极地研究

极地研究 ›› 2019, Vol. 31 ›› Issue (2): 191-197.DOI: 10.13679/j.jdyj.20180053

• 研究论文 • 上一篇    下一篇

黄河站低热层中性风对极光亚暴的响应

覃明辉  张燕革  艾勇   

  1. 武汉大学电子信息学院, 湖北 武汉 430072
  • 收稿日期:2018-09-17 修回日期:2019-02-16 出版日期:2019-06-30 发布日期:2019-06-30
  • 通讯作者: 张燕革
  • 基金资助:

     国家海洋局极地考察办公室对外合作项目(201606)资助

Response of lower thermospheric neutral wind at Yellow River Station in Arctic to auroral substorm

Qin Minghui, Zhang Yange, Ai Yong   

  • Received:2018-09-17 Revised:2019-02-16 Online:2019-06-30 Published:2019-06-30

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摘要：

热层中性风携带有大气空间环境发生的复杂能量、动力变化过程的信息，因而探索热层中性风对研究全球空间动力学和日地耦合机制具有重要意义。为了研究极光亚暴期间低热层中性风的行为，使用 UT 2017年1月25日至2017年1月28日北极黄河站的全天空法布里-珀罗干涉仪（FPI）OI557nm干涉环图像，反演出水平风场和垂直风场，结合地磁Kp指数以及离子风速，研究了亚暴期间影响低热层风场的因素。结果表明：在地磁平静期视线风速均值80m?s-1，地磁活跃期视线风速均值150m?s-1,地磁活动与低热层中性风具有显著相关性。通过离子拖拽和焦耳加热作用，低热层中性风受到了显著的增强作用，特别是垂直风更为明显，增幅达30m?s-1，其中离子拖拽对风速的急剧变化起主导作用。

关键词: 法布里-珀罗干涉仪(FPI), 低热层中性风, 极光亚暴, 离子拖拽

Abstract:

To study the behavior of thermospheric neutral wind during the auroral substorm, we used the OI 557 nm interference fringe images measured by all-sky Fabry-Perot interferometer (FPI) during January 25th, 2017 to January 27th, 2017 at Yellow River Station in Arctic to get the horizontal and vertical wind, considering the geomagnetic Kp, AE index and the ion drift velocity, the factor was studied that affected the thermospheric neutral wind during the substorm. The results show that the geomagnetic activity is correlated with the neutral wind in the lower thermosphere. In this observed event, the mean value of horizontal wind is 50 m·s−1 and that of vertical wind is 3 m·s−1 during the geomagnetic calm period. In the geomagnetic active period, the horizontal wind mean 80 m·s−1 ion drag and Joule heating promote the neutral wind movement, the strong geomagnetic activity leads to the vertical wind shear phenomenon, and the ion dragging dominates the neutral wind movement.

Key words: Fabry-Perot interferometer, low thermospheric neutral wind, auroral substorm, ion drag