Thermal Emission Spectrometer results: Mars atmospheric thermal structure and aerosol distribution

Infrared spectra returned by the Thermal Emission Spectrometer (TES) are well suited for retrieval of the thermal structure and the distribution of aerosols in the Martian atmosphere. Combined nadir- and limb-viewing spectra allow global monitoring of the atmosphere up to 0.01 mbar (65 km). We report here on the atmospheric thermal structure and the distribution of aerosols as observed thus far during the mapping phase of the Mars Global Surveyor mission. Zonal and temporal mean cross sections are used to examine the seasonal evolution of atmospheric temperatures and zonal winds during a period extending from northern hemisphere mid-summer through vernal equinox (L, = 104°-360°). Temperature maps at selected pressure levels provide a characterization of planetary-scale waves. Retrieved atmospheric infrared dust opacity maps show the formation and evolution of regional dust storms during southern hemisphere summer. Response of the atmospheric thermal structure to the changing dust loading is observed. Maps of water-ice clouds as viewed in the thermal infrared are presented along with seasonal trends of infrared water-ice opacity. Uses of these observations for diagnostic studies of the dynamics of the atmosphere are discussed.

[1]  Michael D. Smith,et al.  Thermal tides and stationary waves on Mars as revealed by Mars Global Surveyor thermal emission spectrometer , 2000 .

[2]  Terry Z. Martin,et al.  Thermal infrared opacity of the Mars atmosphere , 1986 .

[3]  J. Schofield,et al.  Results of the Mars Pathfinder atmospheric structure investigation , 1999 .

[4]  John C. Pearl,et al.  Mars Global Surveyor Thermal Emission Spectrometer (TES) observations of dust opacity during aerobraking and science phasing , 2000 .

[5]  Richard W. Zurek,et al.  The martian dust cycle. , 1992 .

[6]  M. Lemmon,et al.  Opacity of the Martian atmosphere measured by the Imager for Mars Pathfinder , 1999 .

[7]  Duane O. Muhleman,et al.  WATER VAPOR SATURATION AT LOW ALTITUDES AROUND MARS APHELION : A KEY TO MARS CLIMATE ? , 1996 .

[8]  M. Mellon,et al.  Mars Global Surveyor Thermal Emission Spectrometer experiment: Investigation description and surface science results , 2001 .

[9]  G. R. Gladstone,et al.  A new model for Mars atmospheric dust based upon analysis of ultraviolet through infrared observations from Mariner 9, Viking, and Phobos , 1995 .

[10]  R. A. Hanel,et al.  Investigation of the Martian environment by infrared spectroscopy on Mariner 9 , 1972 .

[11]  J. Pollack,et al.  Dynamics of the atmosphere of Mars , 1992 .

[12]  R. J. Reid,et al.  Results from the Mars Pathfinder camera. , 1997, Science.

[13]  R. Clancy,et al.  Monitoring Mars with the Hubble Space Telescope: 1990-1991 Observations , 1994 .

[14]  Robert M. Haberle,et al.  Three‐dimensional numerical simulation of Martian global dust storms , 1995 .

[15]  J. Pearl,et al.  MAPPING MARINER 9 DUST OPACITIES , 1997 .

[16]  J. Bandfield,et al.  Spectral data set factor analysis and end-member recovery: Application to analysis of Martian atmospheric particulates , 2000 .

[17]  R. Todd Clancy,et al.  Hubble Space Telescope observations of the Martian aphelion cloud belt prior to the Pathfinder mission: Seasonal and interannual variations , 1999 .

[18]  J. Bandfield,et al.  Observations of Martian ice clouds by the Mars Global Surveyor Thermal Emission Spectrometer: The first Martian year , 2001 .

[19]  R. Clark,et al.  Results from the Mars Global Surveyor Thermal Emission Spectrometer. , 1998, Science.

[20]  S. Larsen,et al.  The Mars Pathfinder atmospheric structure investigation/meteorology (ASI/MET) experiment. , 1997, Science.

[21]  P. Christensen,et al.  Variations in Martian surface composition and cloud occurrence determined from thermal infrared spectroscopy: Analysis of Viking and Mariner 9 data , 1998 .

[22]  M. Richardson,et al.  New dust opacity mapping from Viking infrared thermal mapper data , 1993 .

[23]  E. C. Slipher.  A photographic history of Mars, 1905-1961. , 1962 .

[24]  Ralph A. Kahn,et al.  Properties of aerosols in the Martian atmosphere, as inferred from Viking lander imaging data , 1977 .

[25]  D. L. Anderson,et al.  Thermal emission spectrometer experiment: Mars Observer mission , 1992 .

[26]  M. J. Wolff,et al.  An intercomparison of ground-based millimeter, MGS TES, and Viking atmospheric temperature measurements: Seasonal and interannual variability of temperatures and dust loading in the global Mars atmosphere , 2000 .

[27]  D. Paige,et al.  Viking era water-ice clouds , 2000 .