Abstract

The vertical wave displacement generated by a Martian volcano, at heights comparable with and above the altitude of the topography, is investigated in this paper. An examination is made of the leakage of this displacement into atmospheric heights well above the topography, and consideration is given to two large Martian volcanoes, Olympus Mons and Ascraeus Mons. Viking Orbiter imagery portraying wave clouds in the vicinity of these volcanoes is compared with theoretical results obtained by considering a simple one-layer atmosphere in which the ratio of the stability factor to the square of the atmospheric velocity profile is deemed to be constant at all vertical levels. It is found that a wave plume phenomenon is predicted by this theory, and by comparing with visual observations, information can be deduced as to the atmospheric mean structure of velocity and stability when these cloud formations occur.

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