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Observational Evidence for the Plausible Linkage of Equatorial Electrojet (Eej) Electric Field Variations with the Post Sunset F-region Electrodynamics : Volume 27, Issue 11 (10/11/2009)

By Sreeja, V.

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Book Id: WPLBN0003986982
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Observational Evidence for the Plausible Linkage of Equatorial Electrojet (Eej) Electric Field Variations with the Post Sunset F-region Electrodynamics : Volume 27, Issue 11 (10/11/2009)  
Author: Sreeja, V.
Volume: Vol. 27, Issue 11
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Pant, T. K., Ravindran, S., Devasia, C. V., & Sreeja, V. (2009). Observational Evidence for the Plausible Linkage of Equatorial Electrojet (Eej) Electric Field Variations with the Post Sunset F-region Electrodynamics : Volume 27, Issue 11 (10/11/2009). Retrieved from http://www.ebooklibrary.org/


Description
Description: Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum 695022, India. The paper is based on a detailed observational study of the Equatorial Spread F (ESF) events on geomagnetically quiet (Ap≤20) days of the solar maximum (2001), moderate (2004) and minimum (2006) years using the ionograms and magnetograms from the magnetic equatorial location of Trivandrum (8.5° N; 77° E; dip lat ~0.5° N) in India. The study brings out some interesting aspects of the daytime Equatorial Electrojet (EEJ) related electric field variations and the post sunset F-region electrodynamics governing the nature of seasonal characteristics of the ESF phenomena during these years. The observed results seem to indicate a plausible linkage of daytime EEJ related electric field variations with pre-reversal enhancement which in turn is related to the occurrence of ESF. These electric field variations are shown to be better represented through a parameter, termed as E, in the context of possible coupling between the E- and F-regions of the ionosphere. The observed similarities in the gross features of the variations in the parameter E and the F-region vertical drift (Vz) point towards the potential usage of the EEJ related parameter E as an useful index for the assessment of Vz prior to the occurrence of ESF.

Summary
Observational evidence for the plausible linkage of Equatorial Electrojet (EEJ) electric field variations with the post sunset F-region electrodynamics

Excerpt
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