...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Polar Ion Temperature Variations During the 22 January 2012 Magnetic Storm
【24h】

Polar Ion Temperature Variations During the 22 January 2012 Magnetic Storm

机译：在22极离子温度变化2012年1月磁暴

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We study the 22 January 2012 magnetic storm, during which some localized neutral density (DN) increases developed, and its polar ion temperature (T_i) variations in terms of the earthward Poynting flux (S||) deposited into the coupled ionosphere-thermosphere system. We investigate the storm's nature, some flow channel events that are the ionospheric signatures of flux transfer events triggered by magnetic reconnections, and the resultant thermospheric responses. We utilize solar and interplanetary magnetic field data and multi-instrument topside ionospheric and thermospheric measurements. Results reveal the presence of antisunward propagating solar wind Alfven waves during the various storm phases triggering flux transfer events/flow channel events and launching atmospheric gravity waves whose T_i signatures appeared as episodic T_i variations. Various scenarios demonstrate the direct correlation between S_|| and D_N and the irregular T_i responses within/above flow channels that we explain in terms of frictional heating (T_(frc)). We identify T_i responses during various flow channel events as (1) direct/intermittent and (2) opposite, with S_|| and D_N reflecting the respective underlying flow channel development at the time of detection as (1) early stage when T_(frc) was high due to the still large velocity differences between ions and neutrals and as (2) late stage when T_(frc) ceased since ions and neutrals moved together. T_i oscillations are observed to be originating from polar or auroral flow channels and propagating across the polar cap toward the equator. We conclude that antisunward solar wind Alfven waves had a significant impact on T_i variability during this storm by modulating magnetic reconnection and launching atmospheric gravity waves.
机译：研究了磁风暴,2012年1月22日在一些局部中性密度(DN)增加发达,其极性离子温度(T_i)的变化向地球的能流密度通量(| |)存入耦合ionosphere-thermosphere系统。调查风暴的性质,一些流动通道事件的电离层签名通量传输事件引发的磁场重新连接,结果thermospheric响应。磁场数据和multi-instrument上部电离层和thermospheric测量。结果显示antisunward的存在传播太阳风阿尔芬波中各种风暴阶段触发通量传输事件/流道和发射事件大气重力波的T_i签名作为情景T_i出现变化。场景演示直接相关之间S_ | | D_N和不规则T_i在/高于流动通道,我们的反应解释的摩擦加热(T_ (frc)识别)。我们确定T_i反应在各种流通道事件(1)直接/间歇和(2)相反,S_ | |和D_N反映各自潜在的流动通道发展检测的时间(1)早期的时候T_ (frc)识别高由于仍然大速度不同离子和中性色(2)后期当T_ (frc)停止因为离子和识别中性色一起移动。观察到的来自极地或极光在极地流渠道和传播帽向赤道。antisunward太阳风阿尔芬波了这期间对T_i变化产生重大影响通过调节磁重联和风暴开展大气重力波。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号