Multi-wavelength Observations of Jupiter’s Northern Circumpolar Cyclones

Juno arrived at Jupiter in 2016 and was inserted into a polar orbit with its closest approach (“perijove”) near Jupiter’s equator.  One of Juno’s first major discoveries was the existence of circumpolar cyclones covering both of Jupiter’s poles. Over the course of Juno’s prime and extended missions, the line of apsides of the orbit has experienced a constant northward migration due to Jupiter’s asymmetric gravity field. One result of this migration is the lowering the spacecraft’s altitude over Jupiter’s north pole.  Recently, the altitude over the north pole has reduced sufficiently to allow Juno’s microwave radiometer (MWR) to resolve Jupiter’s circumpolar cyclones.  The observations provide new insights into how the circumpolar cyclones evolve with depth.  We will present results from multi-wavelength observations of Jupiter’s polar cyclones including visible light images (JunoCam), the infrared images (JIRAM) and microwave images (MWR).  The combined data set reveals information on how the circumpolar cyclones compare and evolve with depth.