Physics – Fluid Dynamics
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..dfd.ba001m&link_type=abstract
American Physical Society, Division of Fluid Dymanics 55th Annual Meeting, abstract #BA.001
Physics
Fluid Dynamics
Scientific paper
We predict that the day--night and seasonally--averaged temperature of the Jovian atmosphere at the height of the visible clouds will change by 10^rc or more. We further predict that the change will be preceded by a decrease in the number of large jovian vortices, that following the temperature change there will be violent instabilities along the planet's eastward-going jet streams and that the instabilities will lead to a re-population of the jovian vortices in the atmosphere. We argue that these events are part of a ˜100--year cycle and that the temperature changes will start to occur within the next 7 years. Most of these changes will be easy to detect from ground-based telescopes. The Voyager satellite images from 1978--79 showed a Jovian atmosphere atmosphere that was characterized by large coherent vortices superposed on jet streams, waves and turbulence. There is qualitative evidence from ground-based telescopes that the jovian atmosphere was similar to its 1978-79 state for most of the twentieth century. However during the last 10 years, several of the vortices that were classified as ``long--lived'' have vanished. Using basic ideas of fluid dynamics we explain why, and show that the consequences of these events combined with these ideas lead to a 100-year jovian climate cycle.
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