Browsing Det matematisk-naturvitenskapelige fakultet by Author "Kwak, Young-Sil"

Now showing items 1-3 of 3

  • 3-D Regional Imaging of Ionosphere Over Africa Through Assimilating Satellite and Ground-Based Data 
    Mengist, Chalachew Kindie; Seo, Kyong-Hwan; Kim, Yong Ha; Eswaraiah, S.; Ssessanga, Nicholas; Kwak, Young-Sil (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    In this study, the first high-resolution regional ionospheric model over Africa and adjacent areas (−40–40°N latitude, 30°W–60°E longitude, and 80–1,400 km in altitude) is constructed by assimilating ground-based slant ...
  • Observational Evidence for the Role of Hall Conductance in Alfvén Wave Reflection 
    Ivarsen, Magnus Fagernes; Park, Jaeheung; Kwak, Young-Sil; Jin, Yaqi; Knudsen, D. J.; Clausen, Lasse Boy Novock (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Electromagnetic energy carried by magnetohydrodynamic modes is an important mechanism in the energy transfer between the magnetosphere and the ionosphere. Alfvén waves are known to carry field‐aligned currents and thus ...
  • Steepening Plasma Density Spectra in the Ionosphere: The Crucial Role Played by a Strong E-Region 
    Ivarsen, Magnus Fagernes; St-Maurice, Jean-Pierre; Jin, Yaqi; Park, Jaeheung; Miloch, Wojciech Jacek; Spicher, Andres; Kwak, Young-Sil; Clausen, Lasse B. N. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Based on the Swarm 16 Hz Advanced Plasma Density data set, and using the Swarm A satellite, we apply automatic detection of spectral breaks in seven million sampled plasma density power spectra in the high-latitude F-region ...