Next Steps Forward in Understanding Martian Surface and Subsurface Chemistry

作者：Carrier Brandi L^*

来源：JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, 2017, 122(9): 1951-1953.

DOI：10.1002/2017JE005409

The presence of oxidants such as hydrogen peroxide (H2O2) and perchlorate (ClO4-), which have been detected on Mars, has significant implications for chemistry and astrobiology. These oxidants can increase the reactivity of the Martian soil, accelerate the decomposition of organic molecules, and depress the freezing point of water. The study by Crandall et al. "Can Perchlorates be Transformed to Hydrogen Peroxide Products by Cosmic Rays on the Martian Surface" reveals a new formation mechanism by which hydrogen peroxide and other potential oxidants can be generated via irradiation of perchlorate by cosmic rays. This study represents an important next step in developing a full understanding of Martian surface and subsurface chemistry, particularly with respect to degradation of organic molecules and potential biosignatures.

• 出版日期2017-9