EGU General Assembly 2020
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Variations of Pressure Profiles from the Bow Shock to Magnetopause

Gilbert Pi, Zdeněk Němeček, and Jana Šafránková
Gilbert Pi et al.
  • Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Prague, Czechia (

Numerous simulation results have shown that the spatial profiles of a thermal pressure from the bow shock to the magnetopause are determined by the upstream interplanetary magnetic field (IMF) orientation. The southward IMF conditions lead to an increasing trend of thermal pressure with a maximum near the magnetopause. In contrast, the thermal pressure increases on the plasma entry to the  magnetosheath, but this trend turns to a decreasing one after passing a middle point between the bow shock and magnetopause during northward IMF intervals. In the present study, we show the observation results, both particular events and statistics, to check the variations of pressure profiles in the magnetosheath and their relation to upstream IMF conditions. THEMIS-C observartions during 2007–2009 are used. The profiles near the Sun–Earth line and the global pressure distribution in the dayside equatorial magnetosheath are shown.

How to cite: Pi, G., Němeček, Z., and Šafránková, J.: Variations of Pressure Profiles from the Bow Shock to Magnetopause, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-2443,, 2020.