| 北京延庆钠层上边界的平均特性研究 |
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| 引用本文： | 徐亦萌, 林兆祥, 杨国韬, 王继红, 程学武, 李发泉, 杨勇, 杜丽芳, 焦菁, 荀宇畅, 郑浩然, 吴佛菊, 董毅. 2022. 北京延庆钠层上边界的平均特性研究. 地球物理学报, 65(10): 3714-3727, doi: 10.6038/cjg2022P0759 |
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| 作者姓名： | 徐亦萌 林兆祥 杨国韬 王继红 程学武 李发泉 杨勇 杜丽芳 焦菁 荀宇畅 郑浩然 吴佛菊 董毅 |
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| 作者单位： | 中南民族大学电子信息工程学院,武汉 430074;中国科学院国家空间科学中心空间天气学国家重点实验室,北京 100190;中南民族大学电子信息工程学院,武汉 430074;中国科学院国家空间科学中心空间天气学国家重点实验室,北京 100190;中国科学院精密测量科学与技术创新研究院波谱与原子分子物理国家重点实验室,武汉 430071;中国科学院国家空间科学中心空间天气学国家重点实验室,北京 100190;太原理工大学物理与光电工程学院,太原 030024 |
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| 基金项目： | 国家自然科学基金(41627804,42004134)；;国家重点实验室专项基金资助； |
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| 摘 要： | 本文对北京延庆(116.0°E，40.5°N)钠荧光激光雷达2018年11月—2019年12月夜间的数据以1 h和1 km的时空分辨率进行了分析.获得了当地钠层上边界可达到的高度范围、其相应的季节变化、夜间演化等：延庆顶部钠层可达到110 km、120 km和130 km的概率分别为99.94%、84.46%和40.34%，由此得出，顶部钠层在大多数情况下可以达到120 km，突破了顶部钠层在105 km(或者110 km)的传统观点；上边界高度范围的季节变化规律为5—6月份最高，2—3月份最低；后半夜顶部钠层密度会有所增加.我们比较了偶发钠层、温度和流星注入与上边界高度范围的相关性，推测出偶发钠层对钠层上边界拓展有很大贡献，流星注入次之，温度影响最低.后半夜流星注入量增多跟此时顶部钠层密度增加有一定的相关性.对顶部钠层能够提高到120 km的这项研究，可以为拓展风温的探测高度提供理论依据.
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| 关 键 词： | 钠层上边界 季节变化 天亮前钠层密度增加 |
| 收稿时间： | 2021-10-13 |
| 修稿时间： | 2022-03-31 |
Study on average characteristics of upper boundary of sodium layer in Yanqing,Beijing |
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| XU YiMeng, LIN ZhaoXiang, YANG GuoTao, WANG JiHong, CHENG XueWu, LI FaQuan, YANG Yong, DU LiFang, JIAO Jing, XUN YuChang, ZHENG HaoRan, WU FuJu, DONG Yi. 2022. Study on average characteristics of upper boundary of sodium layer in Yanqing, Beijing. Chinese Journal of Geophysics (in Chinese), 65(10): 3714-3727, doi: 10.6038/cjg2022P0759 |
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| Authors: | XU YiMeng LIN ZhaoXiang YANG GuoTao WANG JiHong CHENG XueWu LI FaQuan YANG Yong DU LiFang JIAO Jing XUN YuChang ZHENG HaoRan WU FuJu DONG Yi |
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| Affiliation: | 1. College of Electronics and Information Engineering, South-central University For Nationalities, Wuhan 430074, China; 2. State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China; 3. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Science, Wuhan 430071, China; 4. College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China |
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| Abstract: | In this paper, data from the sodium fluorescence lidar of Yanqing, Beijing (116.0°E, 40.5°N) for the night of November 2018-December 2019 were analysed at resolution of 1 km and 1 hour. The range of heights that can be reached at the upper boundary of the sodium layer, its corresponding seasonal variability, and nighttime evolution were obtained: the probabilities that the top sodium layer in Yanqing can reach 110 km, 120 km and 130 km are 99.94%, 84.46% and 40.34%, respectively, leading to the conclusion that the top sodium layer can reach 120 km in most cases, breaking the traditional view that the top sodium layer is at 105 km (or 110 km); the seasonal pattern of the upper boundary is highest in May-June and lowest in February-March; the density of the top sodium layer increases during the second half of the night. We compare the correlations of sporadic sodium layer, temperature and meteor injection with the upper boundary altitude range and conclude that sporadic sodium layer contributes significantly to the expansion of the upper boundary of the sodium layer, followed by temperature and meteor injection. Moreover, the increased meteor injection in the latter half of the night correlates with the increased density of the top sodium layer at this time. The study of the ability to increase the top sodium layer to 120 km may provide a theoretical basis for extending the detection height of the wind temperature. |
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| Keywords: | Upper boundary of sodium layer Seasonal variations Increased density of sodium layer at the top before dawn |
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