JpGU-AGU Joint Meeting 2017

Presentation information

[EJ] Oral

P (Space and Planetary Sciences) » P-CG Complex & General

[P-CG24] [EJ] Planetary Magnetosphere, Ionosphere, and Atmosphere

Sun. May 21, 2017 9:00 AM - 10:30 AM 102 (International Conference Hall 1F)

convener:Kanako Seki(Graduate School of Science, University of Tokyo), Yoshiyuki O. Takahashi(Graduate School of Science, Kobe University), Hiromu Nakagawa(Planetary Atmosphere Physics Laboratory, Department of Geophysics, Graduate School of Science, Tohoku University), Keiichiro Fukazawa(Academic Center for Computing and Media Studies, Kyoto University), Chairperson:Manabu Yagi(RIKEN Advanced Institute for Computational Science), Chairperson:Keiichiro Fukazawa(Academic Center for Computing and Media Studies, Kyoto University)

9:36 AM - 9:54 AM

[PCG24-03] Juno observations of Jupiter’s dawnside magnetopause boundary layer

*Daniel J Gershman1,2, Gina DiBraccio3,2, John Connerney2,4, George Hospodarsky5, William Kurth5, Robert Ebert6, Jamey Szalay6, Robert Wilson9, Frederic Allegrini6,7, Phil Valek6,7, David McComas8, Fran Bagenal9 (1.University of Maryland, College Park, 2.NASA Goddard Space Flight Center, 3.Universities Space Research Association, 4.Space Research Corporation, 5.University of Iowa, 6.Southwest Research Institute, 7.University of Texas at San Antonio, 8.Princeton University, 9.University of Colorado, Boulder)

Keywords:juno, jupiter , magnetosphere

Using recent observations obtained by particles and fields instrumentation on the Juno spacecraft, we present the properties of Jupiter’s dawnside magnetopause in unprecedented detail. Through magnetic reconnection and viscous mixing (e.g., the Kelvin-Helmholtz instability) processes, Jupiter’s dawnside magnetopause provides a pathway for solar wind plasmas to enter the Jovian magnetosphere. On 14 July 2016, we identify an extended magnetopause boundary layer (MPBL) indicative of significant mass transport across the magnetopause. For this event, minimum variance analysis revealed an open magnetopause with a sunward-tilted boundary normal, indicative of significant magnetospheric compression. Furthermore, we identify ~2 h increases in the total magnetospheric pressure adjacent to two magnetopause crossings. These structures are of an order of magnitude longer duration than typical magnetospheric transits (e.g., plasmoids, reconnection fronts) and may provide evidence of focused energy transport into the magnetosphere via magnetohydrodynamic waves.