Retrieval of CO2 and N2 in the Martian thermosphere using dayglow observations by IUVS on MAVEN

被引:43
作者
Evans, J. S. [1 ]
Stevens, M. H. [2 ]
Lumpe, J. D. [1 ]
Schneider, N. M. [3 ]
Stewart, A. I. F. [3 ]
Deighan, J. [3 ]
Jain, S. K. [3 ]
Chaffin, M. S. [3 ]
Crismani, M. [3 ]
Stiepen, A. [3 ]
McClintock, W. E. [3 ]
Holsclaw, G. M. [3 ]
Lefevre, F. [4 ]
Lo, D. Y. [5 ]
Clarke, J. T. [6 ]
Eparvier, F. G. [3 ]
Thiemann, E. M. B. [3 ]
Chamberlin, P. C. [7 ]
Bougher, S. W. [8 ]
Bell, J. M. [9 ]
Jakosky, B. M. [3 ]
机构
[1] Computat Phys Inc, Springfield, VA 22151 USA
[2] Naval Res Lab, Washington, DC 20375 USA
[3] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA
[4] CNRS, LATMOS, Paris, France
[5] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA
[6] Boston Univ, Ctr Space Phys, Boston, MA 02215 USA
[7] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[8] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA
[9] NIA, Hampton, VA USA
关键词
ULTRAVIOLET SPECTROMETER EXPERIMENT; UPPER-ATMOSPHERE; CROSS-SECTIONS; MARINER; 6; MARS; EMISSIONS; AIRGLOW; IMPACT; SPECTROSCOPY; TRANSITIONS;
D O I
10.1002/2015GL065489
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
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.
引用
收藏
页码:9040 / 9049
页数:10
相关论文
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