Constraints on the latitudinal profile of Jupiter's deep jets

Abstract

The observed zonal winds at Jupiter's cloud tops have been shown to be closely linked to the asymmetric part of the planet's measured gravity field. However, other measurements suggest that in some latitudinal regions the flow below the clouds might be somewhat different from the observed cloud-level winds. Here we show, using both the symmetric and asymmetric parts of the measured gravity field, that the observed cloud-level wind profile between 25${}^{\circ }$S and 25${}^{\circ }$N must extend unaltered to depths of thousands of kilometers. Poleward, the midlatitude deep jets also contribute to the gravity signal, but might differ somewhat from the cloud-level winds. We analyze the likelihood of this difference and give bounds to its strength. We also find that to match the gravity measurements, the winds must project inward in the direction parallel to Jupiter's spin axis, and that their decay inward should be in the radial direction.

References in corpus (8)

• Constraints on Deep-seated Zonal Winds Inside Jupiter and Saturn
• New models of Jupiter in the context of Juno and Galileo
• The water abundance in Jupiter's equatorial zone
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• Jupiter's Temperate Belt/Zone Contrasts Revealed at Depth by Juno Microwave Observations
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• Jupiter's Temperate Belt/Zone Contrasts Revealed at Depth by Juno Microwave Observations
• Super-adiabatic Temperature Gradient at Jupiter's Equatorial Zone and Implications for the Water Abundance
• Gas Giant Simulations of Eddy-Driven Jets Accompanied by Deep Meridional Circulation
• Investigating Barotropic Zonal Flow in Jupiter's Deep Atmosphere using Juno Gravitational Data
• The Shape of Jupiter and Saturn Based on Atmospheric Dynamics, Radio Occultations and Gravity Measurements
• Dynamical constraints on the vertical structure of Jupiter's polar cyclones
• Model of deep zonal flows in giant planets
• The deep atmosphere of Jupiter