High-altitude gravity waves in the Martian thermosphere observed by MAVEN/NGIMS and modeled by a gravity wave scheme

Erdal Yiğit, Scott L. England, Guiping Liu, Alexander S. Medvedev, Paul R. Mahaffy, Takeshi Kuroda, Bruce M. Jakosky

研究成果: Article査読

56 被引用数 (Scopus)

抄録

First high-altitude observations of gravity wave (GW)-induced CO2density perturbations in the Martian thermosphere retrieved from NASA's Neutral Gas Ion Mass Spectrometer (NGIMS) instrument on board the Mars Atmosphere Volatile EvolutioN (MAVEN) satellite are presented and interpreted using the extended GW parameterization of Yiʇit et al. (2008) and the Mars Climate Database as an input. Observed relative density perturbations between 180 and 220 km of 20-40% demonstrate appreciable local time, latitude, and altitude variations. Modeling for the spatiotemporal conditions of the MAVEN observations suggests that GWs can directly propagate from the lower atmosphere to the thermosphere, produce appreciable dynamical effects, and likely contribute to the observed fluctuations. Modeled effects are somewhat smaller than the observed, but their highly variable nature is in qualitative agreement with observations. Possible reasons for discrepancies between modeling and measurements are discussed.

本文言語English
ページ(範囲)8993-9000
ページ数8
ジャーナルGeophysical Research Letters
42
21
DOI
出版ステータスPublished - 2015 11月 16

ASJC Scopus subject areas

  • 地球物理学
  • 地球惑星科学(全般)

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