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    Fazel-Rastgar, Farahnaz 2018. South polar permanent CO 2 ice cap presentation in the Global Mars Multiscale Model. Advances in Space Research, Vol. 61, Issue. 4, p. 1170.
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  • Print publication year: 2008
  • Online publication date: December 2009

25 - Martian polar processes

from Part V - Synthesis
    • By T. N. Titus, US Geological Survey Astrogeology Team 2255 N. Gemini Drive Flagstaff, AZ 86001-1698, USA, W. M. Calvin, Department of Geological Science, MS 172, University of Nevada Reno, NV 89557-0138, USA, H. H. Kieffer, Celestial Reasonings 2256 Christmas Tree Lane Carson City, NV 89703, USA, Y. Langevin, Institut d'Astrophysique Spatiale 91405 Orsay France, T. H. Prettyman, Los Alamos National Laboratory MS D466 Space and Atmospheric Science Los Alamos, NM 87545 USA
  • Edited by Jim Bell, Cornell University, New York
  • Publisher: Cambridge University Press
  • https://doi.org/10.1017/CBO9780511536076.026
  • pp 578-598
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Summary

ABSTRACT

The polar caps are the most active regions on Mars. The annual cycling of atmospheric CO2 into the seasonal CO2 ice caps is a driving force of the Martian climate. The polar layered deposits (PLDs), with thousands of layers whose thickness is only resolvable with sub-meter spatial resolution from orbit, may contain a record of past climates. The polar regions contain the majority of known H2O ice deposits, distributed between the residual caps and near-surface ice in the regolith. In this chapter, we synthesize results from missions and instruments largely presented in detail elsewhere in this book, and consider the implications for Martian polar processes and the areas for future research. The focus here is on presenting evidence for and interpretations concerning the CO2 cycle and other related polar processes. Implications for water-ice in the subsurface are examined with respect to its effects on the CO2 cycle. Comparisons of water-ice abundance to the mass and distribution of seasonal CO2 ice are also explored. While the amount of available data has increased exponentially, our knowledge and understanding of Martian polar processes has increased much more gradually. As each question about the polar regions of Mars is answered, several new questions are brought to light. Many of the processes that occur in the polar regions of Mars do not have direct analogs on Earth, but do have analogs in other parts of the Solar System.

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The Martian Surface
  • Online ISBN: 9780511536076
  • Book DOI: https://doi.org/10.1017/CBO9780511536076
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