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Simultaneous Observations of Atmospheric Tides from Combined in Situ and Remote Observations at Mars from the MAVEN SpacecraftWe report the observations of longitudinal variations in the Martian thermosphere associated with nonmigrating tides. Using the Neutral Gas Ion Mass Spectrometer (NGIMS) and the Imaging Ultraviolet Spectrograph (IUVS) on NASA's Mars Atmosphere and Volatile EvolutioN Mission (MAVEN) spacecraft, this study presents the first combined analysis of in situ and remote observations of atmospheric tides at Mars for overlapping volumes, local times, and overlapping date ranges. From the IUVS observations, we determine the altitude and latitudinal variation of the amplitude of the nonmigrating tidal signatures, which is combined with the NGIMS, providing information on the compositional impact of these waves. Both the observations of airglow from IUVS and the CO2 density observations from NGIMS reveal a strong wave number 2 signature in a fixed local time frame. The IUVS observations reveal a strong latitudinal dependence in the amplitude of the wave number 2 signature. Combining this with the accurate CO2 density observations from NGIMS, this would suggest that the CO2 density variation is as high as 27% at 0-10 deg latitude. The IUVS observations reveal little altitudinal dependence in the amplitude of the wave number 2 signature, varying by only 20% from 160 to 200 km. Observations of five different species with NGIMS show that the amplitude of the wave number 2 signature varies in proportion to the inverse of the species scale height, giving rise to variation in composition as a function of longitude. The analysis and discussion here provide a roadmap for further analysis as additional coincident data from these two instruments become available.
Document ID
20170003170
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
England, Scott L. (California Univ. Berkeley, CA, United States)
Liu, Guiping (California Univ. Berkeley, CA, United States)
Withers, Paul (Boston Univ. Boston, MA, United States)
Yigit, Erdal (George Mason Univ. Fairfax, VA, United States)
Lo, Daniel (Arizona Univ. Tucson, AZ, United States)
Jain, Sonal (Colorado Univ. Boulder, CO, United States)
Schneider, Nicholas M. (Colorado Univ. Boulder, CO, United States)
Deighan, Justin (Colorado Univ. Boulder, CO, United States)
McClintock, William E. (Colorado Univ. Boulder, CO, United States)
Mahaffy, Paul R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Elrod, Meredith (Maryland Univ. College Park, MD, United States)
Benna, Mehdi (Maryland Univ. Baltimore County Baltimore, MD, United States)
Jakosky, Bruce M. (Colorado Univ. Boulder, CO, United States)
Date Acquired
April 7, 2017
Publication Date
April 8, 2016
Publication Information
Publication: Journal of Geophysical Research: Planets
Volume: 121
Issue: 4
ISSN: 2169-9097
Subject Category
Lunar and Planetary Science and Exploration
Report/Patent Number
GSFC-E-DAA-TN40336
Funding Number(s)
CONTRACT_GRANT: NNX13AO36G
CONTRACT_GRANT: NNX13AO35G
CONTRACT_GRANT: NNG06EO90A
Distribution Limits
Public
Copyright
Other
Keywords
atmospheric tides
o/co2
mars