A global view of gravity waves in the Martian atmosphere inferred from a high-resolution general circulation model

Takeshi Kuroda, Alexander S. Medvedev, Erdal Yiʇit, Paul Hartogh

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Global characteristics of the small-scale gravity wave (GW) field in the Martian atmosphere obtained from a high-resolution general circulation model (GCM) are presented for the first time. The simulated GW-induced temperature variances are in a good agreement with available radio occultation data in the lower atmosphere between 10 and 30 km. The model reveals a latitudinal asymmetry with stronger wave generation in the winter hemisphere and two distinctive sources of GWs: mountainous regions and the meandering winter polar jet. Orographic GWs are filtered, while propagating upward, and the mesosphere is primarily dominated by harmonics with faster horizontal phase velocities. Wave fluxes are directed mainly against the local wind. GW dissipation in the upper mesosphere generates body forces of tens of m s-1 per Martian solar day (sol-1), which tend to close the simulated jets. The results represent a realistic surrogate for missing observations, which can be used for constraining GW parameterizations and validating GCM simulations.

Original languageEnglish
Pages (from-to)9213-9222
Number of pages10
JournalGeophysical Research Letters
Volume42
Issue number21
DOIs
Publication statusPublished - 2015 Nov 16

Keywords

  • Mars atmosphere
  • general circulation model
  • gravity waves
  • high-resolution modeling

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'A global view of gravity waves in the Martian atmosphere inferred from a high-resolution general circulation model'. Together they form a unique fingerprint.

  • Cite this