Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.1906t&link_type=abstract
American Astronomical Society, DPS meeting #39, #19.06; Bulletin of the American Astronomical Society, Vol. 39, p.445
Astronomy and Astrophysics
Astronomy
Scientific paper
Prior analysis of Jupiter's zonal wind field offered slight evidence of periodicity on short time scales, though time coverage was marginal (Simon-Miller et al. 2007 Icarus 186, 192-203). Though the winds are measured through tracking of tropospheric clouds, it was hoped that some relation could be found between stratospheric temperature oscillations (the Quasi-Quadrennial Oscillation) and tropospheric winds. However, complicating the analysis was the fact that the pressure levels of the tracked cloud features are unknown, and are spatially and temporally variable. Thermal wind analysis for a few of the dates showed cloud level variations could easily account for most of the wind speed variability, except at 7 deg. S latitude. New images, acquired in 2006 and 2007, have allowed the extension of the zonal wind time base, improving the periodogram analysis. We will present results based on our newest zonal wind and temperature profiles.
Fisher Benji
Fletcher Lauren
Joels J.
Orton Glenn S.
Parrish Paul
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