Nikolai; Juusola, Liisa; Laundal, Karl Magnus; Gordeev, Evigini I.; Borg, Anette Lauen. 2012. Changes in the magnetotail configuration before near-Earth reconnection. Journal of Geophysical Research (JGR): Space Physics. 12 sider.
  • Østgaard, Nikolai; Laundal, Karl Magnus; Juusola, Liisa; Åsnes, Arne; Haaland, Stein; Weygand, James M. 2011. Interhemispherical asymmetry of substorm onset locations and the interplanetary magnetic field. Geophysical Research Letters. 5 sider.
  • Østgaard, Nikolai; Humberset, Beate Krøvel; Laundal, Karl Magnus. 2011. Evolution of auroral asymmetries in the conjugate hemispheres during two substorms. Geophysical Research Letters. 6 sider.
  • Hegna, Torunn; Pettersson, Hans; Laundal, Karl Magnus; Grujic, Katarina. 2011. 3-D laser scanner system based on a galvanometer scan head for high temperature applications. Proceedings of SPIE, the International Society for Optical Engineering. 9 sider.
  • Laundal, Karl Magnus; Østgaard, Nikolai; Frey, H. U.; Weygand, J. 2010. Seasonal and interplanetary magnetic field-dependent polar cap contraction during substorm expansion phase. Journal of Geophysical Research (JGR): Space Physics. A11224.
  • Laundal, Karl Magnus; Østgaard, Nikolai; Snekvik, Kristian; Frey, Harald U. 2010. Interhemispheric observations of emerging polar cap asymmetries. Journal of Geophysical Research (JGR): Space Physics. 15 sider.
  • Laundal, Karl Magnus; Østgaard, Nikolai. 2009. Asymmetric auroral intensities in the Earth's Northern and Southern hemispheres. Nature. 491-493.
  • Laundal, Karl Magnus; Østgaard, Nikolai. 2008. Persistent global proton aurora caused by high solar wind dynamic pressure. Journal of Geophysical Research (JGR). 8 sider.
Faglig foredrag
  • Laundal, Karl Magnus; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Snekvik, Kristian. 2014. Seasonal differences in ionospheric current rise and decay times.
Vitenskapelig foredrag
  • Kwagala, Norah Kaggwa; Oksavik, Kjellmar; Lorentzen, Dag Arne; Johnsen, Magnar Gullikstad; Laundal, Karl Magnus. 2019. Thermally excited 630.0 nm emissions in the polar ionosphere.
  • Hatch, Spencer Mark; Moretto, Therese; Laundal, Karl Magnus. 2019. The relative importance of diamagnetic effects in the high-latitude ionosphere.
  • Hatch, Spencer Mark; Moretto, Therese; Laundal, Karl Magnus; Bjoland, Lindis Merete; Haaland, Stein; Yau, Andrew. 2019. Swarm as a platform for ion outflow studies.
  • Hatch, Spencer Mark; Moretto, Therese; Laundal, Karl Magnus. 2019. Southern and Northern Hemisphere relationships between ion outflow and magnetic field fluctuations .
  • Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Moretto, Therese; Haaland, Stein; Krcelic, Patrik; Milan, Stephen Eric. 2019. Observations of Asymmetric Lobe Convection for Weak and Strong Tail Reconnection.
  • Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus. 2019. How asymmetries in Geospace evolve during increased tail reconnection.
  • Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus. 2019. How Asymmetries in Geospace Evolve During Substorms.
  • Hatch, Spencer Mark; Moretto, Therese; Laundal, Karl Magnus. 2019. FAST observations of cusp/cleft-region ion upflow and field variations.
  • Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Moretto, Therese; Haaland, Stein; Krcelic, Patrik; Milan, S. E. 2019. Cluster EDI Observations of the Asymmetric Plasma Convection in the Magnetotail Lobes During Different Levels of Tail Reconnection Rate .
