Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.621 IF 1.621
  • IF 5-year value: 1.614 IF 5-year 1.614
  • CiteScore value: 1.61 CiteScore 1.61
  • SNIP value: 0.900 SNIP 0.900
  • SJR value: 0.910 SJR 0.910
  • IPP value: 1.58 IPP 1.58
  • h5-index value: 24 h5-index 24
  • Scimago H index value: 80 Scimago H index 80
Volume 29, issue 7 | Copyright
Ann. Geophys., 29, 1267-1275, 2011
https://doi.org/10.5194/angeo-29-1267-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.

  19 Jul 2011

19 Jul 2011

Investigation of the response time of the equatorial ionosphere in context of the equatorial electrojet and equatorial ionization anomaly

L. Jose1, S. Ravindran1, C. Vineeth1, T. K. Pant1, and S. Alex2 L. Jose et al.
  • 1Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum, India
  • 2Indian Institute of Geomagnetism, Navi Mumbai, India

Abstract. Equatorial Electrojet (EEJ) and Equatorial Ionization Anomaly (EIA) are two large-scale processes in the equatorial/low latitude ionosphere, driven primarily by the eastward electric field during daytime. In the present paper we investigate the correlation between the Integrated EEJ strength (IEEJ) and the EIA parameters like the total electron content at the northern crest, location of crest in Magnetic latitude and strength of the EIA for the Indian sector. A good correlation has been observed between the IEEJ and EIA when a time delay is introduced between IEEJ and EIA parameters. This time delay is regarded as the response time of equatorial ionosphere in context of the evolution of EIA vis-à-vis EEJ. Further, a seasonal variation in the time delay has been observed, which is believed to be due to changes in thermospheric wind. Using the response time and the linear relationship obtained, the possibility of near-real time prediction of EIA parameters has been attempted and found that the prediction holds well during the geomagnetically quiet periods. The paper discusses these aspects in detail.

Publications Copernicus
Download
Citation
Share