| 北京地区电离层Chapman标高的统计分析 |
| |
| 引用本文： | 解海永,宁百齐,刘立波,余涛,胡连欢,吴宝元,郑建昌,常首民.北京地区电离层Chapman标高的统计分析[J].地球物理学报,2014,57(11):3523-3531. |
| |
| 作者姓名： | 解海永 宁百齐 刘立波 余涛 胡连欢 吴宝元 郑建昌 常首民 |
| |
| 作者单位： | 1. 中国科学院地质与地球物理研究所, 北京空间环境国家野外科学观测研究站, 北京 100029;2. 中国科学院地质与地球物理研究所, 中国科学院行星与地球物理重点实验室, 北京 100029;3. 国家空间天气监测预警中心, 北京 100081 |
| |
| 基金项目： | 国家自然科学基金项目(41127003,41374164,41204113,41104106)、科技基础性工作专项(2008FY120100)资助. |
| |
| 摘 要： | 利用F2层峰值处的Chapman标高Hm可以构建电离层顶部的电子浓度剖面.本文通过对北京站(40.3°N,116.2°E)从2010年1月到2014年5月的电离层频高图人工度量后获得了F2层峰值处的Chapman标高Hm,分析研究了Hm随周日、季节和太阳活动变化,并探讨了Hm与F2层特征参数foF2、hmF2以及IRI底部厚度参数B0的相关性.研究表明,(1)北京地区标高Hm的周日变化明显,在正午左右有最大值,夏季和春秋季的最小值出现在午夜左右,而冬季有两个谷值,在日出后和20:00LT左右; Hm在日出前有较小的增加,但不是很明显;(2)白天标高Hm有明显的季节变化,夏季最强,冬季最弱,而夜间的季节变化较小;(3)Hm随太阳活动的增强而增大,地磁扰动会引起Hm偏离正常水平;(4)Hm与hmF2相关性很弱,但白天和夜间各自的相关性较强,并且夜间大于白天;Hm与B0有很强的相关性;(5)由IRI2012给出的B0与Hm在冬季的相关性很小,表明IRI模式还需要进一步改进.
|
| 关 键 词： | 频高图 电子浓度剖面 标高 IRI |
| 收稿时间： | 2014-09-14 |
Statistical analysis of the ionospheric Chapman scale height at Beijing |
| |
| XIE Hai-Yong,NING Bai-Qi,LIU Li-Bo,YU Tao,HU Lian-Huan,WU Bao-Yuan,ZHENG Jian-Chang,CHANG Shou-Min.Statistical analysis of the ionospheric Chapman scale height at Beijing[J].Chinese Journal of Geophysics,2014,57(11):3523-3531. |
| |
| Authors: | XIE Hai-Yong NING Bai-Qi LIU Li-Bo YU Tao HU Lian-Huan WU Bao-Yuan ZHENG Jian-Chang CHANG Shou-Min |
| |
| Institution: | 1. Beijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;3. National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China |
| |
| Abstract: | The Chapman scale height around F2 peak (Hm) can be used to extrapolate the topside electron density profile. In this paper, plenty of manual work has been done to scale the ionograms recorded at Beijing (40.3°N, 116.2°E) during the period from January 2010 to May 2014, and the scale height Hm around F2 peak is deduced. The diurnal, seasonal and solar activity variations of Hm are statistically analyzed, and the correlations between Hm and the F2 peak parameters foF2, hmF2 and the IRI bottomside thickness parameter B0 are also discussed. The present study showed that: (1) Hm has an obvious diurnal variation with the peak occurring around noontime and the valley occurring at midnight. For winter seasons, the diurnal variation has two valleys with one after sunrise and the other at about 20:00LT. Hm has an increase before sunrise, but it is not distinct. (2) Hm during daytime shows a clear seasonal variation with the maximum in summer and minimum in winter, while exhibits a much weaker seasonal variation at night. (3) Hm increases with increasing solar activity, and significantly deviates from normal behavior during geomagnetic disturbance. (4) The correlation between Hm and hmF2 is very weak, while they have a moderate correlation during nighttime and daytime respectively, and the former is stronger than the latter. Hm is strongly correlated with thickness parameter B0. (5) The small correlation between Hm and B0 from IRI2012 in winter indicates that the IRI model needs further improvement. |
| |
| Keywords: | Ionogram Electron density profile Scale height IRI |
|
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
|
