High Albedo Events Indicate Water Ice in Mars’ Southern Polar Craters
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چکیده
منابع مشابه
High-Resolution Topography and Albedo of the South Polar Layered Deposits on Mars
Using a new photoclinometric technique with high-resolution Mariner 9 images, maximum slopes of 10ø-20 ø are found to occur on an exposure of layered deposits within the south polar residual cap of Mars. Stereophotogrammetry is used to constrain the photoclinometric solutions, which resolve layer thicknesses of 100-300 m. Albedo variations are correlated with slope, indicating that frost is pre...
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There is significant geomorphologic evidence for the past presence of longitudinally widespread, latitudinally zoned deposits composed of ice-rich material at the northern and southern mid latitudes on Mars (lobate debris aprons, lineated valley fill, concentric crater fill, pedestal craters, etc.). Among these features, pedestal craters (Pd) are impact craters interpreted to have produced a pr...
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Five color/albedo units, including polar frost, have been recognized and mapped in the southern layered deposits on Mars. Atmospheric dust scattering was measured in shadows and modeled in order to remove the component of brightness in Mars images due to the atmosphere and quantify the albedo and color of the surface. The layered deposits appear to be mantied by red dust, except where eolian st...
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Introduction: Analyzing the present day morphology in the north polar region of Mars plays an important role in a better understanding of the climatic fluctuation forced by orbital changes and the paleoclimatic chatracteristics of the planet. Based on theoretical computations and observational evidences, the latitudinal distribution of H2O ice on Mars changes according to the orbital changes on...
متن کاملAmazonian mid- to high-latitude glaciation on Mars: Supply-limited ice sources, ice accumulation patterns, and concentric crater fill glacial flow and ice sequestration
Concentric crater fill (CCF) occurs in the interior of impact craters in midto high latitudes on Mars and is interpreted to have formed by glacial ice flow and debris covering. We use the characteristics and orientation of deposits comprising CCF, the thickness of pedestal deposits in midto high-latitude pedestal craters (Pd), the volumes of the current polar caps, and information about regiona...
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تاریخ انتشار 2009