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Five Years of Observations of the Circumpolar Cyclones of Jupiter

Mura, A. and Scarica, P. and Grassi, D. and Adriani, A. and Bracco, A. and Piccioni, G. and Sindoni, G. and Moriconi, M. L. and Plainaki, C. and Ingersoll, A. and Altieri, F. and Cicchetti, A. and Dinelli, B. M. and Filacchione, G. and Migliorini, A. and Noschese, R. and Sordini, R. and Stefani, S. and Tosi, F. and Turrini, D. (2022) Five Years of Observations of the Circumpolar Cyclones of Jupiter. Journal of Geophysical Research. Planets, 127 (9). Art. No. e2022JE007241. ISSN 2169-9097. doi:10.1029/2022je007241.

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The regular polygons of circumpolar cyclones, discovered by Juno in 2017, are one of the most puzzling features of Jupiter. Here we show new recent global pictures of the North polar cyclones' structure. These are the first simultaneous images of the whole structure since 2017, and we find that it remained almost unperturbed, just like the South one. The observation of these long-lasting structures poses questions regarding the formation mechanism of cyclones, and on their vertical structure. Data by Juno/JIRAM infrared camera collected over the last 5 years show that cyclones migrate around what may seem like equilibrium positions, with timescales of a few months but, aside from that, the cyclones systems are very stable. Our analysis of the observations shows that the motion of cyclones around their equilibrium position is uncorrelated with their position if a barotropic approximation (β-drift) is assumed. Thus, a different dynamical explanation than the barotropic β-drift is needed to explain the stability of the observed features. Each cyclone has a peculiar morphology, which differs from the others and is stable over the observed lapse of time in most cases.

Item Type:Article
Related URLs:
URLURL TypeDescription
Mura, A.0000-0002-4552-4292
Scarica, P.0000-0001-8836-0825
Grassi, D.0000-0003-1653-3066
Adriani, A.0000-0003-4998-8008
Bracco, A.0000-0002-1619-6103
Piccioni, G.0000-0002-7893-6808
Sindoni, G.0000-0002-3348-7930
Moriconi, M. L.0000-0003-2609-2620
Plainaki, C.0000-0003-1483-5052
Ingersoll, A.0000-0002-2035-9198
Altieri, F.0000-0002-6338-8300
Cicchetti, A.0000-0002-9588-6531
Dinelli, B. M.0000-0002-1218-0008
Filacchione, G.0000-0001-9567-0055
Migliorini, A.0000-0001-7386-9215
Noschese, R.0000-0003-0502-0337
Stefani, S.0000-0001-5762-4947
Tosi, F.0000-0003-4002-2434
Turrini, D.0000-0002-1923-7740
Additional Information:This work was supported by the Italian Space Agency (ASI) through ASI-INAF agreement no. 2016-23-H.0 and its addendum no. 2016-23-H.1-2018 and no. 2016-23-H.2-2021. Open Access Funding provided by Istituto Nazionale di Astrofisica within the CRUI-CARE Agreement.
Funding AgencyGrant Number
Agenzia Spaziale Italiana (ASI)2016-23-H.0
Agenzia Spaziale Italiana (ASI)2016-23-H.1-2018
Agenzia Spaziale Italiana (ASI)2016-23-H.2-2021
Istituto Nazionale di Astrofisica (INAF)UNSPECIFIED
Issue or Number:9
Record Number:CaltechAUTHORS:20221010-454096500.8
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:117294
Deposited By: Research Services Depository
Deposited On:14 Oct 2022 21:05
Last Modified:14 Oct 2022 21:05

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