Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.1138t&link_type=abstract
American Astronomical Society, DPS meeting #38, #11.38; Bulletin of the American Astronomical Society, Vol. 38, p.1294
Other
Scientific paper
Since 1995 when the equator and rings of Saturn were oriented "edge-on" towards the Sun and Earth the most intense insolation is happen to Southern hemisphere of the planet. In 1995 the strong N-S asymmetry of the optical characteristics of Saturn's atmosphere and clouds was expressed very clearly. There were significant differences in the latitudinal distribution of the methane absorption bands intensity as well as in the values of the limb darkening . The maximum of the methane absorption was related to the Northern hemisphere which was inclined towards the Sun during at least once 11 preceding years. However the limb darkening in the N-hemisphere was sharply decreased. It will be important to look on the similar situation at the next "edge-on" position for Saturn in 2009-2010 after predominating insolation of its Southern hemisphere. Our measurements of the CH4 absorption bands profiles in visible and near IR spectrum were realized during 1995-2006 by two ways. The first one used the CCD-spectra of the Saturn central meridian. The second was based on the number of scanning zonal spectrograms of Saturn`s disk . General latitudinal variations of the methane absorption in the Southern hemisphere of Saturn are keeping during last years . The maximum absorption is observed at latitudes about -15 -20 deg in contrast with equatorial belt where the absorption sharply decreased. Small depression of the methane absorption has a place between -40 -70 deg, but the absorption increases towards the South pole. The atlas of these data have been prepared and will be continued to get a full view of the changes in Saturn`s atmosphere during 15 years. It may be waiting that the latitudinal asymmetry of the methane absorption and other atmospheric characteristics on Saturn in 2009-2011 will be reciprocal to observed in 1995.
Kharitonova G. A.
Tejfel Victor G.
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