Geoeffectiveness of Stream Interaction Regions From 1995 to 2016

Geoeffectiveness of Stream Interaction Regions From 1995 to 2016
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1995-2016年河流相互作用区域的地缘效应

DOI:
10.1029/2018sw001894
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发表时间:
2018-12
期刊:
Space Weather
影响因子:
--
通讯作者:
Xu Mengjiao
Xu Mengjiao
中科院分区:
其他
文献类型:
--
作者:
Chi Yutian;Shen Chenglong;Luo Bingxian;Wang Yuming;Xu Mengjiao

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流相互作用区(SIRS)是地磁暴的重要来源。在这项工作中,我们首先延长了Jian等人开发的广泛使用的SIR星表的结束时间。(2006年,https://doi.org/10.1007/s11207-006-0132-3),,涵盖1995年至2009年至2016年底。基于扩展的SIR目录,详细讨论了SIRS的地质有效性。结果发现,52%的SIRS能引起Dstmin≤−为30nT的地磁暴,但只有3%的SIRS能引起Dstmin≤−为100nT的强烈磁暴。此外,我们还发现,在由SIRS引起的10个强烈地磁暴中,有10个与SIRS和行星际日冕物质抛射(ICME)相互作用造成的复杂结构有关。在这种结构中,ICME嵌入在SIR中,位于慢太阳风流和快太阳风流之间。此外,我们还发现,SIRS与洲际生态系统相互作用的地质有效性得到了提高。SIR-ICME相互作用结构引起地磁暴的可能性明显高于孤立的SIRS或孤立的ICME。特别是,SIR-ICME相互作用结构的地质有效性与激波-ICME相互作用结构相似,后者已被证明是地磁暴的主要原因。
Stream interaction regions (SIRs) are important sources of geomagnetic storms. In this work, we first extend the end time of the widely used SIR catalog developed by Jian et al. (2006, https://doi.org/10.1007/s11207-006-0132-3), which covered the period from 1995 to 2009, to the end of 2016. Based on this extended SIR catalog, the geoeffectiveness of SIRs is discussed in detail. It was found that 52% of the SIRs caused geomagnetic storms with Dstmin ≤−30 nT, but only 3% of them caused intense geomagnetic storms with Dstmin ≤−100 nT. Furthermore, we found that 10 of the intense geomagnetic storms caused by SIRs were associated with complex structures due to interactions between SIRs and interplanetary coronal mass ejections (ICMEs). In such a structure, an ICME is embedded in the SIR and located between the slow and fast solar wind streams. In addition, we found that the geoeffectiveness of SIRs interacting with ICMEs is enhanced. The possibility of SIR‐ICME interaction structures causing geomagnetic storms is markedly higher than that of isolated SIRs or isolated ICMEs. In particular, the geoeffectiveness of SIR‐ICME interaction structures is similar to that of the Shock‐ICME interaction structures, which have been demonstrated to be the main causes of geomagnetic storms.
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