High altitude infrared spectroscopic evidence for bound water on Mars |
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| Authors: | JR Houck James B Pollack Carl Sagan David Schaack John A Decker |
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| Institution: | Center for Radiophysics and Space Research, Cornell University, Ithaca, New York 14850, USA;Ames Research Center-NASA, Moffett Field, California 94035, USA;Laboratory for Planetary Studies, Cornell University, Ithaca, New York 14850, USA;Center for Radiophysics and Space Research, Cornell University. Ithaca, New York 14850, USA;Spectral Imaging, Concord, Massachusetts 01742, USA |
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| Abstract: | The reflectivity of the Martian surface has been measured between 2.0 and 4.0 μ. A broad absorption band is observed which has a minimum at 2.85μm. The position and shape of the band is compared to features in numerous terrestrial minerals. Bound water in the Martian surface material is the most likely cause of the observed band. The strength of the observed band suggests a bound water content of approx. 1% by weight. The band is inconsistent with > a few % limonito or hydrated polymeric carbon suboxide. A mean particle radius ～100μm is deduced. The quality of bound water derived has a range of geological, climatic, and exobiological implications |
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