Global geomagnetic responses to the IMF B z fluctuations during the September/October 2003 high-speed stream intervals
Global geomagnetic responses to the IMF B z fluctuations during the September/October 2003 high-speed stream intervals
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2003 年 9 月/10 月高速流间隔期间全球地磁对 IMF B z 波动的响应
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Reinhard Hans Walter Friedel
中科院分区：
文献类型：
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作者：
E. Echer;Axel Korth;M. Bolzan;Reinhard Hans Walter Friedel
摘要。本文研究了高速太阳风流（hss）及其旋转相互作用区（CIRs）在Alfvenic波动期间太阳风与地球磁尾、地球同步轨道、极光带和地面的耦合。本文采用交叉小波分析方法，对2003年9月和10月的hss的磁场、粒子通量和极光电喷指数数据进行了分析。我们的研究结果表明，在所有这些区域和多个亚暴指标之间存在非常一致的周期性响应，表明全球磁层对太阳风行星际结构的亚暴响应可能是驱动的。在研究的7个区间中，我们发现周期响应范围从1.8到3.1 h，这与Borovsky et al.（1993）对亚暴间期统计研究的2.75 h峰值一致。
Abstract. In this paper, we follow the coupling from the solar wind to the Earth's magnetotail, geosynchronous orbit, auroral zone and to the ground, during periods of Alfvenic fluctuations in high-speed solar wind streams (HSSs) and their corotating interaction regions (CIRs). We employ cross-wavelet analysis of magnetic field, particle flux and auroral electrojet (AE) index data for the HSSs of September and October 2003. Our results show a remarkably consistent periodic response among all of these regions and across multiple substorm indicators, indicating a possible driven substorm response of the global magnetosphere to the solar wind interplanetary structures. Across the seven intervals studied we find a range of periodic responses from 1.8 to 3.1 h, which is consistent with the 2.75 h peak of the Borovsky et al. (1993) statistical study of inter-substorm periods.