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dc.contributor.advisor Cloutier, Paul A.
dc.creatorMcGary, John Edward
dc.date.accessioned 2009-06-03T23:53:50Z
dc.date.available 2009-06-03T23:53:50Z
dc.date.issued 1988
dc.identifier.urihttp://hdl.handle.net/1911/16168
dc.description.abstract The Pioneer Venus observations show a peak in the O$\sb2\sp+$ concentration at $\sim$170 km altitude in the dayside ionosphere of Venus. In this thesis, the 2-dimensional MHD equations are solved in a self-consistent manner, as an extension to the 1-dimensional model by Cloutier et al. (1987), to present a global model of the Venus dayside ionosphere for solar zenith angles (SZA) $\leq$ 60$\sp\circ$. The model describes, by calculating vertical profiles at different SZA, ion densities, magnetic field magnitudes, and ion velocities. The model shows that the O$\sb2\sp+$ peak, at $\sim$170 km altitude, occurs throughout the dayside ionosphere as observed by the Orbiter Ion Mass Spectrometer (OIMS). The velocity field, which affects the ion distributions, is mainly tangential near the ionopause and radial for altitudes below 200 km. The downward flow accelerates, near 170 km altitude, due to collisional interactions with the neutral atmosphere, and removes the O$\sb2\sp+$ densities to lower altitudes, thus, producing the bump observed in the altitude profile.
dc.format.extent 108 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectAtmospheric sciences
Astronomy
Astrophysics
dc.title A two-dimensional model of the Venus ionosphere
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Physics
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy
dc.identifier.citation McGary, John Edward. "A two-dimensional model of the Venus ionosphere." (1988) PhD diss., Rice University. http://hdl.handle.net/1911/16168.


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