Clusters of cyclones encircling Jupiter’s poles


The familiar axisymmetric zones and belts that characterize Jupiter’s weather system at lower latitudes give way to pervasive cyclonic activity at higher latitudes1. Two-dimensional turbulence in combination with the Coriolis β-effect (that is, the large meridionally varying Coriolis force on the giant planets of the Solar System) produces alternating zonal flows2. The zonal flows weaken with rising latitude so that a transition between equatorial jets and polar turbulence on Jupiter can occur3,4. Simulations with shallow-water models of giant planets support this transition by producing both alternating flows near the equator and circumpolar cyclones near the poles5,6,7,8,9. Jovian polar regions are not visible from Earth owing to Jupiter’s low axial tilt, and were poorly characterized by previous missions because the trajectories of these missions did not venture far from Jupiter’s equatorial plane. Here we report that visible and infrared images obtained from above each pole by the Juno spacecraft during its first five orbits reveal persistent polygonal patterns of large cyclones. In the north, eight circumpolar cyclones are observed about a single polar cyclone; in the south, one polar cyclone is encircled by five circumpolar cyclones. Cyclonic circulation is established via time-lapse imagery obtained over intervals ranging from 20 minutes to 4 hours. Although migration of cyclones towards the pole might be expected as a consequence of the Coriolis β-effect, by which cyclonic vortices naturally drift towards the rotational pole, the configuration of the cyclones is without precedent on other planets (including Saturn’s polar hexagonal features). The manner in which the cyclones persist without merging and the process by which they evolve to their current configuration are unknown.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Figure 1: The poles of Jupiter as they appear at visible and infrared wavelengths.
Figure 2: The poles observed by JunoCam during the first four passes at Jupiter.
Figure 3: High-resolution view of the polar vortices.


  1. 1

    Porco, C. C. et al. Cassini imaging of Jupiter’s atmosphere, satellites, and rings. Science 299, 1541–1547 (2003)

    CAS  ADS  Article  Google Scholar 

  2. 2

    Rhines, P. B. Waves and turbulence on a beta-plane. J. Fluid Mech. 69, 417–443 (1975)

    ADS  Article  Google Scholar 

  3. 3

    Theiss, J. Equatorward energy cascade, critical latitude, and the predominance of cyclonic vortices in geostrophic turbulence. J. Phys. Oceanogr. 34, 1663–1678 (2004)

    ADS  Article  Google Scholar 

  4. 4

    Sayanagi, K. M., Showman, A. P. & Dowling, T. E. The emergence of multiple robust zonal jets from freely evolving, three-dimensional stratified geostrophic turbulence with applications to Jupiter. J. Atmos. Sci. 65, 3947–3962 (2008)

    ADS  Article  Google Scholar 

  5. 5

    Cho, J. Y. K. & Polvani, L. M. The emergence of jets and vortices in freely evolving, shallow-water turbulence on a sphere. Phys. Fluids 8, 1531–1552 (1996)

    CAS  ADS  Article  Google Scholar 

  6. 6

    Iacono, R., Struglia, M. V. & Ronchi, C. Spontaneous formation of equatorial jets in freely decaying shallow water turbulence. Phys. Fluids 11, 1272–1274 (1999)

    CAS  ADS  Article  Google Scholar 

  7. 7

    Showman, A. P. Numerical simulations of forced shallow-water turbulence: effects of moist convection on the large-scale circulation of Jupiter and Saturn. J. Atmos. Sci. 64, 3132–3157 (2007)

    ADS  Article  Google Scholar 

  8. 8

    Scott, R. K. & Polvani, L. M. Forced-dissipative shallow-water turbulence on the sphere and the atmospheric circulation of the giant planets. J. Atmos. Sci. 64, 3158–3176 (2007)

    ADS  Article  Google Scholar 

  9. 9

    O’Neill, M. E., Emanuel, K. A. & Flierl, G. R. Polar vortex formation in giant-planet atmospheres due to most convection. Nat. Geosci. 8, 523–526 (2015)

    ADS  Article  Google Scholar 

  10. 10

    Bolton, S. J. et al. Jupiter’s interior and deep atmosphere: the initial pole-to-pole passes with the Juno spacecraft. Science 356, 821–825 (2017)

    CAS  ADS  Article  Google Scholar 

  11. 11

    Connerney, J. E. P. et al. Jupiter’s magnetosphere and aurorae observed by the Juno spacecraft during its first polar orbits. Science 356, 826–832 (2017)

    CAS  ADS  Article  Google Scholar 

  12. 12

    Grassi, D. et al. Preliminary results on the composition of Jupiter’s troposphere in hot spot regions from the JIRAM/Juno instrument. Geophys. Res. Lett. 44, 4615–4624 (2017)

