Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.1103s&link_type=abstract
American Astronomical Society, DPS meeting #42, #11.03; Bulletin of the American Astronomical Society, Vol. 42, p.1017
Astronomy and Astrophysics
Astronomy
Scientific paper
The 2005-2006 reddening of a major anticyclonic storm, known as Oval BA, in Jupiter's turbulent atmosphere may well be a paradigm for the formation of red-colored vortices on the giant planets, including Jupiters Great Red Spot. Mid-infrared observations can be effectively used to determine physical and chemical properties of the atmosphere, and we present the results of mid-infrared thermal imaging observations, collected from NASAs Infrared Telescope Facility (IRTF) in Hawaii, ESOs Very Large Telescope (VLT) in Chile and the NAOJ Subaru Telescope in Hawaii between spring of 2005 and summer of 2006. These address the role of atmospheric tracers, including cloud opacity, the ammonia gas content, and the variation of the fraction of para- to ortho-hydrogen from local thermal equilibrium in assessing the rate of upwelling. These properties were retrieved with the Oxford-developed code, Nemesis, with the purpose of providing constraints on dynamical models in an effort to identify the mechanism for the color change. The most obvious change is that the temperature gradient from the inner to the outer part of Oval BA increased over the time of the color change, indicating a strengthening of the intensity of the vortex.
Fletcher Lauren
Orton Glenn
Shannon Matthew J.
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