Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2009-12-10
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
pages 9; figures 4
Scientific paper
A time series of the Martian south ice polar cap mean diameter for the period July-December 1924 is investigated. The data are based on the high quality pictures, which are obtained by visual observations of 60 cm telescope in Hamburg Observatory during the great opposition of Mars in AD 1924. After removing of the seasonal trend (caused by the springtime regression of the cap) quasi 36 and 80-82 days cycles in residuals has been obtained. The sunspot activity spectra for the corresponding period is almost the same one. The local maximums of polar cap area residuals has been occured of about 10 days after the corresponding minimums of sunspot activity. The so obtained results are briefly discussed.
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