Temperature response of Mars to Milankovitch cycles

  title={Temperature response of Mars to Milankovitch cycles},
  author={Norbert Schorghofer},
  journal={Geophysical Research Letters},
  • N. Schorghofer
  • Published 1 September 2008
  • Physics
  • Geophysical Research Letters
On Mars annual mean surface temperature near ±60° latitude varies predominately with precession and is not closely related to annual mean insolation. Based on the last few million years of orbital history, the precession cycle dominates in a narrow latitude range 54°–65°, in which the margins of the two ice‐rich permafrost layers in each hemisphere happen to lie, while mean annual temperature at other latitudes is controlled by the obliquity cycle. The phenomenon already exists on an airless… 
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High-resolution climate simulations performed with a model designed to simulate the present-day Mars water cycle but assuming a 45° obliquity points to an atmospheric origin for the ice and reveals how precipitation could have formed glaciers on Mars.
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  • N. Schorghofer
  • Environmental Science
    Physical review. E, Statistical, nonlinear, and soft matter physics
  • 2007
A decomposition method to evaluate the contribution of short term weather events to ground ice stability is developed; when applied to a study site in the Dry Valleys, it reveals that the coldest periods contribute most to stabilization.
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Simulations of the retreat and growth of ground ice as a result of sublimation loss and recharge reveal forty major ice ages over the past five million years of Mars, and how the subsurface ice sheets could have evolved to the state in which the authors see them today is explained.
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Climatic variations on Mars: 1. Astronomical theory of insolation
This paper describes variations in the solar insolation on Mars that result from oscillations of the orbital eccentricity (0.005 ≲ e ≲ 0.141) and the obliquity (14.9° ≲ θ ≲ 35.5°) of the planet.