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

Content Provider	Semantic Scholar
Author	Liu, Jianya Reinisch, Bodo Chen, W.-S.
Copyright Year	2005
Abstract	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 E x B drift, the asymmetry ( I a ) of equatorial ionization anomaly (EIA), and the magnetic activity ( K p ) 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 E x B drift and I a . The larger E x B drift (>20m/s) and smaller \| I a \| ( E x B drift and larger \| I a \| are responsible for the lower ESF occurrence in winter months. Regarding the effects of magnetic activity, the ESF occurrence decreases with increasing K p in the equinoctial and winter months, but not in the summer months. Furthermore, the larger and smaller E x B drifts are presented under the quiet ( K p K p ?3) conditions, respectively. These results indicate that the suppression in ESF and the decrease in E x B drifts are mainly caused by the decrease in the eastward electric field.
Starting Page	745
Ending Page	751
Page Count	7
File Format	PDF HTM / HTML
DOI	10.5194/angeo-23-745-2005
Volume Number	23
Alternate Webpage(s)	https://hal.archives-ouvertes.fr/hal-00317603/document
Alternate Webpage(s)	https://www.ann-geophys.net/23/745/2005/angeo-23-745-2005.pdf
Alternate Webpage(s)	http://www.ann-geophys.net/23/745/2005/angeo-23-745-2005.pdf
Alternate Webpage(s)	https://doi.org/10.5194/angeo-23-745-2005
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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