Resonant obliquity of Mars?

Details Resonant obliquity of Mars? Resonant obliquity of Mars?

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...94..160w&link_type=abstract

Icarus (ISSN 0019-1035), vol. 94, Nov. 1991, p. 160-164.

Physics

29

Climate, Mars Environment, Orbital Resonances (Celestial Mechanics), Planetary Evolution, Spin-Orbit Interactions, Oblate Spheroids, Planetary Rotation, Precession, Secular Variations

Scientific paper

The large-scale oscillations generated by the obliquity of Mars through spin-axis and orbit-plane precessions constitute basic climate system drivers with periodicities of 100,000 yrs in differential spin axis-orbit precession rates and of over 1 million yrs in amplitude modulations due to orbital-inclination changes. Attention is presently given to a third time-scale for climate change, which involves a possible spin-spin resonance and whose mechanism operates on a 10-million-yr time-scale: this effect implies an average obliquity increase for Mars of 15 deg only 5 million yrs ago, with important climatic consequences.

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