Student: Ghosh Mrittika
Školitel: Gilbert Pi, Ph.D.
Konzultant: Prof. RNDr. Jana Šafránková, DrSc.
Stav práce: zadaná
Anotace:
Nowadays, accurate space weather forecasting becomes one of important means for avoiding damage of satellites as well as ground based power and communication systems by solar storms. Although this topic is studied for decades, we still do not understand well all processes in the solar wind – magnetosphere system. We know that the solar wind dynamic pressure and orientation of the interplanetary magnetic field (IMF) Bz component are the most critical factors controlling space weather effects. However, recent studies have shown that not only Bz component but also the magnitude and orientation of the full IMF vector are significant for the variety of magnetospheric configurations and processes. Previous studies revealed that the bow shock structure can vary and the reconnection location at the magnetopause can change with the IMF direction but details of this direction still need to be clarified, thus the reaction of the magnetospheric system to different IMF orientations is a topic that should be discussed in depth. In the Ph.D. thesis, the student is supposed to focus on the dynamics of the dayside magnetosphere under different IMF orientations with an emphasis on the radial IMF using spacecraft measurements in the solar wind, magnetosheath and magnetosphere (Wind, OMNI, THEMIS, MMS, etc.). It is expected that the student will clarify mechanisms of reaction of magnetospheric systems on upstream forcing and improve the accuracy of space weather forecasting.
Literature:
[1] P. Song, H. J. Singer, G. L. Siscoe (Eds.): Space Weather. AGU, Geophysical Monograph 125, Washington, DC. 2001.
[2] M. G. Kivelson, C. T. Russell: Introduction to Space Physics. University Press, Cambridge 1995.
[3] W. Baumjohann, R. A. Treumann: Basic Space Plasma Physics. Imperial College Press, London 1999, ISBN 1-86094-079-X.
[4] A basic list of papers dealing with the radial IMF: Pi, G; Němeček, Z; Šafránková, J; Grygorov, K; Shue, J-H., J. Geophys. Res. Space Phys., 123 (5): 3533–3547, 2018; Dušík, Š; Granko, G; Šafránková, J; Němeček, Z; Jelínek, K, Geophys. Res. Lett., 37, L19103, 2010; Grygorov, K; Šafránková, J; Němeček, Z; Pi, G; Přech, L; Urbář, J, Planet Space Sci., 148: 28–34, 2017; Pi, G; Shue, J-H; Park, J-S; Chao, J-K; Yang, Y-H; Lin, C-H, Adv. Space Res., 58 (2): 181–187, 2016; Park, J-S; Shue, J-H; Kim, K-H; Pi, G; Němeček, Z; Šafránková, J, J. Geophys. Res. Space Phys., 121 (7): 6480–6492, 2016; Huang, T; Wang, H; Shue, J-H; Cai, L; Pi, G, Ann. Geophys., 33 (4): 437–448, 2015; Pi, G; Shue, J-H; Chao, J-K; Nemecek, Z; Safrankova, J; Lin, C-H, J. Geophys. Res. Space Phys., 119 (9): 7005–7011, 2014.