Physics
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982icar...50..129c&link_type=abstract
(Workshop on Quasi-Periodic Climatic Changes on Earth and Mars, Moffett Field, CA, Feb. 24-26, 1981.) Icarus, vol. 50, May-June
Physics
35
Climate Change, Climatology, Mars Surface, Periodic Variations, Polar Regions, Topography, Carbon Dioxide, Dust Storms, Eccentric Orbits, Mineral Deposits, Orbit Perturbation, Solar Orbits
Scientific paper
The layered terrain at the pols of Mars preserves a record of cyclic sedimentation that is probably caused by periodic changes in global climates, and the surface topography of these deposits also exhibits cyclic elements that may be related to the same climate changes. The site of dust accumulation will alternate from pole to pole with the 51,000-year precessional cycle. Longer-term cyclic variations in erosion and deposition may be caused by eccentricity and obliquity variations, and orbital and rotational motion variations may also result in an interchange of volatiles between the atmosphere and the near-surface materials that causes periodic variations in atmospheric pressure having further climatic effects. The lack of impact craters on the surface and the lack of interruption of the layers by impact scars suggest that the polar deposits are only a few million years old.
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