Non-Migrating Tides in the Martian Atmosphere as Observed by MAVEN IUVS

Daniel Y. Lo (1) , Roger V. Yelle (1) , Nicholas M. Schneider (2) , Sonal K. Jain (2) , A. Ian F. Stewart (2) , Scott L. England (3) , Justin I. Deighan (2) , Arnaud Stiepen (2) , J. Scott Evans , Michael H. Stevens (4) , Michael S. Chaffin (2) , Matteo M. J. Crismani (2) , William E. Mcclintock (2) , John T. Clarke (5) , Gregory M. Holsclaw (2) , Franck Lefèvre (6) , Bruce M. Jakosky (2)

1 LPL - Lunar and Planetary Laboratory [Tucson]
2 LASP - Laboratory for Atmospheric and Space Physics [Boulder]
3 SSL - Space Sciences Laboratory [Berkeley]
4 NRL - Naval Research Laboratory
5 CSP - Center for Space Physics [Boston]
6 PLANETO - LATMOS

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. 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.

Keywords: upper atmosphere; CO2 density; atmospheric tides; MAVEN/IUVS; Mars

Domains: Physics [physics]; Physics [physics]; Atmospheric and Oceanic Physics [physics.ao-ph]; Sciences of the Universe [physics]; Earth Sciences; Geophysics [physics.geo-ph]

Daniel Y. Lo, Roger V. Yelle, Nicholas M. Schneider, Sonal K. Jain, A. Ian F. Stewart, et al.. Non-Migrating Tides in the Martian Atmosphere as Observed by MAVEN IUVS. Geophysical Research Letters, 2015, 42 (21), pp.9057-9063. ⟨10.1002/2015GL066268⟩. ⟨insu-01238446⟩