  • Reistad, Jone Peter; Laundal, Karl Magnus; Ohma, Anders; Østgaard, Nikolai; Thomas, Evan G.; Haaland, Stein; Oksavik, Kjellmar; Milan, Stephen Eric. 2019. A new way to identify and quantify the sources of ionospheric convection.
  • Reistad, Jone Peter; Laundal, Karl Magnus; Østgaard, Nikolai; Ohma, Anders; Snekvik, Kristian; Tenfjord, Paul. 2018. Plasma circulation inside the polar cap and lobe reconnection.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Tenfjord, Paul; Snekvik, Kristian; Haaland, Stein; Milan, Stephen Eric; Ohma, Anders; Grocott, Adrian; Oksavik, Kjellmar. 2017. The influence of plasma flows bringing the magnetotail back to a more symmetric configuration.
  • Herland, Egil Vålandsmyr; Finlay, Christopher C.; Olsen, Nils; Edvardsen, Inge; Nordgård-Hansen, Ellen Marie; Laundal, Karl Magnus; Waag, Tor Inge. 2017. The CHAOS-X Model and Uncertainty Values for Magnetic Directional Surveying.
  • Laundal, Karl Magnus; Reistad, Jone Peter; Tenfjord, Paul; Snekvik, Kristian; Østgaard, Nikolai; Ohma, Anders. 2017. Seasonal and IMF-controlled variations in the large-scale true horizontal ionospheric current.
  • Laundal, Karl Magnus. 2017. Production and visualization of a climatological model of high-latitude ionospheric and field aligned current systems.
  • Laundal, Karl Magnus; Østgaard, Nikolai. 2017. Norwegian contributions to the ISWI program.
  • Laundal, Karl Magnus; Finlay, Christopher C.; Olsen, NIls; Reistad, Jone Peter; Tenfjord, Paul; Østgaard, Nikolai; Ohma, Anders; Snekvik, Kristian; Haaland, Stein; Milan, Stephen Eric. 2017. North-south asymmetries in polar ionospheric currents - effects of asymmetries in the main magnetic field.
  • Haaland, Stein; Laundal, Karl Magnus; Lybekk, Bjørn; Baddeley, Lisa; Bjoland, Lindis Merete; Pedersen, Arne; Tenfjord, Paul; Østgaard, Nikolai; Gustavsson, Björn Johan; Reistad, Jone Peter; Snekvik, Kristian; Ohma, Anders. 2017. North-south asymmetries in lobe density: Cluster observations.
  • Haaland, Stein; Lybekk, Bjørn; Maes, Lukas; Laundal, Karl Magnus; Baddeley, Lisa; Bjoland, Lindis Merete; Pedersen, Arne; Tenfjord, Paul; Østgaard, Nikolai; Gustavsson, Björn Johan; Reistad, Jone Peter; Snekvik, Kristian; Ohma, Anders. 2017. North-South asymmetries in cold plasma density.
  • Tenfjord, Paul; Haaland, Stein; Laundal, Karl Magnus; Milan, Steve; Reistad, Jone Peter; Snekvik, Kristian; Østgaard, Nikolai. 2017. How the IMF By induces a By-component on closed field lines during northward IMF Bz.
  • Laundal, Karl Magnus. 2017. High latitude currents and convection during quiet times.
  • Laundal, Karl Magnus; Finlay, Christopher C.; Olsen, NIls; Reistad, Jone Peter; Tenfjord, Paul. 2017. Hemispherical differences in the Ionospheric current system as seen by Swarm and CHAMP.
  • Snekvik, Kristian; Østgaard, Nikolai; Tenfjord, Paul; Reistad, Jone Peter; Laundal, Karl Magnus; Milan, Stephen Eric; Haaland, Stein. 2017. Dayside and nightside magnetic field responses at 780 km altitude to dayside reconnection.
  • Laundal, Karl Magnus; Finlay, Christopher C.; Olsen, NIls; Reistad, Jone Peter; Tenfjord, Paul; Østgaard, Nikolai; Ohma, Anders; Snekvik, Kristian; Haaland, Stein; Milan, Stephen Eric. 2017. Characterizing external influence on the large-scale polar ionospheric current system.
