Magnetic declination control of the equatorial F region dynamo electric field development and spread F

Journal Article · Tue Dec 01 00:00:00 EST 1981 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA086iA13p11443· OSTI ID:5289108

Abdu, M A; Bittencourt, J A; Batista, I S

We have carried out a comparative study of the evening prereversal enhancements in the equatorial F region vertical ionization drift velocities (V/sub z/) over Fortaleza (4 /sup 0/S, 38 /sup 0/W), Brazil, and Jicamarca (12 /sup 0/S, 77 /sup 0/W), Peru, two magnetic equatiorial stations in the American zone. The results show profound dissimilarities in the seasonal trends in the times and widths of the V/sub z/ prereversal peak, which reflect in the spread F characteristics as well, at the two stations. The dissimilarities are shown to be arising mainly from the difference in the magnetic field declination angles that causes differences in the conjugate E region sunset durations and, hence, in the F region polarization electric field development rates at the two stations.

• Research Organization: Instituto de Pesquisas Espaciais, Conselho Nacional de Desenvolvimento Cinetifico e Tecnologico-12.200, Sao Jose dos Campos, Sao Paulo, Brazil
• OSTI ID: 5289108
• Journal Information: J. Geophys. Res.; (United States), Vol. 86:A13
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
F REGION
ELECTRIC FIELDS
INCLINATION
SPREAD F
COMPARATIVE EVALUATIONS
EQUATOR
GEOMAGNETIC FIELD
MAGNETIC FIELD REVERSAL
EARTH ATMOSPHERE
IONOSPHERE
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FIELDS
PLANETARY IONOSPHERES
640201* - Atmospheric Physics- Auroral
Ionospheric
& Magetospheric Phenomena