Investigating Barotropic Zonal Flow in Jupiter's Deep Atmosphere Using Juno Gravitational Data

The high-precision Juno gravitational measurements allow us to infer the structure of Jupiter's deep atmospheric zonal flow. Since this inference is nonunique, it important explore space possible solutions. In paper, we consider a model in which flow barotropic, or invariant along direction rotation axis, until truncated at depth by some dynamical process (e.g., Reynolds stress, Lorentz viscous force). We calculate density perturbation produced $z$-invariant part using thermal wind equation and compare associated odd harmonics ($J_{3}$, $J_{5}$, $J_{7}$, $J_{9}$) Juno-derived values. Most antisymmetric signal measured can be explained extending observed winds between $20.9^{\circ}\rm{S}-26.4^{\circ}\rm{N}$ depths $\sim 1000$ km. Because small-scale features mid/high latitude may not persist depth, region differ from surface winds. find that fully km barotropic flows involving $20.9^{\circ}\rm{S}-26.4^{\circ}$N few broad jets.