Concentrated perchlorate at the Mars Phoenix landing site: Evidence for thin film liquid water on Mars
Concentrated perchlorate at the Mars Phoenix landing site: Evidence for thin film liquid water on Mars
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DOI：
10.1029/2010gl045269
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发表时间：
2010-11-20
影响因子：
5.2
通讯作者：
Lemmon, Mark
中科院分区：
文献类型：
--
作者：
Cull, Selby C.;Arvidson, Raymond E.;Lemmon, Mark
2008年，美国宇航局的凤凰号使命在火星北方平原着陆，返回的证据表明，高氯酸盐阴离子均匀分布在着陆点的土壤柱中。在这里，我们使用来自凤凰号表面立体成像仪的光谱数据来绘制凤凰号着陆点高氯酸盐的分布图，并发现高氯酸盐已局部集中到地下斑块中，类似于地球上水溶解和再分布产生的盐斑块。我们建议，薄膜的液态水是负责转运高氯酸盐从表面到地下，并集中在补丁。薄膜被解释为与季节性和长期性周期有关的小冰盖融化的结果。引文：Cull，S.C.，R.E. Arvidson，J.G. Catalano，D.W. Ming，R.V. Morris，M.T. Mellon和M. Lemmon（2010），Concentrated perchlorate at the Mars Phoenix landing site：Evidence for thin film liquid water on Mars，Geophys.保留信函：37，L22203，doi：10.1029/2010GL045269。
NASA's Phoenix mission, which landed on the northern plains of Mars in 2008, returned evidence of the perchlorate anion distributed evenly throughout the soil column at the landing site. Here, we use spectral data from Phoenix's Surface Stereo Imager to map the distribution of perchlorate salts at the Phoenix landing site, and find that perchlorate salt has been locally concentrated into subsurface patches, similar to salt patches that result from aqueous dissolution and redistribution on Earth. We propose that thin films of liquid water are responsible for translocating perchlorate from the surface to the subsurface, and for concentrating it in patches. The thin films are interpreted to result from melting of minor ice covers related to seasonal and long-term obliquity cycles. Citation: Cull, S.C., R.E. Arvidson, J.G. Catalano, D.W. Ming, R.V. Morris, M.T. Mellon, and M. Lemmon (2010), Concentrated perchlorate at the Mars Phoenix landing site: Evidence for thin film liquid water on Mars, Geophys. Res. Lett., 37, L22203, doi:10.1029/2010GL045269.