期刊
GEOPHYSICAL RESEARCH LETTERS
卷 42, 期 21, 页码 9040-9049出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL065489
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资金
- NASA
- University of Colorado Laboratory for Atmospheric and Space Physics
- Belgian American Educational Foundation
- Rotary District
We present direct number density retrievals of carbon dioxide (CO2) and molecular nitrogen (N-2) for the upper atmosphere of Mars using limb scan observations during October and November 2014 by the Imaging Ultraviolet Spectrograph on board NASA's Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft. We use retrieved CO2 densities to derive temperature variability between 170 and 220 km. Analysis of the data shows (1) low-mid latitude northern hemisphere CO2 densities at 170km vary by a factor of about 2.5, (2) on average, the N-2/CO2 increases from 0.042 +/- 0.017 at 130 km to 0.12 +/- 0.06 at 200 km, and (3) the mean upper atmospheric temperature is 324 +/- 22 K for local times near 14:00.
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