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    Stratigraphy and evolution of the buried CO2 deposit in the Martian south polar cap

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    Name:
    Bierson_et_al-2016-Geophysical ...
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    Final Published Version
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    Author
    Bierson, C. J.
    Phillips, R. J.
    Smith, I. B.
    Wood, S. E.
    Putzig, N. E.
    Nunes, D.
    Byrne, S.
    Affiliation
    Univ Arizona, Lunar & Planetary Lab
    Issue Date
    2016-05-16
    
    Metadata
    Show full item record
    Publisher
    AMER GEOPHYSICAL UNION
    Citation
    Bierson, C. J., Phillips, R. J., Smith, I. B., Wood, S. E., Putzig, N. E., Nunes, D., and Byrne, S. ( 2016), Stratigraphy and evolution of the buried CO2 deposit in the Martian south polar cap, Geophys. Res. Lett., 43, doi:10.1002/2016GL068457.
    Journal
    GEOPHYSICAL RESEARCH LETTERS
    Rights
    © 2016. American Geophysical Union. All Rights Reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Observations by the Shallow Radar instrument on Mars Reconnaissance Orbiter reveal several deposits of buried CO2 ice within the south polar layered deposits. Here we present mapping that demonstrates this unit is 18% larger than previously estimated, containing enough mass to double the atmospheric pressure on Mars if sublimated. We find three distinct subunits of CO2 ice, each capped by a thin (10-60 m) bounding layer (BL). Multiple lines of evidence suggest that each BL is dominated by water ice. We model the history of CO2 accumulation at the poles based on obliquity and insolation variability during the last 1 Myr assuming a total mass budget consisting of the current atmosphere and the sequestered ice. Our model predicts that CO2 ice has accumulated over large areas several times during that period, in agreement with the radar findings of multiple periods of accumulation.
    Note
    6 month embargo; first published: 25 April 2016
    ISSN
    0094-8276
    EISSN
    1944-8007
    DOI
    10.1002/2016gl068457
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.1002/2016gl068457
    Scopus Count
    Collections
    UA Faculty Publications

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