Sulfuric acid on Europa and the radiolytic sulfur cycle

被引：289

作者：

Carlson, RW

Johnson, RE

Anderson, MS

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[2] Univ Virginia, Sch Engn & Appl Sci, Charlottesville, VA 22903 USA

来源：

SCIENCE | 1999年 / 286卷 / 5437期

关键词：

D O I：

10.1126/science.286.5437.97

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：

A comparison of laboratory spectra with Galileo data indicates that hydrated sulfuric acid is present and is a major component of Europa's surface. In addition, this moon's visually dark surface material, which spatially correlates with the sulfuric acid concentration, is identified as radiolytically altered sulfur polymers. Radiolysis of the surface: by magnetospheric plasma bombardment continuously cycles sulfur between three forms: sulfuric acid, sulfur dioxide, and sulfur polymers, with sulfuric acid being about 50 times as abundant as the other forms. Enhanced sulfuric acid concentrations are found in Europa's geologically young terrains, suggesting that low-temperature, liquid sulfuric acid may influence geological processes.

引用

页码：97 / 99

页数：5

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