title: Infrared spectroscopy experiment on the mariner 9 mission: preliminary results.
abstract: The Mariner 9 infrared spectroscopy experiment has provided goodquality spectra of many areas of Mars, predominantly in the southern hemisphere. Large portions of the thermal emission spectra are significantly affected by dust with a silicon oxide content approximately corresponding to that of an intermediate igneous rock, thus implying that Mars has undergone substantial geochemical differentiation. Derived temperature profiles indicate a warm daytime upper atmosphere with a strong warming over the south polar cap. Atmospheric water vapor is clearly observed over the south polar area and less strongly over other regions.
authors.forename: R A
authors.initials: RA
authors.lastname: Hanel
authors.forename: B J
authors.initials: BJ
authors.lastname: Conrath
authors.forename: W A
authors.initials: WA
authors.lastname: Hovis
authors.forename: V G
authors.initials: VG
authors.lastname: Kunde
authors.forename: P D
authors.initials: PD
authors.lastname: Lowman
authors.forename: J C
authors.initials: JC
authors.lastname: Pearl
authors.forename: C
authors.initials: C
authors.lastname: Prabhakara
authors.forename: B
authors.initials: B
authors.lastname: Schlachman
authors.forename: G V
authors.initials: GV
authors.lastname: Levin