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F layer positive response to a geomagnetic storm - June 1972A circulation model of neutral thermosphere-ionosphere coupling is used to interpret in situ spacecraft measurements taken during a topside midlatitude ionospheric storm. The data are measurements of electron density taken along the circular polar orbit of Ariel 4 at 550 km during the geomagnetically disturbed period June 17-18, 1972. It is inferred that collisional momentum transfer from the disturbed neutral thermosphere to the ionosphere was the dominant midday process generating the positive F-layer storm phase in the summer hemisphere. In the winter hemisphere the positive storm phase drifted poleward in the apparent response to magnetospheric E x B drifts. A summer F-layer positive phase developed at the sudden commencement and again during the geomagnetic main phase; a winter F-layer positive phase developed only during the geomagnetic main phase. The observed seasonal differences in both the onsets and the magnitudes of the positive phases are attributed to the interhemispheric asymmetry in thermospheric dynamics.
Document ID
19800030845
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Miller, N. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Grebowsky, J. M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mayr, H. G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Harris, I.
(NASA Goddard Space Flight Center Laboratory for Planetary Atmospheres, Greenbelt, Md., United States)
Tulunay, Y. K.
(Middle East Technical University Ankara, Turkey)
Date Acquired
August 10, 2013
Publication Date
November 1, 1979
Publication Information
Publication: Journal of Geophysical Research
Volume: 84
Subject Category
Geophysics
Accession Number
80A15015
Distribution Limits
Public
Copyright
Other

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