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首页> 外文会议>Instruments, methods, and missions for astrobiology XIII >Astrobiological characteristics and possibility of life in the polar Dark Dune Spots of Mars
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Astrobiological characteristics and possibility of life in the polar Dark Dune Spots of Mars

机译：火星极地黑暗沙丘斑点的天体生物学特征和生命可能性

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摘要

The circumpolar region of Mars was surveyed for possible habitats in the area of seasonal ice cap. Dark Dune Spots were found to be good candidates as they are covered by water ice there without carbon-dioxide ice, and show flow-like features in springtime. Based on theoretical calculations interfacial water or bulk brine may be present there that decomposes the aggressive oxidants. Temperature values in springtime around noon could be favorable for metabolism of known extremophyles on Earth, and water uptake may be possible at nighttime. During the warm daytime period the water loss could be lowered by densely packed grain structure of the soil, hygroscopic salts, and polysaccharide-like materials, as it was observed in the samples of cryptobiotic crust from hot and cold deserts on Earth. This work outlines the basic elements of these possible circumpolar microhabitats.
机译：对火星的绕极地区进行了调查，以发现季节性冰盖区域内可能的栖息地。人们发现，黑暗的沙丘斑点是很好的候选者，因为那里被水冰覆盖而没有二氧化碳冰，并且在春季表现出类似流动的特征。根据理论计算，可能存在分解侵蚀性氧化剂的界面水或大量盐水。春季中午左右的温度值可能有利于地球上已知极端分子的代谢，并且夜间可能会吸水。在温暖的白天，水分的流失可以通过土壤的紧密堆积的谷物结构，吸湿性盐和类似多糖的物质来降低，正如在地球上冷漠沙漠中的隐生地壳样品中所观察到的那样。这项工作概述了这些可能的绕极微生境的基本要素。

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  • 来源
  • 会议地点 San Diego CA(US)
  • 作者

    Kereszturi A.; Berczi Sz.; Horvath A.; Pocs T.; Sik A.; Szathmary E.;

  • 作者单位

    Collegium Budapest Institute for Advanced Study, H-1014 Budapest, Szentharomag u. 2. Hungary Eotvos Lorand University of Sciences, Planetary Research Group, Hungary;

    Collegium Budapest Institute for Advanced Study, H-1014 Budapest, Szentharomag u. 2. Hungary Eotvos Lorand University of Sciences, Planetary Research Group, Hungary;

    Collegium Budapest Institute for Advanced Study, H-1014 Budapest, Szentharomag u. 2. Hungary Eotvos Lorand University of Sciences, Planetary Research Group, Hungary;

    Eotvos Lorand University of Sciences, Planetary Research Group, Hungary Eszterházy KárolyCollege, Hungary;

    Collegium Budapest Institute for Advanced Study, H-1014 Budapest, Szentharomag u. 2. Hungary Eotvos Lorand University of Sciences, Planetary Research Group, Hungary;

    Collegium Budapest Institute for Advanced Study, H-1014 Budapest, Szentharomag u. 2. Hungary;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空仪表、航空设备、飞行控制与导航;
  • 关键词

    Mars; polar regions; water; life; Dark Dune Spots;

    机译：火星;极地地区;水;生活;黑暗沙丘景点;

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