Solar and magnetic declination control on the electrojet and distributed currents in the ionosphere over Jicamarca

Journal Article · Mon Feb 01 00:00:00 EST 1988 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA093iA02p01017· OSTI ID:5268668

Muralikrishna, P; Abdu, M A

Daytime variation in the average east-west drift velocity of electrons in the height range of 95--110 km over Jicamarca (0.9 /sup 0/N, dip latitude) is compared with variation in the horizontal component of the geomagnetic field at the closeby Huancayo station (0.6 /sup 0/N, dip latitude). On magnetically quiet days, the ratio of ..delta..H to the electron drift velocity shows a local time variation asymmetric with respect to local noon, although one would expect a symmetric cos chi (where chi is the solar zenith angle) type of variation for the same, if, indeed, ..delta..H arises solely from the electrojet region in which the electron drift velocities are measured. The observed asymmetry indicates significant contribution of distributed currents from height regions above the electrojet in the integrated current represented by ..delta..H. Further, the observed seasonal variation in the degree of the asymmetry seems to point out the importance of magnetic and solar declination angles in controlling the relative contributions of the distributed (and electrojet) currents to the magnitude of the observed ..delta..H values. copyright American Geophysical Union 1988

• Research Organization: Instituto de Pesquisas Espaciais, Sa-tildeo Jose dos Campos, Sa-tildeo Paulo, Brasil
• OSTI ID: 5268668
• Journal Information: J. Geophys. Res.; (United States), Vol. 93:A2
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
IONOSPHERE
CHARGE DISTRIBUTION
ELECTROJETS
ELECTRON DRIFT
DAILY VARIATIONS
DATA ANALYSIS
DISTRIBUTION FUNCTIONS
GEOMAGNETIC FIELD
SEASONAL VARIATIONS
VELOCITY
CURRENTS
EARTH ATMOSPHERE
ELECTRIC CURRENTS
FUNCTIONS
MAGNETIC FIELDS
PLANETARY IONOSPHERES
VARIATIONS
640201* - Atmospheric Physics- Auroral
Ionospheric
& Magetospheric Phenomena