  • Laundal, Karl Magnus; Olsen, N; Finlay, C; Østgaard, Nikolai; Tenfjord, Paul; Reistad, Jone Peter; Snekvik, Kristian. 2015. Statistical maps of Birkeland currents from Swarm magnetometer measurements.
  • Tenfjord, Paul; Østgaard, Nikolai; Haaland, Stein; Laundal, Karl Magnus; Milan, Steve; Reistad, Jone Peter; Snekvik, Kristian. 2015. On which timescales are By induced in the closed magnetosphere?
  • Haaland, Stein; Foerster, Matthias; Laundal, Karl Magnus; Maes, Lukas; Baddeley, Lisa; McKracken, Ken; Lybekk, Bjørn; Pedersen, Arne. 2015. North-south asymmetries in magnetospheric and ionospheric plasma circulation (Invited).
  • Snekvik, Kristian; Laundal, Karl Magnus; Østgaard, Nikolai; Tenfjord, Paul; Reistad, Jone Peter; Milan, Steve; Haaland, Stein. 2015. Magnetic field patterns near the polar cap boundary.
  • Tenfjord, Paul; Snekvik, Kristian; Østgaard, Nikolai; Laundal, Karl Magnus; Reistad, Jone Peter; Milan, Steve; Haaland, Stein. 2015. Generation of Birkeland Currents during IMF By; Mechanisms and theory.
  • Laundal, Karl Magnus; Förster, Matthias; Haaland, Stein; Snekvik, Kristian; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Milan, Steve. 2015. Effects of electric field component representation on estimated cross polar cap potential - Implications for interhemispheric asymmetries.
  • Laundal, Karl Magnus; Förster, Matthias; Snekvik, Kristian; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Milan, Steve. 2015. Effects of electric field component representation on estimated cross polar cap potential - Implications for interhemispheric asymmetries.
  • Rexer, Theresa; Østgaard, Nikolai; Reistad, Jone Peter; Laundal, Karl Magnus. 2015. Current systems associated with Non-Conjugate Aurora.
  • Reistad, Jone Peter; Østgaard, Nikolai; Tenfjord, Paul; Snekvik, Kristian; Laundal, Karl Magnus; Milan, Steve; Oksavik, Kjellmar. 2015. Are there auroral signatures related to asymmetric generation of field-aligned currents in the tail due to an IMF By induced twist?
  • Laundal, Karl Magnus; Grujic, Katarina; Hegna, Torunn; Daae Lampe, Ove; Svardal, Benny. 2014. Techniques for fast measurement of cylinder diameter outdoors.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Snekvik, Kristian; Tenfjord, Paul; Oksavik, Kjellmar. 2014. Hemispheric differences in solar wind – magnetosphere interactions.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Oksavik, Kjellmar. 2014. Conjugate and non-conjugate aspects of the aurora.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Haaland, Stein; Tenfjord, Paul; Oksavik, Kjellmar. 2014. Comparison of solar wind driving of the aurora in the two hemispheres due to the solar wind dynamo.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Haaland, S.; Tenfjord, Paul; Oksavik, Kjellmar. 2014. Comparison of solar wind driving of the aurora in the two hemispheres due to solar wind dynamo.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Haaland, Stein; Tenfjord, Paul; Snekvik, Kristian; Oksavik, Kjellmar; Milan, Steve. 2014. Asymmetric Solar Wind dynamo efficiency and IMF Bx.
  • Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus. 2013. What are the mechanisms that produce auroral asymmetries in the conjugate hemispheres?
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Oksavik, Kjellmar. 2013. Simultaneous global imaging as a tracer of true conjugate regions.
  • Laundal, Karl Magnus; Østgaard, Nikolai; Reistad, Jone Peter; Oksavik, Kjellmar. 2013. Non-Conjugate Features in the Auroral Ovals in the two Hemispheres.
