Constraining Jupiter's internal flows using Juno magnetic and gravity measurements

Abstract

Deciphering the flow below the cloud-level of Jupiter remains a critical milestone in understanding Jupiter's internal structure and dynamics. The expected high-precision Juno measurements of both the gravity field and the magnetic field might help to reach this goal. Here we propose a method that combines both fields to constrain the depth dependent flow field inside Jupiter. This method is based on a mean-field electrodynamic balance that relates the flow field to the anomalous magnetic field, and geostrophic balance that relates the flow field to the anomalous gravity field. We find that the flow field has two distinct regions of influence - an upper region in which the flow affects mostly the gravity field, and a lower region in which the flow affects mostly the magnetic field. An optimization procedure allows to reach a unified flow structure that is consistent with both the gravity and the magnetic fields.

References in corpus (7)

• Comparing Jupiter interior structure models to Juno gravity measurements and the role of a dilute core
• Constraints on Deep-seated Zonal Winds Inside Jupiter and Saturn
• Explaining Jupiter's magnetic field and equatorial jet dynamics
• Magnetoconvection and dynamo coefficients III: alpha-effect and magnetic pumping in the rapid rotation regime
• Power Spectral Analysis of Jupiter's Clouds and Kinetic Energy from Cassini
• A note on "Constraints on deep-seated zonal winds inside Jupiter and Saturn"
• Decoupling Jupiter's deep and atmospheric flows using the upcoming Juno gravity measurements and a dynamical inverse model

Cited by in corpus (2)

• Saturn's deep atmospheric flows revealed by the Cassini Grand Finale gravity measurements
• Analysis of Jupiter's deep jets combining Juno gravity and time varying magnetic field measurements