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H20 at the phoenix landing site

  • P. H. Smith
  • , L. K. Tamppari
  • , R. E. Arvidson
  • , D. Bass
  • , D. Blaney
  • , W. V. Boynton
  • , A. Carswell
  • , D. C. Catling
  • , B. C. Clark
  • , T. Duck
  • , E. DeJong
  • , D. Fisher
  • , W. Goetz
  • , H. P. Gunnlaugsson
  • , M. H. Hecht
  • , V. Hipkin
  • , J. Hoffman
  • , S. F. Hviid
  • , H. U. Keller
  • , S. P. Kounaves
  • C. F. Lange, M. T. Lemmon, M. B. Madsen, W. J. Markiewicz, J. Marshall, C. P. McKay, M. T. Mellon, D. W. Ming, R. V. Morris, W. T. Pike, N. Renno, U. Staufer, C. Stoker, P. Taylor, J. A. Whiteway, A. P. Zent

Research output: Contribution to journalArticlepeer-review

Abstract

The Phoenix mission investigated patterned ground and weather in the northern arctic region of Mars for 5 months starting 25 May 2008 (solar longitude between 76.5° and 148°). A shallow ice table was uncovered by the robotic arm in the center and edge of a nearby polygon at depths of 5 to 18 centimeters. In late summer, snowfall and frost blanketed the surface at night; H2O ice and vapor constantly interacted with the soil. The soil was alkaline (pH = 7.7) and contained CaCO3, aqueous minerals, and salts up to several weight percent in the indurated surface soil. Their formation likely required the presence of water.

Original languageEnglish (US)
Pages (from-to)58-61
Number of pages4
JournalScience
Volume325
Issue number5936
DOIs
StatePublished - Jul 3 2009

ASJC Scopus subject areas

  • General

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