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

## TL;DR

This paper presents a novel method combining Juno's gravity and magnetic measurements to better constrain Jupiter's internal flow structure, revealing distinct flow influences at different depths.

## Contribution

It introduces a combined approach using mean-field electrodynamics and geostrophic balance to jointly analyze gravity and magnetic data for Jupiter's interior.

## Key findings

- Flow influences gravity primarily in upper regions
- Flow influences magnetic field mainly in lower regions
- Unified flow model consistent with both 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.