  • Reistad, Jone Peter; Haaland, Stein; Østgaard, Nikolai; Laundal, Karl Magnus; Tenfjord, Paul; Oksavik, Kjellmar. 2013. Investigation of the role of IMF Bx on magnetopause characteristic past the terminator.
  • Reistad, Jone Peter; Haaland, Stein; Østgaard, Nikolai; Laundal, Karl Magnus; Tenfjord, Paul Arne Riksheim; Oksavik, Kjellmar. 2013. Investigation of a possible IMF Bx influence on magnetopause characteristics.
  • Reistad, Jone Peter; Haaland, Stein; Østgaard, Nikolai; Laundal, Karl Magnus; Tenfjord, Paul; Oksavik, Kjellmar. 2013. Investigation of a possible IMF Bx influence on magnetopause characteristic.
  • Tenfjord, Paul; Østgaard, Nikolai; Haaland, Stein; Reistad, Jone Peter; Laundal, Karl Magnus. 2013. Inter-hemispheric currents in the ring current region.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Tenfjord, Paul; Oksavik, Kjellmar; Haaland, Stein. 2013. Intensity asymmetries between the northern and southern auroral ovals associated with the x-component of the Interplanetary Magnetic Field.
  • Søraas, Finn; Laundal, Karl Magnus. 2011. Particle and optical observations of subauroral proton precipitation.
  • Søraas, Finn; Sørbø, Marita; Laundal, Karl Magnus. 2011. Observations of energetic protons and auroral light during geomagnetic storms.
  • Østgaard, Nikolai; Humberset, Beate Krøvel; Laundal, Karl Magnus; Frey, H. U.; Sigwarth, J. B.; Aasnes, A.; Weygand, J. 2011. Auroral asymmetries in the conjugate hemispheres during substorm onset and expansion phase.
  • Østgaard, Nikolai; Laundal, Karl Magnus; Stadsnes, Johan. 2011. Auroral asymmetries in the conjugate hemispheres.
  • Østgaard, Nikolai; Humberset, Beate Krøvel; Juusola, Liisa; Laundal, Karl Magnus; Haaland, Stein; Aasnes, A.; Weygand, J. 2011. Asymmetries of substorm onset location and the dynamic behavior of auroral substorms during expansion phase.
  • Østgaard, Nikolai; Humberset, Beate Krøvel; Laundal, Karl Magnus; Frey, H.U.; Sigwarth, J.B.; Åsnes, Arne; Weygand, James M. 2009. Substorm auroral asymmetries in the conjugate hemispheres during onset and expansion phase.
  • Laundal, Karl Magnus; Østgaard, Nikolai. 2009. IPY-ICESTAR Arctic Frontiers.
  • Laundal, Karl Magnus; Østgaard, Nikolai. 2009. IMF Bx Effects on Interhemispheric Polar Cap Asymmetries Inferred From Conjugate Auroral Imaging.
  • Laundal, Karl Magnus; Østgaard, Nikolai. 2009. Conjugate aurora observations of substorms IAGA meeting.
  • Laundal, Karl Magnus; Østgaard, Nikolai. 2009. Asymmetric aurora detected in the two hemispheres simultaneously.
  • Østgaard, Nikolai; Laundal, Karl Magnus. 2009. Asymmetric aurora detected in the two hemispheres simultaneously.
  • Østgaard, Nikolai; Laundal, Karl Magnus. 2009. Asymmetric aurora detected in the two hemispheres simultaneously.
  • Østgaard, Nikolai; Åsnes, Arne; Pedersen, A.; Borg, A.L.; Phan, T.D.; Øieroset, Marit; Snekvik, Kristian; Laundal, Karl Magnus. 2008. What are the ionospheric signatures of magnetotail reconnection?
  • Laundal, Karl Magnus; Østgaard, Nikolai. 2008. Conjugate observations of substorm onset and expansion in the two hemispheres.
  • Laundal, Karl Magnus; Østgaard, Nikolai. 2008. Conjugate imaging of substorms.
  • Østgaard, Nikolai; Laundal, Karl Magnus. 2008. Auroral conjugacy studies.