    ADS  Article  Google Scholar 

  13. 13

    Sindoni, G. et al. Characterization of the white ovals on Jupiter’s southern hemisphere using the first data by the Juno/JIRAM instrument. Geophys. Res. Lett. 44, 4660–4668 (2017)

    ADS  Article  Google Scholar 

  14. 14

    Orton, G. S. et al. The first close-up images of Jupiter’s polar regions: results from the Juno mission JunoCam instrument. Geophys. Res. Lett. 44, 4599–4606 (2017)

    ADS  Article  Google Scholar 

  15. 15

    Orton, G. S. et al. Multiple-wavelength sensing of Jupiter during the Juno mission's first perijove passage. Geophys. Res. Lett. 44, 4607–4614 (2017)

    ADS  Article  Google Scholar 

  16. 16

    Adriani, A. et al. JIRAM, the Jovian Infrared Auroral Mapper. Space Sci. Rev. 213, 393–446 (2017)

    ADS  Article  Google Scholar 

  17. 17

    Adriani, A. et al. Juno’s Earth flyby: the Jovian Infrared Auroral Mapper preliminary results. Astrophys. Space Sci. 361, 272 (2016)

    ADS  Article  Google Scholar 

  18. 18

    Hansen, C. J. et al. JunoCam: Juno’s Outreach Camera. Space Sci. Rev. 213, 475–506 (2017)

    ADS  Article  Google Scholar 

  19. 19

    Theiss, J. A generalized Rhines effect and storms on Jupiter. Geophys. Res. Lett. 33, L08809 (2006)

    ADS  Article  Google Scholar 

  20. 20

    LeBeau, R. P. Jr & Dowling, T. E. EPIC simulations of time-dependent, three-dimensional vortices with application to Neptune’s great dark spot. Icarus 132, 239–265 (1998)

    ADS  Article  Google Scholar 

  21. 21

    Youssef, A. & Marcus, P. S. The dynamics of jovian white ovals from formation to merger. Icarus 162, 74–93 (2003)

    ADS  Article  Google Scholar 

  22. 22

    Fine, K. S., Cass, A. C., Flynn, W. G. & Driscoll, C. F. Relaxation of 2D turbulence to vortex crystals. Phys. Res. Lett. 75, 3277–3280 (1995)

    CAS  ADS  Article  Google Scholar 

  23. 23

    Schecter, D. A., Dubin, D. H. E., Fine, K. S. & Driscoll, C. F. Vortex crystals from 2D Euler flow: experiment and simulation. Phys. Fluids 11, 905–914 (1999)

    CAS  ADS  Article  Google Scholar 

  24. 24

    Acton, C. H. Ancillary data services of NASA’s navigation and ancillary information facility. Planet. Space Sci. 44, 65–70 (1996)

    ADS  Article  Google Scholar 

  25. 25

    Hahn, Th . (ed.) International Tables for Crystallography Vol. A, 5th edn, 768, 786 (Springer, 2005)

  26. 26

    Aref, H. et al. Vortex crystals. Adv. Appl. Mech. 39, 1–79 (2003)

    Article  Google Scholar 

  27. 27

    Gorter, C. J. The two fluid model of helium II. Nuovo Cimento 6 (Suppl. 2), 245–250 (1949); see discussion by L. Onsager, 249–250

  28. 28

    Feynman, R. P. in Progress in Low Temperature Physics Vol. 1 (ed. Gorter, C. J.) Ch. II, 17–53 (Elsevier, 1955)

  29. 29

    Landau, L. D. The theory of superfluidity of helium II. Zh. Eksp. Teor. Fiz. 11, 592 (1941)

    CAS  ADS  MATH  Google Scholar 

  30. 30

    Yarmchuk, E. J., Gordon, M. J. V. & Packard, R. E. Observation of stationary vortex arrays in rotating superfluid helium. Phys. Rev. Lett. 43, 214–217 (1979)

    CAS  ADS  Article  Google Scholar 

Download references


The JIRAM project is founded by the Italian Space Agency (ASI). In particular this work has been developed under the ASI-INAF agreement number 2016-23-H.0. The JunoCam instrument and its operations are funded by the National Aeronautics and Space Administration. A portion of this work was supported by NASA funds to the Jet Propulsion Laboratory, to the California Institute of Technology, and to the Southwest Research Institute. A.P.I. was supported by NASA funds to the Juno project and by NSF grant number 1411952.

Author information




A.A. and C.H. are the Juno mission instrument leads for the JIRAM and JunoCam instruments, respectively, and they planned and implemented the observations discussed in this paper. S.J.B. and J.E.P.C. are respectively the principal and the deputy responsible for the Juno mission. A.A., A. Mura, G.O., J.R., A.I. and F.T.-V. were responsible for writing substantial parts of the paper. M.E.O’N. helped with the interpretation of the cyclonic structure. A. Mura, F.A., M.L.M. and D.G. were responsible for reduction and measurement of the JIRAM data and their rendering into graphical formats. G.E., T.M., G.O. and J.R. were responsible for the same tasks for JunoCam data. F.T.-V. and F.F. were responsible for the geometric calibration of the JIRAM data. G.F., G.S., B.M.D. and S.S. were responsible for the JIRAM data radiance calibrations. A.C., R.N. and R.S. were responsible for the JIRAM ground segment. S.K.A., J.I.L., A. Migliorini, D.T, G.P. and D.T. supervised the work. C.P., A.O. and M.A. were responsible for the JIRAM project from the Italian Space Agency side.

