Atmospheric and surface temperatures and airborne dust amounts during late southern summer from Mariner 9 IRIS data

Details Atmospheric and surface temperatures and airborne dust amounts during late southern summer from Mariner 9 IRIS data Atmospheric and surface temperatures and airborne dust amounts during late southern summer from Mariner 9 IRIS data

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992msat.work..128s&link_type=abstract

In Lunar and Planetary Inst., Workshop on the Martian Surface and Atmosphere Through Time p 128-129 (SEE N92-28988 19-91)

Computer Science

1

Atmospheric Temperature, Dust, Emission Spectra, Infrared Interferometers, Infrared Spectrometers, Mars Atmosphere, Optical Thickness, Surface Temperature, Dust Storms, Mariner 9 Space Probe, Mars Environment, Mars Surface, Thermal Emission, Vertical Distribution

Scientific paper

The temperature structure and dust loading of the Martian atmosphere are investigated using thermal emission spectra recorded in 1972 by the Mariner 9 infrared interferometer spectrometer (IRIS). The analysis focuses on a subset of data consisting of approximately 2400 spectra obtained near the end of the southern summer season (Ls equal to 343 deg to 348 deg), after the global dust storm had largely abated and airborne dust amounts were subsiding to background values. Simultaneous retrieval of the vertical distribution of both atmospheric temperature and dust optical depth is accomplished through an iterative procedure which is performed on each individual spectrum. The atmospheric transmittances are calculated using a Voigt quasi-random band model, which includes absorption by CO2 and dust, but neglects the effects of multiple scattering. Vertical profiles of temperature and dust optical depth are obtained using modified algorithms. These profiles are used to construct global maps of temperature and dust optical depth as functions of latitude (+/- 90 deg), altitude (approximately 0-50 km), and local time of day.

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