Observations of the north polar region of Mars from the Mars orbiter laser altimeter.

  title={Observations of the north polar region of Mars from the Mars orbiter laser altimeter.},
  author={Maria T. Zuber and David Eugene Smith and Sean C. Solomon and James B. Abshire and Robert S. Afzal and Oded Aharonson and Kathryn Elspeth Fishbaugh and Peter G. Ford and Herbert V. Frey and James B Garvin and James W. Head and Anton B. Ivanov and C. L. Johnson and Duane O. Muhleman and Gregory A. Neumann and Gordon H. Pettengill and Roger J. Phillips and X. Sun and H. Jay Zwally and W. B. Banerdt and Thomas C. Duxbury},
  volume={282 5396},
Elevations from the Mars Orbiter Laser Altimeter (MOLA) have been used to construct a precise topographic map of the martian north polar region. The northern ice cap has a maximum elevation of 3 kilometers above its surroundings but lies within a 5-kilometer-deep hemispheric depression that is contiguous with the area into which most outflow channels emptied. Polar cap topography displays evidence of modification by ablation, flow, and wind and is consistent with a primarily H2O composition… Expand
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