On the role of vertical electron density gradients in the generation of type II irregularities associated with blanketing ES (ESb) during counter equatorial electrojet events: A case study
Article first published online: 22 MAY 2004
Copyright 2004 by the American Geophysical Union.
Volume 39, Issue 3, June 2004
How to Cite
2004), On the role of vertical electron density gradients in the generation of type II irregularities associated with blanketing ES (ESb) during counter equatorial electrojet events: A case study, Radio Sci., 39, RS3007, doi:10.1029/2002RS002725., , , , , and (
- Issue published online: 22 MAY 2004
- Article first published online: 22 MAY 2004
- Manuscript Accepted: 2 APR 2004
- Manuscript Revised: 12 DEC 2003
- Manuscript Received: 27 MAY 2002
- blanketing ES;
- counter electrojet;
 The characteristics of different types of Sporadic E (ES) layers and the associated plasma density irregularities over the magnetic equator have been studied in a campaign mode using VHF backscatter radar, digital ionosonde, and ground magnetometer data from Trivandrum (dip latitude 0.5°N, geographic latitude 8.5°N, geographic longitude 77°E), India. The presence of blanketing type ES (ESb) in the ionograms with varying intensity and duration were observed in association with afternoon Counter Equatorial Electrojet (CEEJ) events. ESb was associated with intense backscatter returns and with either very low zonal electric field and/or with distortions present in the altitude profile of the drift velocity of the type II irregularities. The results of the coordinated study indicate the possible role of vertical electron density gradients in ESb layers in addition to providing evidence for the local winds to be responsible for the vertical gradients themselves.