| 利用GCITEM-IGGCAS模拟DE2潮汐Hough波模对电离层的影响 |
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| 引用本文： | 姜金哲,乐新安,任志鹏,万卫星.利用GCITEM-IGGCAS模拟DE2潮汐Hough波模对电离层的影响[J].地球物理学报,2020,63(1):57-62. |
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| 作者姓名： | 姜金哲 乐新安 任志鹏 万卫星 |
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| 作者单位： | 1. 地球与行星物理重点实验室, 中国科学院地质与地球物理研究所, 北京 100029;2. 中国科学院地球科学研究院, 北京 100029;3. 中国科学院大学地球与行星科学学院, 北京 100049 |
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| 基金项目： | 国家自然科学基金委项目（41621063，41874179）、中国科学院重大科技基础设施开放研究项目"基于子午工程的中低纬大气层-电离层的相互作用研究"和中组部青年千人计划资助. |
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| 摘 要： | 本文利用GCITEM-IGGCAS模式,从电动力学耦合作用和直接上传两种作用方式,详细模拟研究了DE2潮汐4种Hough波模分量对电离层的影响.我们将不同种类的Hough波模分别输入到模式当中作为底层边界条件,驱动模式模拟得到电离层的电子密度变化,从中分离两种作用机制的响应进行分析.模拟结果发现电离层对DE2的4种Hough波模的响应都表现为半年变化,波峰出现在春季和秋季,波谷则出现在冬季和夏季.一天的变化特性上,赤道对称波模的响应出现明显的4个峰值和谷值,其他3种波模响应主要表现为一个峰值和谷值.4种波模当中赤道对称波模对电离层的作用最为明显,占据主导地位,对电离层的影响表现为波动效应,其中3波分量的响应最强,主要由电动力学作用控制.其他3种波模对电离层则是削弱作用.本研究可以帮助我们更深刻的理解非迁移潮汐对电离层的作用方式和效果.
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| 关 键 词： | 电离层 非迁移潮汐 Hough模 电动力学耦合 |
| 收稿时间： | 2019-04-20 |
Simulated ionospheric responses to DE2 Hough modes by GCITEM-IGGCAS |
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| JIANG JinZhe,YUE XinAn,REN ZhiPeng,WAN WeiXing.Simulated ionospheric responses to DE2 Hough modes by GCITEM-IGGCAS[J].Chinese Journal of Geophysics,2020,63(1):57-62. |
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| Authors: | JIANG JinZhe YUE XinAn REN ZhiPeng WAN WeiXing |
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| Institution: | 1. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2. Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing 100029, China;3. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Using GCITEM-IGGCAS model, this study investigates ionosphere's responses to DE2's Hough modes from below by both electro-dynamical coupling and the upward tidal wave propagation. We put different Hough modes in the model as lower boundary to simulate electron density's variation of ionosphere, and then separate the responses of two mechanisms in details. The results show that the ionosphere due to DE2's four Hough modes all show semi-annual variation, with the peak appearing at spring and autumn, and the trough at winter and summer. The response of equator symmetric mode appears four peaks and troughs in one day, and other three modes' responses show only one peak and trough. The equator symmetric mode is the most important one of four Hough modes, and its effect shows a wave pattern, with main wave number of WN3 dominated by electro-dynamical coupling. The other modes weaken the variation of ionosphere's electron density. This method helps us to understand how the non-migrating tide affecting ionosphere. |
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| Keywords: | Ionosphere Non-migrating tide Hough mode Electro-dynamical coupling |
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