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Anders Ohma's picture

Anders Ohma

Postdoctoral Fellow
Department of Physics and Technology
  • E-mailanders.ohma@uib.no
  • Visitor Address
    Allégaten 55
    5007 Bergen
  • Postal Address
    Postboks 7803
    5020 Bergen
Academic article
  • Show author(s) (2023). Statistical Temporal Variations in the Auroral Electrojet Estimated With Ground Magnetometers in Fennoscandia. Space Weather.
  • Show author(s) (2022). Transient high latitude geomagnetic response to rapid increases in solar wind dynamic pressure. Frontiers in Astronomy and Space Sciences.
  • Show author(s) (2022). The relationship between interhemispheric asymmetries in polar ionospheric convection and the magnetic field line footpoint displacement field. Frontiers in Astronomy and Space Sciences.
  • Show author(s) (2022). The Lompe code: A Python toolbox for ionospheric data analysis. Frontiers in Astronomy and Space Sciences. 16 pages.
  • Show author(s) (2022). Local Mapping of Polar Ionospheric Electrodynamics. Journal of Geophysical Research (JGR): Space Physics. 31 pages.
  • Show author(s) (2022). Geomagnetic Response to Rapid Increases in Solar Wind Dynamic Pressure: Event Detection and Large Scale Response. Frontiers in Astronomy and Space Sciences. 1-18.
  • Show author(s) (2022). Evolution of IMF By induced asymmetries during substorms: Superposed epoch analysis at geosynchronous orbit. Frontiers in Astronomy and Space Sciences. 1-13.
  • Show author(s) (2022). Dependence of the global dayside reconnection rate on interplanetary magnetic field B<inf>y</inf> and the earth’s dipole tilt. Frontiers in Astronomy and Space Sciences.
  • Show author(s) (2021). The Magnitude of IMF B<inf>y</inf> Influences the Magnetotail Response to Solar Wind Forcing. Journal of Geophysical Research (JGR): Space Physics.
  • Show author(s) (2021). Quantifying the Lobe Reconnection Rate During Dominant IMF By Periods and Different Dipole Tilt Orientations . Journal of Geophysical Research (JGR): Space Physics. 18 pages.
  • Show author(s) (2021). Modulation of Magnetospheric Substorm Frequency: Dipole Tilt and IMF By Effects. Journal of Geophysical Research (JGR): Space Physics.
  • Show author(s) (2021). Evolution of IMF By Induced Asymmetries: The Role of Tail Reconnection. Journal of Geophysical Research (JGR): Space Physics.
  • Show author(s) (2020). Time-scale dependence of solar wind-based regression models of ionospheric electrodynamics. Scientific Reports.
  • Show author(s) (2020). Seasonal and Hemispheric Asymmetries of F Region Polar Cap Plasma Density: Swarm and CHAMP Observations. Journal of Geophysical Research (JGR): Space Physics. 13 pages.
  • Show author(s) (2020). An Explicit IMF B 𝑦 Dependence on Solar Wind-Magnetosphere Coupling. Geophysical Research Letters. 8 pages.
  • Show author(s) (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.
  • Show author(s) (2019). Separation and quantification of ionospheric convection sources: 1. A new technique. Journal of Geophysical Research (JGR): Space Physics. 6343-6357.
  • Show author(s) (2019). Observations of asymmetric lobe convection for weak and strong tail activity. Journal of Geophysical Research (JGR): Space Physics. 9999-10017.
  • Show author(s) (2018). The asymmetric geospace as displayed during the geomagnetic storm on 17 August 2001. Annales Geophysicae. 1577-1596.
  • Show author(s) (2018). Observations of asymmetries in ionospheric return flow during different levels of geomagnetic activity. Journal of Geophysical Research (JGR): Space Physics. 4638-4651.
  • Show author(s) (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.
  • Show author(s) (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.
  • Show author(s) (2018). Evolution of Asymmetrically Displaced Footpoints During Substorms. Journal of Geophysical Research (JGR): Space Physics. 10,030-10,063.
  • Show author(s) (2017). North-south asymmetries in cold plasma density in the magnetotail lobes: Cluster observations. Journal of Geophysical Research (JGR): Space Physics. 136-149.
Academic lecture
  • Show author(s) (2022). Excitation and Decay of Auroral Flux.
  • Show author(s) (2022). Data Driven Dayglow Detection: Background removal from global FUV images.
  • Show author(s) (2021). Hemispheric and seasonal variations in the cold plasma outflow source region: Swarm and CHAMP observations of F-region polar cap electron density.
  • Show author(s) (2020). Modulation of magnetospheric substorm frequency: Dipole tilt and IMF By effects.
  • Show author(s) (2020). How tail reconnection affects the asymmetric state of the magnetosphere in the LFM model.
  • Show author(s) (2020). Hemispheric and seasonal variations in the cold plasma outflow source region: polar cap ionosphere electron density at 350–500 km.
  • Show author(s) (2019). Observations of Asymmetric Lobe Convection for Weak and Strong Tail Reconnection.
  • Show author(s) (2019). How asymmetries in Geospace evolve during increased tail reconnection.
  • Show author(s) (2019). How Asymmetries in Geospace Evolve During Substorms.
  • Show author(s) (2019). Cluster EDI Observations of the Asymmetric Plasma Convection in the Magnetotail Lobes During Different Levels of Tail Reconnection Rate .
  • Show author(s) (2019). A new way to identify and quantify the sources of ionospheric convection.
  • Show author(s) (2018). Plasma circulation inside the polar cap and lobe reconnection.
  • Show author(s) (2017). The influence of plasma flows bringing the magnetotail back to a more symmetric configuration.
  • Show author(s) (2017). Seasonal and IMF-controlled variations in the large-scale true horizontal ionospheric current.
  • Show author(s) (2017). North-south asymmetries in polar ionospheric currents - effects of asymmetries in the main magnetic field.
  • Show author(s) (2017). North-south asymmetries in lobe density: Cluster observations.
  • Show author(s) (2017). North-South asymmetries in cold plasma density.
  • Show author(s) (2017). Characterizing external influence on the large-scale polar ionospheric current system.
Doctoral dissertation
  • Show author(s) (2019). How Asymmetries in Geospace Evolve During Increased Tail Reconnection .
Poster
  • Show author(s) (2019). Quantifying the dipole tilt influence on reverse convection cells during northward IMF using spherical elementary functions.
  • Show author(s) (2019). A new way to identify and quantify the sources of ionospheric convection.
  • Show author(s) (2018). Evolution of asymmetrically displaced footpoints during substorms.
  • Show author(s) (2017). When and where is the process of restoring symmetry important?
  • Show author(s) (2017). Evolution of asymmetrically displaced footpoints during substorms.
  • Show author(s) (2017). Evolution of asymmetrically displaced footpoints during substorms.
Chapter
  • Show author(s) (2021). Ion Outflow and Lobe Density: Interhemispheric Asymmetries . 127. In:
    • Show author(s) (2021). Space Physics and Aeronomy, Volume 3, Ionosphere Dynamics and Applications. John Wiley & Sons.

More information in national current research information system (CRIStin)