Are H and O Being Lost From the Mars Atmosphere in the H2O Stoichiometric Ratio of 2:1?

Bruce Martin Jakosky, Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States, Michael Chaffin, University of Colorado Boulder, Laboratory for Atmospheric and Space Physics, Boulder, United States, Justin Deighan, Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, Dave A Brain, University of Colorado at Boulder, Laboratory for Atmospheric and Space Physics, Boulder, United States and Jasper S Halekas, University of California Berkeley, Berkeley, CA, United States