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Tropical to mid-latitude snow and ice accumulation, flow and glaciation on Mars

机译:热带至中纬度地区的冰雪堆积,火星的流动和冰川化

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Images from the Mars Express HRSC (High-Resolution Stereo Camera) of debris aprons at the base of massifs in eastern Hellas reveal numerous concentrically ridged lobate and pitted features and related evidence of extremely ice-rich glacier-like viscous flow and sublimation. Together with new evidence for recent ice-rich rock glaciers at the base of the Olympus Mons scarp superposed on larger Late Amazonian debris-covered piedmont glaciers, we interpret these deposits as evidence for geologically recent and recurring glacial activity in tropical and mid-latitude regions of Mars during periods of increased spin-axis obliquity when polar ice was mobilized and redeposited in microenvironments at lower latitudes. The data indicate that abundant residual ice probably remains in these deposits and that these records of geologically recent climate changes are accessible to future automated and human surface exploration.
机译:来自火星快车HRSC(高分辨率立体摄像机)的海拉斯东部断层底部残骸围裙的图像显示出许多同心脊状的叶状和麻点状特征,以及相关的证据,显示出冰川极为丰富的冰川状粘性流动和升华。结合最近在奥林匹斯山(Olympus Mons)陡坡底部堆积在较大的晚期亚马逊残骸覆盖的山前冰川上的富冰岩石冰川的新证据,我们将这些沉积物解释为热带和中纬度地区近期地质和反复发生的冰川活动的证据。在低纬度的微环境中动员极地冰并重新沉积时,在自转轴倾角增加的时期内,火星的数量增加。数据表明,这些矿床中可能仍残留大量冰,并且未来的自动化和人类地表勘探都可以获取这些近期地质变化的记录。

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