Nonmigrating tides in the Martian atmosphere as observed by MAVEN IUVS

Atmospheric tides; CO2 density; Mars; MAVEN/IUVS; Upper atmosphere; Carbon dioxide; Tides; Atmospheric tide; Density variations; Longitudinal variations; Martian atmospheres; Nonmigrating tides; Volatile evolution

Abstract :

[en] Using the Mars Atmospheric and Volatile EvolutioN mission (MAVEN) Imaging Ultraviolet Spectrograph (IUVS), we found periodic longitudinal variations in CO2 density in the Martian atmosphere. These density variations are derived from observations of the CO2+ (B2Σ+→X2Π) emission from limb scans in the 100-190 km altitude range. The variations exhibit significant structure with longitudinal wave numbers 1, 2, and 3 in an effectively constant local solar time frame, and we attribute this structure to nonmigrating tides. The wave-2 component is dominated by the diurnal eastward moving DE1 tide at the equator and the semidiurnal stationary S0 tide at the midlatitudes. Wave-3 is dominated by the diurnal eastward moving DE2 tide, with possibly the semidiurnal eastward moving SE1 tide causing an amplitude increase at the midlatitudes. Structure in the wave-1 component can be explained by the semidiurnal westward moving SW1 tide. ©2015. American Geophysical Union.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Lo, D. Y.; Lunar and Planetary Laboratory University of Arizona Tucson, Arizona USA

Yelle, R. V.; Lunar and Planetary Laboratory University of Arizona Tucson, Arizona USA

Schneider, N. M.; Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder, Colorado USA

Jain, S. K.; Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder, Colorado USA

Stewart, A. I. F.; Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder, Colorado USA

England, S. L.; Space Sciences Laboratory University of California Berkeley, California USA

Deighan, J. I.; Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder, Colorado USA

Stiepen, Arnaud ; Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Evans, J. S.; Computational Physics, Inc. Springfield, Virginia USA

Stevens, M. H.; Naval Research Laboratory Washington, District of Columbia USA

More authors (7 more)

Language :

English

Title :

Nonmigrating tides in the Martian atmosphere as observed by MAVEN IUVS

Publication date :

2015

Journal title :

Geophysical Research Letters

ISSN :

0094-8276

eISSN :

1944-8007

Publisher :

Blackwell Publishing Ltd

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 11 January 2016

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