Nonmigrating tides in the Martian atmosphere as observed by MAVEN IUVS

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

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)9057-9063
Number of pages7
JournalGeophysical Research Letters
Volume42
Issue number21
DOIs
StatePublished - Nov 16 2015

Keywords

  • CO density
  • MAVEN/IUVS
  • Mars
  • atmospheric tides
  • upper atmosphere

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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    Lo, D. Y., Yelle, R. V., Schneider, N. M., Jain, S. K., Stewart, A. I. F., England, S. L., Deighan, J. I., Stiepen, A., Evans, J. S., Stevens, M. H., Chaffin, M. S., Crismani, M. M. J., McClintock, W. E., Clarke, J. T., Holsclaw, G. M., Lefèvre, F., & Jakosky, B. M. (2015). Nonmigrating tides in the Martian atmosphere as observed by MAVEN IUVS. Geophysical Research Letters, 42(21), 9057-9063. https://doi.org/10.1002/2015GL066268