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

W. C. Maguire; J. C. Pearl; M. D. Smith; B. J. Conrath; A. A. Kutepov; M. S. Kaelberer; E. Winter; Philip Christensen

doi:10.1029/2001je001516

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

W. C. Maguire, J. C. Pearl, M. D. Smith, B. J. Conrath, A. A. Kutepov, M. S. Kaelberer, E. Winter, Philip Christensen

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	1-1-1-5
Journal	Journal of Geophysical Research: Planets
Volume	107
Issue number	9
DOIs	https://doi.org/10.1029/2001je001516
State	Published - Sep 25 2002

Keywords

Carbon dioxide
Hot band
MGS/TES
Non-LTE
Seasons limb

ASJC Scopus subject areas

Geochemistry and Petrology
Geophysics
Earth and Planetary Sciences (miscellaneous)
Space and Planetary Science
Atmospheric Science
Astronomy and Astrophysics
Oceanography

Access to Document

10.1029/2001je001516

Cite this

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

abstract = "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.",

keywords = "Carbon dioxide, Hot band, MGS/TES, Non-LTE, Seasons limb",

author = "Maguire, {W. C.} and Pearl, {J. C.} and Smith, {M. D.} and Conrath, {B. J.} and Kutepov, {A. A.} and Kaelberer, {M. S.} and E. Winter and Philip Christensen",

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TY - JOUR

T1 - Observations of high-altitude CO2 hot bands in Mars by the orbiting Thermal Emission Spectrometer

AU - Maguire, W. C.

AU - Pearl, J. C.

AU - Smith, M. D.

AU - Conrath, B. J.

AU - Kutepov, A. A.

AU - Kaelberer, M. S.

AU - Winter, E.

AU - Christensen, Philip

PY - 2002/9/25

Y1 - 2002/9/25

N2 - 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.

AB - 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.

KW - Carbon dioxide

KW - Hot band

KW - MGS/TES

KW - Non-LTE

KW - Seasons limb

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