Other
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p11c1286c&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #P11C-1286
Other
5704 Atmospheres (0343, 1060), 5739 Meteorology (3346), 6220 Jupiter
Scientific paper
We investigate the dynamics of Jupiter's Oval BA (Little Red Spot), a new anticyclonic vortex in Jupiter's southern hemisphere that is the result of successive mergers of the three White Oval anticyclones over a period of three years in the late 20th century. Oval BA has gained attention since late 2005 because it has attained a reddish hue, mimicking the Great Red Spot. We have processed high-resolution observations of Oval BA from Cassini and New Horizons flybys. We apply our automated cloud feature tracking technique to create a detailed wind flow field map of the vortex before and after the color change. We also use the flow fields to create maps of other dynamical quantities, such as vorticity. We discuss the implications of the evolving dynamics of Oval BA on the mechanisms proposed for the vortex's new appearance. We have also used the images of Oval BA to assess the dynamics of cyclonic regions surrounding the vortex. We note the possible appearance of active convection and thunderstorms in these regions, and examine the connection between the typical flow found in cyclones and their visible appearance. We discuss the implications of our measurements of these often overlooked and active regions of Jupiter's atmosphere and their possible connection with Oval BA.
Choi David S.
Showman Adam P.
Vasavada Ashwin
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