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Oscillations and Stability of the Jupiter Polar Cyclones

Mura, A. and Adriani, A. and Bracco, A. and Moriconi, M. L. and Grassi, D. and Plainaki, C. and Ingersoll, A. and Bolton, S. and Sordini, R. and Altieri, F. and Ciarravano, A. and Cicchetti, A. and Dinelli, B. M. and Filacchione, G. and Migliorini, A. and Noschese, R. and Piccioni, G. and Scarica, P. and Sindoni, G. and Stefani, S. and Tosi, F. and Turrini, D. (2021) Oscillations and Stability of the Jupiter Polar Cyclones. Geophysical Research Letters, 48 (14). Art. No. e2021GL094235. ISSN 0094-8276. doi:10.1029/2021gl094235.

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Juno discovered the circumpolar cyclones polygons on Jupiter in 2017. Fundamental questions regarding Jovian cyclogenesis concern the formation mechanism and whether these cyclones are deep or shallow. Recent data by Juno/JIRAM infrared camera show that any change is an extremely unlikely event on an annual scale. Only once, in 2019, a sixth cyclone joined the pentagonal structure in the South, but it disappeared after 2 months without merging with the pre-existing cyclones; disappearance or creation of stable cyclones has never been observed. Additionally, the rotation speeds of the north and south polygons as a whole are not compatible with the shallow hypothesis; both structures drift at a much smaller rate than the typical scale velocities on Jupiter surface, and differ at the two poles. Cyclones oscillate around what may seem like equilibrium positions, and these oscillations tend to propagate from one cyclone to another. These oscillations have almost equal timescales, and here we investigate the possible implications of such similarity.

Item Type:Article
Related URLs:
URLURL TypeDescription
http://pds.nasa.govRelated ItemNASA Planetary Data System ItemJIRAM data ItemExperiment Data Record; raw data ItemExperiment Data Record; raw data ItemExperiment Data Record; raw data ItemReduced Data Record; calibrated data ItemReduced Data Record; calibrated data ItemReduced Data Record; calibrated data
Mura, A.0000-0002-4552-4292
Adriani, A.0000-0003-4998-8008
Bracco, A.0000-0002-1619-6103
Moriconi, M. L.0000-0003-2609-2620
Grassi, D.0000-0003-1653-3066
Plainaki, C.0000-0003-1483-5052
Ingersoll, A.0000-0002-2035-9198
Bolton, S.0000-0002-9115-0789
Altieri, F.0000-0002-6338-8300
Ciarravano, A.0000-0001-8698-4888
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
Piccioni, G.0000-0002-7893-6808
Sindoni, G.0000-0002-3348-7930
Stefani, S.0000-0001-5762-4947
Tosi, F.0000-0003-4002-2434
Turrini, D.0000-0002-1923-7740
Additional Information:© 2021. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Issue Online: 23 July 2021; Version of Record online: 23 July 2021; Accepted manuscript online: 03 July 2021; Manuscript accepted: 25 June 2021; Manuscript revised: 21 June 2021; Manuscript received: 10 May 2021. This work was supported by the Italian Space Agency through ASI-INAF contract I/010/10/0 and 2014-050-R.0. The JIRAM instrument was developed by Leonardo at the Officine Galileo - Campi Bisenzio site. Open Access Funding provided by Istituto nazionale di astrofisica within the CRUI-CARE Agreement. Data Availability Statement: JIRAM data used in this study is publicly available on the Planetary Data System ( and can be downloaded from The individual datasets are available at PDS/data/jnojir_xxxx, where xxxx is 1,001, 1,002, or 1,003 for EDR (Experiment Data Record; raw data) and 2001, 2002, or 2003 for RDR (Reduced Data Record; calibrated data) volumes.
Funding AgencyGrant Number
Agenzia Spaziale Italiana (ASI)I/010/10/0
Agenzia Spaziale Italiana (ASI)2014-050-R.0
Issue or Number:14
Record Number:CaltechAUTHORS:20210714-172117080
Persistent URL:
Official Citation:Mura, A., Adriani, A., Bracco, A., Moriconi, M. L., Grassi, D., Plainaki, C., et al. (2021). Oscillations and stability of the Jupiter polar cyclones. Geophysical Research Letters, 48, e2021GL094235.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109816
Deposited By: Tony Diaz
Deposited On:14 Jul 2021 18:07
Last Modified:26 Jul 2021 22:42

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