Other
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.1405t&link_type=abstract
American Astronomical Society, DPS meeting #41, #14.05
Other
Scientific paper
The methane absorption as well as other optical properties of Saturn's visible atmosphere and clouds shows clearly expressed North-South asymmetry even at the time of the planet equinox when we saw the "edge-on” rings and equator orientation. During this event in 1995 we have found that the CH4 absorption bands are significantly less at the temperate latitudes of S-hemisphere than observable in N-hemisphere.. During next years till 2008 the latitudinal absorption distribution was changing according the changes of the equator tilt and for Southern temperate latitudes there was noted a regular annual increase of the methane bands intensity. .. Last observations were accomplished from December 2008 up to March 2009 .by consequent zonal scanning of Saturn's disk . Each series consisted of 80-90 CCD-spectra. The spectra of central meridian of Saturn were studied also. The view of the latitudinal variations of the methane absorption is not simply reciprocal to observed in 1995 as it may be waiting. The CH4 band 725 nm shows near symmetric distribution in both hemispheres . Weaker absorption bands 619 nm and 670 nm do not show that symmetry and they are stronger in the Northern hemisphere as in 1995. . The growth of the ammonia absorption in the NH3 643 nm band was detected also in Northern hemisphere. Preliminary the structural atmospheric changes, which are imaging in the methane absorption variations, may be connected with significantly different insolation regimes during the years preceding 1995 and 2009 observational seasons.
Karimov A. M.
Kharitonova G. A.
Kirienko G. A.
Tejfel Victor G.
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