Critical Masses for Various Terrestrial Planet Atmospheric Gases and Water in/on Mars

	Critical Masses for Various Terrestrial Planet Atmospheric Gases and Water in/on Mars
	Lin-gun Liu
	2014
发表期刊	TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
卷号	25 期号:5 页码:703-707
摘要	The lower critical mass boundaries (CM) for various atmospheric gas species on terrestrial planets are estimated. The CM is different for different gas molecules. Except for He, the observed atmospheric compositions of the terrestrial planets are consistent with these estimates. The lower CM boundary for gaseous H2O is calculated as 8.06 x 10(26) g, which is significantly greater than the Martian mass (6.419 x 10(26) g). Thus, Mars is not capable of retaining H2O in its atmosphere. If the speculated ocean on Mars and the claimed H2O ice in the Martian soil are true, both the ocean and ice had to be derived earlier from H2O degassed from the Martian interior after the surface temperature cooled much below 100 degrees C. These watery bodies cannot be sustained for long durations because evaporation and sublimation would turn them into gaseous H2O, which would be lost to outer-space. It is concluded that H2O in/on Mars is inherent and that the primordial planetesimals that formed Mars must have contained appreciable amounts of hydrous minerals, if the oceans and/or H2O ice on Mars are true.
关键词	Critical Mass Atmospheric Composition Water Mars
学科领域	地球深部物质与流体作用地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5279
专题	地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文
推荐引用方式 GB/T 7714	Lin-gun Liu. Critical Masses for Various Terrestrial Planet Atmospheric Gases and Water in/on Mars[J]. TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES,2014,25(5):703-707.
APA	Lin-gun Liu.(2014).Critical Masses for Various Terrestrial Planet Atmospheric Gases and Water in/on Mars.TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES,25(5),703-707.
MLA	Lin-gun Liu."Critical Masses for Various Terrestrial Planet Atmospheric Gases and Water in/on Mars".TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES 25.5(2014):703-707.

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