  • Laundal, Karl Magnus; Østgaard, Nikolai. 2007. Solar wind pressure as a cause for persistent proton precipitation.
Mastergradsoppgave
  • Laundal, Karl Magnus. 2007. Storm Time Observations of the Global Proton Aurora.
Doktorgradsavhandling
  • Laundal, Karl Magnus. 2010. Auroral Imaging as a Tracer of Global Magnetospheric Dynamics.
Poster
  • Reistad, Jone Peter; Laundal, Karl Magnus; Østgaard, Nikolai; Ohma, Anders; Thomas, Evan G.; Haaland, Stein; Oksavik, Kjellmar; Milan, Stephen Eric. 2019. Quantifying the dipole tilt influence on reverse convection cells during northward IMF using spherical elementary functions.
  • Reistad, Jone Peter; Laundal, Karl Magnus; Ohma, Anders; Østgaard, Nikolai; Thomas, Evan G.; Haaland, Stein; Oksavik, Kjellmar; Milan, Steve. 2019. A new way to identify and quantify the sources of ionospheric convection.
  • Tenfjord, Paul; Østgaard, Nikolai; Reistad, Jone Peter; Snekvik, Kristian; Haaland, Stein; Milan, Steve; Laundal, Karl Magnus; Hesse, Michael; Strangeway, R. J. 2018. How the IMF BY induces a BY component on closed field lines during northward IMF Bz and characteristic timescales.
  • Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Snekvik, Kristian; Fillingim, Matthew. 2018. Evolution of asymmetrically displaced footpoints during substorms.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Tenfjord, Paul Arne Riksheim; Snekvik, Kristian; Haaland, Stein; Milan, Stephen Eric; Ohma, Anders; Grocott, Adrian; Oksavik, Kjellmar. 2017. When and where is the process of restoring symmetry important?
  • Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Rexer, Theresa; Haaland, Stein; Snekvik, Kristian; Hesse, Michael; Milan, Steve. 2017. The asymmetric geospace - the most common state of the system.
  • Tenfjord, Paul; Haaland, Stein; Laundal, Karl Magnus; Milan, Steve; Reistad, Jone Peter; Snekvik, Kristian; Østgaard, Nikolai. 2017. How the IMF By induces a By-component on closed field lines during northward IMF Bz.
  • Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Snekvik, Kristian. 2017. Evolution of asymmetrically displaced footpoints during substorms.
  • Ohma, Anders; Østgaard, Nikolai; Reistad, Jone Peter; Tenfjord, Paul; Laundal, Karl Magnus; Snekvik, Kristian; Fillingim, M. 2017. Evolution of asymmetrically displaced footpoints during substorms.
  • Haaland, Stein; Laundal, Karl Magnus; Maes, Lukas; Baddeley, Lisa; Lybekk, Bjørn. 2016. North-south asymmetries in cold ion outflow and lobe density.
  • Tenfjord, Paul Arne Riksheim; Østgaard, Nikolai; Haaland, Stein; Laundal, Karl Magnus; Milan, Steve; Reistad, Jone Peter; Snekvik, Kristian; Strangeway, Robert J. 2016. How the IMF By induces a By component on closed field lines during northward IMF Bz.
  • Reistad, Jone Peter; Østgaard, Nikolai; Tenfjord, Paul Arne Riksheim; Laundal, Karl Magnus; Snekvik, Kristian; Haaland, Stein; Milan, Steve E.; Oksavik, Kjellmar; Frey, Harald U.; Grocott, Adrian. 2016. Dynamic effects of restoring footpoint symmetry on closed magnetic field-lines: Asymmetric Birkeland currents.
  • Tenfjord, Paul; Østgaard, Nikolai; Haaland, Stein; Milan, Steve; Laundal, Karl Magnus; Reistad, Jone Peter; Snekvik, Kristian. 2015. The Impact of IMF By on the Magnetosphere-Ionosphere System.
