Distribution of hydrogen in the near surface of Mars: evidence for subsurface ice deposits.

@article{Boynton2002DistributionOH,
  title={Distribution of hydrogen in the near surface of Mars: evidence for subsurface ice deposits.},
  author={W. V. Boynton and William C. Feldman and Steve Squyres and T H Prettyman and Judith B. Bruckner and Larry G. Evans and R. C. Reedy and Renate L Starr and James R. Arnold and Darrell M. Drake and P A J Englert and Albert E. Metzger and Igor Sansonetti Mitrofanov and Jacob I. Trombka and C. d'Uston and Heike Wanke and Olivier Gasnault and David K. Hamara and Donna M Janes and Robert L. Marcialis and Sylvestre Maurice and Irina B Mikheeva and G. Jeffrey Taylor and Robert L. Tokar and Christopher Shinohara},
  journal={Science},
  year={2002},
  volume={297 5578},
  pages={81-5}
}
Using the Gamma-Ray Spectrometer on the Mars Odyssey, we have identified two regions near the poles that are enriched in hydrogen. The data indicate the presence of a subsurface layer enriched in hydrogen overlain by a hydrogen-poor layer. The thickness of the upper layer decreases with decreasing distance to the pole, ranging from a column density of about 150 grams per square centimeter at -42 degrees latitude to about 40 grams per square centimeter at -77 degrees. The hydrogen-rich regions… CONTINUE READING