The Earth magnetosphere protects us from harmful and highly variable solar wind environments. After four decades’ studies, the influence of the dynamic pressure and BZ interplanetary magnetic field (IMF) component is relatively clear now. Nevertheless, recent studies showed the IMF orientation could also be a significant factor for the variety of magnetosphere configurations and processes. The bow shock can have a different structure, the magnetopause and its reconnection location can change with different IMF orientations. However, the solar wind is modified at the bow shock, but the processes in the magnetosheath are still not well understood. In this regard, the magnetospheric system's reactions to different IMF orientations become as a topic that should be discussed in depth. In this Ph.D. work, the student will focus on the interaction between the dayside magnetosphere and the IMF orientation, especially on the variations of in the magnetosheath using data from spacecraft measurements in the solar wind and magnetosheath (Wind, OMNI, THEMIS, MMS, etc.). It is expected that the student will develop tools for constructing magnetosheath parameter profiles with an emphasis on the magnetopause vicinity.
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[2] Dušík, Š; Granko, G; Šafránková, J; Němeček, Z; Jelínek, K, IMF cone angle control of the magnetopause location: Statistical study, Geophys. Res. Lett., 37, L19103, 2010.
[3] Grygorov, K; Šafránková, J; Němeček, Z; Pi, G; Přech, L; Urbář, J, Shape of the equatorial magnetopause affected by the radial interplanetary magnetic field, Planet Space Sci., 148: 28–34, 2017.
[4] Pi, G; Shue, J-H; Park, J-S; Chao, J-K; Yang, Y-H; Lin, C-H, A comparison of the IMF structure and the magnetic field in the magnetosheath under the radial IMF conditions, Adv. Space Res., 58 (2): 181–187, 2016.
[5] Park, J-S; Shue, J-H; Kim, K-H; Pi, G; Němeček, Z; Šafránková, J, Global expansion of the dayside magnetopause for long-duration radial IMF events: Statistical study on GOES observations, J. Geophys. Res. Space Phys., 121 (7): 6480–6492, 2016.
[6] Huang, T; Wang, H; Shue, J-H; Cai, L; Pi, G, The dayside magnetopause location during radial interplanetary magnetic field periods: Cluster observation and model comparison, Ann. Geophys., 33 (4): 437–448, 2015.
[7] Pi, G; Shue, J-H; Chao, J-K; Nemecek, Z; Safrankova, J; Lin, C-H, A reexamination of long-duration radial IMF events, J. Geophys. Res. Space Phys., 119 (9): 7005–7011, 2014.