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DOI | 10.1029/2019GL086372 |
Flux Erosion of Magnetic Clouds by Reconnection With the Sun's Open Flux | |
Pal S.; Dash S.; Nandy D. | |
发表日期 | 2020 |
ISSN | 0094-8276 |
卷号 | 47期号:8 |
英文摘要 | Magnetic clouds (MCs) are flux rope magnetic structures forming a subset of solar coronal mass ejections, which have significant space weather impacts. The geoeffectiveness of MCs depends on their properties, which evolve during their interplanetary passage. Based on an analysis of observations spanning two solar cycles, we establish that MCs interacting with the ambient solar wind magnetic field (i.e., heliospheric open flux) lose a substantial amount of their initial magnetic flux via magnetic reconnection, which, in some cases, reduce their geoeffectiveness. We find a linear correlation between the eroded flux of MCs and solar open flux which is consistent with the scenario that MC erosion is mediated via the local heliospheric magnetic field draping around an MC during its interplanetary propagation. The solar open flux is governed by the sunspot cycle. This work therefore uncovers a hitherto unknown pathway for solar cycle modulation of the properties of MCs. ©2020. American Geophysical Union. All Rights Reserved. |
英文关键词 | Magnetic fields; Solar energy; Coronal mass ejection; Geoeffectiveness; Heliospheric magnetic fields; Interplanetary propagation; Linear correlation; Magnetic clouds; Magnetic reconnections; Solar cycle modulation; Erosion; corona; correlation; interplanetary dust; magnetic field; solar cycle; solar wind; sunspot |
语种 | 英语 |
来源期刊 | Geophysical Research Letters |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/170447 |
作者单位 | Center of Excellence in Space Sciences India, Indian Institute of Science Education and Research Kolkata, Mohanpur, India; Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India |
推荐引用方式 GB/T 7714 | Pal S.,Dash S.,Nandy D.. Flux Erosion of Magnetic Clouds by Reconnection With the Sun's Open Flux[J],2020,47(8). |
APA | Pal S.,Dash S.,&Nandy D..(2020).Flux Erosion of Magnetic Clouds by Reconnection With the Sun's Open Flux.Geophysical Research Letters,47(8). |
MLA | Pal S.,et al."Flux Erosion of Magnetic Clouds by Reconnection With the Sun's Open Flux".Geophysical Research Letters 47.8(2020). |
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