Mathematics – Logic
Scientific paper
Feb 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jgr...102.2039h&link_type=abstract
Journal of Geophysical Research, Volume 102, Issue A2, p. 2039-2046
Mathematics
Logic
13
Ionosphere: Electric Fields, Ionosphere: Equatorial Ionosphere, Ionosphere: Ionospheric Irregularities, Ionosphere: Plasma Temperature And Density
Scientific paper
Ion velocities associated with nighttime equatorial plasma depletions near 800 km altitude have been investigated utilizing data from the Defense Meteorological Satellite Program. Observations of upward ion drifts exceeding 800ms-1, within the depleted regions, are shown to have a strong dependence on solar zenith angle. Given the existence of bubble plasma, the probability of observing large upward drifts is as high as 40% just after sunset, when the solar zenith angle is 110°, but it decreases rapidly, falling below 5% for solar zenith angles above 140°. It is suggested that irregularity formation in the bottom-side F region during a period of postsunset enhanced electric fields will cause magnetic flux tubes of depleted plasma to accelerate upward, reaching a velocity maximum at apex heights corresponding to the peak in the flux-tube-integrated conductivity of the background plasma. In the presence of a postsunset enhanced electric field, this peak may exist at apex heights above 500 km.
Coley William R.
Hanson William B.
Heelis Roderick A.
Urquhart Andrew L.
No associations
LandOfFree
Fast equatorial bubbles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Fast equatorial bubbles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fast equatorial bubbles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1604783