The composition of the atmosphere at the surface of Mars
The composition of the atmosphere at the surface of Mars
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DOI：
10.1029/js082i028p04635
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发表时间：
1977-09
影响因子：
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通讯作者：
T. Owen;K. Biemann;D. R. Rushneck;J. Biller;D. W. Howarth;A. Lafleur
中科院分区：
文献类型：
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作者：
T. Owen;K. Biemann;D. R. Rushneck;J. Biller;D. W. Howarth;A. Lafleur
我们已经证实了进入科学团队发现的N2和40 Ar，我们还检测到Ne，Kr，Ar和Ar的原始同位素。稀有气体的丰度模式与地球大气中的丰度模式和陨石气体的原始成分相似。与地球上的陨石比例相比，氙似乎是不充足的。同位素比值15 N/14 N、40 Ar/36 Ar和129 Ar/132 Ar与地球上的比值明显不同，表明两颗行星上挥发物的演化历史不同。惰性气体丰度表明，在地质时期，地球释放的N2至少是目前大气中N2丰度的10倍，CO2丰度的20倍;大量水的脱气也必须发生。因此，有一个解释高表面压力和丰富的水需要在一些早期的时代切割树枝状通道观察到火星表面。
We have confirmed the discovery of N2 and 40Ar by the Entry Science Team, and we have also detected Ne, Kr, Xe, and the primordial isotopes of Ar. The noble gases exhibit an abundance pattern similar to that found in the terrestrial atmosphere and the primordial component of meteoritic gases. Xenon appears to be underabundant in comparison to the meteoritic ratio, as it is on earth. The isotopic ratios 15N/14N, 40Ar/36Ar, and 129Xe/132Xe are distinctly different from the terrestrial values, implying different evolutionary histories for volatiles on the two planets. The noble gas abundances indicate that at least 10 times the present atmospheric amount of N2 and 20 times the CO2 abundance were released by the planet during geologic time; the outgassing of a large amount of water must also have taken place. There is thus an explanation for the high surface pressure and abundance of water required at some early epoch to cut the dendritic channels observed on the Martian surface.