Longitudinal difference in total electron content over the East Asian region: Feature and explanation

doi:10.1016/j.jastp.2016.08.015

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	Longitudinal difference in total electron content over the East Asian region: Feature and explanation
	Yu, Shimei 1; Xiao, Zuo 1,2; Zhao, Biqiang 3; Zhang, Donghe 1; Hao, Yongqiang 1
刊名	JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
	2016-10-01
卷号	148 页码:74-81
关键词	Ionospheric longitudinal difference TEC Thermospheric wind effect
DOI	10.1016/j.jastp.2016.08.015
文献子类	Article
英文摘要	The mechanism of the longitudinal difference of ionospheric electron density is in general attributed to the thermospheric wind effect modulated by the local geomagnetic declination. Although this mechanism is tested in many case studies, there are other possible factors such as solar activity and so on which still need further investigations. In this paper, TEC data from two Chinese GPS stations located at almost same geographic latitudes but with a wide longitude span (similar to 38 degrees) are used to study the morphological features of longitudinal differences under various geophysical conditions. A parameter R-ew is defined as a normalized measure of the TEC difference between the two stations. All the observed temporal variations of R-ew are analyzed statistically, with the results showing that negative east-west differences (Western TEC > Eastern TEC) in the noontime are pronounced during Day of Year (DoY) 90-270, while nighttime positive differences (Western TEC < Eastern TEC) are around DoY 60-90, and 270-300. All above observed features are examined by the dynamic effect of thermospheric wind using the HWM07 model. The results show that although the zonal wind does play an important role on average, it is not sufficient to explain all the observed features, the longitude dependence of the meridian wind must be considered. Finally, we observed a new feature characterized by the summer nighttime positive value in R-ew which could be related to a Midlatitude Summer Night Anomaly (MSNA) phenomenon. So, it is also concluded that besides the thermospheric wind effect, other mechanisms such as the longitudinal dependence of the plasmaspheric downward flux should also be taken into consideration in explaining the longitudinal differences in the ionosphere. (C) 2004 Published by Elsevier Ltd.
WOS关键词	GRAVITY-WAVE ACTIVITY ; SATELLITE DATA ; NORTH-AMERICA ; GLOBAL-MODEL ; GPS NETWORK ; TEC ; WINDS ; PERTURBATIONS ; THERMOSPHERE ; CLIMATOLOGY
WOS研究方向	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
语种	英语
WOS记录号	WOS:000384860000009
资助机构	Chinese Academy of Sciences(KZZD-EW-01) ; Chinese Academy of Sciences(KZZD-EW-01) ; National Science Foundation of China(41131066 ; National Science Foundation of China(41131066 ; National Important Basic Research Project(2011CB811405 ; National Important Basic Research Project(2011CB811405 ; 41574144 ; 41574144 ; 2012CB825604) ; 2012CB825604) ; 41274155 ; 41274155 ; 41174138 ; 41174138 ; 41174065 ; 41174065 ; 41321003) ; 41321003) ; Chinese Academy of Sciences(KZZD-EW-01) ; Chinese Academy of Sciences(KZZD-EW-01) ; National Science Foundation of China(41131066 ; National Science Foundation of China(41131066 ; National Important Basic Research Project(2011CB811405 ; National Important Basic Research Project(2011CB811405 ; 41574144 ; 41574144 ; 2012CB825604) ; 2012CB825604) ; 41274155 ; 41274155 ; 41174138 ; 41174138 ; 41174065 ; 41174065 ; 41321003) ; 41321003)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53282]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
作者单位	1.Peking Univ, Sch Earth & Space Sci, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Yu, Shimei,Xiao, Zuo,Zhao, Biqiang,et al. Longitudinal difference in total electron content over the East Asian region: Feature and explanation[J]. JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,2016,148:74-81.
APA	Yu, Shimei,Xiao, Zuo,Zhao, Biqiang,Zhang, Donghe,&Hao, Yongqiang.(2016).Longitudinal difference in total electron content over the East Asian region: Feature and explanation.JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,148,74-81.
MLA	Yu, Shimei,et al."Longitudinal difference in total electron content over the East Asian region: Feature and explanation".JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS 148(2016):74-81.