| 昆明上空电离层D区电子密度季节变化的首次观测分析 |
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| 引用本文： | 李娜,陈金松,丁宗华,赵振维,吴健.昆明上空电离层D区电子密度季节变化的首次观测分析[J].空间科学学报,2014,34(6):809-814. |
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| 作者姓名： | 李娜 陈金松 丁宗华 赵振维 吴健 |
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| 作者单位： | 1.中国电波传播研究所 电波环境特性及模化技术重点实验室 青岛 266107 |
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| 基金项目： | 国家自然科学基金项目资助 |
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| 摘 要： | 通过分析2008年8月至2009年7月昆明站(25.6°N, 103.8°E) 中频(MF)雷达观测数据, 研究了太阳活动低年电离层D区电子密度的季节变化特性,发现D区电子密度主要呈现半年变化特征, 即在春秋季电子密度较大, 而在夏冬季则较小, 这与国际参考电离层(IRI)预测的年变化趋势不一致, 但与昆明站电离层测高仪的最低回波频率fmin的观测结果相符. 同时比较了D区电子密度半年变化与纬向风半年变化的关系, 发现二者之间保持了非常一致的变化趋势并对这种一致性的内在原因进行了分析.
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| 关 键 词： | 电离层D区 电子密度 纬向风 季节变化 |
| 收稿时间： | 2013-12-20 |
First Observation and Analysis of Seasonal Variation of the Ionosphere D Region Electron Density at Kunming |
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| LI Na,CHEN Jinsong,DING Zonghua,ZHAO Zhenwei,WU Jian.First Observation and Analysis of Seasonal Variation of the Ionosphere D Region Electron Density at Kunming[J].Chinese Journal of Space Science,2014,34(6):809-814. |
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| Authors: | LI Na CHEN Jinsong DING Zonghua ZHAO Zhenwei WU Jian |
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| Institution: | 1.National Key Laboratory of Electron Magnetic Environment, China Research Institute of Radio Wave Propagation, Qingdao 2661072.Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 1001903.University of Chinese Academy of Sciences, Beijing 1000494.State Key Laboratory for Space Weather, Beijing 100190 |
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| Abstract: | The observed data by Kunming MF radar (25.6°N, 103.8°E) from August 2008 to July 2009 are employed to investigate the seasonal variation of the ionosphere D region electron density during low solar activity. The obvious characteristics in D region electron density is semiannual variation with the observed values larger in spring and autumn, smaller in su mmer and winter, which is different from the simulated result by International Reference Ionosphere (IRI). The result conforms to that observed by digital ionosonde. Then, comparison with that of zonal wind shows very good correspondence of changing trend between them. Finally the reasons leading to the correspondence are discussed. |
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| Keywords: | Ionosphere D region Electron density Zonal wind Seasonal variation |
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