DOI: 10.1029/2017JE005466
Scopus记录号: 2-s2.0-85049855190
论文题名: MAVEN/IUVS Stellar Occultation Measurements of Mars Atmospheric Structure and Composition
作者: Gröller H. ; Montmessin F. ; Yelle R.V. ; Lefèvre F. ; Forget F. ; Schneider N.M. ; Koskinen T.T. ; Deighan J. ; Jain S.K.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 6 起始页码: 1449
结束页码: 1483
语种: 英语
英文关键词: atmospheric composition and structure
; MAVEN/IUVS stellar occultations
; molecular oxygen
; ozone
; temperature profiles
; waves/tides detection
Scopus关键词: atmospheric structure
; atmospheric tide
; atmospheric wave
; chemical composition
; Mars
; Martian atmosphere
; molecular analysis
; oxygen
; ozone
; satellite mission
; temperature profile
英文摘要: The Imaging UltraViolet Spectrograph (IUVS) instrument of the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission has acquired data on Mars for more than one Martian year. During this time, beginning with March 2015, hundreds of stellar occultations have been observed, in 12 dedicated occultation campaigns, executed on average every 2 to 3 months. The occultations cover the latitudes from 80°S to 75°N and the full range longitude and local times with relatively sparse sampling. From these measurements we retrieve CO2, O2, and O3 number densities as well as temperature profiles in the altitude range from 20 to 160 km, covering 8 orders of magnitude in pressure from ∼2 × 101 to ∼4 × 10−7 Pa. These data constrain the composition and thermal structure of the atmosphere. The O2 mixing ratios retrieved during this study show a high variability from 1.5 × 10−3 to 6 × 10−3; however, the mean value seems to be constant with solar longitude. We detect ozone between 20 and 60 km. In many profiles there is a well-defined peak between 30 and 40 km with a maximum density of 1–2 ×109 cm−3. Examination of the vertical temperature profiles reveals substantial disagreement with models, with observed temperatures both warmer and colder than predicted. Examination of the altitude profiles of density perturbations and their variation with longitude shows structured atmospheric perturbations at altitudes above 100 km that are likely nonmigrating tides. These perturbations are dominated by zonal wave numbers 2 and 3 with amplitudes greater than 45%. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113827
Appears in Collections: 气候减缓与适应
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作者单位: Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, United States; Guyancourt, LATMOS, Université Versailles Saint-Quentin/CNRS, France; Laboratorie de Météorologie Dynamique, Institute Pierre-Simon Laplace, Paris, France; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States
Recommended Citation:
Gröller H.,Montmessin F.,Yelle R.V.,et al. MAVEN/IUVS Stellar Occultation Measurements of Mars Atmospheric Structure and Composition[J]. Journal of Geophysical Research: Planets,2018-01-01,123(6)