Case Studies of Ionospheric Plasma Irregularities Over Queen Maud Land, Antarctica

다국어 초록 (Multilingual Abstract)

We use the first data set from the ground‐based TEC and scintillation receiver located at the Norwegian Research Station Troll in Queen Maud Land, Antarctica to analyze in detail the ionospheric response during geomagnetic disturbances on February 26–27 and March 18–19, 2018. By combining the Troll data with complementary measurements (scintillation receivers, magnetometers, SuperDARN, DMSP satellites), we demonstrate that plasma irregularities above this part of Queen Maud Land can be associated with the expansion of the auroral oval, related structuring on its edges, as well as with strong flow shears in the evening and at nighttime, which are further modulated by the energetic particle precipitation. Phase scintillation indices correlate well with the magnetometer data.



Plasma irregularities over Troll and SANAE‐4 stations in Queen Maud Land, Antarctica are associated with the edges of expanding auroral oval

Plasma irregularities are related to strong plasma flow shears modulated by auroral particle precipitations

Ionospheric structuring is reflected in enhanced phase scintillation index


Plasma irregularities over Troll and SANAE‐4 stations in Queen Maud Land, Antarctica are associated with the edges of expanding auroral oval
Plasma irregularities are related to strong plasma flow shears modulated by auroral particle precipitations
Ionospheric structuring is reflected in enhanced phase scintillation index