Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mmsai..52..389c&link_type=abstract
(NATO, Advanced Study Institute on Comparative Study of the Planets, Vulcano, Italy, Sept. 14-25, 1981.) Società Astronomica Ita
Astronomy and Astrophysics
Astronomy
Climatology, Mars Surface, Planetary Geology, Planetary Orbits, Polar Meteorology, Stratigraphy, Climate Change, Dust, Ice, Orbital Elements, Planetary Meteorology, Thickness
Scientific paper
Studies of the possibility of extracting a record of climatic, and thence orbital and axial, variations on Mars from the characteristics of layered deposits at the Martian poles are discussed. Tests of this hypothesis have included the measurement of terrace heights at a large number of locations within the polar deposits, from which it was found that typical layer thicknesses may be as low as 15 m or less. Two models of the orbital/axial control of polar stratigraphy have been considered: a uniform deposition rate model in which the major constituent of the deposits is laid down at a constant rate and the climate changes the concentration of a minor constituent modifying local erosion resistance, and a climate-modulated deposition rate model in which discrete layers are defined by intervals during which deposition of dust or ice slowed down or ceased temporarily. Models for the climate function, which depends on obliquity, eccentricity and longitude of perihelion, have also been developed which have a physical basis in Martian meteorology and surface processes.
Blasius Karl R.
Cutts James A. J.
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