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The Effects of the Pre-reversal Exb Drift, the Eia Asymmetry, and Magnetic Activity on the Equatorial Spread F During Solar Maximum : Volume 23, Issue 3 (30/03/2005)

By Lee, C.-c.

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Book Id: WPLBN0003990398
Format Type: PDF Article :
File Size: Pages 7
Reproduction Date: 2015

Title: The Effects of the Pre-reversal Exb Drift, the Eia Asymmetry, and Magnetic Activity on the Equatorial Spread F During Solar Maximum : Volume 23, Issue 3 (30/03/2005)  
Author: Lee, C.-c.
Volume: Vol. 23, Issue 3
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2005
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Chen, W., Liu, J., Reinisch, B. W., Lee, C., & Chu, F. (2005). The Effects of the Pre-reversal Exb Drift, the Eia Asymmetry, and Magnetic Activity on the Equatorial Spread F During Solar Maximum : Volume 23, Issue 3 (30/03/2005). Retrieved from http://www.ebooklibrary.org/


Description
Description: General Education Center, Ching-Yun University, No. 229, Chienshin Road, Jhongli City, Taoyuan County 320, Taiwan. We use a digisonde at Jicamarca and a chain of GPS receivers on the west side of South America to investigate the effects of the pre-reversal enhancement (PRE) in ExB drift, the asymmetry (Ia) of equatorial ionization anomaly (EIA), and the magnetic activity (Kp) on the generation of equatorial spread F (ESF). Results show that the ESF appears frequently in summer (November, December, January, and February) and equinoctial (March, April, September, and October) months, but rarely in winter (May, June, July, and August) months. The seasonal variation in the ESF is associated with those in the PRE ExB drift and Ia. The larger ExB drift (>20m/s) and smaller |Ia| (<0.3) in summer and equinoctial months provide a preferable condition to development the ESF. Conversely, the smaller ExB drift and larger |Ia| are responsible for the lower ESF occurrence in winter months. Regarding the effects of magnetic activity, the ESF occurrence decreases with increasing Kp in the equinoctial and winter months, but not in the summer months. Furthermore, the larger and smaller ExB drifts are presented under the quiet (Kp<3) and disturbed (Kp≥3) conditions, respectively. These results indicate that the suppression in ESF and the decrease in ExB drifts are mainly caused by the decrease in the eastward electric field.

Summary
The effects of the pre-reversal ExB drift, the EIA asymmetry, and magnetic activity on the equatorial spread F during solar maximum


 

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