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Martian atmospheric tides revealed from MAVEN/IUVS and MRO/MCS Observations
  • +2
  • Chengyun Yang,
  • Tao Li,
  • Mengzhen Yuan,
  • Zhaopeng Wu,
  • Xin Fang
Chengyun Yang
University of Science and Technology of China
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Tao Li
University of Science and Technology of China

Corresponding Author:[email protected]

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Mengzhen Yuan
University of Science and Technology of China
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Zhaopeng Wu
Institute of Geology and Geophysics, Chinese Academy of Sciences
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Xin Fang
University of Science and Technology of China
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Abstract

Utilizing atmospheric temperature observed from Mars Years 33 to 36 by the Imaging Ultraviolet Spectrograph (IUVS) onboard the Mars Atmosphere and Volatile Evolution (MAVEN) and Mars Climate Sounder (MCS) onboard Mars Reconnaissance Orbiter (MRO), we derive the diurnal and semidiurnal thermal tides from 30 to 160 km. Vertical phase velocities of the migrating tides indicate their upward propagation above 100 km during the dust season (solar longitude, Ls 240° to 300°). During the non-dust season (Ls 30° to 150°), the diurnal eastward wavenumber 2 (DE2) and wavenumber 3 (DE3) tides can propagate upward from the lower atmosphere to ~140 km. The seasonal variation of DE2 and DE3 amplitudes in the thermosphere corresponds well to their counterparts in the lower atmosphere, primarily controlled by their Hough (1,1) modes. The upward propagation of these tides could potentially impact the vertical coupling between the Martian lower and upper atmosphere.
13 Apr 2024Submitted to ESS Open Archive
16 Apr 2024Published in ESS Open Archive