Corresponding author

Correspondence to A. Adriani.

Ethics declarations

Competing interests

The authors declare no competing financial interests.

Additional information

Publisher's note: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Extended data figures and tables

Extended Data Figure 1 Comparison of the polar cyclonic structures between PJ4 and PJ5.

Here is the comparison between JIRAM 5-μm data acquired during PJ4 and PJ5. The letters identify possible recurrent structures and arrows show the suggested displacements that occurred in the 53-day interval between these two perijoves. The radiance scale is the same as in Fig. 1. When the region surrounding the north pole is not sunlit, there are no JunoCam observations of the NPC. Although the north pole was detected by JIRAM on PJ4, we were unable to determine whether or not it maintains a stable position over the geographic north pole because of insufficient coverage of the NPC during PJ5. However, the cyclonic structures A, B and C move northeast, migrating from the lower latitudes. The G and H internal structures, located between the NPC and the cyclones, are anticyclones and move westward in that narrow corridor between 85.5° N and 87° N to their new location observed during PJ5 between vortex D and the NPC. In contrast, JIRAM was able to observe the SPC in both PJ4 and PJ5. In fact, along with the cyclones G and H shown, the SPC moves northward, increasing its distance with respect to the geographic south pole by 1.5° between PJ4 and PJ5. On the other hand, JunoCam was able to observe the SPC at all perijoves, and found that it was always displaced from the south pole in approximately the same direction (towards a System III longitude of about 219° ± 21°), with its central latitude varying from 88.0° S at PJ1 up to 89.0° S at PJ4, and down to 88.4° S at PJ5. It remains to be seen whether this is a cyclic oscillation. The five cyclones remain at almost constant radial distances from the centre of the SPC (and thus not from the geographic south pole), so the whole pentagon drifts in latitude. Anticyclone A appears to move as much as about 1° south and about 24° east. It is forced and surrounded by the two cyclonic structures that consolidate themselves between PJ4 and PJ5 from the origins L, J, C and K. Finally, the anticyclone D disappears while F is expelled from its position and possibly moves to new position E.

Extended Data Figure 2 Annotated version of the JunoCam images of the poles.

The unannotated version is shown in Fig. 2. The composite components from each perijove pass that were used to create the figure are noted. Each corresponds to the polar image taken at a time that minimized the emission angle over most of the pole, as detailed in Extended Data Table 2. The PJ4 component is identical to its contribution in Fig. 1, with contributions from the other perijove passes, separated by approximately 90° in longitude, as noted. The northern cyclones forming the inner square (actually a rhombus) of the ditetragonal pattern are labelled by odd numbers and those forming the outer square by even numbers. The southern cyclones forming a quasi-pentagonal shape are numbered sequentially, with the largest spacing between cyclones labelled 1 and 5, indicated by the ‘gap’ label. Despite the time differences of 53 to 106 terrestrial days between JIRAM images acquired on PJ4, shown broadly in Fig. 1b and d, and JunoCam images in PJ1, PJ3 and PJ5, the positions of the cyclones are remarkably consistent in System III longitude.

Extended Data Table 1 JIRAM start time, stop time and number of observations for the different datasets used for this study
Extended Data Table 2 Details of the JunoCam observations

Supplementary information

Supplementary Information

This zipped file contains 9 videos for the North Pole (8 CPC, plus the NPC); each video is made of 11 images. It also contains 6 videos for the South Pole (5 CPC, plus the SPC); each video is made of 6 images. References are to Figure 1. 0°W in System III is positioned on the right centre of the images. Both Poles are seen from above, namely, progressing counter clockwise you move towards east in the North and towards west in the South. For the North Pole videos, north0.avi.mp4 is the North Polar Cyclone, north1.avi.mp4 is the cyclone at 0°W and for the other videos north[X].avi.mp4, the numbering [X=2 to 8] proceeds counter clockwise. For the South Pole videos, south0.avi.mp4 is the South Polar Cyclone, south1.avi.mp4 is the cyclone at 150°W and for the other videos south [X].avi.mp4, the numbering [X=2 to 5] proceeds counterclockwise. (ZIP 11167 kb)

PowerPoint slides

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Adriani, A., Mura, A., Orton, G. et al. Clusters of cyclones encircling Jupiter’s poles. Nature 555, 216–219 (2018).

Download citation

Further reading


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.


Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing