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A test of convection models for IMF Bz northThe Utah State University Ionospheric Model was run to obtain diurnally reproducible ionospheric densities and temperatures for summer and winter conditions using both distorted two-cell and three-cell convection patterns. Differences due to the different convection patterns manifest themselves in the depth and location of polar holes in the F-region electron density. While the total depth of the model holes is a characteristic of the diurnally reproducible pattern, the features appear and are recognizable within 0.5 h. Langmuir probe data from 41 DE-2 passes, during which the IMF Bz component was northward, have been qualitatively checked against the model predictions. The cross polar cap electron density profiles of a large majority of the passes more closely conform to the distorted two-cell runs for both polarities of the IMF By component. This test can be generalized to rule out proposed convection patterns based on the presence/absence and position of polar electron density holes.
Document ID
19900065703
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Maynard, N. C.
(USAF, Geophysics Laboratory, Hanscom AFB MA, United States)
Sojka, J. J.
(Air Force Geophysics Lab. Hanscom AFB, MA, United States)
Schunk, R. W.
(Utah State University Logan, United States)
Heppner, J. P.
(Air Force Geophysics Lab. Hanscom AFB, MA, United States)
Brace, L. H.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
September 1, 1990
Publication Information
Publication: Planetary and Space Science
Volume: 38
ISSN: 0032-0633
Subject Category
Geophysics
Accession Number
90A52758
Funding Number(s)
PROJECT: AF PROJECT 2311G5
OTHER: F19620-86-C-0109
Distribution Limits
Public
Copyright
Other

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