Obliquity-oblateness feedback on Mars
نویسندگان
چکیده
منابع مشابه
Climate Change of Mars: Effects of Obliquity
Introduction: Behaviors of the Martian climate system has been investigated in several studies [e.g., 1-4]. If the Martian climate was warm owing to the greenhouse effect of CO 2 in the past, a drastic climate change (climate jump or climate collapse) due to decrease in the amount of CO 2 in the system must have occurred during the evolution from a warm condition to the present cold condition [...
متن کاملNon-chaotic Obliquity Variations of Mars
Introduction: In the absence of energy dissipation, obliquity variations of Mars would likely be chaotic. However, relatively small amounts of dissipation suffice to suppress the chaotic variations. Tidal dissipation within Mars, as constrained by the observed evolution of the orbit of Phobos, appears sufficient to regularize the obliquity variations. If Mars has a fluid core, viscous core-mant...
متن کاملModeling the Effect of Obliquity on Mars Elliptical Crater Orientations
Introduction: Obliquity is a strong control on post-Noachian Martian climate [1]. However, Martian obliquity is chaotic and dynamical models produce a wide range of instantaneous and long-term average values [2]. Here, we model the effect of Mars mean obliquity on the distribution of fresh elliptic crater orientations. To achieve this we used an N-body simulation to estimate the time-averaged d...
متن کاملObliquity Driven Climate Change in Mars' Recent Past
Forget, A. Spiga, and A. Colaprete. Space Science Division, MS 245-3, NASA/Ames Research Center, Moffett Field CA, 94035, [email protected]. Laboratoire de Météorolgie Dynamique, Universite Paris, 4 pl. Jussieu, 75252 Paris Cedex 05-FRANCE, [email protected]. Ecole Polytechnique, 91128 Palaiseau, Cedex FRANCE, [email protected]. SETI Institute, Space Science Division, ...
متن کاملLarge-scale variations in the obliquity of Mars.
Large-scale variations in the obliquity of the planet Mars are produced by a coupling between the motion of its orbit plane due to the gravitational perturbations of the other planets and the precession of its spin axis which results from the solar torque exerted on the equatorial bulge of the planet. The obliquity oscillates on a time scale of approximately 1.2 x 10(5) years. The amplitude of ...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Planets
سال: 1999
ISSN: 0148-0227
DOI: 10.1029/1999je001057