Computer simulations of Jupiter's deep internal dynamics help interpret what Juno sees

Area of Science:

• Planetary Science
• Geophysics
• Plasma Physics

Background:

• Jupiter's deep interior dynamics and magnetic field generation remain incompletely understood.
• The depth of Jupiter's zonal winds and the nature of its core are long-standing questions in planetary science.

Purpose of the Study:

• To simulate Jupiter's convective dynamo and investigate the influence of deep interior dynamics on magnetic field generation.
• To explore whether observable surface features could indicate the depth of zonal winds and the size of the rocky core.

Main Methods:

• Utilized advanced computer simulations of thermal convection and magnetic field generation in Jupiter's deep interior.
• Analyzed results from three distinct simulations to assess the impact of deep interior dynamics.
• Investigated the behavior of axisymmetric inertial waves and their relationship to core size.

Main Results:

• Convection and magnetic field generation appear primarily confined to the upper interior, but deep interior dynamics are crucial.
• Simulations suggest that Juno's detection of latitudinally banded patterns in near-surface fields would indicate deep zonal winds.
• A deep axisymmetric inertial wave was sustained, with surface properties dependent on the simulated core size.

Conclusions:

• Deep interior dynamics play a significant role in Jupiter's magnetic field, even if primary activity is in the upper layers.
• Observational evidence from Juno could confirm the deep extent of Jupiter's zonal winds.
• Surface wave detection could provide insights into the existence and size of Jupiter's rocky core.