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Wave properties near the subsolar magnetopause - Pc 3-4 energy coupling for northward interplanetary magnetic fieldStrong slow mode waves in the Pc 3-4 frequency range are found in the magnetosheath close to the magnetopause. We have studied these waves at one of the ISEE subsolar magnetopause crossings using the magnetic field, electric field, and plasma measurements. We use the pressure balance at the magnetopause to calibrate the Fast Plasma Experiment data versus the magnetometer data. When we perform such a calibration and renormalization, we find that the slow mode structures are not in pressure balance and small scale fluctuations in the total pressure still remain in the Pc 3-4 range. Energy in the total pressure fluctuations can be transmitted through the magnetopause by boundary motions. The Poynting flux calculated from the electric and magnetic field measurements suggests that a net Poynting flux is transmitted into the magnetopause. The two independent measurements show a similar energy transmission coefficient. The transmitted energy flux is about 18 percent of the magnetic energy flux of the waves in the magnetosheath. Part of this transmitted energy is lost in the sheath transition layer before it enters the closed field line region. The waves reaching the boundary layer decay rapidly. Little wave power is transmitted into the magnetosphere.
Document ID
19930039184
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Song, P.
(California Univ. Los Angeles; High Altitude Observatory, Boulder, CO, United States)
Russell, C. T.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Strangeway, R. J.
(California Univ. Los Angeles, United States)
Wygant, J. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cattell, C. A.
(California Univ. Berkeley, United States)
Fitzenreiter, R. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Anderson, R. R.
(Iowa Univ. Iowa City, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Journal of Geophysical Research
Volume: 98
Issue: A1
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
93A23181
Funding Number(s)
CONTRACT_GRANT: NAG5-375
CONTRACT_GRANT: NAG5-1093
CONTRACT_GRANT: NAG5-1067
Distribution Limits
Public
Copyright
Other

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