globalchange  > 气候变化与战略
DOI: 10.1073/pnas.0608839103
论文题名:
Production of hydrogen peroxide in the atmosphere of a Snowball Earth and the origin of oxygenic photosynthesis
作者: Liang M.-C.; Hartman H.; Kopp R.E.; Kirschvink J.L.; Yung Y.L.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2006
卷: 103, 期:50
起始页码: 18896
结束页码: 18899
语种: 英语
英文关键词: Atmospheric processes ; Paleoproterozoic ; Photochemistry
Scopus关键词: hydrogen peroxide ; iron oxide ; manganese oxide ; oxygen ; hydrogen ; article ; atmosphere ; chemical model ; glacier ; hydrology ; oxidation ; Paleoproterozoic ; photochemistry ; photosynthesis ; priority journal ; water vapor ; astronomy ; biogenesis ; chemistry ; ice cover ; temperature ; Biogenesis ; Earth (Planet) ; Hydrogen ; Hydrogen Peroxide ; Ice Cover ; Models, Chemical ; Oxygen ; Photosynthesis ; Temperature
英文摘要: During Proterozoic time, Earth experienced two intervals with one or more episodes of low-latitude glaciation, which are probable "Snowball Earth" events. Although the severity of the historical glaciations is debated, theoretical "hard Snowball" conditions are associated with the nearly complete shutdown of the hydrological cycle. We show here that, during such long and severe glacial intervals, a weak hydrological cycle coupled with photochemical reactions involving water vapor would give rise to the sustained production of hydrogen peroxide. The photochemical production of hydrogen peroxide has been proposed previously as the primary mechanism for oxidizing the surface of Mars. During a Snowball, hydrogen peroxide could be stored in the ice; it would then be released directly into the ocean and the atmosphere upon melting and could mediate global oxidation events in the aftermath of the Snowball, such as that recorded in the Fe and Mn oxides of the Kalahari Manganese Field, deposited after the Paleoproterozoic low-latitude Makganyene glaciation. Low levels of peroxides and molecular oxygen generated during Archean and earliest Proterozoic non-Snowball glacial intervals could have driven the evolution of oxygen-mediating and -using enzymes and thereby paved the way for the eventual appearance of oxygenic photosynthesis. © 2006 by The National Academy of Sciences of the USA.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162474
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作者单位: Liang, M.-C., Division of Geological and Planetary Sciences, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, United States, Research Center for Environmental Changes, Academia Sinica, 128 Academia Road, Nankang, Taipei 115, Taiwan; Hartman, H., Center for Biomedical Engineering, Massachusetts Institute of Technology, 31 Ames Street, Cambridge, MA 02139-4307, United States; Kopp, R.E., Division of Geological and Planetary Sciences, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, United States; Kirschvink, J.L., Division of Geological and Planetary Sciences, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, United States; Yung, Y.L., Division of Geological and Planetary Sciences, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, United States

Recommended Citation:
Liang M.-C.,Hartman H.,Kopp R.E.,et al. Production of hydrogen peroxide in the atmosphere of a Snowball Earth and the origin of oxygenic photosynthesis[J]. Proceedings of the National Academy of Sciences of the United States of America,2006-01-01,103(50)
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