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Auroral streamers implication for the substorm progression on September 14, 2004

机译:极光彩带暗示2004年9月14日亚风暴的发展

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摘要

Magnetospheric substorms manifest a fundamental disturbance in geospace. Understanding of sub storm progression is essential for solar terrestrial physics and space weather research. The auroral streamer and the bursty bulk flows (BBFs) were simultaneously observed by the IMAGE/WIC and the Cluster in the midtail (X~-16R_E), whose footprint was near the auroral streamer, respectively, during a substorm on September 14,2004. The auroral poleward boundaries (APBs) are 2~3° MLAT lower than the open-closed field line boundaries (OCBs) during the growth phase. After the expansion onset, streamer elongated poleward, and the location of APBs became coincident with OCBs. These observa tions are consistent with the scenario that substorm activations start from plasma sheet reconnection of closed field lines during growth phase; in the expansion phase the open field line in the lobes are involved in reconnection in tail.
机译:磁层副风暴显示出地球空间的根本扰动。了解亚风暴的进程对于太阳地面物理学和太空天气研究至关重要。在2004年9月14日的一次亚暴期间,IMAGE / WIC和中尾组(X〜-16R_E)分别观测到了极光拖缆和突发性大流量(BBF),它们的足迹接近极光拖缆。 。在生长期,极光极向边界(APBs)比开闭式场线边界(OCBs)低2〜3°MLAT。膨胀开始后,拖缆向两极拉长,APB的位置与OCB一致。这些观察结果与以下情况一致:亚暴激活是在生长阶段从封闭场线的等离子薄片重新连接开始的;在扩展阶段,裂片中的开放磁场线参与尾部的重新连接。

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  • 来源
    《Planetary and space science》 |2012年第1期|p.119-124|共6页
  • 作者单位

    Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China;

    School of Earth and Space Sciences, Peking University, Beijing, China;

    Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China;

    School of Earth and Space Sciences, Peking University, Beijing, China;

    School of Physics, Peking University, Beijing, China;

    School of Physics, Peking University, Beijing, China;

    Space Science Laboratory, University of California, Berkeley, CA, USA;

    Institute of Physics, University of St. Petersburg. Ulyanovskaya, Russia;

    Institute of Solar-Terrestrial Physics, Russian Academy of Sciences, Irkusk, Russia;

    School of Earth and Space Sciences, Peking University, Beijing, China;

    School of Earth and Space Sciences, Peking University, Beijing, China;

    School of Earth and Space Sciences, Peking University, Beijing, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    substorm; aurora streamer; reconnection;

    机译:亚暴极光流光;重新连接;

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