Orbital forcing of the martian polar layered deposits

  title={Orbital forcing of the martian polar layered deposits},
  author={Jacques Laskar and Benjamin Levrard and John F. Mustard},
Since the first images of polar regions on Mars revealed alternating bright and dark layers, there has been speculation that their formation might be tied to the planet's orbital climate forcing. But uncertainties in the deposition timescale exceed two orders of magnitude: estimates based on assumptions of dust deposition, ice formation and sublimation, and their variations with orbital forcing suggest a deposition rate of 10-3 to 10-2 cm yr-1 (refs 5, 6), whereas estimates based on cratering… 
Obliquity dependence of the formation of the martian polar layered deposits
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Dependence upon obliquity of the formation of martian PLD vertical structure
Abstract Mars' polar layered deposits (PLD) are comprised of layers of varying dust-to-water ice volume mixing ratios (VMR) that are thought to record astronomically-forced climatic variation over
Timescales of the Climate Record in the South Polar Ice Cap of Mars
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Recent formation and evolution of northern Martian polar layered deposits as inferred from a Global Climate Model
[1] We present a time-marching model which simulates the exchange of water ice between the Martian northern cap, the tropics, and a high-latitude surface reservoir. Net annual exchange rates of water
Is there an orbital signal in the polar layered deposits on Mars
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Stratigraphy and evolution of the buried CO2 deposit in the Martian south polar cap
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Recent ice ages on Mars
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Reading the climate record of the martian polar layered deposits
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Recent ice-rich deposits formed at high latitudes on Mars by sublimation of unstable equatorial ice during low obliquity
Using the ice accumulation rates estimated from global climate model simulations, it is shown that, over the past ten million years, large variations of Mars' obliquity have allowed the formation of such metres-thick, sedimentary layered deposits in high latitude and polar regions.


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Abstract Layered strata observed in orbital images of polar sedimentary terrains on Mars have been hypothesized to contain information about recent variations in the Martian climate. Celestial
Surface Ages and Resurfacing Rates of the Polar Layered Deposits on Mars
Interpretation of the polar stratigraphy of Mars in terms of global climate changes is complicated by the significant difference in surface ages between the north and south polar layered terrains
A topographically forced asymmetry in the martian circulation and climate
It is shown that Mars' global north–south elevation difference forces a dominant southern summer Hadley circulation that is independent of perihelion timing, which imprints a strong handedness on climate, with water ice and the active formation of polar layered deposits more likely in the north.
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Using topography collected from the Mars Orbiter Laser Altimeter on the MGS spacecraft, temporal changes in the elevation of the martian surface that correlate with the seasonal cycle of carbon dioxide exchange between the surface and atmosphere are measured.
Sublimation and transport of water from the north residual polar cap on Mars
Several features of the Viking Mars atmospheric water detection observations have suggested that the residual north polar cap on Mars is a major source of atmospheric water during northern summer and