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Observations of neutral wind profiles between 115- and 175-km altitude in the dayside auroral ovalLithium trail neutral wind measurements have been made in the morning dayside auroral oval as a function of altitude. During all four experiments the winds displayed a large altitude shear. In the most extreme case the wind at 135-km altitude was toward the south at 210 m/s, and at 185-km altitude toward the northwest at 170 m/s. A one-dimensional numerical solution to the Navier Stokes equation including an initial steady-state wind profile, viscosity, pressure gradient, Lorenz force and the Coriolis force was made in order to study the effect of auroral processes on the neutral atmosphere. Since electric fields and plasma density were measured, the Lorenz force could be modeled with reasonable accuracy. The pressure gradient was determined in an iterative way as a best fit to the observations. Within the limitations of a one-dimensional model the numerical solution is in reasonable agreement with one of the observations, which is applicable to such a modeling, and indicates that both Lorenz forces and pressure gradients due to auroral processes are required to explain the observation.
Document ID
19800055158
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Pereira, E.
(Cornell Univ. Ithaca, NY, United States)
Kelley, M. C.
(Cornell University Ithaca, N.Y., United States)
Rees, D.
(Cornell Univ. Ithaca, NY, United States)
Fuller-Rowell, T. J.
(University College London, United Kingdom)
Mikkelsen, I. S.
(Cornell Univ. Ithaca, NY, United States)
Jorgensen, T. S.
(Danske Meteorologiske Institut Copenhagen, Denmark)
Date Acquired
August 10, 2013
Publication Date
June 1, 1980
Publication Information
Publication: Journal of Geophysical Research
Volume: 85
Subject Category
Geophysics
Accession Number
80A39328
Funding Number(s)
CONTRACT_GRANT: NGR-33-010-161
CONTRACT_GRANT: NSF ATM-77-04518
Distribution Limits
Public
Copyright
Other

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