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Chemical pathway analysis of the lower Martian atmosphere: The CO_2 stability problem

机译:低火星大气的化学路径分析:CO_2稳定性问题

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摘要

The chemical composition and hence the structure of terrestrial planetary atmospheres can be critically controlled by trace species which can act in catalytic cycles. Identifying such chemical pathways is in general challenging. Due to the complexity of chemical reaction networks, like those used in Martian atmospheric chemistry, automated methods become more and more useful to cope with this task. Here, we investigate the applicability of a unique analysis tool PAP (Pathway Analysis Program) to the chemistry at Mars' atmospheric surface conditions, for which we have developed a photochemical box-model. PAP is applied for the first time to the output of this model to investigate the well-known CO_2 stability problem of the Martian atmosphere. We identify and rank the most dominant pathways responsible for CO_2 formation and prove thereby the applicability of PAP for Mars atmospheric conditions by comparison with known chemical cycles. Furthermore, we propose here an additional new catalytic CO_2 formation cycle which is also involved in the production of ozone.
机译:可以通过能在催化循环中起作用的微量物质来严格控制地球行星大气的化学组成和结构。识别此类化学途径通常具有挑战性。由于化学反应网络的复杂性(如火星大气化学中使用的网络),因此自动化方法对于应对这一任务越来越有用。在这里,我们研究了一种独特的分析工具PAP(路径分析程序)在火星大气表面条件下对化学物质的适用性,为此我们开发了一种光化学盒模型。 PAP首次应用于该模型的输出,以研究火星大气层中众所周知的CO_2稳定性问题。我们确定并排名最主要的途径负责CO_2的形成,并通过与已知的化学循环比较,证明PAP在火星大气条件下的适用性。此外,我们在这里提出了另外一个新的催化CO_2形成循环,该循环也与臭氧的产生有关。

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  • 来源
    《Planetary and space science》 |2012年第1期|p.18-24|共7页
  • 作者单位

    Institut fuer Planetenforschung, Deutsches Zentrum fuer Luft- und Raumfahrt (DLR), Rutherfordstr. 2, 12489 Berlin, Germany;

    Zentrum fuer Astronomie und Astrophysik (ZAA), Technische Universkat Berlin (TUB), Hardenbergstr. 36, 10623 Berlin, Germany;

    Alfred-Wegener-Institut fur Polar- und Meeresforschung (AWI), Telegrafenberg A43, 14473 Potsdam, Germany;

    Zentrum fuer Astronomie und Astrophysik (ZAA), Technische Universkat Berlin (TUB), Hardenbergstr. 36, 10623 Berlin, Germany;

    Institut fuer Planetenforschung, Deutsches Zentrum fuer Luft- und Raumfahrt (DLR), Rutherfordstr. 2, 12489 Berlin, Germany,Zentrum fuer Astronomie und Astrophysik (ZAA), Technische Universkat Berlin (TUB), Hardenbergstr. 36, 10623 Berlin, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    mars; atmosphere; photochemistry; chemical pathway analysis; reaction sequences;

    机译:火星;大气层;光化学化学途径分析;反应顺序;

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