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

Galanti, E. and Cao, H. and Kaspi, Y. (2017) Constraining Jupiter's internal flows using Juno magnetic and gravity measurements. Geophysical Research Letters, 44 (16). pp. 8173-8181. ISSN 0094-8276. https://resolver.caltech.edu/CaltechAUTHORS:20171005-103917451

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1002/2017GL074903DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/2017GL074903/abstractPublisherArticle
ORCID:
AuthorORCID
Galanti, E.0000-0002-5440-8779
Cao, H.0000-0002-6917-8363
Kaspi, Y.0000-0003-4089-0020
Additional Information:© 2017 American Geophysical Union. Received 12 APR 2017; Accepted 30 JUL 2017; Accepted article online 3 AUG 2017; Published online 26 AUG 2017. This research has been supported by the Israeli Ministry of Science and the Minerva foundation with funding from the Federal German Ministry of Education and Research. E.G. and Y.K. also acknowledge support from the Helen Kimmel Center for Planetary Science at the Weizmann Institute of Science. Most of the numerical information is provided in the figures produced by solving the equations in the paper. Any additional data may be obtained from E.G. (e-mail: eli.galanti@weizmann.ac.il).
Funders:
Funding AgencyGrant Number
Ministry of Science (Israel)UNSPECIFIED
Minerva FoundationUNSPECIFIED
Bundesministerium für Bildung und Forschung (BMBF)UNSPECIFIED
Weizmann Institute of ScienceUNSPECIFIED
Subject Keywords:Jupiter; flow; gravity; magnetic; optimization; Juno
Issue or Number:16
Record Number:CaltechAUTHORS:20171005-103917451
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20171005-103917451
Official Citation:Galanti, E., H. Cao, and Y. Kaspi (2017), Constraining Jupiter's internal flows using Juno magnetic and gravity measurements, Geophys. Res. Lett., 44, 8173–8181, doi:10.1002/2017GL074903
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82114
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:05 Oct 2017 21:59
Last Modified:03 Oct 2019 18:50

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