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dc.contributor.authorSori, Michael M.
dc.contributor.authorBapst, Jonathan
dc.contributor.authorBecerra, Patricio
dc.contributor.authorByrne, Shane
dc.date.accessioned2019-11-15T20:37:52Z
dc.date.available2019-11-15T20:37:52Z
dc.date.issued2019
dc.identifier.citationSori, M. M., Bapst, J., Becerra, P., & Byrne, S. (2019). Islands of ice on Mars and Pluto. Journal of Geophysical Research: Planets, 124, 2522–2542. https://doi.org/10.1029/2018JE005861en_US
dc.identifier.issn2169-9097
dc.identifier.doi10.1029/2018je005861
dc.identifier.urihttp://hdl.handle.net/10150/636169
dc.description.abstractIce sheets, such as the polar layered deposits (PLDs) of Mars, are of great interest as records of past climate. Smaller outlier ice deposits near the north and south PLDs are likely more sensitive to climate changes and thus may hold information about more recent climate history. However, the southern outlier deposits have largely remained unmapped and unanalyzed. Here, we identify 31 deposits near, but separated from, Mars's south PLDs, all of which are located within impact craters >15 km in diameter. On the basis of morphology, radar analysis, physical similarity to portions of the PLD margin, and overall similarity to previously described deposits in Mars's north polar region, we conclude that these deposits are primarily composed of water ice. An additional 66 craters contain smaller depositional features, some of which may be remnant ice deposits. The 31 outlier ice deposits represent a previously unquantified inventory of water on Mars, with a total volume between 15,000 and 38,000 km(3). In addition, we identify five analogous outlier nitrogen ice deposits located within impact craters near Sputnik Planitia, the large nitrogen ice sheet on Pluto. Although important differences exist between Mars and Pluto, broad physical similarities between the two cases suggest that the topography and microclimates of impact craters cause them to be favorable locations for volatile accumulation and/or retention throughout the Solar System.en_US
dc.description.sponsorshipNASA's Mars Data Analysis Program National Aeronautics & Space Administration (NASA) [80NSSC17K0510]en_US
dc.language.isoenen_US
dc.publisherAMER GEOPHYSICAL UNIONen_US
dc.rights© 2019. American Geophysical Union. All Rights Reserved.en_US
dc.subjectice moundsen_US
dc.subjectvolatilesen_US
dc.subjectcratersen_US
dc.subjectsouth polar layered depositsen_US
dc.subjectSputnik Planitiaen_US
dc.titleIslands of ice on Mars and Plutoen_US
dc.typeArticleen_US
dc.identifier.eissn2169-9100
dc.contributor.departmentUniv Arizona, Lunar & Planetary Laben_US
dc.identifier.journalJOURNAL OF GEOPHYSICAL RESEARCH-PLANETSen_US
dc.description.note6 month embargo; published online 15 Oct 2019en_US
dc.description.collectioninformationThis 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.en_US
dc.eprint.versionFinal published versionen_US
dc.source.volume124
dc.source.issue10
dc.source.beginpage2522-2542


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