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AGU: Journal of Geophysical Research, Planets

 

Index Terms

  • Planetology: Solar System Objects: Mars
  • Atmospheric Composition and Structure: Middle atmosphere—energy deposition
  • Ionosphere: Solar radiation and cosmic ray effects
  • Planetology: Solid Surface Planets: Ionospheres
  • Meteorology and Atmospheric Dynamics: Radiative processes
Abstract
Cited By (5)
 

Abstract

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 107, 5063, 5 PP., 2002
doi:10.1029/2001JE001516

Observations of high-altitude CO2 hot bands in Mars by the orbiting Thermal Emission Spectrometer

W. C. Maguire

Laboratory for Extraterrestrial Physics, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

J. C. Pearl

Laboratory for Extraterrestrial Physics, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

M. D. Smith

Laboratory for Extraterrestrial Physics, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

B. J. Conrath

Center for Radiophysics and Space Research, Cornell University, Ithaca, New York, USA

A. A. Kutepov

Max Planck Institute for Extraterrestrial Physics, Garching, Germany

M. S. Kaelberer

Emergent, Inc., Lanham, Maryland, USA

E. Winter

Emergent, Inc., Lanham, Maryland, USA

P. R. Christensen

Department of Geology, Arizona State University, Tempe, Arizona, USA

We present limb spectral measurements of the Martian atmosphere for four seasonal periods produced from data acquired by the Mars Global Surveyor/Thermal Emission Spectrometer. Between the altitudes of approximately 50 and 90 km, nonlocal thermodynamic equilibrium (non-LTE) emission from CO2 hot bands is observed at 10 μm. The centroids of these emissions vary in latitude and height with season, and their emission regions extend approximately 120° in latitude. The emission is considerably stronger in the southern summer/northern winter season than in the corresponding northern summer/southern winter season due to large solar flux variations resulting from the eccentricity of the Martian orbit. Modeling of this emission explains its observed altitude, solar zenith angle, and seasonal dependence.

Published 20 September 2002.

Citation: Maguire, W. C., J. C. Pearl, M. D. Smith, B. J. Conrath, A. A. Kutepov, M. S. Kaelberer, E. Winter, and P. R. Christensen (2002), Observations of high-altitude CO2 hot bands in Mars by the orbiting Thermal Emission Spectrometer, J. Geophys. Res., 107(E9), 5063, doi:10.1029/2001JE001516.

Cited By

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