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Constraints on the Latitudinal Profile of Jupiter's Deep Jets

Galanti, Eli and Kaspi, Yohai and Duer, Keren and Fletcher, Leigh and Ingersoll, Andrew P. and Li, Cheng and Orton, Glenn S. and Guillot, Tristan and Levin, Steven M. and Bolton, Scott J. (2021) Constraints on the Latitudinal Profile of Jupiter's Deep Jets. Geophysical Research Letters, 48 (9). Art. No. e2021GL092912. ISSN 0094-8276. doi:10.1029/2021GL092912.

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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. Here, we examine to what extent, and at which latitudes, must the flows at depth resemble those at the cloud level to match the gravity signal. We show, using both the symmetric and asymmetric parts of the measured gravity field, that the observed cloud‐level wind profile between 25°S and 25°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 decay inward in the radial direction.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Galanti, Eli0000-0002-5440-8779
Kaspi, Yohai0000-0003-4089-0020
Duer, Keren0000-0003-4428-2700
Fletcher, Leigh0000-0001-5834-9588
Ingersoll, Andrew P.0000-0002-2035-9198
Li, Cheng0000-0002-8280-3119
Orton, Glenn S.0000-0001-7871-2823
Guillot, Tristan0000-0002-7188-8428
Levin, Steven M.0000-0003-2242-5459
Bolton, Scott J.0000-0002-9115-0789
Additional Information:© 2021 American Geophysical Union. Issue Online: 08 May 2021; Version of Record online: 08 May 2021; Accepted manuscript online: 20 April 2021; Manuscript accepted: 09 April 2021; Manuscript revised: 06 April 2021; Manuscript received: 13 February 2021. E. Galanti, Y. Kaspi and K. Duer are supported by the Israeli Space Agency and the Helen Kimmel Center for Planetary Science at the Weizmann Institute of Science. L. Fletcher is a Juno Participating Scientist supported by a Royal Society Research Fellowship and European Research Council Consolidator Grant (under the European Union's Horizon 2020 research and innovation programme, grant agreement No 723890) at the University of Leicester. Some of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). All authors have been supported by the Juno project. Data Availability Statement: Data are available through Iess et al. (2018), Guillot et al. (2018), and Galanti & Kaspi (2021).
Funding AgencyGrant Number
Israeli Space AgencyUNSPECIFIED
Weizmann Institute of ScienceUNSPECIFIED
European Research Council (ERC)723890
Subject Keywords:gravity; Juno; Jupiter; MWR; winds
Issue or Number:9
Record Number:CaltechAUTHORS:20210222-124036781
Persistent URL:
Official Citation:Galanti, E., Kaspi, Y., Duer, K., Fletcher, L., Ingersoll, A. P., Li, C., et al. (2021). Constraints on the latitudinal profile of Jupiter's deep jets. Geophysical Research Letters, 48, e2021GL092912.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108145
Deposited By: Tony Diaz
Deposited On:22 Feb 2021 20:52
Last Modified:16 Nov 2021 08:05

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