Features of the F-3 layer in the low-latitude ionosphere at sunset

	Features of the F-3 layer in the low-latitude ionosphere at sunset
	Zhao, Biqiang; Wan, Weixing; Reinisch, Bodo; Yue, Xinan; Le, Huijun; Liu, Jing; Xiong, Bo
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2011
卷号	116 页码:A01313
ISSN号	2169-9380
通讯作者	Zhao, BQ (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China.
中文摘要	The F-3 layer is a common feature within +/- 10 degrees of the magnetic equatorial ionosphere in the daytime. According to Balan et al. (1998) the F-3 layer occurs mainly during the morning-noon period due to the combined effect of the upward E x B drift and the neutral wind that provides upward plasma drifts at and above the F-2 layer. The F-3 layer occurrence rate is higher in summer and decreases with increasing solar activity. In this study, the characteristic of the sunset F-3 layer is first investigated using a solar cycle of ionosonde data (1995-2010) from the magnetic equatorial station at Jicamarca, and compared with the features derived from the four subtropical stations at Sao Luis, Fortaleza, Kwajalein, and Vanimo. Evidence shows that the local time distribution of the occurrence of the F-3 layer can extend to the postsunset time (1800-2100 local time). The sunset F-3 layer has a strong seasonal dependence occurring mainly during the summertime. Unlike the daytime F-3 layer, the occurrence of the sunset F-3 layer clearly increases and the virtual height of the bottom side of the F-3 layer statistically increases from 620 to 1000 km with increasing solar activity. In addition, the occurrence of the sunset F-3 layer at the other stations is much less than that at Jicamarca. These features of the dependence on the season, solar activity, and latitude are clearly related to the geomagnetic control of the evening prereversal enhancement of the equatorial zonal electric field and geomagnetic configuration.
英文摘要	The F-3 layer is a common feature within +/- 10 degrees of the magnetic equatorial ionosphere in the daytime. According to Balan et al. (1998) the F-3 layer occurs mainly during the morning-noon period due to the combined effect of the upward E x B drift and the neutral wind that provides upward plasma drifts at and above the F-2 layer. The F-3 layer occurrence rate is higher in summer and decreases with increasing solar activity. In this study, the characteristic of the sunset F-3 layer is first investigated using a solar cycle of ionosonde data (1995-2010) from the magnetic equatorial station at Jicamarca, and compared with the features derived from the four subtropical stations at Sao Luis, Fortaleza, Kwajalein, and Vanimo. Evidence shows that the local time distribution of the occurrence of the F-3 layer can extend to the postsunset time (1800-2100 local time). The sunset F-3 layer has a strong seasonal dependence occurring mainly during the summertime. Unlike the daytime F-3 layer, the occurrence of the sunset F-3 layer clearly increases and the virtual height of the bottom side of the F-3 layer statistically increases from 620 to 1000 km with increasing solar activity. In addition, the occurrence of the sunset F-3 layer at the other stations is much less than that at Jicamarca. These features of the dependence on the season, solar activity, and latitude are clearly related to the geomagnetic control of the evening prereversal enhancement of the equatorial zonal electric field and geomagnetic configuration.
学科主题	空间物理
收录类别	SCI
资助信息	National Natural Science Foundation of China [40804041]; National Important Basic Research Project of China [2011CB811405]; State Key Laboratory of Space Weather, Chinese Academy of Sciences; AF [FA8718-28006-C-0072]; NSF [ATM-0902965]; National Science Foundation [AGS-0961147]
语种	英语
公开日期	2014-12-15
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/3085]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Zhao, Biqiang,Wan, Weixing,Reinisch, Bodo,et al. Features of the F-3 layer in the low-latitude ionosphere at sunset[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2011,116:A01313.
APA	Zhao, Biqiang.,Wan, Weixing.,Reinisch, Bodo.,Yue, Xinan.,Le, Huijun.,...&Xiong, Bo.(2011).Features of the F-3 layer in the low-latitude ionosphere at sunset.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,116,A01313.
MLA	Zhao, Biqiang,et al."Features of the F-3 layer in the low-latitude ionosphere at sunset".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 116(2011):A01313.