| 电离层水平电场与风场的耦合模拟研究 |
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| 引用本文： | 解海永, 余涛, 王铁邦, 王乐. 电离层水平电场与风场的耦合模拟研究[J]. 空间科学学报, 2014, 34(4): 406-414. doi: 10.11728/cjss2014.04.406 |
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| 作者姓名： | 解海永 余涛 王铁邦 王乐 |
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| 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.国家空间天气监测预警中心 北京 100081;;3.南京信息工程大学物理与光电工程学院 南京 210044;;4.中国科学院西安光学精密机械研究所 西安 710119 |
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| 基金项目： | 国家自然科学基金项目资助(40974094,41104106) |
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| 摘 要： | 设计了一个将电离层水平电场与风场耦合的模拟方案，研究了电流函数和风场在耦合前后的变化与差异. 研究发现，水平电场与风场相互反馈后，风场的变化比电流函数小. 经向风在白天有较明显的差异，夜晚的差异比白天小，主要出现在中高纬地区，并随高度的增加而增大，300km左右达到最大值，其后几乎保持不变. 纬向风有与经向风相似的变化，但纬向风耦合前后的差异比经向风小. 电流函数在耦合后有较大改变，两个涡旋强度都有较强增加，并且北半球的增强大于南半球，而夜晚差异较小. 结果表明，在研究的高度范围内，风场对电场的控制作用大于电场对风场的影响.
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| 关 键 词： | 电离层电场 热层风场 耦合与反馈 数值模拟 |
| 收稿时间： | 2013-10-29 |
| 修稿时间： | 2014-03-07 |
Modeling Study on the Coupling Effect of the Horizontal Electric Field and Winds in the Ionosphere |
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| Xie Haiyong, Yu Tao, Wang Tiebang, Wang Le. Modeling Study on the Coupling Effect of the Horizontal Electric Field and Winds in the Ionosphere[J]. Chinese Journal of Space Science, 2014, 34(4): 406-414. doi: 10.11728/cjss2014.04.406 |
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| Authors: | Xie Haiyong Yu Tao Wang Tiebang Wang Le |
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| Affiliation: | 1. Beijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029;;2. National Center for Space Weather, Beijing 100081;;3. School of Physics Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing 210044;;4. Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119 |
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| Abstract: | Based on the available ionospheric dynamo theoretical model and thermospheric winds theoretical model, a coupling scheme between horizontal electric field and winds is proposed. Considering mutual feedback, the differences with and without coupling between current function and winds were analyzed. The result shows that after mutual feedback, the morphology of wind field changes less than current function. The meridional wind has a distinct change during daytime. The change at night is smaller than that of daytime. This distinct change mainly appears in mid- and high-latitude. It increases with altitude and changes little above 300km. The zonal wind is similar to meridional wind, but the change is even smaller. While the current function has a large change with coupling. The two vortexes of Sq currents both have an enhancement. With coupling, northern hemisphere vortex increases 15kA at vernal equinox which is greater than southern hemisphere. The current function at night changes little with coupling. The result shows that within the heights considered, winds control electric field obviously greater than electric field to winds. This research will deepen the understanding of the coupling mechanism between neutral atmosphere and ionospheric plasma by the momentum and dynamo equations. It improves our knowledge of the dynamic processes in ionosphere. |
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| Keywords: | Ionospheric electric field Thermospheric wind field Coupling and feedback Numerical simulation |
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