期刊
ICARUS
卷 215, 期 2, 页码 522-525出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.icarus.2011.07.025
关键词
Mars; Atmospheres, Structure; Mars, Atmosphere; Aeronomy
资金
- French National Research Agency (ANR) [NT09_432495]
- NASA [1214866]
- CNRS
- CNES
Absorption of interplanetary Lyman-alpha emission by Mars' nightside lower thermosphere was observed by Mars Express Spectrometer for Investigation of Characteristics of the Atmosphere of Mars (SPICAM), and is analyzed to derive the CO2 density at 110 km during a martian year. The observed density seasonal variability is consistent with recent observations obtained by stellar occultations, proving that this method, though not as accurate as stellar occultations could be used complementary to them to characterize large variations of thermospheric density on Mars and provide a better spatial coverage by Lyman-alpha imagery. (C) 2011 Elsevier Inc. All rights reserved.
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