A calculation of ionospheric currents due to semidiurnal antisymmetric tides

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Journal of Geophysical Research; (USA)

DOI:https://doi.org/10.1029/JA094iA02p01525· OSTI ID:6050217

Stening, R J ^[1]

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1. Univ. of New South Wales, Kensington (Australia)

The fully developed equivalent circuit method is used to calculate the ionospheric electric current flow due to the (2,3) and (2,5) tidal modes. The (2,5) mode currents are of negligibly small amplitude. the (2,3) current pattern has meridional currents in the same direction at a given local time in both north and south hemispheres. There is also sometimes a minimum in the zonal current around 10{degree} dip latitude and the equatorial electrojet pattern may be different in different longitude zones. These features may be possible explanations of (1) the meridional current pattern observed at Saint-Santin, (2) current flows on abnormal quiet days (AQDs), (3) the reverse equatorial electrojet, (4) the seasonal phase anomaly in the lunar geomagnetic tide, and (5) the invasion of one hemisphere's current pattern by that from the opposite hemisphere. The recent detection of antisymmetric semidiurnal winds just below the dynamo region further demonstrates the importance of these modes.

• OSTI ID: 6050217
• Journal Information: Journal of Geophysical Research; (USA), Journal Name: Journal of Geophysical Research; (USA) Vol. 94:A2; ISSN JGREA; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
CALCULATION METHODS
CURRENTS
EARTH ATMOSPHERE
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTROJETS
GEOGRAPHICAL VARIATIONS
GEOMAGNETIC FIELD
IONOSPHERE
LATITUDE EFFECT
MAGNETIC FIELDS
PHYSICAL PROPERTIES
PLANETARY IONOSPHERES
TIDE
VARIATIONS
WIND