Latitudinal gradient in the plasma bubble zonal velocities as observed by scanning 630-nm airglow measurements

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JA095iA06p08253· OSTI ID:5310889

Sobral, J H.A.; Abdu, M A ^[1]

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1. Instituto de Pesquisas Espaciais, Sao Paulo (Brazil)

Equatorial ionospheric plasma bubble zonal velocities were measured using two 630-nm scanning photometers. Simultaneous scanning measurements were made in two east-west planes that were tilted 30{degree} northward and southward of the vertical. The results of measurements carried out during 5 days covering the summer equinoctial period of 1988, presented here, show evidence of marked latitudinal gradient in the bubble zonal velocities, the velocities decreasing with increasing latitude over out low-latitude observing site, Cachoeira Paulista ({minus}28{degree} dip). The authors suggest that this velocity gradient is consistent with expectations at solar minimum, when the measurements may be associated with the region above the maximum in the eastward plasma velocity height profile.

• OSTI ID: 5310889
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 95:A6; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AIRGLOW
BUBBLES
DATA
EARTH ATMOSPHERE
ELECTRIC FIELDS
ELECTRON DENSITY
F REGION
GEOGRAPHICAL VARIATIONS
INFORMATION
IONOSPHERE
LATITUDE EFFECT
MEASURING INSTRUMENTS
PHOTOMETERS
PLANETARY IONOSPHERES
PLASMA DENSITY
PLASMA DRIFT
VARIATIONS
VELOCITY
WIND