The number and location of Jupiter’s circumpolar cyclones explained by vorticity dynamics

  title={The number and location of Jupiter’s circumpolar cyclones explained by vorticity dynamics},
  author={Nimrod Gavriel and Yohai Kaspi},
  journal={Nature Geoscience},
  pages={559 - 563}
The Juno mission observed that both poles of Jupiter have polar cyclones that are surrounded by a ring of circumpolar cyclones (CPCs). The north pole holds eight CPCs and the south pole possesses five, with both circumpolar rings positioned along latitude ~84° N/S. Here we explain the location, stability and number of the Jovian CPCs by establishing the primary forces that act on them, which develop because of vorticity gradients in the background of a cyclone. In the meridional direction, the… 
1 Citations

Figures from this paper

Moist convection drives an upscale energy transfer at Jovian high latitudes
Jupiter’s atmosphere is one of the most turbulent places in the solar system. Whereas observations of lightning and thunderstorms point to moist convection as a small-scale energy source for


Clusters of cyclones encircling Jupiter’s poles
It is reported 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.
Long-term tracking of circumpolar cyclones on Jupiter from polar observations with JunoCam
Abstract We use observations from the JunoCam instrument on the Juno spacecraft to map the polar regions of Jupiter between 2016 and 2018. These polar maps track the long-term evolution of the
Some Aspects of Vortex Structure Related to Tropical Cyclone Motion
Abstract Some effect of tropical cyclone structure on the vortex motion are examined in a nondivergent, barotropic numerical model with no basic current. As suggested earlier by DeMaria, the initial
A potential vorticity perspective on the motion of a mid‐latitude winter storm
[1] The motion of mid-latitude surface cyclones relative to the jet streams is of particular interest because of the commonly observed strong and rapid deepening they undergo when they cross the
Modeling the stability of polygonal patterns of vortices at the poles of Jupiter as revealed by the Juno spacecraft
This work model the vortices using the shallow water equations, which describe a single layer of fluid that moves horizontally and has a free surface that moves up and down in response to fluid convergence and divergence, and finds that the stability of the pattern depends mostly on shielding—an anticyclonic ring around each cyclone, but also on the depth.
Cyclonic circulation of Saturn’s atmosphere due to tilted convection
Saturn displays cyclonic vortices at its poles and the general atmospheric circulation at other latitudes is dominated by embedded zonal jets that display cyclonic circulation. The abundance of
Dynamical regimes of giant planet polar vortices
Abstract We present a numerical model that reveals a mechanism governing the polar atmospheric dynamics of Jupiter, Saturn, Uranus and Neptune. Exploration of the polar regions of the gas giants has
Weak Jets and Strong Cyclones: Shallow-Water Modeling of Giant Planet Polar Caps
AbstractGiant planet tropospheres lack a solid, frictional bottom boundary. The troposphere instead smoothly transitions to a denser fluid interior below. However, Saturn exhibits a hot, symmetric
Cassini ISS observation of Saturn’s north polar vortex and comparison to the south polar vortex
We present analyses of Saturn’s north pole using high-resolution images captured in late 2012 by the Cassini spacecraft’s Imaging Science Subsystem (ISS) camera. The images reveal the presence of an
First Estimate of Wind Fields in the Jupiter Polar Regions From JIRAM‐Juno Images
We present wind speeds at the ~ 1 bar level at both Jovian polar regions inferred from the 5-μm infrared images acquired by the Jupiter InfraRed Auroral Mapper (JIRAM) instrument on the National