The octagon of northern circumpolar cyclones

2020-02-05 18:51 UT
Credit : NASA / JPL / SwRI / MSSS / Gerald Eichstädt / John Rogers © cc by
Submitted By : Philosophia-47

This is a composite north polar projection map from PJ20 to PJ24 to show the whole octagon of circumpolar cyclones (CPCs). The octagon is deformed at the top as one cyclone (CPC-7) has apparently been pushed away from the pole by the growth of an anticyclonic white oval just poleward of it. Conversely the sector imaged at PJ24 is quite regular and has changed little in the past 3 years. As the sunlight is gradually creeping towards the north pole, we can now see part of the centrl North Polar Cyclone. JunoCam can only see a limited sector of the north polar region at each perijove, so this is a composite of our maps from each perijove, each one being a composite of single-image maps produced by Gerald Eichstädt, and posted in our reports on each perijove in the Think Tank section and on the BAA Jupiter Section web site. --John Rogers.