Spread-F and ionization anomaly belt

Alex, S. ; Koparkar, P. V. ; Rastogi, R. G. (1989) Spread-F and ionization anomaly belt Journal of Atmospheric and Terrestrial Physics, 51 (5). pp. 371-379. ISSN 0021-9169

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0021-9169(89)90119-0


The present investigation attempts to bring out the dynamics of the F-region at magnetic equatorial and low latitudes in the American zone. Data are examined for two sets of nights, one with strong range-type spread at Huancayo another with complete absence of spread-F. A prominent bulge of the F-region was observed within and below a latitude 10°N in the evening hours of the spread-F nights. Contours of electron distribution during post-sunset hours at the equatorial latitude, Huancayo (Dip 2°N); low latitude, Talara (dip 13°N); and a location near the anomaly crest location, Panama (dip 38°N), indicated a much steeper gradient in electron density at fixed heights on spread-F nights compared to a rather low gradient on the nonspread-F nights. Enhanced concentration of electrons at the anomaly crest location Panama, and a lower density at the equatorial location Huancayo, were observed on spread-F present nights. This is attributed to the phenomena of an evening plasma fountain in operation at equatorial latitudes on spread-F nights.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:45893
Deposited On:29 Jun 2011 06:52
Last Modified:29 Jun 2011 06:52

Repository Staff Only: item control page