Strong oxidizer in the Martian atmosphere observed by MEX/PFS

Details Strong oxidizer in the Martian atmosphere observed by MEX/PFS Strong oxidizer in the Martian atmosphere observed by MEX/PFS

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010eguga..12.5855a&link_type=abstract

EGU General Assembly 2010, held 2-7 May, 2010 in Vienna, Austria, p.5855

Physics

Scientific paper

It has been suggested the large and fast variations of methane in Martian atmosphere could be caused by oxidation with H2O2, which could be produced in quantities much larger than foreseen by water photochemistry during dust storms by means of electrostatic charging of the dust grains. Past measurements of H2O2 mixing ratios are few and contradictory with photochemistry model. We performed a sensitive search for Martian H2O2, its mixing ratio, and its variation from continuous observations with Planetary Fourier Spectroscopy (PFS) aboard Mars Express (MEX). We could find possible lines of H2O2 not contaminated by strong water lines. Large mixing ratio H2O2 exists through out 2004 and 2007, although the photochemistry models still predict lower mixing ratio.

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