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dc.contributor.authorCross, Andrew J.  Concept link
dc.contributor.authorGoldsby, David L.  Concept link
dc.contributor.authorHager, Travis F.  Concept link
dc.contributor.authorSmith, Isaac B.  Concept link
dc.date.accessioned2020-10-15T15:31:05Z
dc.date.available2020-10-15T15:31:05Z
dc.date.issued2020-10-13
dc.identifier.urihttps://hdl.handle.net/1912/26314
dc.description.abstractVast amounts of solid CO2 reside in topographic basins of the south polar layered deposits (SPLD) on Mars and exhibit morphological features indicative of glacial flow. Previous experimental studies showed that coarse-grained CO2 ice is 1–2 orders of magnitude weaker than water ice under Martian polar conditions. Here we present data from a series of deformation experiments on high-purity, fine-grained CO2 ice over a broader range of temperatures than previously explored (158–213 K). The experiments confirm previous observations of highly non-linear power-law creep at larger stresses, but also show a transition to a previously-unseen linear-viscous creep regime at lower stresses. We examine the viscosity of CO2 within the SPLD and predict that the CO2-rich layers may be stronger than previously thought. We also predict that CO2 ice flows much more readily than H2O ice on steep flanks of SPLD topographic basins, allowing the CO2 to pond as observed.en_US
dc.description.sponsorshipNational Aeronautics and Space Administration (NASA) NNH16ZDA001N-SSWen_US
dc.publisherWoods Hole Oceanographic Institutionen_US
dc.relation.ispartofhttps://hdl.handle.net/1912/26703
dc.titleThe rheological behavior of CO2 ice: application to glacial flow on Marsen_US
dc.typeDataseten_US
dc.identifier.doi10.26025/1912/26314


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