Comment on "A Hydrogen-Rich Early Earth Atmosphere"
Open Access
- 6 January 2006
- journal article
- editorial
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 311 (5757) , 38
- https://doi.org/10.1126/science.1117827
Abstract
Tian et al. (Reports, 13 May 2005, p. 1014) proposed a hydrogen-rich early atmosphere with slow hydrogen escape from a cold thermosphere. However, their model neglects the ultraviolet absorption of all gases other than H 2 . The model also neglects Earth's magnetic field, which affects the temperature and density of ions and promotes nonthermal escape of neutral hydrogen.Keywords
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