  • Reistad, Jone Peter; Østgaard, Nikolai; Tenfjord, Paul; Laundal, Karl Magnus; Snekvik, Kristian; Haaland, Stein; Milan, Steve E.; Oksavik, Kjellmar; Frey, Harald U.; Grocott, Adrian. 2015. On the importance of magnetotail untwisting.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Tenfjord, Paul; Snekvik, Kristian; Milan, Steve; Haaland, Stein; Frey, Harald U.; Grocott, Adrian. 2015. On the importance of magnetotail untwist.
  • Laundal, Karl Magnus; Haaland, Stein; Østgaard, Nikolai; Reistad, Jone Peter; Snekvik, Kristian; Milan, Steve; Gjerloev, Jesper W. 2015. Birkeland Current Effects on High-Latitude Ground Magnetic Field Perturbations.
  • Laundal, Karl Magnus; Gjerloev, Jesper W. 2014. What is the Appropriate Coordinate System for Magnetometer Data when Analyzing Ionospheric Currents?
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Haaland, Stein; Tenfjord, Paul; Snekvik, Kristian; Oksavik, Kjellmar; Milan, Steve. 2014. Hemispheric asymmetries in the global aurora and IMF Bx.
  • Tenfjord, Paul; Østgaard, Nikolai; Reistad, Jone Peter; Snekvik, Kristian; Laundal, Karl Magnus; Haaland, Stein; Milan, S. E. 2014. Generation of Field Aligned Currents during IMF By: Mechanisms and theory.
  • Laundal, Karl Magnus; Østgaard, Nikolai; Reistad, Jone Peter. 2013. Solar wind dynamic pressure effect on global auroral intensity.
  • Tenfjord, Paul; Østgaard, Nikolai; Reistad, Jone Peter; Haaland, Stein; Laundal, Karl Magnus. 2013. Inter-hemispheric currents in the ring current region as seen by the Cluster spacecraft.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Oksavik, Kjellmar. 2013. How IMF Bx affects the two polar hemispheres differently.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Oksavik, Kjellmar. 2013. How IMF Bx affects the two hemispheres differently.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Haaland, Stein; Oksavik, Kjellmar. 2013. Auroral intensity asymmetries associated with the x-component of the interplanetary magnetic field in the two polar hemispheres.
  • Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Oksavik, Kjellmar. 2012. Non-conjugate aurora and inter hemispheric currents.
  • Reistad, Jone Peter; Østgaard, Nikolai; Oksavik, Kjellmar; Laundal, Karl Magnus. 2012. Asymmetric field-aligned currents in the conjugate hemispheres.
  • Humberset, Beate Krøvel; Østgaard, Nikolai; Laundal, Karl Magnus. 2009. A case study of auroral conjugacy based on global imaging.
  • Laundal, Karl Magnus; Østgaard, Nikolai. 2008. Auroral asymmetries in the conjugate hemispheres during strong IMF Bx.
Errata
  • Østgaard, Nikolai; Laundal, Karl Magnus; Humberset, Beate Krøvel. 2013. Correction to 'Evolution of auroral asymmetries in the conjugate hemispheres during two substorms.'. Geophysical Research Letters. 471-471.
Vitenskapelig oversiktsartikkel/review
  • Laundal, Karl Magnus; Cnossen, Ingrid; Milan, Stephen Eric; Haaland, Stein; Coxon, John C.; Pedatella, Nick; Förster, Matthias; Reistad, Jone Peter. 2016. North–south asymmetries in Earth’s magnetic field effects on high-latitude geospace. 225-257.
  • Grujic, Katarina; Hegna, Torunn; Laundal, Karl Magnus. 2012. In situ monitoring of growth interfaces: a review of noninvasive methods. 96-101.
Populærvitenskapelig kapittel/artikkel
  • Ellingsen, Pål Gunnar; Baddeley, Lisa; Lorentzen, Dag Arne; Østgaard, Nikolai; Sigernes, Fred; Gjerloev, Jesper W.; Laundal, Karl Magnus; Tyssøy, Hilde Nesse; Strømme, Anja. 2016. Auroral research and the total solar eclipse. 13 sider.

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