Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa53b1375y&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SA53B-1375
Physics
2415 Equatorial Ionosphere, 2439 Ionospheric Irregularities, 2481 Topside Ionosphere, 2494 Instruments And Techniques
Scientific paper
Plasma density enhancements, or plasma blobs and radar backscatter plumes in the nighttime equatorial F region, both of which are intriguing phenomena associated with equatorial spread F (ESF), have been concurrently observed for the first time on March 8, 2004 along the same magnetic meridian. The observational results are the strong evidences of a close relationship between plasma bubbles and blobs in the equatorial ionosphere. Plasma blobs were detected by ROCSAT-1 at a dip latitude of ~9°N, while the 47- MHz Equatorial Atmosphere Radar (EAR) in Sumatra, Indonesia observed the backscatter plume which is associated with plasma density depletions, or plasma bubbles at a dip latitude of as high as 13°S. The plume were extended upward with large Doppler velocity away from the radar late in the pre-midnight sector in association with the appearance of the plasma blobs. Localized eastward polarization electric fields developed within the bubbles should play an important role in the phenomena. The fact that the plasma blobs were observed at the lower dip latitude (~9°N) than the radar plume (~13°S) implies asymmetry of equatorial ionization anomaly (EIA) crests due to a southward transequatorial neutral wind. One explanation is the coupling effect between the equatorial F region and the low-latitude E region in which sporadic-E layers may modulate the nighttime conductivity to enhance electric fields in the equatorial F region.
Fukao Shoichiro
Su Shangguo
Yokoyama Tadashi
No associations
LandOfFree
Plasma Blobs and Irregularities Concurrently Observed by ROCSAT-1 and Equatorial Atmosphere Radar 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 Plasma Blobs and Irregularities Concurrently Observed by ROCSAT-1 and Equatorial Atmosphere Radar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plasma Blobs and Irregularities Concurrently Observed by ROCSAT-1 and Equatorial Atmosphere Radar will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-966515