A hydrogen-rich early Earth atmosphere

被引：268

作者：

Tian, F ^{[1
]}

Toon, OB

Pavlov, AA

De Sterck, H

机构：

[1] Univ Colorado, Astrophys & Planetary Sci Dept, Boulder, CO 80309 USA

[2] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA

[3] Univ Colorado, Program Atmospher & Ocean Sci, Boulder, CO 80309 USA

[4] Univ Waterloo, Dept Appl Math, Waterloo, ON N2L 3G1, Canada

来源：

SCIENCE | 2005年 / 308卷 / 5724期

关键词：

D O I：

10.1126/science.1106983

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We show that the escape of hydrogen from early Earth's atmosphere likely occurred at rates slower by two orders of magnitude than previously thought. The balance between slow hydrogen escape and volcanic outgassing could have maintained a hydrogen. mixing ratio of more than 30%. The production of prebiotic organic compounds in such an atmosphere would have been more efficient than either exogenous delivery or synthesis in hydrothermal systems. The organic soup in the oceans and ponds on early Earth would have been a more favorable place for the origin of life than previously thought.

引用

页码：1014 / 1017

页数：4

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